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Q3 2017_SL0601754315 1020 Winding Creek Road, Suite 110, Roseville, CA 95678 tel 916.782.8700 fax 916.782.8750 December 15, 2017 Mr. Scott Reisch, Partner Hogan Lovells US LLP One Tabor Center, Suite 1500 1200 Seventeenth Street Denver, CO 80202 Mr. William F. Tarantino, Partner Morrison & Foerster LLP 425 Market Street San Francisco, CA 94105 SUBJECT: Third Quarter 2017 Groundwater Monitoring Report and Current Site Remediation Status Report Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard South Lake Tahoe, California Dear Mssrs. Reisch and Tarantino: Pursuant to your request, please find attached the above-captioned Groundwater Monitoring Report (QMR) and Remediation Status Report (RSR). The document was prepared to comply with Cleanup and Abatement Order (CAO) R6T-2017-022 dated May 27, 2017 by the State of California Regional Water Quality Control Board – Lahontan Region, South Lake Tahoe Branch (CRWQCB). If you have any questions, or comments, please call the undersigned, or Phil Goalwin, at 916- 782-8700. Sincerely, E2C Remediation cc: Mr. Brian Grey, P.G. Engineering Geologist CRWQCB – Lahontan Region, South Lake Tahoe Office 2501 Lake Tahoe Boulevard South Lake Tahoe, CA 96150 Aiguo Xu, Ph.D. Principal Engineer C.E. # 72685 1020 Winding Creek Road, Suite 110, Roseville, CA 95678 tel 916.782.8700 fax 916.782.8750 THIRD QUARTER 2017 GROUNDWATER MONITORING REPORT AND CURRENT SITE REMEDIATION STATUS REPORT Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard South Lake Tahoe, California December 15, 2017 Project Number: 1950BK26 Prepared For: Fox Capital Management Corporation 4582 S. Ulster Street Parkway, Suite 1100 Denver, CO 80237 Seven Springs Limited Partnership c/o Christopher Blair Vice President The Commerce Trust Company 118 West 47th Street Kansas City, MO 64112 Prepared By: E2C Remediation Environmental Engineering, Consulting & Remediation, Inc. 1020 Winding Creek Road, Suite 110 Roseville, California 95678 Project Number 1950BK26 December 15, 2017 E2C Remediation i TABLE OF CONTENTS TABLE OF CONTENTS .................................................................................................. i LIST OF FIGURES........................................................................................................ ii LIST OF TABLES.......................................................................................................... ii LIST OF GRAPHS ........................................................................................................ iii LIST OF APPENDICES ................................................................................................ iii EXECUTIVE SUMMARY ............................................................................................... 1 Groundwater Elevation Monitoring ........................................................................... 1 Groundwater Chemical Conditions Monitoring ......................................................... 1 Shallow Soil Vapor Monitoring .................................................................................. 1 Discussion of Remediation Data ............................................................................... 2 Discussion of Batch Pumping Data ........................................................................... 2 Conclusions .............................................................................................................. 2 Recommendations .................................................................................................... 3 Discussion of Future Activities ................................................................................. 3 1.0 INTRODUCTION ................................................................................................. 4 1.1 Site Description............................................................................................... 4 1.2 Remedial System Operations ........................................................................... 4 2.0 THIRD QUARTER 2017 GROUNDWATER MONITORING .................................... 5 2.1 Groundwater Elevation Monitoring .................................................................. 5 2.2 Groundwater Sampling ................................................................................... 5 2.2.1 Chemical Analysis of Groundwater Samples ............................................. 6 2.2.2 Summary of Groundwater Analytical Results ............................................ 6 2.2.3 Quality Control Samples ........................................................................... 7 2.2.4 Electronic Submittal of Data to GeoTracker Database ............................... 7 2.3 Shallow Soil-Vapor Sampling .......................................................................... 7 2.3.1 Summary of Shallow Soil-Vapor Data ......................................................... 7 2.4 Discussion of Monitoring Data ........................................................................ 8 3.0 CURRENT SITE REMEDIATION STATUS .......................................................... 10 3.1 Batch Pumping Events .................................................................................. 10 4.0 CONCLUSIONS ................................................................................................ 11 5.0 RECOMMENDATIONS ...................................................................................... 12 6.0 FUTURE ACTIVITIES ........................................................................................ 12 7.0 LIMITATIONS AND CERTIFICATION ................................................................. 13 8.0 REFERENCES .................................................................................................. 14 Project Number 1950BK26 December 15, 2017 E2C Remediation ii LIST OF FIGURES Figure 1 Site Location Map Figure 2 Site Plan Figure 3 Third Quarter 2017 Groundwater Gradient Plot (Shallow Zone) Figure 3A Third Quarter 2017 Groundwater Gradient Plot (Middle Zone) Figure 4 Third Quarter 2017 Dissolved-Phase PCE Distribution Plot (Shallow Zone) Figure 4A Third Quarter 2017 Dissolved-Phase PCE 5 µg/L Boundary Plot (Shallow Zone) Figure 4B Third Quarter 2017 Dissolved-Phase PCE Distribution Plot (Middle Zone) Figure 5 Third Quarter 2017 Dissolved-Phase TCE Distribution Plot (Shallow Zone) Figure 5A Third Quarter 2017 Dissolved-Phase TCE Distribution Plot (Middle Zone) Figure 6 Third Quarter 2017 Dissolved-Phase cis-1,2-DCE Distribution Plot (Shallow Zone) Figure 6A Third Quarter 2017 Dissolved-Phase cis-1,2-DCE Distribution Plot (Middle Zone) Figure 7A Third Quarter 2017 Shallow Soil Vapor Distribution Plot Figure 7B Third Quarter 2017 Shallow Soil Vapor PCE Distribution Plot Figure 7C November 29 2017 Shallow Soil Vapor Distribution Plot Figure 7D November 29, 2017 Shallow Soil Vapor PCE Distribution Plot Figure 8 Remediation Well Location Plot LIST OF TABLES Table 1 Summary of Third Quarter 2017 Groundwater Monitoring Data Table 2 Summary of Historical Groundwater Elevation Data Table 3 Summary of Historical Groundwater Analytical Data Table 4A Summary of Historical VP Shallow Soil-Gas Analytical Data Table 4B Summary of Historical VP Shallow Soil-Gas Analytical Data – Other VOCs Table 5 Summary of Well Construction Details Table 6 Summary of SVE/GASS Remediation System Operational Data Table 7 Summary of VE Wellfield Data Table 8 Summary of Historical Interim Remedial System Vapor Laboratory Analytical Data Project Number 1950BK26 December 15, 2017 E2C Remediation iii LIST OF GRAPHS Graph 1 Lake Tahoe Laundry Works Hydrograph - 12/4/09 - Current Graph 2 LW-MW-1S PCE Concentration Trends Graph 3 LW-MW-2S PCE Concentration Trends Graph 4 LW-MW-5S PCE Concentration Trends Graph 5 LW-MW-9S PCE Concentration Trends Graph 6 LW-MW-10S/10SR PCE Concentration Trends Graph 7 LW-MW-11S PCE Concentration Trends Graph 8 LW-MW-12S PCE Concentration Trends Graph 9 LW-MW-13S PCE Concentration Trends Graph 10 OS-1 PCE Concentration Trends LIST OF APPENDICES Appendix A Groundwater Monitoring Field Data Sheets Appendix B Laboratory Groundwater Analytical Report Appendix C GeoTracker Upload Confirmation Reports Appendix D Shallow Soil Vapor Sampling Field Data Sheets Appendix E Soil-Gas Monitoring Procedures (From IRAWP) Appendix F Laboratory VP Well Vapor Analytical Reports Appendix G SVE/GASS Influent and Effluent Vapor Analytical Laboratory Reports Appendix H SVE/GASS Field Data Sheets Appendix I Batch Pumping Summary Tables Appendix J Batch Pumping Field Data Sheets Appendix K Batch Pumping Laboratory Groundwater Analytical Reports Project Number 1950BK26 December 15, 2017 E2C Remediation 1 EXECUTIVE SUMMARY This report documents groundwater and shallow soil vapor monitoring activities conducted at the Lake Tahoe Laundry Works (LTLW) facility located at 1024 Lake Tahoe Boulevard in South Lake Tahoe, California (Site) for the Third Quarter 2017. In addition, this report provides a discussion of remedial actions conducted through September 2017. Groundwater Elevation Monitoring Based on the September 2017 groundwater elevation data, groundwater elevations in on-site shallow groundwater monitoring wells decreased in average elevation by approximately 4.95 feet from the Second Quarter 2017 to the Third Quarter 2017. The direction of groundwater flow in the shallow zone aquifer was generally northwesterly, which was generally consistent with previous monitoring results. Groundwater Chemical Conditions Monitoring In September 2017, only two (2) onsite shallow groundwater monitoring wells (LW-MW-1S and LW-MW-5S) were reported to contain tetrachloroethene (PCE) at a concentration greater than 5 micrograms per liter (µg/L). Trichloroethene (TCE) was not detected at, or above the laboratory Method Reporting Limit (MRL) in the all sampled on-site shallow groundwater monitoring wells except a reported low concentration of 0.51 µg/L in LW-MW-1S. Cis-1,2-dichloroethene (cis-1,2-DCE) was only reported in LW-MW-1S at a concentration of 0.67 µg/L in shallow groundwater. In September 2017, three deeper groundwater monitoring wells (LW-MW-1D, LW-MW-2D and LW-MW-5D) were sampled. PCE was reported at concentrations of 210 µg/L in LW-MW-1D, 5.6 µg/L in LW-MW-2D, and 1.1 µg/L in LW-MW-5D. TCE was reported in LW-MW-1D at a concentration of 4.7 µg/L and cis-1,2-DCE was reported in LW-MW-1D at a concentration of 2.2 µg/L. All other VOCs were reported as non-detect. Monitoring well LW-MW-1D also was sampled in November 2017 after completing batch pumping. PCE declined to 7.3 µg/L and all other VOCs were reported as non-detect in the sample collected from LW-MW-1D in November 2017. Off-site monitoring well OS-1 was reported to contain a concentration of 1.4 µg/L for PCE, which is below the Maximum Contaminant Level of 5 µg/L. Shallow Soil Vapor Monitoring Shallow soil vapor wells were sampled in September and November 2017. VOC concentrations at the shallow soil vapor wells increased substantially from December 2016 to September 2017, but declined in November 2017. The concentrations of VOCs in soil vapor in and around the source area were above the Environmental Screening Levels for soil vapor in a commercial setting developed by the Regional Water Quality Control Board, San Francisco Bay Region (SFRWQCB, 2016). The VOC concentration increases are likely associated with the shutdown of the SVE/GASS system due to a lack of power. Batch pumping events in LW-MW-1S and LW-MW-5S also may have affected subsurface conditions. Project Number 1950BK26 December 15, 2017 E2C Remediation 2 Power was restored to the SVE/GASS on October 24, 2017. VOC concentrations measured in shallow soil vapor wells during the November 2017 sampling event decreased substantially from the September 2017 sampling event. Accordingly, VOCs in soil vapor are anticipated to continue to decline until concentrations at or below those before the SVE/GASS shutdown occurred are reached. Discussion of Remediation Data All SVE/GASS wells were operating during the Third Quarter 2017 until August 29, 2017 when the power was off. The SVE/GASS system resumed operation on October 24, 2017 when power was restored. Based on laboratory-derived vapor influent concentrations and incremental running time, approximately 936.87 pounds (lbs) of VOC mass have been removed via remediation system operations using the SVE/GASS through August 29, 2017. VOCs were detected at a low concentration of 0.016 ppmV in a vapor sample collected from SVE system influent on July 28, 2017. The average mass removal rate for the Third Quarter 2017 was approximately 0.0013 lbs/day or approximately 1 pound every 2+ years assuming no further concentration decreases. Discussion of Batch Pumping Data Batch pumping events started on September 22, 2017. There have been six (6) batch pumping events, which lasted approximately 8 hours each. A total of 3,850 gallons of water has been extracted. Groundwater PCE concentrations after batch pumping are less than those before batch pumping. Future groundwater monitoring will verify if this condition persists. As requested by RWQCB staff, batch pumping was discontinued on October 24, 2017 to allow completion of an onsite and offsite groundwater investigation scheduled for January 2018. Conclusions Based on the monitoring data collected to date, the following conclusions can be made:  At the time of the Third Quarter 2017 event, site groundwater flow in the shallow zone aquifer is to the northwest at average hydraulic gradients of 0.013 to 0.021 ft/ft;  Site groundwater elevation in shallow monitoring wells decreased by an average of 4.95 feet from the Second Quarter 2017 to the Third Quarter 2017;  The Third Quarter 2017 groundwater monitoring data indicated PCE concentration was lower in wells LW-MW-1S and LW-MW-5S while PCE concentration in LW-MW-2S was greater compared to Second Quarter 2017 results;  PCE concentration in off-site well OS-1 was below the Maximum Contaminant Level of 5.0 µg/L in the Third Quarter 2017;  Based on a comparison of current results to previous sampling results, the lateral and vertical extent of PCE dissolved in groundwater appears stable in size;  The operational efficiency of SVE/GASS system was very low in the Third Quarter 2017, as indicated by the average mass removal rate of 0.0013 lbs/day (a significant decrease from the Second Quarter 2017); and Project Number 1950BK26 December 15, 2017 E2C Remediation 3  Batch pumping results, to date, indicate that batch pumping is a feasible remedy for “polishing” groundwater at the site. Recommendations Based on the above conclusions, E2C recommends the following:  Continue SVE/GASS operations at the site; and  Perform the next quarterly monitoring of groundwater and soil vapor in December 2017. Discussion of Future Activities Activities in the Fourth Quarter 2017 will include groundwater and shallow soil-vapor monitoring in December 2017. Project Number 1950BK26 December 15, 2017 E2C Remediation 4 1.0 INTRODUCTION On behalf of Seven Springs Limited Partnership and Fox Capital Management, E2C Remediation (E2C) is submitting this report documenting groundwater and soil vapor monitoring activities conducted through the Third Quarter 2017 and remedial activities conducted through August 29, 2017 at the Lake Tahoe Laundry Works (LTLW) facility located at 1024 Lake Tahoe Boulevard in South Lake Tahoe, California (Site). On May 27, 2017, the RWQCB issued Cleanup and Abatement Order (CAO) R6T-2017-022 which requires investigation and cleanup of tetrachloroethene (PCE) affected groundwater associated with the Site. The CAO replaces all requirements of previously issued Investigative Orders R6T-2013-0064 (dated August 2, 2013) and R6T-2013-0900 (dated November 1, 2013). CAO R6T-2017-022 requires continued operation of the on-site remediation system and quarterly monitoring and reporting. The regular monitoring and sampling for the Third Quarter 2017 occurred on September 27, 2017. 1.1 Site Description The Site is located approximately 9,000 feet south of Lake Tahoe in the City of South Lake Tahoe, El Dorado County (see Figure 1). The Site is situated in the northwest corner of the South Y Shopping Center, along Lake Tahoe Boulevard between U.S. Highway 50 and Tata Lane and is cross-corner from the dead-end intersection of Glorene Avenue with Lake Tahoe Boulevard (see Figure 2). 1.2 Remedial System Operations All work documented in this report was conducted in accordance with the Remedial Action Plan (RAP) and the Lahontan Regional Water Quality Control Board (LRWQCB) letters, dated November 1, 2013, April 9, 2014, January 4, 2017, February 28, 2017, respectively. The SVE/GASS was operated continuously in the Second and Third Quarters 2017 (through August 29, 2017) with all vapor extraction and air sparge wells operational, with minor shut-downs for maintenance and sampling. During the Third Quarter 2017, there were several momentary power supply issues causing the air compressor to shut down. The air compressor cannot re-start on its own and must be manually re-started. To avoid any future temporary shut downs, in the week of December 4, 2017, E2C began visiting the site 3 times a week so that compressor down-time is minimized. This will continue until it can be established that there is no longer a need for the extra site monitoring or telemetry is installed which would allow remote monitoring of the system. Additionally, E2C will contact representatives of Seven Springs Limited Partnership and Fox Capital Management within 24 hours of discovery that the SVE/GASS is not operating. On August 29, 2017, the system was off due to power supply issue. On August 29, 2017, Aiguo Xu was contacted by the utility purveyor. The call was made to let Aiguo know that the utilities for the “car wash site” were going to be shut down due to non- payment of invoices. Aiguo explained that the site was not a car wash and that there must be some mistake. Project Number 1950BK26 December 15, 2017 E2C Remediation 5 After recognizing that the system was down, accounting personnel from E2C contacted the utility purveyor. They were told that the “car wash” site was shut down due to non-payment of invoices and that the total amount due was approximately $20,000. E2C accounting staff then pulled utility invoices from the file and explained that utility costs for this site averaged only $1,500 per month and would have to have been past due for 13 months to accumulate this total. After several back and forth discussions, the utility provider recognized its mistake, and the power was restored on October 23, 2017 and the machine was re-started on October 24, 2017. Based on laboratory-derived vapor influent concentrations and incremental running time, approximately 936.87 pounds (lbs) of VOC mass have been removed via remediation system operations using the SVE/GASS through August 29, 2017. VOCs were detected at a low concentration of 0.016 parts per million by volume (ppmV) in a vapor sample collected from SVE system influent on July 28, 2017. The average mass removal rate for the Third Quarter 2017 was approximately 0.0013 lbs/day, a significant decline from the Second Quarter 2017. 2.0 THIRD QUARTER 2017 GROUNDWATER MONITORING The Third Quarter 2017 monitoring event was accomplished on September 27, 2017 after the first batch pumping event at monitoring well LW-MW-5S was conducted on September 22, 2017 and on the same day that batch pumping was performed at monitoring well LW-MW-1S. The Third Quarter 2017 monitoring event consisted of (1) Measuring depths to groundwater in both shallow and deep groundwater monitoring wells; and (2) Collecting groundwater samples for chemical analysis from the monitoring wells. 2.1 Groundwater Elevation Monitoring On September 27, 2017, depths to groundwater were measured at all the accessible on-site monitoring wells, as well as the off-site monitoring well OS-1. All the shallow monitoring wells and deeper monitoring wells were accessed for depth to water measurement and groundwater sample collection. During this monitoring event, depths to water were measured from a mark located at the top of each well casing (generally the north side) using a Solinst water level meter and were recorded to the nearest 0.01 foot (see Appendix A for field data sheets). Depths to groundwater from the site wells were used to calculate the groundwater elevation at each well (see Table 1). Groundwater elevation data were used to prepare a Third Quarter 2017 groundwater gradient plots for both the shallow zone aquifer and middle zone aquifer. 2.2 Groundwater Sampling Groundwater purging and sampling were conducted using a low-flow purging and sampling method, except at OS-1, which was purged and sampled using the hand-bailing method. In the low-flow method, groundwater was extracted from the well at a very low rate, approximately 200 to 250 milliliters per minute (mL/min), and drawdown of the water table was stabilized. Water was recovered from the more Project Number 1950BK26 December 15, 2017 E2C Remediation 6 hydro-geologically conductive areas of the water-bearing zone around the well screen, and monitored with water quality sensors for stability to determine chemical change from well water to formation water. Once stabilization occurred, a sample was collected with the assurance of representative formation water and the least amount of geochemical disruption to the sample. During purging, groundwater parameters of temperature, pH, and conductivity were measured as water was purged from a well. Once the parameters stabilized, groundwater in the monitoring well casing was considered representative of formation groundwater and a sample was collected. After purging, dissolved oxygen concentration (in milligrams per liter [mg/L]) and/or oxidation-reduction potential (in millivolts) were also measured and recorded on the field data sheets (see Appendix A for copies of field data sheets). After purging, the low-flow method was also used to fill sample containers, except at OS-1, where a clean disposable bailer was used. Samples were collected into laboratory supplied glassware consisting of three (3) 40-milliliter volatile organic analysis (VOA) vials. Each VOA was sealed using a septum screw cap. Care was taken so that no headspace or bubbles were present in the VOA vials. All samples were labeled and documented on a Chain-of-Custody record immediately after sealing and placed into a cooler with ice for transport to the analytical laboratory. 2.2.1 Chemical Analysis of Groundwater Samples Groundwater samples were analyzed at ProVera Analytical Laboratories, Inc. of Roseville, California (State DHS ELAP-Certification #2606) (ProVera) for the following constituents of concern (COCs) by the appropriate EPA Method (see Appendix B for a copy of the analytical laboratory reports):  Volatile organic compounds (VOCs), including PCE, TCE and associated PCE and TCE degradation products, using EPA Method 8260b; and  The method reporting limit (MRL) for all VOCs in all samples was 0.50 µg/L, except for tertiary-butyl alcohol with an MRL of 5.0 µg/L. 2.2.2 Summary of Groundwater Analytical Results The reported results for samples collected on September 27, 2017 are summarized as follows (see Table 1 for summary of current data and Table 3 for summary of historical data): Site Shallow Zone Aquifer Wells  PCE was reported at four (4) wells at concentrations ranging from 0.96 µg/L (LW-MW-12S) to 43 µg/L (LW-MW-1S) (see Figure 4);  PCE was not reported at or above its MRL of 0.50 µg/L in LW-MW-9S, LW-MW-10SR, LW-MW-11S, and LW-MW-13S (see Figure 4);  TCE was not reported at or above its MRL of 0.50 µg/L in all the shallow wells except at MW-1S with a concentration of 0.51 µg/L (see Figure 5);  Cis-1,2-DCE was not reported at or above its MRL of 0.50 µg/L in all the shallow wells except at MW-1S with a concentration of 0.67 µg/L (see Figure 6);  Chloroform was reported at a concentration of 1.6 µg/L in LW-MW-10SR; and Project Number 1950BK26 December 15, 2017 E2C Remediation 7  All other VOCs were reported as non-detect at all the shallow wells. Off-Site Shallow Zone Aquifer Well OS-1  PCE was reported at a concentration of 1.4 µg/L in the groundwater sample collected from well OS-1; and  All other VOCs were reported as non-detect. Site Middle Zone Aquifer (MZA) Wells  PCE was reported at concentrations of 210 µg/L in LW-MW-1D, 5.6 µg/L in LW-MW-2D, and 1.1 µg/L in LW-MW-5D (Figure 4B);  TCE was reported in LW-MW-1D at a concentration of 4.7 µg/L (Figure 5A);  Cis-1,2-DCE was reported in LW-MW-1D at a concentration of 2.2 µg/L (Figure 6A); and  All other VOCs were reported as non-detect. Section 3.1 discusses analytical results of additional groundwater samples obtained from site shallow zone and MZA monitoring wells in connection with implementing the batch pumping workplan. 2.2.3 Quality Control Samples The duplicate sample from LW-MW-2S was reported to contain concentrations of VOCs that were identical (e.g., not detected) or similar to the primary sample from that well. The laboratory control samples all had recoveries within acceptable ranges. These results indicate that the analytical data are usable and are of adequate quality and reproducibility to satisfy data validity requirements. 2.2.4 Electronic Submittal of Data to GeoTracker Database Groundwater monitoring data (elevation and laboratory) will be uploaded to the State GeoTracker database. A copy of this report will also be uploaded (see Appendix C for copies of recent upload confirmation reports). Any GeoTracker upload not documented in this status report will be documented in the next status report. 2.3 Shallow Soil-Vapor Sampling Shallow soil-vapor samples were collected in accordance with soil-gas monitoring procedures outlined in Appendix E of the IRAWP (copy included as Appendix E). Shallow soil-vapor samples were obtained from all ten (10) VP wells (VP-1 through VP- 10) during the sampling event on September 27, 2017, and on a separate sampling event on November 29, 2017 (See Appendix D for field data sheets). 2.3.1 Summary of Shallow Soil-Vapor Data Analytical data for shallow soil vapor samples collected on September 27, 2017 are summarized below and are presented with historical data in Tables 4A and 4B (see Appendix F for a copy of the soil vapor laboratory report):  PCE was reported at all the ten (10) sampled VP wells at concentrations ranging from 31 parts per billion by volume (ppbV) (454 micrograms per cubic meter Project Number 1950BK26 December 15, 2017 E2C Remediation 8 [µg/m3]) at VP-1 to 1,200,000 ppbV (8,136,000 µg/m3) at VP-2 (see Figure 7A and 7B);  TCE was reported at six VP wells at concentrations ranging from 1.1 ppmV (5.9 µg/m3 at VP-6 to 2,700 ppmV (14,499 µg/m3) at VP-2 (see Table 4A and Figure 7A);  Cis-1,2-DCE was reported at two VP wells at concentrations of 650 ppmV (2,574 µg/m3 at VP-2 and 150 ppmV (594 µg/m3) at VP-5 (see Table 4A);  Trans-1,2-DCE was reported at two VP wells at concentrations of 20 ppmV (79.2 µg/m3 at VP-2 and 35 ppmV (138.6 µg/m3) at VP-5 (see Table 4B);  Vinyl chloride was reported in one VP well with a concentration of 36 ppmV (92.2 µg/m3) at VP-2 (See Table 4B); and  All the other VOCs were not reported at or above their respective method reporting limits (see Tables 4A and 4B). PCE and TCE were analyzed by GC/MS running in the selected ion monitoring (SIM) mode when PCE and/or TCE concentrations are very low. Using this method reliably achieves a conservative method reporting limit (MRL) for Tetrachloroethylene (PCE) of 0.10 parts per billion/volume (ppb/V). 2.4 Discussion of Monitoring Data Groundwater Elevation Monitoring Based on the September 27, 2017, groundwater elevation data in the on-site monitoring wells, shallow groundwater elevations decreased on average by approximately 4.95 feet from May 2017 to September 2017 (see Graph 1). The direction of groundwater flow, in these shallow wells, was generally northwesterly and the average hydraulic gradients were 0.013 to 0.021 ft/ft. The interpreted general flow directions and approximate gradients were similar to those interpreted in previous quarters. Groundwater elevation data collected for the three MZA wells at the site indicated a northerly flow direction. Groundwater elevations in nested monitoring wells show the fine-grained unit beneath the site acts as an aquitard. The large differences in groundwater levels between the shallow zone aquifer and the MZA indicates that the fine-grained unit separating these aquifer zones impedes movement of groundwater from the shallow zone to the middle zone and any associated downward migration of PCE. Vertical groundwater gradients were calculated for shallow- and deep-screened well pairs LW-MW-1S/LW-MW-1D, LW-MW-2S/LW-MW-2D, and LW-MW-5S/LW-MW-5D using the “Vertical Gradient Calculator” tool in the EPA On-line Tools for Site Assessment Calculation: (https://www3.epa.gov/ceampubl/learn2model/part-two/onsite/vgradient.html). This calculation provides a range of possible vertical gradients using varying assumptions about the influence of the well screens. The September 27, 2017 depth to groundwater measurements yielded the following vertical gradient estimates: Project Number 1950BK26 December 15, 2017 E2C Remediation 9 Vertical Gradient Estimates Wells Screen Mid-Point Range of Estimates LW-MW-1S & LW-MW-1D 0.3923 (down) 0.2904-0.6045 (down) LW-MW-2S & LW-MW-2D 0.4820 (down) 0.3140-1.037 (down) LW-MW-5S & LW-MW-5D 0.5967 (down) 0.4314-0.9677 (down) Shallow Zone Aquifer Groundwater Chemical Conditions Monitoring The highest reported PCE concentration in site groundwater (dissolved-phase) this quarter was at LW-MW-1S at a concentration of 43 µg/L. A PCE concentration of 2.9 µg/L was reported at well LW-MW-5S. A PCE concentration of 34 µg/L (duplicate: 31 µg/L was also reported at well LW-MW-2S. PCE concentrations at all other on-site shallow wells have been below 5 µg/L since March 2015. PCE at the site shallow wells decreased from the Second Quarter 2017 to the Third Quarter 2017. A batch pumping event at LW-MW-5S occurred on September 22, 2017, which influenced PCE concentration in this well and possibly PCE concentrations in wells near LW-MW-5S. A PCE concentration of 1.4 µg/L was reported at OS-1 which is below the Maximum Contaminant Level (MCL) of 5 µg/L. PCE was detected at a concentration of 9.6 µg/L in well OS-1 during the Fourth Quarter 2016 sampling event. With the exception of the Fourth Quarter 2016 sampling event, PCE has been detected in well OS-1 at concentrations less than the MCL since June 2016. PCE concentrations in the eastern-most on-site well LW-MW-13S have not been above the MCL since 2010. Prior to June 2016, concentrations of PCE in samples collected from well OS-1 exceeded the MCL. These results were not consistent with the results of sampling the eastern-most on site well MW-13S which has not been above the MCL since 2010. In the Third Quarter 2017, PCE concentrations at LW-MW-9S, LW-MW-10SR, LW-MW-11S, and LW-MW-13S were also reported as non-detect (below its MRL of 0.50 µg/L). The PCE concentration fluctuations at OS-1 do not appear to be correlated to fluctuations observed in groundwater at the on-site monitoring wells. Shallow Soil Vapor Monitoring Average VOC concentration at the shallow soil vapor wells increased substantially from December 2016 to September 2017, but declined in November 2017. The concentrations of VOCs in soil vapor in and around the source area were above the Environmental Screening Levels for soil vapor in a commercial setting developed by the Regional Water Quality Control Board, San Francisco Bay Region (SFRWQCB, 2016). The VOC concentration increases are likely associated with the shutdown of the SVE/GASS system due to a lack of power. Batch pumping events in LW-MW-1S and LW-MW-5S also may have affected subsurface conditions. Power was restored to the SVE/GASS on October 24, 2017. VOC concentrations measured in shallow soil vapor wells during the November 2017 sampling event decreased substantially from the September 2017 sampling event. Accordingly, VOCs in soil vapor are anticipated to continue to decline until concentrations at or below those before the SVE/GASS shutdown occurred are reached. Project Number 1950BK26 December 15, 2017 E2C Remediation 10 MZA Groundwater Chemical Conditions Monitoring PCE was detected in all the three deep wells with the highest reported PCE concentration in LW-MW-1D at 210 µg/L. A PCE concentration of 5.6 µg/L was reported at well LW-MW-2D and 1.1 µg/L at well MW-MW-5D. A concentration of 4.7 µg/L for TCE and a concentration of 2.2 µg/L of cis-1,2-DCE were also reported in LW- MW-1D. PCE and TCE in the middle zone is limited in extent as indicated by the significant concentration decreases from LW-MW-1D to LW-MW-2D and further to LW- MW-5D. 3.0 CURRENT SITE REMEDIATION STATUS Prior to November 1, 2013, site cleanup was conducted under the Interim Remedial Action Plan (IRAP). On November 1, 2013, the RAP was approved by the LRWQCB. Since that date, site cleanup has been conducted in accordance with the approved RAP. As noted above, the CAO replaces the Order dated approving the RAP. Laboratory analytical data were used to estimate the VOC mass removed by SVE/GASS operations during Third Quarters 2017 (see Table 6, Appendices G and H). VOCs were detected at a low concentration of 0.016 ppmV in a vapor sample collected from SVE system influent on July 28, 2017. Mass removal calculations were performed for PCE, TCE and cis-1, 2-DCE individually. Low concentrations of fuel hydrocarbon compounds and other VOCs have also been reported sporadically in influent vapor samples. These compounds have been included in the ‘Total VOC’ category for mass removal calculation purposes. Based on laboratory-derived vapor influent concentrations and incremental running time, approximately 936.87 lbs of VOC mass were removed during SVE/GASS operations from system startup (April 8, 2010) through August 29, 2017 (see Table 6). Approximately 0.08 pounds of VOCs were removed during the Third Quarters 2017 through August 29, 2017. The average mass removal rate for the Third Quarter 2017 was approximately 0.0013 lbs/day which is significantly less than the average mass removal rate for the First and Second Quarter 2017 of approximately 0.089 lbs/day. 3.1 Batch Pumping Events A batch pumping workplan, dated September 8, 2016, was conditionally approved by the LRWQCB in its directive letter dated January 4, 2017. The batch pumping work plan was implemented after the Second Quarter 2017 sampling event, which included sampling remediation wells as a condition prior to performing batch pumping. Weekly batch pumping started on September 22, 2017. Batch pumping from monitoring well LW-MW-1S was performed on September 27, 2017 and on October 11, 17, and 24, 2017. Batch pumping from monitoring well LW-MW-5S was conducted on September 22, 2017 and October 3, 2017. As requested by RWQCB staff, batch pumping has been discontinued to allow completion of an onsite and offsite groundwater investigation that is scheduled for January 2018. As noted above, additional groundwater samples were collected from select groundwater monitoring wells on November 3, 2017. Batch pumping field data and groundwater analytical data summary tables are presented in Appendix I. Batch pumping field data sheets Project Number 1950BK26 December 15, 2017 E2C Remediation 11 are included in Appendix J and laboratory groundwater analytical reports are included in Appendix K. From Table 1 in Appendix J, the following observations can be made:  PCE concentration in LW-MW-1S was 95 µg/L before initiating batch pumping and decreased to 43 µg/L after the first batch pumping event. PCE then increased to 240 µg/L after the second batch pumping event. The concentration remained relatively stable, measuring 260, 210, and 240 µg/L, over the next three batch pumping events, but decreased substantially to 14 µg/L by November 3, 2017 after the sixth and final batch pumping event was completed on October 24, 2017.  No sample was collected from LW-MW-2S in September 2017 before beginning batch pumping. PCE measured 31, 31, and 33 µg/L after four batch pumping events. PCE decreased to 5.2 µg/L after the fifth event, and rose to12 µg/L after the sixth event.  PCE concentration in LW-MW-5S was 10 µg/L before starting batch pumping and decreased to 2.9 µg/L after the first batch pumping event. The concentration remained below the MCL of 5.0 µg/L. PCE was detected at 3.8, 1.8, 1.8, and 1.7 µg/L over the next four ensuing batch pumping events. On November 3, 2017, after the sixth event, PCE was 1.6 µg/L in LW-MW-5S.  No PCE was detected in LW-MW-9S before performing batch pumping and remained so after each batch pumping event.  PCE concentration in LW-MW-11S was 0.6 µg/L before initiating batch pumping. PCE was not detected after three batch pumping events and measured at 0.62 and 0.78 µg/L after two others. No PCE was detected on November 3, 2017 after the last event was performed. Monitoring well LW-MW-1D also was sampled in November 2017 after completing batch pumping. No sample was collected from LW-MW-1D in September 2017 before beginning batch pumping. On September 27, 2017, PCE was detected in LW-MW-1D at 210 µg/L. PCE declined to 7.3 µg/L and all other VOCs were reported as non-detect in the sample collected from LW-MW-1D in November 2017. Based on the above changes in PCE concentrations, batch pumping appears to be effective at polishing groundwater quality at the site and particularly so in the vicinity of the pumped wells. 4.0 CONCLUSIONS Based on the monitoring data collected to date, the following conclusions can be made:  At the time of the Third Quarter 2017 event, site groundwater flow in the shallow zone aquifer is to the northwest at average hydraulic gradients of 0.013 to 0.021 ft/ft; Project Number 1950BK26 December 15, 2017 E2C Remediation 12  Site groundwater elevation in shallow monitoring wells decreased by an average of 4.95 feet from the Second Quarter 2017 to the Third Quarter 2017;  The Third Quarter 2017 groundwater monitoring data indicated PCE concentration was lower in wells LW-MW-1S and LW-MW-5S while PCE concentration in LW-MW-2S was greater compared to Second Quarter 2017 results;  PCE concentration in off-site well OS-1 was below the Maximum Contaminant Level of 5.0 µg/L in the Third Quarter 2017;  Based on a comparison of current results to previous sampling results, the lateral and vertical extent of PCE dissolved in groundwater appears stable;  The operational efficiency of SVE/GASS system was very low in the Third Quarter 2017, as indicated by the average mass removal rate of 0.0013 lbs/day (a significant decrease from the Second Quarter 2017); and  Batch pumping results, to date, indicate that batch pumping is a feasible remedy for “polishing” groundwater at the site. 5.0 RECOMMENDATIONS Based on the above conclusions, E2C recommends the following:  Continue SVE/GASS operations at the site; and  Perform the next quarterly monitoring of groundwater and soil vapor in December 2017. 6.0 FUTURE ACTIVITIES Activities in the Fourth Quarter 2017 will include groundwater and shallow soil-vapor monitoring in December 2017. Project Number 1950BK26 December 15, 2017 E2C Remediation 13 7.0 LIMITATIONS AND CERTIFICATION E2C has performed this investigation in accordance with generally accepted standards of care existing in California at this time. It should be recognized that definition and evaluation of geologic conditions is a difficult and inexact science. Judgments leading to conclusions and recommendations are generally made with limited knowledge of subsurface conditions present. No warranty expressed or implied is made. This Report has been prepared under the professional supervision of the registered professionals whose seals and signatures appear herein. The proposed site monitoring and remediation tasks in this Report are based solely on the Scope of Services outlined and the sources of information referenced in this report. Any additional information that becomes available concerning the Site should be submitted to E2C so that our conclusions may be reviewed and modified, if necessary. This Report was prepared for the sole use of Seven Springs Limited Partnership, Fox Capital Management, and/or their agent(s), the LRWQCB and the CEDEMD. Prepared By: Reviewed By: Aiguo Xu, Ph.D. Principal Engineer C.E. # 72685 Philip Goalwin, P.G. #4779 Principal Geologist Project Number 1950BK26 December 15, 2017 E2C Remediation 14 8.0 REFERENCES (LRWQCB, 2009) California Regional Water Quality Control Board, Lahontan Region, April 8, 2009, Acceptance of Interim Remedial Action Workplan and Addendum, Lake Tahoe Laundry Works, 1024 Lake Tahoe Boulevard, South Lake Tahoe, El Dorado County. (E2C, 2008) E2C Remediation, September 22, 2008, Site Investigation Report of Findings, Lake Tahoe Laundry Works, 1024 Lake Tahoe Boulevard, South Lake Tahoe. (E2C, 2009A) E2C Remediation, June 4, 2009, Interim Remedial Action Workplan for SZA Groundwater Investigation, SZA Groundwater Monitoring, Interim Remedial Action Vadose Zone Soil and Shallow Groundwater Cleanup, Lake Tahoe Laundry Works, 1024 Lake Tahoe Boulevard, South Lake Tahoe. (E2C, 2009B) E2C Remediation, August 26, 2009, Amendment to Interim Remedial Action Workplan for SZA Groundwater Investigation, SZA Groundwater Monitoring, Interim Remedial Action Vadose Zone Soil and Shallow Groundwater Cleanup, Lake Tahoe Laundry Works, 1024 Lake Tahoe Boulevard, South Lake Tahoe. (E2C, 2010) E2C Remediation, August 12, 2010, Interim Remedial System Installation/Pilot Testing Report of Findings and Draft Remedial Action Plan for Vadose Zone Soil and Shallow Groundwater Cleanup, Lake Tahoe Laundry Works, 1024 Lake Tahoe Boulevard, South Lake Tahoe, California. (PES, 2003) PES Environmental, Inc. November 17, 2003, Groundwater Investigation Results, Lake Tahoe Laundry Works, 1024 Lake Tahoe Boulevard, South Lake Tahoe, California. (PES, 2004a) PES Environmental, Inc. October 13, 2004, Supplemental Site Investigation Results, Lake Tahoe Laundry Works, 1024 Lake Tahoe Boulevard, South Lake Tahoe, California. (PES, 2005) PES Environmental, Inc. Draft, 2005, Additional Site Investigation Results, Lake Tahoe Laundry Works, 1024 Lake Tahoe Boulevard, South Lake Tahoe, California. (PES, 2006) PES Environmental, Inc. January 31, 2006, Additional Soil Investigation Results, Lake Tahoe Laundry Works, 1024 Lake Tahoe Boulevard, South Lake Tahoe, California, RWQCB SLIC Case No. T6S043. Project Number 1950BK26 December 15, 2017 E2C Remediation Figures FIGURES Figure 1 Site Location Map Figure 2 Site Plan Figure 3 Third Quarter 2017 Groundwater Gradient Plot (Shallow Zone) Figure 3A Third Quarter 2017 Groundwater Gradient Plot (Middle Zone) Figure 4 Third Quarter 2017 Dissolved-Phase PCE Distribution Plot (Shallow Zone) Figure 4A Third Quarter 2017 Dissolved-Phase PCE 5 µg/L Boundary Plot (Shallow Zone) Figure 4B Third Quarter 2017 Dissolved-Phase PCE Distribution Plot (Middle Zone) Figure 5 Third Quarter 2017 Dissolved-Phase TCE Distribution Plot (Shallow Zone) Figure 5A Third Quarter 2017 Dissolved-Phase TCE Distribution Plot (Middle Zone) Figure 6 Third Quarter 2017 Dissolved-Phase cis-1, 2-DCE Distribution Plot (Shallow Zone) Figure 7A Third Quarter 2017 Shallow Soil Vapor Distribution Plot Figure 7B Third Quarter 2017 Shallow Soil Vapor PCE Distribution Plot Figure 7C November 29 2017 Shallow Soil Vapor Distribution Plot Figure 7D November 29, 2017 Shallow Soil Vapor PCE Distribution Plot Figure 8 Remediation Well Location Plot FIGURE 1 SITE SITE LOCATION MAP LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 FIGURE2LAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIANOT TO SCALESITE PLANLW-MW-1SLEGENDApproximate Location ofGroundwater Monitoring WellLW-MW-12SLW-MW-1SLW-MW-2SLW-MW-5SLW-MW-9SLW-MW-11SLW-MW-13SOS-1LW-MW-10SRN1020 Winding Creek Rd., #110, Roseville, CA 95678Phone: (916) 782-8700 Fax: (916) 782-8750 LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 3THIRD QUARTER 2017 GROUNDWATER GRADIENT PLOT L A K E T A H O E B O U L E V A R DGLORENE AVENUERALEYS LTLW LEGEND SZA Groundwater Monitoring Well LW-MW-1S 0 FT 50 FT N Groundwater Elevation (feet, NAVD 88) 6,1 7 8 . 0 0 Groundwater Isocontour (feet); queried where unknown 6,178.92 Groundwater Flow Direction; average flow gradient indicated LW-MW-2S LW-MW-5S LW-MW-11S LW-MW-1SLW-MW-12S LW-MW-10SR LW-MW-13S LW-MW-9S 6,183.43 6,181.21 6183.51 6,182.25 (NH) 6,183.62 6182.89 6,182.61 LW-MW-10S 6,184.22 ? ? ? 6,182.0 ? 6,183. 0 ? 6,184. 0 ?Avg. Grad ient = 0 .021 ft /ft NM Not monitored 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Avg. G rad ien t = 0 .013 f t / f t NH Not Honored LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 3ATHIRD QUARTER 2017 GROUNDWATER GRADIENT PLOT (INTERMEDIATE ZONE) L A K E T A H O E B O U L E V A R DGLORENE AVENUERALEYS LTLW LEGEND IZA Groundwater Monitoring Well LW-MW-1D 0 FT 50 FT N Groundwater Elevation (feet, NAVD 88) 6,1 7 8 . 0 0 Groundwater Isocontour (feet); queried where unknown 6,178.92 Groundwater Flow Direction; average flow gradient indicated LW-MW-2D LW-MW-5D LW-MW-1D 6,176.42 6,175.55 6,172.80??6,173.0 ? ?6,174.0? 6,175.0 ?6,176.0 ?Avg. Gradient = 0.036 ft/ftNM Not monitored 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 NH Not Honored LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 4THIRD QUARTER 2017 DISSOLVED-PHASE PCE DISTRIBUTION PLOT L A K E T A H O E B O U L E VA R DGLORENE AVENUERALEYS LTLW LEGEND SZA Groundwater Monitoring Well LW-MW-1S 0 FT 50 FT N Tetrachloroethene (PCE) Concentration (µg/L) 56 Not detected at or above Method Reporting Limit ND LW-MW-9S LW-MW-11S LW-MW-5S LW-MW-2S LW-MW-1SLW-MW-12S LW-MW-10SR LW-MW-13S ND<0.50 34 43 ND<0.50 ND<0.50 2.9 ND<0.50 0.96 Duplicate: 31 ?5 µg/L1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 NS Not Sampled0.5 µg/L0. 5 g/ L µ?? TRANSIT STATION L A K E T A H O E B O U L E VA R DGLORENE AVENUERALEYS LTLW LEGEND SZA Groundwater Monitoring Well LW-MW-1S 0 FT 50 FT N Tetrachloroethene (PCE) Concentration (µg/L) 56 Not detected at or above Method Reporting Limit ND LW-MW-9S LW-MW-11S LW-MW-5S LW-MW-2S LW-MW-1SLW-MW-12S LW-MW-10SR LW-MW-13S ND<0.50 34 43 ND<0.50 ND<0.50 2.9 ND<0.50 0.96 Duplicate: 31 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 NS Not Sampled LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA FIGURE 4ATHIRD QUARTER 2017 DISSOLVED-PHASE PCE 5 µg/L BOUNDARY PLOT LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 4B THIRD QUARTER 2017 DISSOLVED-PHASE PCE DISTRIBUTION PLOT LW-MW-1D LW-MW-2D LW-MW-5D L A K E T A H O E B O U L E VA R DGLORENE AVENUERALEYS LTLW LEGEND IZA Groundwater Monitoring Well LW-MW-1D 0 FT 50 FT N Tetrachloroethene (PCE) Concentration (µg/L) 56 Not detected at or above Method Reporting Limit ND 5.6 210 1.1 5 µg/L?50 µg/L 0.5 µg/L??0.5 µg/L 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 NS Not Sampled (INTERMEDIATE ZONE) LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 5THIRD QUARTER 2017 DISSOLVED-PHASE TCE DISTRIBUTION PLOT 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 L A K E T A H O E B O U L E VA R DGLORENE AVENUERALEYS LTLW 0 FT 50 FT N LEGEND SZA Groundwater Monitoring Well LW-MW-1S Trichloroethene (TCE) Concentration (g/L)µ 2.7 Not SampledNS Not detected at or above Method Reporting Limit ND LW-MW-1S LW-MW-9S LW-MW-11S LW-MW-5S LW-MW-2S LW-MW-12S LW-MW-10SR LW-MW-13S ND<0.50 ND<0.50 0.51 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 0.5 µg/L? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 5A THIRD QUARTER 2017 DISSOLVED-PHASE TCE DISTRIBUTION PLOT1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 (INTERMEDIATE ZONE) LW-MW-1D LW-MW-2D LW-MW-5D L A K E T A H O E B O U L E VA R DGLORENE AVENUERALEYS LTLW 0 FT 50 FT N LEGEND IZA Groundwater Monitoring Well LW-MW-1D Trichloroethene (TCE) Concentration (g/L)µ 2.7 Not SampledNS Not detected at or above Method Reporting Limit ND ND<0.50 4.7 ND<0.50 0.5 µg/L? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 6THIRD QUARTER 2017 DISSOLVED-PHASE cis-1,2-DCE DISTRIBUTION PLOT 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 LW-MW-1S L A K E T A H O E B O U L E VA R DGLORENE AVENUERALEYS LTLW 0 FT 50 FT N LEGEND SZA Groundwater Monitoring Well LW-MW-1S cis-1,2-Dichloroethene (cis-1,2-DCE) Concentration (g/L)µ1.13 NS Not detected at or above Method Reporting Limit ND Not Sampled LW-MW-11SLW-MW-9S LW-MW-5S LW-MW-2S LW-MW-12S LW-MW-10SR LW-MW-13S ND<0.50 ND<0.50 0.67 ND<0.50 ND<0.50 ND<0.50 ND<0.50 ND<0.50 Duplicate: ND<0.50 ?0. 5 µg/ L LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 6A THIRD QUARTER 2017 DISSOLVED-PHASE Cis-1,2-DCE DISTRIBUTION PLOT1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 (INTERMEDIATE ZONE) LW-MW-1D LW-MW-2D LW-MW-5D L A K E T A H O E B O U L E VA R DGLORENE AVENUERALEYS LTLW 0 FT 50 FT N LEGEND SZA Groundwater Monitoring Well LW-MW-1S cis-1,2-Dichloroethene (cis-1,2-DCE) Concentration (g/L)µ1.13 NS Not detected at or above Method Reporting Limit ND Not Sampled ND<0.50 2.2 ND<0.50 0.5 µg/L? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 7ATHIRD QUARTER 2017 SHALLOW SOIL VAPOR DISTRIBUTION PLOT L A K E T A H O E B O U L E V A R DGLORENE AVENUERALEYS LTLW LW-MW-1S 0 FT 50 FT N LEGEND SZA Groundwater Monitoring Well LW-MW-2S LW-MW-5S LW-MW-11S LW-MW-1SLW-MW-12S LW-MW-10SR LW-MW-13S LW-MW-9S VP-1 VP-2 VP-3 VP-4 VP-5 VP-6 VP-7 VP-10 VP-8 VP-9 VP-10 Vapor Sampling Point PCE = 7.8 ppbV TCE = nd<10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 67 TCE = nd<0.10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 31 TCE = nd<0.10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 3,900 TCE = 27 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 1,300 TCE = 3.9 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 130 TCE = nd<0.10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 260 TCE = 0.89 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 1,000 TCE = 29 cis-1,2-DCE =150 Other VOCs = 35 PCE = 790 TCE = 1.1 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 580 TCE = nd<0.10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 Tetrachloroethylene, Trichloroethylene, cis-1,2-Dichloroethene, and Other VOCs; Soil Vapor Concentration in parts per billion by volume NS Not sampled All results in ppbV PCE and TCE results-SIM method (low detection limit) 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 PCE = 1,200,000 TCE = 2,700 cis-1,2-DCE =650 Other VOCs = 56 LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 7BTHIRD QUARTER 2017 SHALLOW SOIL VAPOR PCE DISTRIBUTION PLOT L A K E T A H O E B O U L E V A R DGLORENE AVENUERALEYS LTLW LW-MW-1S 0 FT 50 FT N LEGEND SZA Groundwater Monitoring Well Tetrachloroethylene Soil-Vapor Concentration in micro-grams per cubic meter (g/m^3)µ 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Not SampledNS 2,100 LW-MW-2S LW-MW-5S LW-MW-11S LW-MW-1SLW-MW-12S LW-MW-10S LW-MW-13S LW-MW-9S VP-1 VP-2 VP-3 VP-4 VP-5 VP-6 VP-7 VP-10 VP-8 VP-9 VP-10 Vapor Sampling Point 298 6,780 881 454 210 5,356 3,9328,136,000 26,442 8,814 1,763 Tetrachloroethylene Soil-Vapor Isoconcentration line Tetrachloroethylene Soil-Vapor Isoconcentration line at Environmental Screening Level 1,000 1,000 100 100 ? ? ? ? 1.0 1.0 5,000 5,0 0 0 2,100 ?? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 7CNOVEMBER 29, 2017 SHALLOW SOIL VAPOR DISTRIBUTION PLOT L A K E T A H O E B O U L E V A R DGLORENE AVENUERALEYS LTLW LW-MW-1S 0 FT 50 FT N LEGEND SZA Groundwater Monitoring Well LW-MW-2S LW-MW-5S LW-MW-11S LW-MW-1SLW-MW-12S LW-MW-10SR LW-MW-13S LW-MW-9S VP-1 VP-2 VP-3 VP-4 VP-5 VP-6 VP-7 VP-10 VP-8 VP-9 VP-10 Vapor Sampling Point PCE = 7.8 ppbV TCE = nd<10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 210 TCE = nd<10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 120 TCE = nd<10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 11,000 TCE = 400 cis-1,2-DCE = 160 Other VOCs = nd<10 PCE = 190 TCE = nd<10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 46 TCE = nd<10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 46 TCE = nd<10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 550 TCE = nd<10 cis-1,2-DCE =92 Other VOCs = 12 PCE = 340 TCE = nd<10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 PCE = 170 TCE = nd<10 cis-1,2-DCE = nd<10 Other VOCs = nd<10 Tetrachloroethylene, Trichloroethylene, cis-1,2-Dichloroethene, and Other VOCs; Soil Vapor Concentration in parts per billion by volume NS Not sampled All results in ppbV 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 PCE = 370,000 TCE = 3,200 cis-1,2-DCE =1,100 Other VOCs = 18 LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 7dNOVEMBER 29, 2017 SHALLOW SOIL VAPOR PCE DISTRIBUTION PLOT L A K E T A H O E B O U L E V A R DGLORENE AVENUERALEYS LTLW LW-MW-1S 0 FT 50 FT N LEGEND SZA Groundwater Monitoring Well Tetrachloroethylene Soil-Vapor Concentration in micro-grams per cubic meter (g/m^3)µ 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Not SampledNS 2,100 LW-MW-2S LW-MW-5S LW-MW-11S LW-MW-1SLW-MW-12S LW-MW-10S LW-MW-13S LW-MW-9S VP-1 VP-2 VP-3 VP-4 VP-5 VP-6 VP-7 VP-10 VP-8 VP-9 VP-10 Vapor Sampling Point 298 3,729 312 1,424 814 2,305 1,1532,508,600 74,580 1,288 312 Tetrachloroethylene Soil-Vapor Isoconcentration line Tetrachloroethylene Soil-Vapor Isoconcentration line at Environmental Screening Level 1, 0 0 0 1,000 100 100 ? ? ? ? 1.0 1.0 5 , 0 0 0 5,00 0 2 , 1 0 0 ?? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA TRANSIT STATION FIGURE 8REMEDIATION WELL LOCATION PLOT L A K E T A H O E B O U L E V A R DGLORENE AVENUERALEYS LTLW LEGEND Groundwater Monitoring Well LW-MW-1S 0 FT 50 FT N LW-MW-5S LW-MW-1S LW-MW-5S LW-MW-2S LW-MW-11S LW-MW-13S LW-MW-9S LW-MW-10S LW-MW-12S VP-1 VP-2 VP-3 VP-4 VP-5 VP-6 VP-7 VP-10 VP-8 VP-9 Soil-Gas Vapor Sampling Point VE-1 VE-12 VE-13 VE-2 VE-19 VE-20 VE-18 VE-17 VE-16 VE-6 VE-7VE-10 VE-9 VE-15 VE-8 VE-14 VE-3 VE-5 VE-4 VE-11 VE-1 SVE Well Location AS-1 AS-2 AS-3 AS-4 AS-5 AS-10 AS-8 AS-16 AS-11 AS-7 AS-13 AS-6 AS-20 AS-9 AS-15 AS-12 AS-14 AS-19 AS-21 AS-18 AS-22 AS-17 AS-23 AS-24 AS-25 AS-1 AS Well Location AS-26 AS-27 Horizontal SVE Well Locations (southern trench - 4 30’ HVE/northern trench 3 30’ HVE) VP-10 1020 Winding Creek Rd., #110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Project Number 1950BK26 December 15, 2017 E2C Remediation Tables TABLES Table 1 Summary of Third Quarter 2017 Groundwater Monitoring Data Table 2 Summary of Historical Groundwater Elevation Data Table 3 Summary of Historical Groundwater Analytical Data Table 4A Summary of Historical VP Shallow Soil-Gas Analytical Data Table 4B Summary of Historical VP Shallow Soil-Gas Analytical Data – Other VOCs Table 5 Summary of Well Construction Details Table 6 Summary of SVE/GASS Remediation System Operational Data Table 7 Summary of VE Wellfield Data Table 8 Summary of Historical Interim Remedial System Vapor Laboratory Analytical Data Project Number: 1950BK26 December 15, 2017 TOC Elev.Depth to GW GW Elevation PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA CF BDCM B EB MtBE (feet rel MSL)(feet BTOC)(feet MSL) LW-MW-1S 6,191.41 7.98 6,183.43 43 0.51 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.67 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-2S 6,192.41 11.20 6,181.21 34 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 Duplicate LW-MW-14S: Duplicate of LW-MW-2S 31 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-5S 6,189.47 6.86 6,182.61 2.9 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-9S 6,192.98 9.47 6,183.51 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-10SR 6,191.91 7.69 6,184.22 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 1.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-11S 6,191.67 9.42 6,182.25 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-12S 6,190.71 7.09 6,183.62 0.96 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-13S 6,190.82 7.93 6,182.89 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 OS-1 6,188.12 8.42 6,179.70 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-1D 6,191.36 14.94 6,176.42 210 4.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-2D 6,192.35 16.80 6,175.55 5.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-5D 6,189.31 16.51 6,172.80 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 Notes: Results in micrograms per liter (µg/L) (equivalent to parts per billion, ppb) 1,1-DCA = 1,1,-Dichloroethane 1,1-DCE = 1,2-Dichloroethene 1,1,1-TCA = 1,1,1-Trichlorethane 1,1,1,2-Tetra = 1,1,1,2-TetrachloroethaneB = Benzene BDCM - Bromodichloromethane BTOC = Below Top of Casing CA = Chloroethane CB = Chlorobenzene CF = Chloroform cis-1,2-DCE = cis-1,2-Dichloroethene EB = Ethlybenzene MC = Methylene Chloride MtBE = Methyl tertiary-butyl ether nd< = Not detected at or above the Method Detection Limit, which is indicated by the value nm = Not monitoredPCE = Tetrachloroethene (a.k.a. perchloroethene) TCE = Trichloroethene trans-1,2-DCE = trans-1,2-Dichloroethene VC = Vinyl Chloride LW-MW-14s is the duplicate of LW-MW-2S on Chain-of-Custody Deep Wells Well ID TABLE 1 SUMMARY OF SECOND QUARTER 2017 GROUNDWATER MONITORING DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard South Lake Tahoe, California September 27, 2017 (µg/L) E2C Remediation Table 1-1 Project Number: 1950BK26 December 15, 2017 TABLE 2 SUMMARY OF HISTORICAL GROUNDWATER ELEVATION DATA Lake Tahoe Laundry Works South Lake Tahoe, California Reference Total Well Depth to Groundwater GW Elevation Elevation Depth Groundwater Elevation Change (feet MSL)(feet BTOC)(feet BTOC)(feet MSL)(feet) 08/13/08 ---13.69 6,177.72 --- 12/04/09 23.91 15.09 6,176.32 -1.40 03/23/10 23.90 13.99 6,177.42 1.10 06/15/10 23.90 11.16 6,180.25 2.83 09/08/10 23.90 12.73 6,178.68 -1.57 12/16/10 23.90 12.49 6,178.92 0.24 05/11/11 23.90 5.08 6,186.33 7.41 09/29/11 23.90 10.71 6,180.70 -5.63 12/09/11 23.90 10.16 6,181.25 0.55 03/29/12 23.90 9.03 6,182.38 1.13 06/08/12 23.90 10.75 6,180.66 -1.72 08/21/12 23.90 12.19 6,179.22 -1.44 11/19/12 23.90 13.66 6,177.75 -1.47 03/11/13 23.90 10.18 6,181.23 3.48 07/30/13 23.90 11.27 6,180.14 -1.09 09/30/13 23.90 12.31 6,179.10 -1.04 12/10/13 23.90 13.91 6,177.50 -1.60 03/06/14 23.90 14.14 6,177.27 -0.23 06/26/14 23.90 12.30 6,179.11 1.84 09/17/14 23.90 14.36 6,177.05 -2.06 12/16/14 23.90 13.58 6,177.83 0.78 03/26/15 23.90 13.84 6,177.57 -0.26 06/12/15 23.90 13.05 6,178.36 0.79 09/11/15 23.90 15.00 6,176.41 -1.95 12/18/15 23.90 15.77 6,175.64 -0.77 03/25/16 23.90 11.92 6,179.49 3.85 06/21/16 23.90 10.66 6,180.75 1.26 09/28/16 23.90 13.18 6,178.23 -2.52 12/20/16 23.90 12.23 6,179.18 0.95 05/02/17 23.90 3.08 6,188.33 9.15 09/27/17 23.90 7.98 6,183.43 -4.90 05/02/17 ---10.31 6,181.05 --- 09/27/17 40.21 14.94 6,176.42 -4.63 08/13/08 ---14.99 6,177.42 --- 12/04/09 34.82 17.29 6,175.12 -2.30 03/23/10 34.85 15.44 6,176.97 1.85 06/15/10 34.85 13.21 6,179.20 2.23 09/08/10 34.85 14.85 6,177.56 -1.64 12/16/10 34.85 14.11 6,178.30 0.74 05/11/11 34.85 7.41 6,185.00 6.70 09/29/11 34.85 11.76 6,180.65 -4.35 12/09/11 34.85 12.63 6,179.78 -0.87 03/29/12 34.85 11.85 6,180.56 0.78 06/08/12 34.85 12.73 6,179.68 -0.88 08/21/12 34.85 13.64 6,178.77 -0.91 11/19/12 34.85 14.97 6,177.44 -1.33 03/11/13 34.85 12.84 6,179.57 2.13 07/30/13 34.85 14.32 6,178.09 -1.48 09/30/13 34.85 15.11 6,177.30 -0.79 12/10/13 34.85 16.52 6,175.89 -1.41 03/06/14 34.85 15.94 6,176.47 0.58 06/26/14 34.85 15.4 6,177.01 0.54 09/17/14 34.85 16.88 6,175.53 -1.48 12/16/14 34.85 16.89 6,175.52 -0.01 03/26/15 34.85 17.05 6,175.36 -0.16 06/12/15 34.85 16.87 6,175.54 0.18 09/11/15 34.85 17.91 6,174.50 -1.04 12/18/15 34.85 18.59 6,173.82 -0.68 03/25/16 34.85 14.74 6,177.67 3.85 06/21/16 34.85 13.92 6,178.49 0.82 09/28/16 34.85 15.94 6,176.47 -2.02 12/20/16 34.85 15.02 6,177.39 0.92 05/02/17 34.85 6.32 6,186.09 8.70 09/27/17 34.85 11.2 6,181.21 -4.88 6,192.41 LW-MW-1D 6,191.36 1024 Lake Tahoe Boulevard DateWell ID LW-MW-1S 6,191.41 LW-MW-2S E 2C Remediation Table 2-1 Project Number: 1950BK26 December 15, 2017 TABLE 2 SUMMARY OF HISTORICAL GROUNDWATER ELEVATION DATA Lake Tahoe Laundry Works South Lake Tahoe, California Reference Total Well Depth to Groundwater GW Elevation Elevation Depth Groundwater Elevation Change (feet MSL)(feet BTOC)(feet BTOC)(feet MSL)(feet) 1024 Lake Tahoe Boulevard DateWell ID LW-MW-1S 6,191.41 05/02/17 49.93 12.53 6,179.82 --- 09/27/17 49.93 16.80 6,175.55 -4.27 08/13/08 ---14.04 6,175.43 --- 12/04/09 29.73 14.85 6,174.62 -0.81 03/23/10 29.73 14.21 6,175.26 0.64 06/15/10 29.73 9.75 6,179.72 4.46 09/08/10 29.73 12.06 6,177.41 -2.31 12/16/10 29.73 nm 05/11/11 29.73 4.75 6,184.72 09/29/11 29.73 9.21 6,180.26 -4.46 12/09/11 29.73 8.94 6,180.53 0.27 03/29/12 29.73 7.94 6,181.53 1.00 06/08/12 29.73 8.84 6,180.63 -0.90 08/21/12 29.73 11.84 6,177.63 -3.00 11/19/12 29.73 15.25 6,174.22 -3.41 03/11/13 29.73 9.25 6,180.22 6.00 07/30/13 29.73 10.22 6,179.25 -0.97 09/30/13 29.73 11.36 6,178.11 -1.14 12/10/13 29.73 14.32 6,175.15 -2.96 03/06/14 29.73 12.93 6,176.54 1.39 06/26/14 29.73 11.27 6,178.20 1.66 09/17/14 29.73 12.73 6,176.74 -1.46 12/16/14 29.73 12.89 6,176.58 -0.16 03/26/15 29.73 12.63 6,176.84 0.26 06/12/15 29.73 11.78 6,177.69 0.85 09/11/15 29.73 13.91 6,175.56 -2.13 12/18/15 29.73 14.31 6,175.16 -0.40 03/25/16 29.73 10.65 6,178.82 3.66 06/21/16 29.73 9.54 6,179.93 1.11 09/28/16 29.73 12.31 6,177.16 -2.77 12/20/16 29.73 11.05 6,178.42 1.26 05/02/17 29.73 2.12 6,187.35 8.93 09/27/17 29.73 6.86 6,182.61 -4.74 05/02/17 49.45 12.58 6,176.73 --- 09/27/17 49.45 16.51 6,172.80 -3.93 6,189.47LW-MW-5S LW-MW-2D 6,192.35 LW-MW-5D 6,189.31 E 2C Remediation Table 2-2 Project Number: 1950BK26 December 15, 2017 TABLE 2 SUMMARY OF HISTORICAL GROUNDWATER ELEVATION DATA Lake Tahoe Laundry Works South Lake Tahoe, California Reference Total Well Depth to Groundwater GW Elevation Elevation Depth Groundwater Elevation Change (feet MSL)(feet BTOC)(feet BTOC)(feet MSL)(feet) 1024 Lake Tahoe Boulevard DateWell ID LW-MW-1S 6,191.41 12/04/09 24.40 16.01 6,176.97 --- 03/23/10 24.25 14.82 6,178.16 1.19 06/15/10 24.25 12.29 6,180.69 2.53 09/08/10 24.25 13.91 6,179.07 -1.62 12/16/10 24.25 14.75 6,178.23 -0.84 05/11/11 24.25 6.37 6,186.61 8.38 09/29/11 24.25 12.51 6,180.47 -6.14 12/09/11 24.25 11.57 6,181.41 0.94 03/29/12 24.25 10.68 6,182.30 0.89 06/08/12 24.25 12.76 6,180.22 -2.08 08/21/12 24.25 13.92 6,179.06 -1.16 11/19/12 24.25 15.26 6,177.72 -1.34 03/11/13 24.25 11.66 6,181.32 3.60 07/30/13 24.25 12.69 6,180.29 -1.03 09/30/13 24.25 13.75 6,179.23 -1.06 12/10/13 24.25 17.23 6,175.75 -3.48 03/06/14 24.25 16.80 6,176.18 0.43 06/26/14 24.25 13.73 6,179.25 3.07 09/17/14 24.25 12.40 6,180.58 1.33 12/16/14 24.25 15.46 6,177.52 -3.06 03/26/15 24.25 13.22 6,179.76 2.24 06/12/15 24.25 7.29 6,185.69 5.93 09/11/15 24.25 16.57 6,176.41 -9.28 12/18/15 03/25/16 24.25 13.42 6,179.56 --- 06/21/16 24.25 12.18 6,180.80 1.24 09/28/16 24.25 15.91 6,177.07 -3.73 12/20/16 24.25 11.01 6,181.97 4.90 05/02/17 24.25 4.55 6,188.43 6.46 09/27/17 24.25 9.47 6,183.51 -4.92 12/04/09 24.76 14.30 6,177.85 --- 03/23/10 24.60 13.27 6,178.88 1.03 06/15/10 24.60 10.55 6,181.60 2.72 09/08/10 24.60 12.13 6,180.02 -1.58 12/16/10 24.60 11.07 6,181.08 1.06 05/11/11 24.60 4.41 6,187.74 6.66 09/29/11 24.60 9.20 6,182.95 -4.79 12/09/11 24.60 9.80 6,182.35 -0.60 03/29/12 24.60 9.02 6,183.13 0.78 06/08/12 24.60 9.43 6,182.72 -0.41 08/21/12 24.60 10.45 6,181.70 -1.02 11/19/12 LW-MW-9S Inaccessible-covered by snow 6,192.15LW-MW-10S Well Grouted Up on Arrival/Unaccessible 6,192.98 E 2C Remediation Table 2-3 Project Number: 1950BK26 December 15, 2017 TABLE 2 SUMMARY OF HISTORICAL GROUNDWATER ELEVATION DATA Lake Tahoe Laundry Works South Lake Tahoe, California Reference Total Well Depth to Groundwater GW Elevation Elevation Depth Groundwater Elevation Change (feet MSL)(feet BTOC)(feet BTOC)(feet MSL)(feet) 1024 Lake Tahoe Boulevard DateWell ID LW-MW-1S 6,191.41 07/30/13 24.65 11.73 6,180.18 --- 09/30/13 24.65 11.95 6,179.96 -0.22 12/10/13 24.65 13.40 6,178.51 -1.45 03/06/14 24.65 13.21 6,178.70 0.19 06/26/14 24.65 11.99 6,179.92 1.22 09/17/14 24.65 13.61 6,178.30 -1.62 12/16/14 24.65 14.78 6,177.13 -1.17 03/26/15 24.65 13.75 6,178.16 1.03 06/12/15 24.65 12.99 6,178.92 0.76 09/11/15 24.65 14.82 6,177.09 -1.83 12/18/15 24.65 16.58 6,175.33 -1.76 03/25/16 24.65 11.95 6,179.96 4.63 06/21/16 24.65 10.39 6,181.52 1.56 09/28/16 24.65 12.83 6,179.08 -2.44 12/20/16 24.65 12.05 6,179.86 0.78 05/02/17 24.65 2.60 6,189.31 9.45 09/27/17 24.65 7.69 6,184.22 -5.09 12/04/09 24.30 14.91 6,176.76 --- 03/23/10 24.02 14.72 6,176.95 0.19 06/15/10 24.02 11.38 6,180.29 3.34 09/08/10 24.02 12.87 6,178.80 -1.49 12/16/10 24.02 14.95 6,176.72 -2.08 05/11/11 24.02 5.40 6,186.27 9.55 09/29/11 24.02 10.25 6,181.42 -4.85 12/09/11 24.02 10.61 6,181.06 -0.36 03/29/12 24.02 9.79 6,181.88 0.82 06/08/12 24.02 10.52 6,181.15 -0.73 08/21/12 24.02 11.06 6,180.61 -0.54 11/19/12 24.02 13.03 6,178.64 -1.97 03/11/13 24.02 11.84 6,179.83 1.19 07/30/13 24.02 11.74 6,179.93 0.10 09/30/13 24.02 12.85 6,178.82 -1.11 12/10/13 24.02 14.59 6,177.08 -1.74 03/06/14 24.02 14.01 6,177.66 0.58 06/26/14 24.02 12.80 6,178.87 1.21 09/17/14 24.02 14.31 6,177.36 -1.51 12/16/14 24.02 14.62 6,177.05 -0.31 03/26/15 06/12/15 24.02 13.97 6,177.70 09/11/15 24.02 15.69 6,175.98 -1.72 12/18/15 24.02 16.59 6,175.08 -0.90 03/25/16 24.02 12.44 6,179.23 4.15 06/21/16 24.02 11.36 6,180.31 1.08 09/28/16 24.02 14.92 6,176.75 -3.56 12/20/16 24.02 11.40 6,180.27 3.52 05/02/17 24.02 3.51 6,188.16 7.89 09/27/17 24.02 9.42 6,182.25 -5.91 6,191.91 LW-MW-11S nm - unable to monitor 6,191.67 LW-MW-10SR E 2C Remediation Table 2-4 Project Number: 1950BK26 December 15, 2017 TABLE 2 SUMMARY OF HISTORICAL GROUNDWATER ELEVATION DATA Lake Tahoe Laundry Works South Lake Tahoe, California Reference Total Well Depth to Groundwater GW Elevation Elevation Depth Groundwater Elevation Change (feet MSL)(feet BTOC)(feet BTOC)(feet MSL)(feet) 1024 Lake Tahoe Boulevard DateWell ID LW-MW-1S 6,191.41 12/04/09 24.20 15.00 6,175.71 --- 03/23/10 23.80 13.36 6,177.35 1.64 06/15/10 23.80 9.99 6,180.72 3.37 09/08/10 23.80 11.57 6,179.14 -1.58 12/16/10 23.80 nm 05/11/11 23.80 4.07 6,186.64 09/29/11 23.80 10.75 6,179.96 -6.68 12/09/11 23.80 9.15 6,181.56 1.60 03/29/12 nm nm 06/08/12 23.80 9.51 6,181.20 08/21/12 23.80 9.37 6,181.34 0.14 11/19/12 23.80 11.31 6,179.40 -1.94 03/11/13 nm nm 07/30/13 23.80 10.31 6,180.40 09/30/13 23.80 11.32 6,179.39 -1.01 12/10/13 03/06/14 23.80 12.57 6,178.14 --- 06/26/14 23.80 11.32 6,179.39 1.25 09/17/14 23.80 13.05 6,177.66 -1.73 12/16/14 23.80 12.96 6,177.75 0.09 03/26/15 23.80 13.00 6,177.71 -0.04 06/12/15 23.80 12.50 6,178.21 0.50 09/11/15 23.80 14.04 6,176.67 -1.54 12/18/15 03/25/16 23.80 11.08 6,179.63 --- 06/21/16 23.80 9.72 6,180.99 1.36 09/28/16 23.80 12.24 6,178.47 -2.52 12/20/16 05/02/17 23.80 2.20 6,188.51 --- 09/27/17 23.80 7.09 6,183.62 -4.89 12/04/09 24.95 14.39 6,176.43 --- 03/23/10 24.78 13.20 6,177.62 1.19 06/15/10 24.78 11.02 6,179.80 2.18 09/08/10 24.78 12.42 6,178.40 -1.40 12/16/10 24.78 14.09 6,176.73 -1.67 05/11/11 24.78 5.07 6,185.75 9.02 09/29/11 24.78 10.61 6,180.21 -5.54 12/09/11 24.78 10.19 6,180.63 0.42 03/29/12 24.78 9.37 6,181.45 0.82 06/08/12 24.78 8.85 6,181.97 0.52 08/21/12 24.78 10.22 6,180.60 -1.37 11/19/12 24.78 11.98 6,178.84 -1.76 03/11/13 nm nm 07/30/13 24.78 11.36 6,179.46 09/30/13 24.78 12.78 6,178.04 -1.42 12/10/13 03/06/14 24.78 12.90 6,177.92 --- 06/26/14 24.78 12.46 6,178.36 0.44 09/17/14 24.78 13.42 6,177.40 -0.96 12/16/14 24.78 14.29 6,176.53 -0.87 03/26/15 24.78 14.32 6,176.50 -0.03 06/12/15 24.78 14.17 6,176.65 0.15 09/11/15 24.78 15.25 6,175.57 -1.08 12/18/15 03/25/16 24.78 11.98 6,178.84 --- 06/21/16 24.78 10.59 6,180.23 1.39 09/28/16 24.78 14.40 6,176.42 -3.81 12/20/16 24.78 12.41 6,178.41 1.99 05/02/17 24.78 3.07 6,187.75 9.34 09/27/17 24.78 7.93 6,182.89 -4.86 Inaccessible-covered by snow Not Measured - Snow Cover Not Measured - Snow Cover Inaccessible-covered by snow LW-MW-12S Inaccessible-well frozen 6,190.71 LW-MW-13S 6,190.82 E 2C Remediation Table 2-5 Project Number: 1950BK26 December 15, 2017 TABLE 2 SUMMARY OF HISTORICAL GROUNDWATER ELEVATION DATA Lake Tahoe Laundry Works South Lake Tahoe, California Reference Total Well Depth to Groundwater GW Elevation Elevation Depth Groundwater Elevation Change (feet MSL)(feet BTOC)(feet BTOC)(feet MSL)(feet) 1024 Lake Tahoe Boulevard DateWell ID LW-MW-1S 6,191.41 03/24/10 23.45 13.25 6,174.87 --- 06/15/10 24.00 11.17 6,176.95 2.08 09/08/10 24.00 12.68 6,175.44 -1.51 12/16/10 24.00 12.13 6,175.99 0.55 05/11/11 24.00 5.91 6,182.21 6.22 09/29/11 24.00 9.25 6,178.87 -3.34 12/09/11 24.00 10.47 6,177.65 -1.22 03/29/12 24.00 9.93 6,178.19 0.54 06/08/12 24.00 9.52 6,178.60 0.41 08/21/12 24.00 11.06 6,177.06 -1.54 11/19/12 24.00 11.41 6,176.71 -0.35 03/11/13 nm nm 07/30/13 24.00 10.69 6,177.43 09/30/13 24.00 13.10 6,175.02 -2.41 12/10/13 24.00 14.02 6,174.10 -0.92 03/06/14 24.00 13.41 6,174.71 0.61 06/26/14 24.00 12.71 6,175.41 0.70 09/17/14 24.00 13.86 6,174.26 -1.15 12/16/14 24.00 14.47 6,173.65 -0.61 03/26/15 24.00 12.85 6,175.27 1.62 06/12/15 24.00 14.14 6,173.98 -1.29 09/11/15 24.00 15.30 6,172.82 -1.16 12/18/15 24.00 16.10 6,172.02 -0.80 03/25/16 24.00 11.73 6,176.39 4.37 06/21/16 24.00 10.82 6,177.30 0.91 09/28/16 24.00 13.32 6,174.80 -2.50 12/20/16 24.00 12.63 6,175.49 0.69 05/02/17 24.00 4.09 6,184.03 8.54 09/27/17 24.00 8.42 6,179.70 -4.33 Notes: BTOC = Below Top of Casing MSL = Mean Sea Level 4th.09-1st.10 1.10 1st.10-2nd.10 2.86 2nd.10-3rd.10 -1.63 3rd. 10-4th.10 -0.29 4th.10-2nd.11 7.71 2nd.11-3rd.11 -4.95 3rd.11-4th.11 -0.16 4th.11-1st.12 0.82 1st.12-2nd.12 -0.70 2nd.12-3rd.12 -1.14 3rd.12-4th.12 -1.57 4th.12-1st.13 3.28 1st.13-2nd.13 -0.89 2nd.13-3rd.13 -1.03 3rd.13-4th.13 -2.24 4th.13-1st.14 0.51 1st.14-2nd.14 1.33 2nd.14-3rd.14 -1.18 3rd.14-4th.14 -0.59 4th.14-1st.15 0.58 1st.15-2nd.15 0.98 2nd.15-3rd.15 -2.41 3rd.15-4th.15 -0.89 4th.15-1st.16 4.09 1st.16-2nd.16 1.19 2nd.16-3rd.16 -2.87 3rd.16-4th.16 1.88 4th.16-2nd.17 8.56 2nd.17-3rd.17 -4.95 6,188.12 Avg Groundwater Elevation Change OS-1 E 2C Remediation Table 2-6 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE 08/13/08 706 74.0 nd<0.50 nd<0.50 nd<0.50 1.25 nd<0.50 0.727 nd<0.50 41.3 nd<0.50 nd<0.50 nd<0.50 na na na na na 12/04/09 5,150 72.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.575 nd<0.500 na na na 03/23/10 1,850 nd<0.500 nd<0.500 nd<0.500 0.962 7.71 nd<0.500 1.41 nd<0.500 339 nd<0.500 0.795 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 duplicate 2,000 nd<0.500 nd<0.500 nd<0.500 0.845 7.40 nd<0.500 1.23 nd<0.500 314 nd<0.500 0.710 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 06/15/10 4,920 8.90 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 6.48 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/08/10 547 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 3.71 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.50012/16/10 109 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 05/11/11 5,380 21.4 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 12.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/29/11 93 4.0 nd<0.50 nd<0.50 nd<0.50 nd<0.50 61 nd<0.50 nd<0.50 2.8 nd<0.50 nd<0.50 nd<0.50 4.4 nd<0.50 0.14 nd<0.50 0.26 12/09/11 841 5.45 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 2.35 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/29/12 1,540 4.83 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 2.85 nd<0.500 5.56 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 duplicate 1,300 3.77 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 2.15 nd<0.500 6.26 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 06/08/12 95.5 2.06 nd<0.500 nd<0.500 nd<0.500 2.23 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.50008/21/12 13.2 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 CLS-Split 11.0 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 CRWQCB 5.4 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 11/19/12 7.98 0.907 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/11/13 5.94 1.68 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 07/30/13 450 7.5 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 3.8 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500duplicate5507.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 4.0 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 09/30/13 770 8.4 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<0.50 nd<2.0 nd<0.50 12/10/13 4.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/06/14 2.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/26/14 130 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/17/14 2.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/16/14 22 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/26/15 1.5 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/12/15 16 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/11/15 150 3.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.90 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/18/15 35 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 37 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/25/16 66 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/21/16 110 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.67 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/28/16 35 0.77 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.55 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/20/16 56 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 72 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/27/17 43 0.51 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.67 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) E2C Remediation Table 3 -1 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) 08/13/08 3.00 2.52 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 31.0 nd<0.50 nd<0.50 nd<0.50 na na na na na 12/04/09 8.29 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na na na 03/23/10 5.9 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.731 na nd<0.500 06/15/10 98.7 4.39 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 4.07 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/08/10 65.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 3.14 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 12/16/10 21.3 1.09 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.50005/11/11 376 11.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 5.04 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/29/11 100 14 nd<0.50 nd<0.50 nd<0.50 nd<0.50 51 nd<0.50 nd<0.50 4.6 nd<0.50 nd<0.50 nd<0.50 1.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/09/11 63.8 7.67 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.89 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 duplicate 74.4 8.61 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 2.41 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/29/12 23.2 3.18 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.09 nd<0.500 2.14 nd<0.500 1.47 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 06/08/12 84.8 6.94 nd<0.500 nd<0.500 nd<0.500 2.69 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.50008/21/12 44.1 3.22 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.67 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 CLS-Split 48 2.70 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.20 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 CRWQCB 20.8 2.30 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.10 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 11/19/12 1.38 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.877 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/11/13 1.11 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 07/30/13 67 2.5 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.1 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 09/30/13 86 2.2 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<0.50 nd<2.0 nd<0.5012/10/13 33 0.57 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 33 0.85 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/06/14 6.2 0.90 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/26/14 5..2 0.57 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/17/14 2.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/16/14 3.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5003/26/15 1.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/12/15 0.95 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/11/15 0.72 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.79 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/18/15 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/25/16 1.0 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5006/21/16 1.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/28/16 1.9 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/20/16 2.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 2.0 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/27/17 34 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 31 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-2S E2C Remediation Table 3 -2 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) 08/13/08 85.1 3.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.00 nd<0.50 nd<0.50 nd<0.50 na na na na na 12/04/09 nd<0.500 11.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na na na 03/23/10 nd<0.500 26.5 3.22 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 38.2 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.778 na 0.529 06/15/10 1,400 28.1 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 29.0 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/08/10 480 11.0 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 11.5 nd<0.500 nd<0.500 nd<0.500 1.07 nd<0.500 nd<0.500 na nd<0.500 duplicate 448 10.6 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 11.3 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.50012/16/10 05/11/11 625 2.74 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.13 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/29/11 750 14 nd<0.50 nd<0.50 nd<0.50 nd<0.50 44 0.19 nd<0.50 8.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 600 13 nd<0.50 nd<0.50 nd<0.50 nd<0.50 37 nd<0.50 nd<0.50 6.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/09/11 964 23.6 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/29/12 225 4.81 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 2.23 nd<0.500 4.04 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.50006/08/12 931 37.6 nd<0.500 nd<0.500 nd<0.500 37.8 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 08/21/12 5.06 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 CLS-Split 6.2 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 CRWQCB 3.1 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 11/19/12 6.99 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/11/13 3.72 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 duplicate 2.57 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.50007/30/13 59 1.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.93 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 09/30/13 81 2.1 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<0.50 nd<2.0 nd<0.50 12/10/13 150 2.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.82 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/06/14 2.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/26/14 13 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 13 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5009/17/14 8.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/16/14 12 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/26/15 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 1.5 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/12/15 3.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/11/15 6.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/18/15 34 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/25/16 180 3.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.70 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/21/16 40 0.55 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.90 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/28/16 31 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/20/16 51 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 52 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 13 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/27/17 2.9 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-5S not sampled; covered with 5 feet of snow E2C Remediation Table 3 -3 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) 12/04/09 324 12.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 19.0 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na na na 03/23/10 174 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 7.78 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 06/15/10 162 7.57 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 22.5 nd<0.500 nd<0.500 nd<0.500 1.32 nd<0.500 nd<0.500 na nd<0.500 duplicate 172 8.04 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 24.5 nd<0.500 nd<0.500 nd<0.500 1.29 nd<0.500 nd<0.500 na nd<0.500 09/08/10 2.18 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 12/16/10 89.8 4.64 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 17.4 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500duplicate89.6 4.51 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 18.4 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 05/11/11 30.6 0.509 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/29/11 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 64 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/09/11 7.64 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/29/12 1.15 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 06/08/12 0.66 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.596 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.50008/21/12 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 11/19/12 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/11/13 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 07/30/13 5.3 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 09/30/13 4.9 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<0.50 nd<2.0 nd<0.50 12/10/13 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/06/14 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5006/26/14 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/17/14 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/16/14 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/26/15 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/12/15 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/11/15 0.54 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/18/15 03/25/16 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/21/16 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.51 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/28/16 1.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 1.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/20/16 1.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.53 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/27/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 Not Sampled - Covered by Snow and Ice LW-MW-9S E2C Remediation Table 3 -4 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) 12/04/09 15.8 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na na na duplicate 10.6 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na na na 03/23/10 1.04 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 06/15/10 63.8 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/08/10 23.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 12/16/10 7.57 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 2.09 nd<0.500 nd<0.500 na nd<0.50005/11/11 8.59 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 4.93 nd<0.500 nd<0.500 na nd<0.500 09/29/11 13 0.18 nd<0.50 nd<0.50 nd<0.50 nd<0.50 56 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.32 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/09/11 6.82 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/29/12 1.42 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 06/08/12 3.56 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 3.08 nd<0.500 nd<0.500 nd<0.500 nd<0.500 08/21/12 2.02 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 4.45 nd<0.500 nd<0.500 nd<0.500 nd<0.50011/19/12 07/30/13 0.89 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 3.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 09/30/13 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 4.1 nd<1.0 nd<0.50 nd<2.0 nd<0.50 duplicate nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 4.3 nd<1.0 nd<0.50 nd<2.0 nd<0.50 12/10/13 0.65 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 3.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/06/14 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.62 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 1.5 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.63 nd<0.50 nd<0.50 nd<0.50 nd<0.5006/26/14 0.84 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 1.9 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/17/14 0.84 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 4.1 0.88 nd<0.50 nd<0.50 nd<0.50 12/16/14 0.51 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 1.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/26/15 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/12/15 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/11/15 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.76 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/18/15 2.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/25/16 1.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/21/16 2.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/28/16 1.5 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.5 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/20/16 2.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 0.74 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.71 nd<0.50 nd<0.50 nd<0.50 nd<0.5009/27/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 1.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 WELL FOUND TO BE DESTROYED ON ATTEMPT TO MONITOR LW-MW-10SR LW-MW-10S E2C Remediation Table 3 -5 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) 12/04/09 42.9 nd<0.50 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na na na 03/23/10 32.5 1.08 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 3.63 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 06/15/10 28.3 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.909 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/08/10 14.8 nd<0.50 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.830 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 12/16/10 2.63 nd<0.50 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 05/11/11 1.33 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.50009/29/11 0.68 0.27 nd<0.50 nd<0.50 nd<0.50 nd<0.50 36 nd<0.50 nd<0.50 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/09/11 18.3 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/29/12 1.41 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 06/08/12 2.13 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.547 nd<0.500 nd<0.500 nd<0.500 nd<0.500 08/21/12 2.14 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 3.97 nd<0.500 nd<0.500 nd<0.500 nd<0.500 11/19/12 6.19 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.50003/11/13 4.41 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 07/30/13 4.5 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 2.4 nd<0.500 nd<0.500 nd<0.500 nd<0.500 09/30/13 4.6 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 2.0 nd<1.0 nd<0.50 nd<2.0 nd<0.50 12/10/13 8.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.0 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/06/14 7.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.70 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/26/14 3.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/17/14 4.5 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.71 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/16/14 2.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 2.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/26/15 06/12/15 0.89 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 0.86 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 1.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/11/15 0.98 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.76 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.0 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/18/15 3.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/25/16 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/21/16 0.66 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/28/16 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/20/16 0.68 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5009/27/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-11S Not Sampled - Wellhead Damaged E2C Remediation Table 3 -6 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) 12/04/09 10.7 nd<0.50 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na na na 03/23/10 34.3 nd<0.50 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.613 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 06/15/10 314 1.40 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.46 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/08/10 824 nd<0.50 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 4.31 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 12/16/10 05/11/11 105 0.651 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500duplicate95.4 0.586 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/29/11 23 0.35 nd<0.50 nd<0.50 nd<0.50 nd<0.50 54 nd<0.50 nd<0.50 0.12 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/09/11 25.1 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/29/12 06/08/12 7.89 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 08/21/12 2.45 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.50011/19/12 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/11/13 07/30/13 35 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 09/30/13 34 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<0.50 nd<2.0 nd<0.50 12/10/13 03/06/14 2.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/26/14 6.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5009/17/14 3.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/16/14 5.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/26/15 0.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/12/15 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/11/15 1.5 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.82 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/18/15 03/25/16 0.74 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/21/16 2.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.56 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/28/16 4.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/20/16 05/02/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5009/27/17 0.96 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-12S not sampled; covered with 12 feet of snow not sampled; covered with 12-foot high pile of snow Not Sampled - Well frozen Not Sampled - Covered by Snow and Ice not sampled; covered with high pile of snow Not Sampled - well covered with snow E2C Remediation Table 3 -7 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) 12/04/09 17 nd<0.50 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na na na 03/23/10 65.2 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.784 nd<0.500 nd<0.500 2.92 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.645 na nd<0.500 06/15/10 14.1 0.603 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.627 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/08/10 4.86 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 12/16/10 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 05/11/11 3.71 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.50009/29/11 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 39 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/09/11 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/29/12 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 06/08/12 1.71 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 08/21/12 2.16 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 11/19/12 2.33 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500duplicate2.18 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/11/13 07/30/13 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 2.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 09/30/13 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<0.50 nd<2.0 nd<0.50 12/10/13 03/06/14 0.89 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/26/14 1.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.63 nd<0.50 nd<0.50 nd<0.50 nd<0.5009/17/14 0.86 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 1.0 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 0.85 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.90 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/16/14 2.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 3.1 0.62 nd<0.50 nd<0.50 nd<0.50 03/26/15 2.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/12/15 2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.99 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/11/15 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.76 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.68 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/18/15 03/25/16 1.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/21/16 0.64 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/28/16 1.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/20/16 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5009/27/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-13S not sampled; covered with high pile of snow Not Sampled - well covered with snow Not Sampled - Covered by Snow and Ice E2C Remediation Table 3 -8 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) 03/24/10 91.2 1.41 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.02 nd<0.500 nd<0.500 0.989 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 0.908 na 0.807 06/15/10 75.9 2.91 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 1.41 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/08/10 13.5 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 12/16/10 52.5 2.43 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 4.43 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 05/11/11 7.1 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 na nd<0.500 09/29/11 4.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 25 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.12 nd<0.5012/09/11 20.6 0.617 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 03/29/12 8.97 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 06/08/12 11.60 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 duplicate 11.20 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 08/21/12 6.3 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 11/19/12 34.9 1.84 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.50003/11/13 07/30/13 26 1.7 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 nd<0.500 09/30/13 8.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<1.0 nd<0.50 nd<2.0 nd<0.50 12/10/13 16 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/06/14 5.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/26/14 15 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/17/14 10 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.5012/16/14 9.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 03/26/15 64 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 06/12/15 10 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/11/15 9.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/18/15 5.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 3/25//16 5.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.87 nd<0.50 nd<0.50 nd<0.50 nd<0.5006/21/16 1.5 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/28/16 1.5 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 12/20/16 9.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/27/17 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 65 1.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 duplicate 66 1.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/27/17 210 4.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.20 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 7.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/27/17 5.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 0.83 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 09/27/17 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/04/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/03/17 0.81 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/02/17 2.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.69 0.67 nd<0.50 nd<0.50 nd<0.50 05/02/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.59 0.53 nd<0.50 nd<0.50 nd<0.50 05/02/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.67 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/03/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 LW-MW-1D LW-MW-2D OS-1 not sampled; covered with high pile of snow LW-MW-5D AS-6 AS-7 AS-8 AS-13 AS-14 AS-19 AS-20 AS-21 E2C Remediation Table 3 -9 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) 05/02/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.78 0.56 nd<0.50 nd<0.50 nd<0.50 05/03/17 0.72 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.56 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/04/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/03/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/03/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/04/17 0.64 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/03/17 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.71 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/04/17 1.1 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 05/04/17 VE-4 VE-3 VE-5 VE-10 VE-11 VE-12 VE-13 AS-25 VE-2S E2C Remediation Table 3 -10 Project Number: 1950BK26 December 15, 2017 PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA Chloroform BDCM Benzene EB MtBE LW-MW-1S TABLE 3 SUMMARY OF HISTORICAL GROUNDWATER ANALYTICAL DATA South Lake Tahoe, California Lake Tahoe Laundry Works1024 Lake Tahoe Boulevard Well ID Sample Date (µg/L) Notes: Results in micrograms per liter (µg/L) (equivalent to parts per billion, ppb) 1,1-DCA = 1,1,-Dichloroethane 1,1-DCE = 1,2-Dichloroethene1,1,1-TCA = 1,1,1-Trichlorethane 1,1,1,2-Tetra = 1,1,1,2-Tetrachloroethane B = Benzene BDCM - Bromodichloromethane CA = Chloroethane CB = ChlorobenzeneCF = Chloroform cis-1,2-DCE = cis-1,2-Dichloroethene EB = Ethlybenzene MC = Methylene Chloride MtBE = Methyl tertiary-butyl ether nd< = Not detected at or above the Method Detection Limit, which is indicated by the value nm = Not monitoredns- not sampled PCE = Tetrachloroethene (a.k.a. perchloroethene) TCE = Trichloroethene trans-1,2-DCE = trans-1,2-Dichloroethene VC = Vinyl Chloride E2C Remediation Table 3 -11 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) 04/09/10 16 108.5 nd nd nd nd nd nd nd nc 09/08/10 72 488.2 nd nd nd nd nd nd 0.031 nc 12/16/10 133 901.7 nd nd nd nd nd nd nd nc 05/11/11 09/29/11 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/09/11 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 03/29/12 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/08/12 16.8 113.9 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 4.59 nc 09/13/12 40 271.2 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/17/12 02/14/13 6.48 43.9 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/25/13 09/30/13 250 1,700 5.5 30 nd<1.2 nd<4.8 nd<1.2 nd<6.74 35.7 nc 12/10/13 30 200 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 18 nc 03/06/14 38 258 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 11 nc 06/26/14 610 4,136 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 12 62.9 09/17/14 38 258 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/16/14 7.5 51 nd<0.03 nd<0.016 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/31/15 13 88 0.99 5.3 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/12/15 nd<0.01 nd<0.0678 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/11/15 5.3 36 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/18/15 5.6 38 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 17 nc 03/25/16 41 278 0.35 1.9 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/21/16 52 353 0.85 4.6 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/28/16 130 882 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/20/16 0.77 5.2 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/27/17 31 210 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 11/29/17 120 814 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc Unable to collect sample; well tubing filled with ice unable to sample - water in well cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas Sample Collected - Sample Holding Time Expired, not analyzed E2C Remediation Table 4A-1 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas 04/09/10 429 2,909 29 155.7 380 1,506 nd nd nd nc 09/08/10 82 556.0 nd nd nd nd nd nd nd nc 12/16/10 2,510 17,018 174 9,344 150 594 nd nd 186 nc 05/11/11 09/29/11 189 1,281 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/09/11 2,020 13,696 86.1 4,624 42.6 169 nd<1.0 nd<5.61 87.8 nc 03/29/12 4,700 31,866 459 2,465 nd<1.0 nd<3.96 nd<1.0 nd<5.61 862 nc 06/08/12 5,050 34,239 107 575 55.2 219 nd<1.0 nd<5.61 108 nc 09/13/12 7,150 48,477 20 107.41 nd<1.0 nd<3.96 nd<1.0 nd<5.61 55 nc 12/17/12 02/14/13 06/25/13 09/30/13 140,000 949,200 4,400 23,628 26,000 102,960 nd<660 nd<3,700 2,700 nc 12/10/13 03/06/14 06/26/14 8,500 57,630 240 1,289 250 990 nd<1.0 nd<5.61 11 nc 09/17/14 800 5,424 nd<10 nd<53.7 nd<10 nd<39.6 nd<1.0 nd<5.61 nd nc 12/16/14 520 3,527 2.7 14.5 12 48 nd<1.0 nd<5.61 nd nc 03/31/15 160 1,085 3.6 19.3 15 59 nd<1.0 nd<5.61 nd nc 06/12/15 0.095 0.64 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/11/15 2,000 13,560 93 499 20 79 nd<10 nd<56.1 nd nc 12/18/15 03/25/16 06/21/16 2900 19,662 84 451 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/28/16 6200 42,036 94 505 13 51 nd<10 nd<56.1 nd nc 12/20/16 82 556 5.6 30 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/27/17 1,200,000 8,136,000 2,700 14,499 650 2,574 nd<10 nd<56.1 56 nc 11/29/17 370,000 2,508,600 3,200 17,184 1100 4,356 nd<10 nd<56.1 18 nc Unable to collect sample; well covered with snow Unable to collect sample; water in well VP-2 unable to sample - water in well Unable to collect sample; well covered with snow Not Sampled - not accessible Not Sampled - not accessible Sample Collected - Sample Holding Time Expired, not analyzed Unable to collect sample; well covered with snow E2C Remediation Table 4A-2 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas 04/09/10 09/08/10 nd nd nd nd nd nd nd nd nd nc 12/16/10 05/11/11 09/29/11 527 3,573 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/09/11 469 3,180 1.96 10.53 nd<1.0 nd<3.96 nd<1.0 nd<5.61 1.98 nc 03/29/12 900 6,102 3.24 18.4 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/08/12 522 3,539 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 09/13/12 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/17/12 02/14/13 06/25/13 09/30/13 3,900 26,442 47 252 170 673 nd<26 nd<140 nd nc 12/10/13 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/06/14 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/26/14 330 2,237 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/17/14 18 122 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/16/14 4.2 28 0.032 0.17 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/31/15 2.1 14 nd<0.030 nd<0.016 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/12/15 nd<0.01 nd<0.0678 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/11/15 160 1,085 0.42 2.26 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/18/15 03/25/16 4.0 27 nd<0.1 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/21/16 2.8 19 nd<0.1 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/28/16 140 949 2.0 10.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/20/16 2.0 14 nd<0.1 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/27/17 3,900 26,442 27 145 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 11/29/17 11,000 74,580 400 2,148 160 634 nd<10 nd<56.1 nd nc Unable to collect sample; well covered with snow VP-3 unable to sample - water in well unable to sample - water in well unable to sample - water in well Unable to collect sample; well covered with snow Unable to collect sample; well covered with snow Sample Collected - Sample Holding Time Expired, not analyzed E2C Remediation Table 4A-3 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas 04/09/10 nd nd nd nd nd nd nd nd nd nc 09/08/10 nd nd nd nd nd nd nd nd nd nc 12/16/10 05/11/11 09/29/11 47 318.7 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/09/11 22.1 149.8 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 03/29/12 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/08/12 54.3 368.2 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 09/13/12 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/17/12 02/14/13 1.38 9.36 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/25/13 09/30/13 4,300 29,154 64 344 26 103 nd<1.2 nd<6.74 21 nc 12/10/13 16 108 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/06/14 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/26/14 340 2,305 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 12 nc 09/17/14 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/16/14 2.5 17 0.10 0.54 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/31/15 1.1 7.5 nd<0.030 nd<0.016 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/12/15 nd<0.01 nd<0.0678 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/11/15 33 224 0.78 4.19 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/18/15 03/25/16 1.5 10.2 nd<0.1 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/21/16 70 475 1.6 8.59 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/28/16 88 597 nd<0.1 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/20/16 0.69 5 nd<0.1 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/27/17 1,300 8,814 3.9 20.9 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 11/29/17 190 1,288 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc VP-4 unable to sample - water in well Unable to collect sample; well covered with snow Sample Collected - Sample Holding Time Expired, not analyzed Unable to collect sample; well covered with snow unable to sample - water in well E2C Remediation Table 4A-4 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas 04/09/10 12 81.4 nd nd 15 59.44 nd nd nd nc 09/08/10 nd nd nd nd nd nd nd nd nd nc 12/16/10 63 427.1 nd nd 62 246 nd nd nd nc 05/11/11 09/29/11 2,130 14,441 15 81 nd<1.0 nd<3.96 nd<1.0 nd<5.61 15.8 nc 12/09/11 41.5 281.4 1.57 84 8.54 34 nd<1.0 nd<5.61 nd nc 03/29/12 93.1 631.2 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 332.3 nc 06/08/12 393 2,665 nd<1.0 nd<5.37 230 911 nd<1.0 nd<5.61 23.0 nc 09/13/12 390 2,644 40 215 420 1,663 nd<1.0 nd<5.61 40 nc 12/17/12 02/14/13 06/25/13 09/30/13 3,700 25,000 480 2,578 2,500 9,900 nd<13 nd<74 505 nc 12/10/13 03/06/14 62 420 nd<10 nd<53.7 39 154 nd<10 nd<56.1 nd nc 06/26/14 540 3,661 52 279 0.27 1.07 nd<10 nd<56.1 nd nc 09/17/14 12/16/14 03/31/15 38 258 6.6 35 50 198 nd<10 nd<56.1 13 nc 06/12/15 0.24 1.63 32 172 250 990 nd<10 nd<56.1 nd nc 09/11/15 150 1,017 19 102 120 475 nd<10 nd<56.1 22 nc 12/18/15 15 102 0.73 3.9 nd<10 nd<56.1 nd<10 nd<56.1 26 nc 03/25/16 130 881 5.1 27.4 84 333 nd<10 nd<56.1 nd nc 06/21/16 230 1,559 29 156 230 911 nd<10 nd<56.1 nd nc 09/28/16 410 2,780 54 290 430 1,703 nd<10 nd<56.1 nd nc 12/20/16 09/27/17 1,000 6,780 29 156 150 594 nd<10 nd<56.1 35 nc 11/29/17 550 3,729 nd<10 nd<53.7 92 364 nd<10 nd<56.1 12 nc unable to sample - water in well Unable to Collect Sample - Wellhead Damaged Unable to Collect Sample - Wellhead Damaged Unable to collect sample; well frozen VP-5 Unable to collect sample; well box filled with ice Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, not analyzed Not Sampled - not accessible E2C Remediation Table 4A-5 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas 04/09/10 28 189.8 nd nd nd nd nd nd nd nc 09/08/10 nd nd nd nd nd nd nd nd nd nc 12/16/10 nd nd nd nd nd nd nd nd 98 nc 05/11/11 nd nd nd nd nd nd nd nd nd nc 09/29/11 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/09/11 1.44 9.8 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 03/29/12 1.77 12.0 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/08/12 39.3 266.5 nd<1.0 nd<5.37 4.95 20 nd<1.0 nd<5.61 5.85 nc 09/13/12 50 339.0 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/17/12 02/14/13 06/25/13 09/30/13 93 631 6.3 34 21 83 nd<1.3 nd<7.5 61.5 nc 12/10/13 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 11 nc 03/06/14 06/26/14 09/17/14 12/16/14 03/31/15 12 81 0.059 0.317 nd<10 nd<39.6 nd<10 nd<56.1 18 nc 06/12/15 0.60 4.1 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/11/15 460 3,119 2.1 11 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/18/15 160 1,085 0.50 2.69 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/25/16 76 515 0.83 4.5 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/21/16 480 3,254 2.1 11.3 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/28/16 290 1,966 nd<0.1 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/20/16 09/27/17 790 5,356 1.1 5.9 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 11/29/17 340 2,305 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc Unable to collect sample; too much vacuum on well Unable to Collect Sample - Obstruction in Well Unable to Collect Sample - Obstruction in Well VP-6 Unable to collect sample; well covered with snow Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, not analyzed Unable to collect sample; well frozen Unable to collect sample; well box filled with ice E2C Remediation Table 4A-6 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas 04/09/10 nd nd nd nd nd nd nd nd nd nc 09/08/10 64 433.9 nd nd nd nd nd nd nd nc 12/16/10 32 217.0 nd nd nd nd nd nd 247 nc 05/11/11 73 494.9 nd nd nd nd nd nd nd nc 09/29/11 2.0 13.6 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/09/11 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 16.1 nc 03/29/12 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/08/12 125 847.5 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 09/13/12 60 406.8 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/17/12 02/14/13 5.03 34.1 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/25/13 09/30/13 110 746 nd<1.3 nd<6.8 2.5 10 nd<1.3 nd<7.1 27.2 nc 12/10/13 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/06/14 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/26/14 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/17/14 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/16/14 0.65 4.4 nd<0.03 nd<0.016 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/31/15 4.6 31.2 0.054 0.290 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/12/15 0.012 0.081 nd<10 nd<53.7 nd<1.0 nd<3.96 nd<10 nd<56.1 nd nc 09/11/15 1.5 10.2 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/18/15 03/25/16 3.7 25 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/21/16 9.4 64 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/28/16 51 346 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/20/16 0.64 4.3 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/27/17 130 881 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 11/29/17 46 312 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc VP-7 Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, not analyzed Unable to collect sample; well covered with snow E2C Remediation Table 4A-7 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas 04/09/10 34 230.5 nd nd nd nd nd nd nd nc 09/08/10 133 901.7 nd nd nd nd nd nd nd nc 12/16/10 318 2,156 nd nd nd nd nd nd nd nc 05/11/11 281 1,905 nd nd nd nd 173 971.3 nd nc 09/29/11 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/09/11 2.01 13.6 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 03/29/12 39.9 270.5 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 3.33 nc 06/08/12 537 3,641 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 09/13/12 30 203.4 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 11/19/12 02/14/13 17.8 121 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/25/13 09/30/13 580 3,932 5.9 32 nd<2.2 nd<8.6 nd<1.2 nd<6.74 127.7 nc 12/10/13 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 25 nc 03/06/14 nd<10 nd<67.8 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 27 nc 06/26/14 100 678 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/17/14 38 258 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/16/14 12 81 0.65 3.49 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/31/15 3.2 22 0.72 3.87 nd<10 nd<39.6 nd<10 nd<56.1 25 nc 06/12/15 nd<0.01 nd<0.0678 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 95 nc 09/11/15 44 298 0.75 4.03 nd<10 nd<39.6 nd<10 nd<56.1 11 nc 12/18/15 03/25/16 9.3 63 0.24 1.29 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/21/16 97 658 0.81 4.35 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/28/16 78 529 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/20/16 0.38 2.6 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/27/17 260 1,763 0.89 4.78 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 11/27/17 46 312 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc VP-8 Unable to collect sample; well covered with snow Unable to collect sample; well covered with snow Sample Collected - Sample Holding Time Expired, not analyzed E2C Remediation Table 4A-8 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas 04/09/10 29 196.6 nd nd nd nd nd nd nd nc 09/08/10 7,530 51,053 nd nd nd nd nd nd nd nc 12/16/10 1,610 10,916 nd nd nd nd nd nd 111 nc 05/11/11 4,480 30,374 nd nd nd nd nd nd nd nc 09/29/11 nd<1.0 nd<6.78 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 60 nc 12/09/11 48.2 326.8 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 03/29/12 1,270 8,611 3.57 19 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/08/12 680 4,610 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 09/13/12 190 1,288 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/17/12 02/14/13 06/25/13 09/30/13 3,800 25,764 nd<12 nd<67 nd<12 nd<49 nd<12 nd<70 nd nc 12/10/13 1,300 8,814 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 23 nc 03/06/14 560 3,797 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 10 nc 06/26/14 1,300 8,814 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 10 nc 09/17/14 2,400 16,272 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/16/14 13 88 nd<0.03 nd<0.016 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/31/15 520 3,526 2.4 13 nd<10 nd<39.6 nd<10 nd<56.1 13 nc 06/12/15 0.94 6.4 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 33 nc 09/11/15 450 3,051 0.37 2.0 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/18/15 110 746 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/25/16 270 1,831 0.13 0.70 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/21/16 630 4,271 0.73 3.92 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/28/16 670 4,543 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/20/16 09/27/17 580 3,932 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 11/29/17 170 1,153 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc VP-9 Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, not analyzed Unable to collect sample; well box filled with ice Unable to collect sample; well frozen E2C Remediation Table 4A-9 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) cis-1,2-DCETCE Other VOCs VP-1 TABLE 4A SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard PCESample Date South Lake Tahoe, California Sample ID Tracer Gas 04/09/10 1,980 13,424 47 252.4 50 198.1 nd nd nd nc 09/08/10 132 895.0 nd nd nd nd nd nd nd nc 12/16/10 43 291.5 nd nd nd nd nd nd 183 nc 05/11/11 132 895.0 nd nd nd nd nd nd nd nc 09/29/11 114 772.9 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/09/11 9.34 63.3 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 03/29/12 nd<1.0 nd<6.78 3.57 19 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/08/12 416 2,820 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 09/13/12 290 1,966 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 12/17/12 02/14/13 13.6 92.2 nd<1.0 nd<5.37 nd<1.0 nd<3.96 nd<1.0 nd<5.61 nd nc 06/25/13 09/30/13 670 4,543 nd<2.5 nd<14 nd<2.5 nd<10 nd<2.5 nd<14 12.7 nc 12/10/13 70 475 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 13 nc 03/06/14 38 258 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 18 nc 06/26/14 210 1,424 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/17/14 160 1,085 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/16/14 24 163 nd<0.03 nd<0.016 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 03/31/15 17 115.3 0.56 3.01 nd<10 nd<39.6 nd<10 nd<56.1 13 nc 06/12/15 0.01 0.07 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 30 nc 09/11/15 7.8 52.9 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/18/15 03/25/16 6.1 41 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 06/21/16 39 264 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/28/16 78 529 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 12/20/16 7.9 54 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 09/27/17 67 454 nd<0.10 nd<0.537 nd<10 nd<39.6 nd<10 nd<56.1 nd nc 11/29/17 210 1,424 nd<10 nd<53.7 nd<10 nd<39.6 nd<10 nd<56.1 nd nc Notes: cis-1,2-DCE = cis-1,2-Dichloroethene (atomic weight = 96.95 g/mol) g/mol = grams per mole nc = Not calculated, as detection limit is based on atomic weight of a compound nd = Not detected at or above detection limit for each respective compound nd< = Not detected at or above the practical quantitation limit (PQL), which is indicated by value PCE = Tetrachloroethene (a.k.a. perchloroethene) (atomic weight = 165.82 g/mol) ppbV = parts per billion by volume TCE = Trichloroethene (atomic weight = 131.39 g/mol) Tracer Gas = Freon 11 or Isopropyl Alcohol µg/m3 = micrograms per cubic meter For Other VOCs and Individual concentrations - See Table 4B VP-10 Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, not analyzed Unable to collect sample; well covered with snow E2C Remediation Table 4A-10 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) 04/09/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 05/11/11 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/08/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 4.59 22.56 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/25/13 09/30/13 na na nd<1.2 nd<3.1 nd<1.2 nd<4.23 na na nd<1.2 nd<4.8 nd<1.2 nd<6.6 1.4 4.0 nd<1.2 nd<5.9 nd<1.2 nd<4.32 5.0 9.4 15 36 13 45 nd<1.2 nd<3.8 nd<1.2 nd<4.5 nd<1.2 nd<5.2 1.3 5.7 nd<1.2 nd<5.9 nd<1.2 nd<5.9 nd<1.2 nd<5.9 na na 12/10/13 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 18 63 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/06/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 11 27 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/26/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 12 62.9 09/17/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/16/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/18/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na 17 40 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/25/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 09/27/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 04/09/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 nd nd nd nd nd nd nd nd nd nd 186 1,015 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 05/11/11 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 87.8 478.7 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 nd<1.0 nd<3.52 33.9 86.6 nd<1.0 nd<3.52 nd<1.0 nd<2.46 459 2,470 405 2,210 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 7.26 31.5 91.2 396 133 652 35.4 174 137 673 nd<1.0 nd<5.24 06/08/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 108 589 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 50 217 50 246 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 06/25/13 09/30/13 na na 1,500 3,800 nd<660 nd<2,300 na na nd<660 nd<2,600 nd<660 nd<3,600 nd<660 nd<1,900 nd<660 nd<3,200 nd<660 nd<2376 nd<2,600 nd<5,000 nd<6,600 nd<16,000 nd<6,660 nd<66,000 nd<660 nd<2,100 1,200 2,500 nd<660 nd<2,900 nd<660 nd<2,900 nd<660 nd<3,200 nd<660 nd<3,200 nd<660 nd<3,200 na na 12/10/13 03/06/14 06/26/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/17/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/16/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<30 nd<157 12/18/15 03/25/16 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 09/27/17 nd<10 nd<35.2 36 92.2 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 04/09/10 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 05/11/11 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 1.98 10.8 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 3.18 17.3 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 10.9 47.3 17.0 83.6 3.84 18.9 17.3 85 nd<1.0 nd<5.24 06/08/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 06/25/13 09/30/13 na na nd<26 nd<66 nd<26 nd<91 na na nd<26 nd<100 nd<26 nd<140 nd<26 nd<76 nd<26 nd<120 nd<26 nd<93.6 nd<100 nd<190 nd<260 nd<610 nd<260 nd<900 nd<26 nd<82 nd<26 nd<97 nd<26 nd<110 nd<26 nd<110 nd<26 nd<130 nd<26 nd<130 nd<26 nd<130 na na 12/10/13 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/06/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/26/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/17/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/16/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/18/15 03/25/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 09/27/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 Sample Collected - Sample Holding Time Expired, Not Analyzed Not Sampled - not accessible Not Sampled - not accessible VP-3 unable to sample - water in well unable to sample - water in well unable to sample - water in well Unable to collect sample; well covered with snow Unable to collect sample; well covered with snow EthylbenzeneChloroform unable to sample - water in well Unable to collect sample; well tubing filled with ice Sample Collected - Sample Holding Time Expired, Not Analyzed Unable to collect sample; well covered with snow TABLE 4B SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA - OTHER VOCS Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard South Lake Tahoe, California Naphthalenen-HexaneVinyl Chloride 4-EthyltolueneTotal XylenesSample ID Vinyl AcetateSample Date Ethyl Acetate VP-2 1,2,4-TMB1,1-DCE Toluene1,1,1-TCA Ethanol VP-1 Unable to collect sample; well covered with snow Unable to collect sample; well covered with snow unable to sample - water in well Unable to collect sample; well covered with snow Sample Collected - Sample Holding Time Expired, Not Analyzed Unable to collect sample; water in well Isopropyl Alcohol 1,3,5-TMBBenzeneAcetoneTetrahydrofuranMC E2C Remediation Table 4B-1 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) EthylbenzeneChloroform TABLE 4B SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA - OTHER VOCS Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard South Lake Tahoe, California Naphthalenen-HexaneVinyl Chloride 4-EthyltolueneTotal XylenesSample ID Vinyl AcetateSample Date Ethyl Acetate 1,2,4-TMB1,1-DCE Toluene1,1,1-TCA Ethanol VP-1 Isopropyl Alcohol 1,3,5-TMBBenzeneAcetoneTetrahydrofuranMC 04/09/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 05/11/11 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/08/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/25/13 09/30/13 na na nd<17 nd<44 nd<17 nd<61 na na nd<17 nd<68 nd<17 nd<94 nd<17 nd<51 nd<17 nd<84 nd<17 nd<61.2 nd<69 nd<130 nd<170 nd<410 nd<170 nd<600 nd<17 nd<55 21 78 nd<17 nd<75 nd<17 nd<75 nd<17 nd<84 nd<17 nd<84 nd<17 nd<84 na na 12/10/13 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/06/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/26/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 12 42 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/17/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/16/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<30 nd<157 12/18/15 03/25/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 09/27/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 04/09/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 05/11/11 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 15.8 86.15 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 23.3 87.8 9.3 40.4 101 438 77.1 379 24.2 120 96.9 476 nd<1.0 nd<5.24 06/08/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 23.0 125 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 40.0 218 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 06/25/13 09/30/13 na na nd<13 nd<34 nd<13 nd<46 na na nd<13 nd<52 nd<13 nd<72 nd<13 nd<39 nd<13 nd<64 nd<13 nd<46.8 nd<53 nd<99 nd<130 nd<310 nd<130 nd<460 nd<13 nd<42 nd<13 nd<50 nd<13 nd<57 nd<13 nd<57 nd<13 nd<65 nd<13 nd<65 nd<13 nd<65 na na 12/10/13 03/06/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/26/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/17/14 12/16/14 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 13 56 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<30 nd<157 12/18/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na 26 62 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<30 nd<157 03/25/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 09/27/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 VP-5 unable to sample - water in well Unable to collect sample; well box filled with ice Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, Not Analyzed VP-4 unable to sample - water in well unable to sample - water in well Unable to collect sample; well covered with snow Sample Collected - Sample Holding Time Expired, Not Analyzed Unable to collect sample; well frozen Unable to collect sample; well covered with snow Unable to collect sample; wellhead damaged Not Sampled - not accessible Unable to collect sample; wellhead damaged E2C Remediation Table 4B-2 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) EthylbenzeneChloroform TABLE 4B SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA - OTHER VOCS Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard South Lake Tahoe, California Naphthalenen-HexaneVinyl Chloride 4-EthyltolueneTotal XylenesSample ID Vinyl AcetateSample Date Ethyl Acetate 1,2,4-TMB1,1-DCE Toluene1,1,1-TCA Ethanol VP-1 Isopropyl Alcohol 1,3,5-TMBBenzeneAcetoneTetrahydrofuranMC 04/09/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 05/11/11 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/08/12 5.85 20.55 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 06/25/13 09/30/13 na na nd<1.3 nd<3.4 nd<1.3 nd<4.7 na na nd<1.3 nd<5.3 nd<1.3 nd<7.3 nd<1.3 nd<3.9 nd<1.3 nd<6.5 nd<1.3 nd<4.7 15 28 29 69 nd<130 nd<460 1.6 5.2 1.5 5.8 nd<1.3 nd<5.8 1.9 8.3 nd<1.3 nd<6.6 nd<1.3 nd<6.6 nd<1.3 nd<6.6 na na 12/10/13 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 11 27 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/06/14 06/26/14 09/17/14 12/16/14 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 18 67.9 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<30 nd<157 12/18/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/25/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 09/27/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 04/09/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 nd nd nd nd nd nd 247 607 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 05/11/11 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/08/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/25/13 09/30/13 na na nd<1.3 nd<2.8 nd<1.3 nd<2.4 na na nd<1.3 nd<5.0 nd<1.3 nd<6.9 nd<1.3 nd<6.7 nd<1.3 nd<6.2 nd<1.3 nd<4.7 9.2 17 18 44 nd<1.3 nd<44 nd<1.3 nd<4.0 nd<1.3 nd<4.8 nd<1.3 nd<5.5 nd<1.3 nd<5.5 nd<1.3 nd<6.2 nd<1.3 nd<6.2 nd<1.3 nd<6.2 na na 12/10/13 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/06/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/26/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/17/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/16/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<30 nd<157 12/18/15 03/25/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 09/27/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 04/09/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 05/11/11 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 3.33 11.7 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/08/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/25/13 09/30/13 na na nd<2.2 nd<5.5 nd<2.2 nd<7.6 na na nd<2.2 nd<8.6 nd<2.2 nd<12 nd<2.2 nd<6.4 2.9 14 nd<10 nd<36 13 25 41 98 nd<22 nd<75 8.7 28 30 110 3.5 15 25.6 110 4.9 24 nd<2.2 nd<11 4.1 20 na na 12/10/13 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na 12 29 13 45 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/06/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 27 66 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/26/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/17/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/16/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 13 56.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 13 68.1 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 69 249 na na nd<10 nd<37.7 26 90 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na 11 26 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<30 nd<157 12/18/15 03/25/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 09/27/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 VP-8 Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, Not Analyzed Unable to collect sample; too much vacuum on well Unable to collect sample; obstruction in well Unable to collect sample; obstruction in well Unable to collect sample; well frozen VP-7 Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, Not Analyzed VP-6 Unable to collect sample; well covered with snow Sample Collected - Sample Comprimised, Not Analyzed Unable to collect sample; well box filled with ice Unable to collect sample; well covered with snow Unable to collect sample; well covered with snow Unable to collect sample; well covered with snow E2C Remediation Table 4B-3 Project Number: 1950BK26 December 15, 2017 (ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3)(ppbV)(µg/m3) EthylbenzeneChloroform TABLE 4B SUMMARY OF HISTORICAL VP SHALLOW SOIL-GAS ANALYTICAL DATA - OTHER VOCS Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard South Lake Tahoe, California Naphthalenen-HexaneVinyl Chloride 4-EthyltolueneTotal XylenesSample ID Vinyl AcetateSample Date Ethyl Acetate 1,2,4-TMB1,1-DCE Toluene1,1,1-TCA Ethanol VP-1 Isopropyl Alcohol 1,3,5-TMBBenzeneAcetoneTetrahydrofuranMC 04/09/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 nd nd nd nd nd nd 111 273 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 05/11/11 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 15 52.8 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/08/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 06/25/13 09/30/13 na na nd<12 nd<32 nd<12 nd<44 na na nd<12 nd<49 nd<12 nd<68 nd<12 nd<36 nd<12 nd<60 nd<12 nd<43.2 nd<50 nd<93 nd<120 nd<290 nd<120 nd<430 nd<12 nd<40 nd<12 nd<47 nd<12 nd<54 nd<12 nd<54 nd<12 nd<61 nd<12 nd<61 nd<12 nd<61 na na 12/10/13 nd<10 nd<35.2 nd<10 nd<25.6 11 39 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 12 45 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/06/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 10 52.4 06/26/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 10 52.4 09/17/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/16/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 13 56.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 33 119 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/18/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/25/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 09/27/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 04/09/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/08/10 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 12/16/10 nd nd nd nd nd nd 183 450 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 05/11/11 nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd na na 09/29/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 na na 12/09/11 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 03/29/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/08/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 08/21/12 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<10 nd<52.4 11/19/12 02/14/13 nd<1.0 nd<3.52 nd<1.0 nd<2.56 nd<1.0 nd<3.52 nd<1.0 nd<2.46 nd<1.0 nd<3.96 nd<1.0 nd<5.45 nd<1.0 nd<2.95 nd<1.0 nd<4.88 nd<1.0 nd<3.6 nd<1.0 nd<1.88 nd<1.0 nd<2.375 nd<1.0 nd<3.47 nd<1.0 nd<3.95 nd<1.0 nd<3.77 nd<1.0 nd<4.34 nd<1.0 nd<4.34 nd<1.0 nd<4.92 nd<1.0 nd<4.91 nd<1.0 nd<4.91 nd<1.0 nd<5.24 06/25/13 09/30/13 na na nd<2.5 nd<6.4 nd<2.5 nd<8.9 na na nd<2.5 nd<10 nd<2.5 nd<140 nd<2.5 nd<7.4 3.0 15 nd<2.5 nd<9.0 nd<10 nd<19 nd<25 nd<60 nd<25 nd<88 nd<2.5 nd<8.0 4.8 18 nd<2.5 nd<11 5.4 24 nd<2.5 nd<12 nd<2.5 nd<12 nd<2.5 nd<12 na na 12/10/13 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd 13 45 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/06/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na 18 43 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/26/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/17/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/16/14 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 03/31/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 13 56.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/12/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 10 25 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 20 69 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/11/15 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/18/15 03/25/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 06/21/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 09/28/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<10 nd<52.4 12/20/16 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 09/27/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 11/29/17 nd<10 nd<35.2 nd<10 nd<25.6 nd<10 nd<35.2 nd<10 nd<24.6 nd<10 nd<39.6 nd<10 nd<54.5 nd<10 nd<29.5 nd<10 nd<48.8 nd<10 nd<36 na na nd<10 nd<23.75 nd<10 nd<34.7 nd<10 nd<39.5 nd<10 nd<37.7 nd<10 nd<43.4 nd<10 nd<43.4 nd<10 nd<49.2 nd<10 nd<49.1 nd<10 nd<49.1 nd<20 nd<104.8 Notes: 1,1-DCE = 1,1-Dichloroethene Notes: 1,1,1-TCA = 1,1,1-Trichloroethane MC` = Methylene Chloride na = not analyzed for this compound nc = Not calculated nd = Not detected at or above detection limit for each respective compound nd< = Not detected at or above the practical quantitation limit (PQL), which is indicated by value PCE = Tetrachloroethene (a.k.a. perchloroethene) ppbV = parts per million by volume TCE = Trichloroethene Tracer Gas = Freon 11 or isopropyl alcohol µg/m3 = micrograms per cubic meter 6/8/12- Ethyl Acetate= 2.63 ppbV; 1,1-dichloroethane= 3.12 ppbV (VP-8) VP-9 Unable to collect sample; well box filled with ice Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, Not Analyzed VP-10 Unable to collect sample; well box filled with ice Sample Collected - Sample Holding Time Expired, Not Analyzed Unable to collect sample; well frozen Unable to collect sample; well covered with snow 9/27/17-trans-1,2-dichloroethene = 20 ppbV (VP-2); 35 ppbV (VP-5) E2C Remediation Table 4B-4 Project Number: 1950BK26 December 15, 2017 Well Depth TOC Elevation Top of Screen Screen Length (feet bgs)(feet rel)(feet bgs)(feet) AS-1 11/3/09 Air Sparge 25.0 2" PVC --23.5 1.5 AS-2 11/5/09 Air Sparge 25.0 2" PVC --23.5 1.5 AS-3 11/6/09 Air Sparge 28.0 2" PVC --26.5 1.5 AS-4 11/5/09 Air Sparge 26.0 2" PVC --24.5 1.5 AS-5 11/5/09 Air Sparge 26.0 2" PVC --24.5 1.5 AS-6 11/5/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-7 11/7/09 Air Sparge 28.5 2" PVC --27.0 1.5 AS-8 11/7/09 Air Sparge 27.0 2" PVC --25.5 1.5 AS-9 11/9/09 Air Sparge 28.5 2" PVC --27.0 1.5 AS-10 11/4/09 Air Sparge 27.0 2" PVC --25.5 1.5 AS-11 11/4/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-12 11/8/09 Air Sparge 27.5 2" PVC --26.0 1.5 AS-13 11/8/09 Air Sparge 29.0 2" PVC --27.5 1.5 AS-14 11/8/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-15 11/9/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-16 11/12/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-17 11/12/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-18 11/11/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-19 11/11/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-20 11/13/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-21 11/12/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-22 11/11/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-23 11/6/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-24 11/13/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-25 11/13/09 Air Sparge 30.0 2" PVC --28.5 1.5 AS-26 11/4/09 Air Sparge 27.0 2" PVC --25.5 1.5 AS-27 11/9/09 Air Sparge 26.0 2" PVC --24.5 1.5 WELL ID Completion Date TABLE 5 SUMMARY OF WELL CONSTRUCTION DETAILS South Lake Tahoe, California Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard Well Type Well Casing Material E2C Remediation Table 5-1 Project Number: 1950BK26 December 15, 2017 Well Depth TOC Elevation Top of Screen Screen Length (feet bgs)(feet rel)(feet bgs)(feet)WELL ID Completion Date TABLE 5 SUMMARY OF WELL CONSTRUCTION DETAILS South Lake Tahoe, California Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard Well Type Well Casing Material LW-MW-1S 7/16/08 Monitoring 23.91 2" PVC 6,191.41 8.9 15 LW-MW-1D 7/16/08 Monitoring 50.00 2" PVC 1,691.36 40.0 10 LW-MW-2S 7/23/08 Monitoring 34.82 2" PVC 6,192.41 19.8 15 LW-MW-2D 7/23/008 Monitoring 49.50 2" PVC 6,192.35 40.0 10 LW-MW-5S 7/24/08 Monitoring 29.70 2" PVC 6,149.87 14.7 15 LW-MW-5D 7/24/08 Monitoring 50.00 2" PVC 6,189.31 40.0 10 LW-MW-9S 11/10/09 Monitoring 24.40 2" PVC 6,192.98 9.4 15 LW-MW-10S 11/12/09 Monitoring 24.76 2" PVC 6,192.15 9.8 15 LW-MW-10SR 6/8/13 Monitoring 24.65 2" PVC 6,191.91 9.7 15 LW-MW-11S 11/12/09 Monitoring 24.30 2" PVC 6,191.67 9.3 15 LW-MW-12S 11/10/09 Monitoring 24.20 2" PVC 6,190.71 9.2 15 LW-MW-13S 11/10/09 Monitoring 24.95 2" PVC 6,190.82 10.0 15 OS-1 3/19/10 Monitoring 25.00 2" PVC 6,176.95 10.0 15 VED-1 11/5/09 Deep Vapor Extraction 13.0 2" PVC --11.0 2 VED-2 11/4/09 Deep Vapor Extraction 14.0 2" PVC --12.0 2 VED-3 11/7/09 Deep Vapor Extraction 14.0 2" PVC --12.0 2 VED-4 11/8/09 Deep Vapor Extraction 13.0 2" PVC --11.0 2 VED-5 11/9/09 Deep Vapor Extraction 13.4 2" PVC --11.4 2 VED-6 11/10/09 Deep Vapor Extraction 12.5 2" PVC --10.5 2 VED-7 11/12/09 Deep Vapor Extraction 12.0 2" PVC --10.0 2 VED-8 11/13/09 Deep Vapor Extraction 12.0 2" PVC --10.0 2 VED-9 11/11/09 Deep Vapor Extraction 12.0 2" PVC --10.0 2 VED-10 11/10/09 Deep Vapor Extraction 12.0 2" PVC --10.0 2 VED-11 11/8/09 Deep Vapor Extraction 12.0 2" PVC --10.0 2 VED-12 11/7/09 Deep Vapor Extraction 11.5 2" PVC --9.5 2 VED-13 11/7/09 Deep Vapor Extraction 13.5 2" PVC --11.5 2 VED-14 11/10/09 Deep Vapor Extraction 12.5 2" PVC --10.5 2 VED-15 11/6/09 Deep Vapor Extraction 12.0 2" PVC --10.0 2 VED-16 11/12/09 Deep Vapor Extraction 12.0 2" PVC --10.0 2 VED-17 11/4/09 Deep Vapor Extraction 15.0 2" PVC --13.0 2 VED-18 11/4/09 Deep Vapor Extraction 13.0 2" PVC --11.0 2 VED-19 11/3/09 Deep Vapor Extraction 12.0 2" PVC --10.0 2 VED-20 11/3/09 Deep Vapor Extraction 12.0 2" PVC --10.0 2 E2C Remediation Table 5-2 Project Number: 1950BK26 December 15, 2017 Well Depth TOC Elevation Top of Screen Screen Length (feet bgs)(feet rel)(feet bgs)(feet)WELL ID Completion Date TABLE 5 SUMMARY OF WELL CONSTRUCTION DETAILS South Lake Tahoe, California Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard Well Type Well Casing Material VES-1 11/5/09 Shallow Vapor Extraction 9.0 2" PVC --4.0 5 VES-2 11/4/09 Shallow Vapor Extraction 10.0 2" PVC --5.0 5 VES-3 11/7/09 Shallow Vapor Extraction 10.0 2" PVC --5.0 5 VES-4 11/8/09 Shallow Vapor Extraction 9.0 2" PVC --4.0 5 VES-5 11/9/09 Shallow Vapor Extraction 9.4 2" PVC --4.4 5 VES-6 11/10/09 Shallow Vapor Extraction 8.5 2" PVC --3.5 5 VES-7 11/12/09 Shallow Vapor Extraction 8.0 2" PVC --3.0 5 VES-8 11/13/09 Shallow Vapor Extraction 8.0 2" PVC --3.0 5 VES-9 11/11/09 Shallow Vapor Extraction 8.0 2" PVC --3.0 5 VES-10 11/11/09 Shallow Vapor Extraction 8.0 2" PVC --3.0 5 VES-11 11/8/09 Shallow Vapor Extraction 8.0 2" PVC --3.0 5 VES-12 11/7/09 Shallow Vapor Extraction 7.5 2" PVC --3.5 4 VES-13 11/7/09 Shallow Vapor Extraction 9.5 2" PVC --4.5 5 VES-14 11/10/09 Shallow Vapor Extraction 8.5 2" PVC --3.5 5 VES-15 11/6/09 Shallow Vapor Extraction 8.0 2" PVC --3.0 5 VES-16 11/12/09 Shallow Vapor Extraction 8.0 2" PVC --3.0 5 VES-17 11/4/09 Shallow Vapor Extraction 9.0 2" PVC --4.0 5 VES-18 11/4/09 Shallow Vapor Extraction 9.0 2" PVC --4.0 5 VES-19 11/3/09 Shallow Vapor Extraction 7.0 2" PVC --2.0 5 VES-20 11/3/09 Shallow Vapor Extraction 7.0 2" PVC --2.0 5 E2C Remediation Table 5-3 Project Number: 1950BK26 December 15, 2017 Well Depth TOC Elevation Top of Screen Screen Length (feet bgs)(feet rel)(feet bgs)(feet)WELL ID Completion Date TABLE 5 SUMMARY OF WELL CONSTRUCTION DETAILS South Lake Tahoe, California Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard Well Type Well Casing Material VP-1 11/5/09 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 VP-2 11/5/09 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 VP-3 11/9/10 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 VP-4 11/7/09 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 VP-5 11/3/09 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 VP-6 11/3/09 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 VP-7 11/9/10 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 VP-8 11/9/10 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 VP-9 11/8/09 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 VP-10 11/8/09 Shallow Soil-Gas 5.0 1/8-inch Teflon Tubing 4.875 0.125 Notes All wells are of Schedule 40 PVC construction PVC = Poly vinyl chloride feet bgs = feet below ground surface TOC Elevation = Top of casing elevation based on feet above MSL relative at MW-1 taken from Topographic Map E2C Remediation Table 5-4 Project Number: 1950BK26 December 15, 2017 Operational Cumulative Hour Cumulative Inlet Status Calendar Meter Operating Flow System Wellfield Influent Effluent PCE TCE**cis-1,2-DCE Other VOCs PCE TCE**cis-1,2-DCE Total on Arrival Days Reading Hours (scfm)(%)(ppmV)(ppmV)(lbs) 4/8/10 off 0 202.0 0 500 3.75 2.75 20.6 140 0 0.681 0.031 0.041 ND 0.009 0.00032 0.00031 0.010 0.000 4/9/10 off 1 205.0 3.0 500 4.15 2.75 20.6 130 0 1.950 0.045 0.048 ND 0.026 0.00047 0.00037 0.026 0.054 4/16/10 off 8 369.4 167.4 500 3.50 3.50 20.2 110 0 1.077 0.023 0.024 0.014 0.00023 0.00018 0.015 3.419 4/29/10 off 21 678.9 476.9 500 3.70 3.70 20.1 80 0 1.077 0.023 0.024 0.014 0.00023 0.00018 0.015 7.917 5/6/10 on 28 841.0 639.0 500 4.50 4.50 20.9 25 0 1.077 0.023 0.024 0.014 0.00023 0.00018 0.015 10.27 5/12/10 on 34 978.7 776.7 500 3.50 3.50 20.9 90 0 1.077 0.023 0.024 0.014 0.00023 0.00018 0.015 12.27 6/1/10 off 54 1,462 1,260 500 3.70 3.70 20.9 90 0 1.077 0.023 0.024 0.014 0.00023 0.00018 0.015 19.30 6/15/10 on 68 1,834 1,632 500 3.30 3.30 20.8 65 0 1.077 0.023 0.024 0.014 0.00023 0.00018 0.015 24.71 6/24/10 on 77 2,006 1,804 500 3.45 3.45 20.9 45 0 0.204 ND ND ND 0.003 0.00 0.00 0.003 26.19 7/2/10 on 85 2,199 1,997 500 3.30 3.30 20.8 170 0 3.407 0.140 0.0 0.045 0.00 0.00 0.046 30.90 7/15/10 off 98 2514.0 2,312 500 2.50 2.50 20.8 130 0 6.61 0.281 ND ND 0.087 0.00292 0.00 0.000 38.16 7/22/10 off 105 2680.0 2,478 500 3.00 3.00 20.7 120 0 4.325 0.156 0.0 0.057 0.00162 0.00 0.058 43.00 7/28/10 off 111 2681.0 2,479 500 3.26 3.26 20.7 160 0 4.325 0.156 0.0 0.057 0.00162 0.00 0.058 43.06 8/5/10 on 119 2850.0 2,648 500 3.15 3.15 nm 120 0 4.325 0.156 0.0 0.057 0.00162 0.00 0.058 52.91 8/5/10 on 119 2853.0 2,651 500 3.14 3.14 nm 210 0 4.325 0.156 0.0 0.057 0.00162 0.00 0.058 53.09 8/11/10 on 125 3020.0 2,818 500 3.15 3.15 20.9 170 0 2.04 0.031 ND ND 0.027 0.00032 0.00 0.027 60.2 8/18/10 on 132 3187.0 2,985 500 3.46 3.46 20.9 170 0 9.14 0.096 0.047 ND 0.120 0.00100 0.00036 0.121 72.6 8/25/10 on 139 3355.0 3,153 500 2.46 2.46 nm 180 0 11.4 1.83 4.32 ND 0.149 0.01901 0.03311 0.202 99.7 9/3/10 on 148 3568.3 3,366 500 2.80 2.80 20.7 195 10 13.9 0.99 2.18 0.182 0.01030 0.01673 0.209 143.5 9/8/10 on 153 3694.4 3,492 500 2.80 2.80 20.7 85 0 13.9 0.99 2.18 0.182 0.01030 0.01673 0.209 169.9 9/15/10 on 160 3863.0 3,661 500 5.16 5.16 20.1 60 0 13.9 0.99 2.18 0.182 0.01030 0.01673 0.209 205.2 9/15/10 on 160 3866.0 3,664 500 5.16 5.16 20.1 120 0 16.4 0.154 0.046 0.266 0.215 0.00160 0.00035 0.217 205.8 9/23/10 off 168 4051.5 3,850 500 4.15 4.15 20.9 190 0 16.4 0.1 0.0 0.000 0.215 0.00134 0.00030 0.217 246.0 9/28/10 on 173 4169.9 3,968 500 3.99 4.00 20.1 130 0 16.4 0.1 0.0 0.000 0.215 0.00134 0.00030 0.217 271.7 10/6/10 off 181 4362.4 4,160 500 4.98 4.98 20.1 75 0 11.8 0.104 0.033 0.112 0.155 0.00108 0.00025 0.156 307.5 10/13/10 on 188 4532.7 4,331 500 5.71 5.71 20.8 135 0 7.3 0.05 0.02 0.056 0.095 0.00054 0.00013 0.096 329.0 10/22/10 on 197 4746.8 4,545 500 5.00 5.00 20.9 190 0 7.3 0.05 0.02 0.056 0.095 0.00054 0.00013 0.096 349.5 10/28/10 off 203 4889.2 4,687 500 4.95 4.95 20.1 180 0 7.3 0.05 0.02 0.056 0.095 0.00054 0.00013 0.096 363.1 11/4/10 on 210 5056.4 4,854 500 4.83 4.83 nm 110 0 7.3 0.05 0.02 0.056 0.095 0.00 0.00 0.096 379.1 11/11/10 on 217 5255.8 5,054 500 5.22 5.22 20.1 230 0 2.7 ND ND ND 0.035 0.00 0.00 0.035 392.2 11/23/10 off 229 5684.7 5,483 0 nm nm nm 0 0 2.4 0.20 0.00 0.000 0.000 0.00 0.00 0.000 399.8 12/1/10 off 237 5684.7 5,483 500 2.60 2.60 nm 200 0 2.4 0.20 0.00 0.000 0.032 0.00 0.00 0.032 399.8 12/7/10 on 243 5826.3 5,624 500 3.24 3.24 20.1 190 0 2.4 0.20 0.00 0.000 0.032 0.00 0.00 0.032 404.3 12/16/10 on 252 6043.2 5,841 500 nm nm nm 180 0 2.18 0.39 ND ND 0.029 0.00405 0.00 0.033 411.3 1/4/11 off 271 6463.5 6,262 500 2.89 nm 20.1 80 0 6.7 0.3 0.0 0.1 0.088 0.00000 0.00 0.088 436.7 1/14/11 off 281 6707.8 6,506 500 2.00 nm 20.9 55 0 0.014 0.121 0.000 0.00000 0.00 0.000 447.5 1/21/11 on 288 6873.9 6,672 500 2.00 2.00 20.8 60 0 11.30 0.228 0.028 0.241 0.148 0.00237 0.00021 0.151 460.0 1/27/11 on 294 7018.5 6,817 500 2.50 nm 20.9 45 0 6.0 0.1 0.0 0.145 0.079 0.00118 0.00000 0.080 476.7 2/2/11 on 300 7158.7 6,957 500 3.03 3.03 20.9 45 0 6.0 0.114 0.014 0.145 0.079 0.00118 0.00000 0.080 488.0 2/11/11 on 309 7375.1 7,173 500 2.80 2.80 20.9 25 0 6.0 0.114 0.014 0.145 0.079 0.00118 0.00000 0.080 505.4 2/21/11 off 319 7616.5 7,415 500 2.80 2.80 20.4 30 0 6.0 0.114 0.014 0.145 0.079 0.00118 0.00000 0.080 524.8 3/4/11 off 330 7879.0 7,677 500 3.00 3.00 20.8 75 0 6.0 0.114 0.014 0.145 0.079 0.00118 0.00000 0.080 546.0 3/11/11 on 337 8048.6 7,847 500 4.45 4.45 20.9 220 0 6.0 0.114 0.014 0.145 0.079 0.00118 0.00000 0.080 559.6 3/26/11 off 352 8456.8 8,255 500 5.00 5.00 19.8 200 0 6.0 0.114 0.014 0.145 0.079 0.00118 0.00000 0.080 592.5 4/6/11 off 363 8674.5 8,473 500 5.90 nm nm 0 0 6.0 0.114 0.014 0.145 0.079 0.00118 0.00000 0.080 610.0 4/12/11 off 369 8675.5 8,474 500 1.95 1.95 20.8 60 0 6.0 0.114 0.014 0.145 0.079 0.00118 0.00000 0.080 610.0 5/11/11 off 398 9322.6 9,121 500 nm nm nm nm nm 6.0 0.114 0.014 0.145 0.079 0.00118 0.00000 0.080 662.1 5/18/11 on 405 9488.9 9,287 500 1.75 1.75 20.8 60 0 0.795 ND ND 0.049 0.010 0.00 0.00 0.010 669.7 5/24/11 on 411 9632.8 9,431 500 4.10 4.10 nm 20 0 2.5 0.0 0.0 0.6 0.033 0.00 0.00 0.033 672.8 6/1/11 on 419 9823.0 9,621 500 3.50 3.50 20.8 10 0 2.5 0.0 0.0 0.6 0.033 0.00 0.00 0.033 679.1 6/9/11 on 427 10012.3 9,810 500 4.00 4.00 20.8 20 0 2.5 0.0 0.0 0.6 0.033 0.00 0.00 0.033 685.3 6/14/11 on 432 10134.7 9,933 500 5.30 5.30 nm 5 0 4.23 ND ND 1.181 0.055 0.00 0.00 0.055 690.7 6/21/11 on 439 10303.2 10,101 500 5.50 5.50 nm 2.8 0 2.3 0.00 0.00 0.6 0.030 0.00 0.00 0.030 697.9 6/27/11 on 445 10446.1 10,244 500 4.80 4.80 nm 0 0 2.3 0.00 0.00 0.6 0.030 0.00 0.00 0.030 702.2 South Lake Tahoe, California Cumulative VOCs Extracted Influent Oxygen ContentDate Monitored (ppmV) TABLE 6 SUMMARY OF SVE/GAS REMEDIATION SYSTEM OPERATIONAL DATALake Tahoe Laundry Works1024 Lake Tahoe Boulevard (lbs/hr) VOCs ExtractedField Vapor Total VOCsVacuum (in-Hg) Lab Vapor Influent E2C Remediation Table 6-1 Project Number: 1950BK26 December 15, 2017 Operational Cumulative Hour Cumulative Inlet Status Calendar Meter Operating Flow System Wellfield Influent Effluent PCE TCE**cis-1,2-DCE Other VOCs PCE TCE**cis-1,2-DCE Total on Arrival Days Reading Hours (scfm)(%)(ppmV)(ppmV)(lbs) South Lake Tahoe, California Cumulative VOCs Extracted Influent Oxygen ContentDate Monitored (ppmV) TABLE 6 SUMMARY OF SVE/GAS REMEDIATION SYSTEM OPERATIONAL DATALake Tahoe Laundry Works1024 Lake Tahoe Boulevard (lbs/hr) VOCs ExtractedField Vapor Total VOCsVacuum (in-Hg) Lab Vapor Influent 7/5/11 no 453 10637.1 10,435 500 5.50 5.50 nm 5.0 0 2.3 0.00 0.00 0.6 0.030 0.00 0.00 0.030 707.9 7/12/11 no 460 10803.4 10,601 0 0.00 0.00 0 0 2.3 0.00 0.00 0.6 0.000 0.00 0.00 0.000 710.4 7/13/11 no 461 10803.9 10,602 500 3.00 3.00 20.1 260 10 2.3 0.00 0.00 0.6 0.030 0.00 0.00 0.030 710.4 7/18/11 no 466 10949.5 10,748 500 3.00 3.00 20.8 160 10 0.332 ND ND 0.419 0.0044 0.00 0.00 0.004 712.9 7/27/11 yes 475 11164.6 10,963 500 3.00 3.00 20.9 205 5 2.129 0.00 0.00 0.000 0.028 0.00 0.00 0.028 716.3 8/11/11 yes 490 11526.4 11,324 500 4.75 4.75 20.6 120 0 2.129 0.00 0.00 0.000 0.028 0.00 0.00 0.028 726.4 8/18/11 no 497 11692.8 11,491 500 4.60 4.60 nm 3 2.129 0.00 0.00 0.000 0.028 0.00 0.00 0.028 731.1 8/26/11 yes 505 11883.2 11,681 500 2.30 2.30 20.6 103 0 2.129 0.00 0.00 0.000 0.028 0.00 0.00 0.028 736.4 8/31/11 no 510 12005.0 11,803 500 3.80 3.80 nm 11 4 0.028 ND ND 0.013 0.00037 0.00 0.00 0.0004 738.1 9/7/11 no 517 12170.7 11,969 500 3.75 3.75 nm 5 1 1.489 0.1 0.00 0.0 0.020 0.00 0.00 0.020 739.7 9/15/11 no 525 12362.0 12,160 500 3.70 3.70 nm 4 0.5 1.489 0.1 0.00 0.0 0.020 0.00 0.00 0.020 743.5 9/22/11 yes 532 12531.8 12,330 500 4.50 4.50 nm 3 6 1.489 0.1 0.00 0.0 0.020 0.00 0.00 0.020 746.8 9/29/11 yes 539 12703.5 12,502 500 4.60 4.60 nm 285 0 1.489 0.1 0.00 0.0 0.020 0.00 0.00 0.020 750.1 10/5/11 no 545 12838.8 12,637 0 0.00 0.00 0.0 67 0 1.489 0.1 0.00 0.0 0.000 0.00 0.00 0.000 751.5 10/6/11 no 546 12839.3 12,637 500 nm nm nm 160 0 1.489 0.1 0.00 0.0 0.020 0.00 0.00 0.020 751.5 10/13/11 yes 553 13010.1 12,808 500 3.00 3.00 nm 18.6 0 2.95 0.19 ND 0.0197 0.039 0.00194 0.00 0.041 756.6 10/18/11 yes 558 13130.1 12,928 500 5.00 5.00 20.9 45 0 2.280 0.106 0.00 14.8 0.030 0.00000 0.00000 0.030 760.8 10/26/11 yes 566 13324.3 13,122 500 3.00 3.00 20.6 60 0 2.280 0.106 0.00 14.8 0.030 0.00000 0.00000 0.030 766.6 11/30/11 no 601 13324.3 13,122 500 4.00 4.00 20.3 50 0 2.280 0.106 0.00 14.8 0.030 0.00000 0.00000 0.030 766.6 12/9/11 no 610 13535.1 13,333 500 3.50 3.50 20.8 140 0 1.61 0.024 ND 29.60 0.021 0.00025 0.00 0.021 772.3 12/15/11 yes 616 13681.1 13,479 500 3.50 3.50 20.8 160 0 1.304 0.01 0.00 14.8 0.017 0.00012 0.00000 0.017 775.2 12/21/11 yes 622 13825.5 13,624 500 3.00 3.00 20.8 85 0 1.304 0.01 0.00 14.8 0.017 0.00012 0.00000 0.016 777.6 1/4/12 yes 636 14165.5 13,964 500 2.15 nm 20.9 75 5.5 0.997 ND ND ND 0.013 0.00 0.00 0.013 782.5 1/12/12 yes 644 14353.0 14,151 500 3.15 3.15 20.9 60 0 1.119 0.062 0.000 0.0 0.015 0.00 0.00 0.015 785.1 1/17/12 no 649 14471.7 14,270 500 3.60 3.60 20.8 85 0 1.119 0.06 0.00 0.0 0.015 0.00 0.00 0.007 786.4 1/25/12 no 657 14667.2 14,465 500 4.10 4.10 20.9 90 0 1.119 0.06 0.00 0.0 0.015 0.00 0.00 0.004 787.5 2/3/12 no 666 14881.7 14,680 500 4.23 4.23 20.8 70 0 1.119 0.06 0.00 0.0 0.015 0.00 0.00 0.010 788.9 2/9/12 no 672 15024.4 14,822 500 4.00 4.00 nm 50 0 1.24 0.012 ND ND 0.016 0.00 0.00 0.016 790.8 2/17/12 no 680 15215.9 15,014 0 0.00 0.00 0.0 0 0 1.240 0.006 0.00 0.0 0.000 0.00 0.00 0.000 792.4 3/8/12 no 700 15215.9 15,014 0 0.00 0.00 0.0 0 0 1.240 0.006 0.00 0.0 0.000 0.00 0.00 0.000 792.4 3/29/12 no 721 15215.9 15,014 500 0.00 0.00 0.0 0 0 1.240 0.006 0.00 0.0 0.016 0.00 0.00 0.016 792.4 4/18/12 no 741 15216.0 15,014 500 3.50 3.50 nm 4 0 1.240 0.006 0.00 0.0 0.016 0.00 0.00 0.016 792.4 4/26/12 no 749 15407.3 15,205 0 0.00 0.00 0.0 0 0 1.240 0.006 0.00 0.0 0.000 0.00 0.00 0.000 793.9 5/1/12 yes 754 15525.6 15,324 500 3.50 2.50 nm 10 0 1.240 0.006 0.00 0.0 0.016 0.00 0.00 0.016 794.9 5/8/12 yes 761 15693.3 15,491 500 3.50 2.50 nm 10 0 1.240 0.006 0.00 0.0 0.016 0.00 0.00 0.016 797.6 5/14/12 yes 767 15839.8 15,638 500 3.45 2.50 nm 18 0 1.24 ND ND 0.056 0.016 0.00 0.00 0.016 800.0 5/23/12 yes 776 16053.1 15,851 500 3.95 3.00 nm 20-23 0 1.950 0.00 0.00 0.043 0.026 0.00000 0.00000 0.026 804.4 5/30/12 yes 783 16220.0 16,018 500 3.00 3.00 nm 15.3 0 1.950 0.00 0.00 0.043 0.026 0.00000 0.00000 0.026 808.7 6/8/12 no 792 16438.7 16,237 500 3.95 3.00 nm 14.3 0 1.950 0.00 0.00 0.043 0.026 0.00000 0.00000 0.026 814.3 6/14/12 yes 798 16582.0 16,380 500 0.00 0.00 0.0 0 0 1.950 0.00 0.00 0.043 0.026 0.00000 0.00000 0.026 818.0 6/21/12 no 805 16584.2 16,382 500 3.50 2.75 nm 30 0 1.950 0.00 0.00 0.043 0.026 0.00000 0.00000 0.026 818.0 6/27/12 yes 811 16723.0 16,521 500 4.0 3.25 20.9 35 0 2.66 ND ND 0.03 0.035 0.00 0.00 0.035 822.2 7/20/12 no 834 17275.9 17,074 500 4.5 4.00 20.8 35 0 1.985 0.01 0.00 0.02 0.026 0.00 0.00 0.026 839.0 7/26/12 no 840 17424.0 17,222 500 4.0 3.25 nm 22 0 1.31 0.013 ND ND 0.017 0.00 0.00 0.017 842.2 8/1/12 yes 846 17564.2 17,362 500 4.0 3.40 nm 18.3 0 0.876 0.01 0.00 0.00 0.011 0.00 0.00 0.011 844.2 8/8/12 yes 853 17736.3 17,534 500 3.3 2.60 nm 20.6 0 0.876 0.01 0.00 0.00 0.011 0.00 0.00 0.011 846.2 8/16/12 no 861 17925.7 17,724 500 4.0 3.25 nm 21 0 0.876 0.01 0.00 0.00 0.011 0.00 0.00 0.011 848.4 8/21/12 yes 866 18043.6 17,842 500 3.7 3.00 nm 18.2 0 0.441 ND ND ND 0.006 0.00 0.00 0.006 849.4 8/28/12 yes 873 18212.9 18,011 500 4.5 5.20 20.8 40.0 0 0.221 0.000 0.000 0.00 0.003 0.00 0.00 0.003 850.1 9/7/12 no 883 18452.3 18,250 0 0.0 0.00 0.0 0.0 0 0.221 0.000 0.000 0.00 0.000 0.00 0.00 0.000 850.5 9/13/12 no 889 18452.3 18,250 500 5.5 4.15 nm 28.6 0 0.00 0.00 0.00 0.00 0.000 0.00 0.00 0.000 850.5 E2C Remediation Table 6-2 Project Number: 1950BK26 December 15, 2017 Operational Cumulative Hour Cumulative Inlet Status Calendar Meter Operating Flow System Wellfield Influent Effluent PCE TCE**cis-1,2-DCE Other VOCs PCE TCE**cis-1,2-DCE Total on Arrival Days Reading Hours (scfm)(%)(ppmV)(ppmV)(lbs) South Lake Tahoe, California Cumulative VOCs Extracted Influent Oxygen ContentDate Monitored (ppmV) TABLE 6 SUMMARY OF SVE/GAS REMEDIATION SYSTEM OPERATIONAL DATALake Tahoe Laundry Works1024 Lake Tahoe Boulevard (lbs/hr) VOCs ExtractedField Vapor Total VOCsVacuum (in-Hg) Lab Vapor Influent 9/18/12 yes 894 18714.5 18,513 500 4.5 3.75 nm 14.1 0 0.073 0.000 0.000 0.117 0.001 0.00 0.00 0.001 850.6 9/28/12 yes 904 18949.8 18,748 500 4.1 3.40 nm 13.6 0 0.073 0.000 0.000 0.117 0.001 0.00 0.00 0.001 850.8 10/3/12 yes 909 19072.9 18,871 500 4.75 3.95 nm 18.6 0 0.073 0.000 0.000 0.117 0.001 0.00 0.00 0.001 851.0 10/12/12 no 918 19074.2 18,872 500 2.80 3.15 nm 13.1 0 0.073 0.000 0.000 0.117 0.001 0.00 0.00 0.001 851.0 10/17/12 yes 923 19191.5 18,990 500 2.32 1.86 20.3 20 0 0.073 0.000 0.000 0.117 0.001 0.00 0.00 0.001 851.1 10/23/12 yes 929 19335.9 19,134 500 3.75 2.50 20.8 65 0 0.073 0.000 0.000 0.117 0.001 0.00 0.00 0.001 851.2 10/31/12 yes 937 19527.3 19,325 500 2.45 2.00 nm 25 0 0.145 0.00 0.00 0.233 0.002 0.00 0.00 0.002 851.5 11/6/12 yes 943 19673.6 19,472 500 2.75 2.30 20.8 40 0 0.073 0.00 0.00 0.117 0.001 0.00 0.00 0.001 851.7 11/19/12 yes 956 19985.0 19,783 500 2.80 2.35 nm 14.4 0 0.073 0.00 0.00 0.117 0.001 0.00 0.00 0.001 852.0 11/30/12 no 967 20248.3 20,046 500 4.90 4.33 nm 5.0 0 0.000 0.00 0.00 0.00 0.000 0.00 0.00 0.000 852.1 11/5/13 off 967 36969.0 20,046 500 3.71 2.98 nm 149.5 1.6 0.195 0.00 0.00 0.850 0.003 0.00000 0.00000 0.003 852.1 11/15/13 on 977 37209.0 20,286 500 2.75 2.25 nm 13.6 0.3 0.195 0.00 0.00 0.850 0.003 0.00000 0.00000 0.003 852.7 11/22/13 on 984 170.7 20,457 500 2.80 2.25 nm 6.3 1.1 0.39 0.00 0.00 1.7 0.005 0.00 0.00 0.005 853.4 11/26/13 on 988 266.3 20,553 500 2.80 2.25 nm 6.1 0.4 0.440 0.00 0.00 0.895 0.006 0.00000 0.00000 0.006 853.9 12/4/13 on 996 459.9 20,746 500 2.95 2.50 nm 5.8 0 0.440 0.00 0.00 0.895 0.006 0.00000 0.00000 0.006 855.0 12/10/13 on 1,002 599.9 20,886 500 2.80 2.25 nm 4.6 0.1 0.49 0.00 0.00 0.09 0.006 0.00 0.00 0.006 855.9 12/19/13 on 1,011 812.3 21,099 500 2.95 2.50 nm 5.1 0 0.380 0.00 0.00 0.045 0.005 0.00000 0.00000 0.005 857.1 12/27/13 off 1,019 1006.4 21,293 500 2.96 2.50 nm 5.3 0 0.380 0.00 0.00 0.045 0.005 0.00000 0.00000 0.005 858.0 1/3/14 on 1,026 1173.1 21,459 500 2.90 2.30 nm 4.3 0 0.380 0.00 0.00 0.045 0.005 0.00000 0.00000 0.005 858.9 1/7/14 on 1,030 1267.9 21,554 500 2.90 2.30 nm 3.9 0 0.27 0.00 0.00 0.00 0.004 0.00 0.00 0.004 859.3 1/14/14 on 1,037 1434.8 21,721 500 2.90 2.30 nm 5.4 0 0.135 0.00 0.00 0.013 0.002 0.00000 0.00000 0.002 859.7 1/20/14 on 1,043 1577.8 21,864 500 3.20 2.60 nm 0.7 0 0.135 0.00 0.00 0.013 0.002 0.00000 0.00000 0.002 860.0 1/28/14 off 1,051 1767.7 22,054 500 2.90 2.30 nm 3.6 0 0.135 0.00 0.00 0.013 0.002 0.00000 0.00000 0.002 860.3 1/31/14 off 1,054 1834.9 22,121 500 1.49 1.88 nm 4.6 0 0.135 0.00 0.00 0.013 0.002 0.00000 0.00000 0.002 860.4 2/4/14 on 1,058 1924.8 22,211 500 2.21 1.76 nm 2.4 0 0.135 0.00 0.00 0.013 0.002 0.00000 0.00000 0.002 860.6 2/14/14 on 1,068 2164.8 22,451 500 3.41 3.71 nm 5.0 0 0.135 0.00 0.00 0.013 0.002 0.00000 0.00000 0.002 861.01 2/18/14 off 1,072 2166.9 22,453 500 1.07 1.54 20.9 5.0 0 0.135 0.00 0.00 0.013 0.002 0.00000 0.00000 0.002 861.02 2/26/14 on 1,080 2354.3 22,641 500 nm nm nm 0.0 0 0.135 0.00 0.00 0.013 0.002 0.00000 0.00000 0.002 861.35 2/28/14 off 1,082 2354.3 22,641 500 2.75 2.30 nm 0.0 0 0.00 0.00 0.00 0.025 0.000 0.00 0.00 0.000 861.35 3/6/14 on 1,088 2495.7 22,782 500 2.60 2.00 nm 2.4 0 0.000 0.00 0.00 0.037 0.000 0.00000 0.00000 0.000 861.35 3/20/14 off 1,102 2496.1 22,782 500 1.25 0.70 nm 0.0 0 0.00 0.00 0.00 0.048 0.000 0.00 0.00 0.000 861.35 3/24/14 off 1,106 2590.5 22,877 500 1.20 0.65 nm 1.2 0 0.011 0.00 0.00 0.030 0.000 0.00000 0.00000 0.000 861.36 4/4/14 off 1,117 2850.6 23,137 0 0.00 0.00 nm 0.0 0 0.011 0.00 0.00 0.030 0.000 0.00000 0.00000 0.000 861.37 4/4/14 on at depart 1,117 2852.2 23,139 500 1.40 0.78 nm 1.3 0 0.011 0.00 0.00 0.030 0.000 0.00000 0.00000 0.000 861.37 4/10/14 on 1,123 2996.5 23,283 500 1.44 0.80 nm 0.8 0 0.022 0.00 0.00 0.011 0.000 0.00 0.00 0.000 861.41 4/25/14 off 1,138 2997.6 23,284 500 1.50 0.85 nm 1.1 0 0.281 0.00 0.00 0.006 0.004 0.00000 0.00000 0.004 861.41 5/1/14 off 1,144 3137.9 23,424 500 1.32 0.75 20.4 5.0 0 0.281 0.00 0.00 0.006 0.004 0.00000 0.00000 0.004 861.92 5/6/14 off 1,149 3258.1 23,544 0 0.00 0.00 nm 0.0 0 0.281 0.00 0.00 0.006 0.000 0.00000 0.00000 0.000 862.15 5/6/14 on at depart 1,149 3259.3 23,546 500 1.25 0.70 nm 3.6 0 0.281 0.00 0.00 0.006 0.004 0.00000 0.00000 0.004 862.15 5/9/14 on 1,152 3330.4 23,617 500 2.30 1.75 nm 4.8 0.019 0.540 0.00 0.00 0.00 0.007 0.00 0.00 0.007 862.53 5/9/14 off at depart 1,152 3331.5 23,618 0 0.00 0.00 nm 0.0 0 0.000 0.000 0.000 0.000 0.000 0.00000 0.00000 0.000 862.53 5/22/14 off 1,165 3331.5 23,618 0 0.00 0.00 nm 0.0 0 0.000 0.000 0.000 0.000 0.000 0.00000 0.00000 0.000 862.53 5/22/14 on at depart 1,165 3333.1 23,619 500 2.15 1.50 nm 1.3 0 0.770 0.007 0.000 0.007 0.010 0.00000 0.00000 0.010 862.54 5/30/14 off 1,173 3524.7 23,811 0 0.00 0.00 nm 0.0 0 0.770 0.007 0.000 0.007 0.000 0.00000 0.00000 0.000 863.51 5/30/14 on at depart 1,173 3526.1 23,812 500 2.20 1.53 nm 0.6 0 0.770 0.007 0.000 0.007 0.010 0.00000 0.00000 0.010 863.52 6/6/14 off 1,180 3689.6 23,976 0 0.00 0.00 nm 0.0 0 0.000 0.000 0.000 0.000 0.000 0.00000 0.00000 0.000 864.34 6/6/14 on at depart 1,180 3691.1 23,977 500 2.25 1.55 nm 3.1 0 0.770 0.007 0.000 0.007 0.010 0.00000 0.00000 0.010 864.35 6/13/14 on 1,187 3857.7 24,144 500 2.10 1.50 nm 1.8 0 0.770 0.007 0.000 0.007 0.010 0.00000 0.00000 0.010 866.03 6/13/14 off at depart 1,187 3859.6 24,146 0 0.00 0.00 nm 0.0 0 0.000 0.000 0.000 0.000 0.000 0.00000 0.00000 0.000 866.04 6/26/14 off 1,200 3859.6 24,146 0 0.00 0.00 nm 0.0 0 0.770 0.007 0.000 0.007 0.000 0.00 0.00 0.000 866.04 6/26/14 on 1,200 3861.1 24,147 500 2.55 2.02 nm 1.9 0.019 1.0 0.013 0.00 0.014 0.013 0.00 0.00 0.013 866.05 6/26/14 off at depart 1,200 3861.1 24,147 0 0.00 0.00 nm 0.0 0 0.0 0.000 0.00 0.000 0.000 0.00000 0.00000 0.000 866.05 8/4/14 off 1,239 3861.1 24,147 0 0.00 0.00 0.0 0.0 0 0.0 0.000 0.000 0.000 0.000 0.00000 0.00000 0.000 866.05 8/4/14 on at depart 1,239 3863.1 24,149 500 2.48 1.88 17.7 0.0 0 3.5 0.095 0.028 0.017 0.046 0.013 0.00 0.059 866.11 E2C Remediation Table 6-3 Project Number: 1950BK26 December 15, 2017 Operational Cumulative Hour Cumulative Inlet Status Calendar Meter Operating Flow System Wellfield Influent Effluent PCE TCE**cis-1,2-DCE Other VOCs PCE TCE**cis-1,2-DCE Total on Arrival Days Reading Hours (scfm)(%)(ppmV)(ppmV)(lbs) South Lake Tahoe, California Cumulative VOCs Extracted Influent Oxygen ContentDate Monitored (ppmV) TABLE 6 SUMMARY OF SVE/GAS REMEDIATION SYSTEM OPERATIONAL DATALake Tahoe Laundry Works1024 Lake Tahoe Boulevard (lbs/hr) VOCs ExtractedField Vapor Total VOCsVacuum (in-Hg) Lab Vapor Influent 8/13/14 off 1,248 4069.9 24,356 0 0.00 0.00 0.0 0.0 0 2.220 0.053 0.014 0.009 0.000 0.00000 0.00000 0.000 872.20 8/13/14 on at depart 1,248 4071.2 24,358 500 2.04 1.53 20.2 0.0 0 0.94 0.011 0.000 0.000 0.012 0.013 0.00 0.025 872.21 8/20/14 on 1,255 4240.5 24,527 500 1.71 1.29 nm 0.0 n/a 0.555 0.006 0.000 0.000 0.007 0.00000 0.00 0.007 874.97 8/25/14 on 1,260 4361.7 24,648 500 1.55 1.18 nm 0.0 n/a 0.555 0.006 0.000 0.000 0.007 0.00000 0.00 0.007 875.85 9/3/14 off 1,269 4578.3 24,865 0 0.00 0.00 n/a 0.0 n/a 0.555 0.006 0.000 0.000 0.000 0.00000 0.00 0.000 876.64 9/3/14 on at depart 1,269 4578.3 24,865 500 1.35 0.96 nm 1.8 n/a 0.555 0.006 0.000 0.000 0.007 0.00000 0.00 0.007 876.64 9/8/14 on 1,274 4698.1 24,984 500 1.40 1.03 nm 0.0 n/a 0.555 0.006 0.000 0.000 0.007 0.00000 0.00 0.007 877.51 9/17/14 on 1,283 4912.9 25,199 500 1.31 0.88 20.9 0.0 n/a 0.555 0.006 0.000 0.000 0.007 0.00000 0.00 0.007 879.08 9/22/14 on 1,288 5033.8 25,320 500 1.28 0.89 20.9 0.0 n/a 0.555 0.006 0.000 0.000 0.007 0.00000 0.00 0.007 879.96 10/10/14 on 1,306 5464.9 25,751 500 1.45 1.15 nm 1.1 n/a 0.555 0.006 0.000 0.000 0.007 0.00000 0.00 0.007 883.09 10/17/14 on 1,313 5636.0 25,922 500 1.45 1.15 nm 0.0 n/a 0.555 0.006 0.000 0.000 0.007 0.00000 0.00 0.007 884.34 10/24/14 on 1,320 5796.8 26,083 500 1.45 1.15 nm 1.7 n/a 0.170 0.000 0.000 0.000 0.002 0.000 0.00 0.002 885.10 11/3/14 on 1,330 6040.0 26,326 500 1.45 1.15 nm 1.1 n/a 0.140 0.000 0.000 0.000 0.002 0.00 0.00 0.002 885.60 11/7/14 off 1,334 6041.0 26,327 500 2.83 2.10 nm 1.3 n/a 0.140 0.000 0.000 0.000 0.002 0.00 0.00 0.002 885.60 11/14/14 on 1,341 6205.2 26,492 500 2.17 1.60 nm 1.0 n/a 0.140 0.000 0.000 0.000 0.002 0.00 0.00 0.002 885.90 11/14/14 on 1,341 6266.8 26,553 500 2.71 1.94 nm 1.0 n/a 0.140 0.000 0.000 0.000 0.002 0.00 0.00 0.002 886.01 11/20/14 on 1,347 6347.2 26,634 500 2.31 1.75 nm 1.6 n/a 0.140 0.000 0.000 0.000 0.002 0.00 0.00 0.002 886.16 11/20/14 on 1,347 6347.9 26,634 500 2.34 1.77 nm 2.1 n/a 0.140 0.000 0.000 0.000 0.002 0.00 0.00 0.002 886.16 11/26/14 on 1,353 6485.9 26,772 500 2.35 1.73 nm 2.3 n/a 0.140 0.000 0.000 0.000 0.002 0.00 0.00 0.002 886.41 11/26/14 on 1,353 6487.3 26,774 500 2.32 1.70 nm 2.1 n/a 0.11 0.000 0.000 0.000 0.001 0.000 0.00 0.001 886.42 12/3/14 off 1,360 6657.3 26,944 0 0.00 0.00 nm 0.0 n/a 0.215 0.000 0.000 0.000 0.000 0.00 0.00 0.000 886.54 12/3/14 on 1,360 6658.4 26,945 500 2.50 1.75 nm 1.7 n/a 0.32 0.000 0.000 0.000 0.004 0.000 0.00 0.004 886.54 12/9/14 on 1,366 6797.1 27,083 500 2.20 1.75 nm 1.0 n/a 0.220 0.00 0.00 0.000 0.003 0.00 0.00 0.003 887.03 12/9/14 on 1,366 6802.4 27,089 500 2.20 1.75 nm 1.1 n/a 0.220 0.00 0.00 0.000 0.003 0.00 0.00 0.003 887.05 12/16/14 ofvf 1,373 6960.0 27,246 0 0.00 0.00 nm 0.0 n/a 0.220 0.00 0.00 0.000 0.000 0.00 0.00 0.000 887.27 12/16/14 on 1,373 6960.0 27,246 500 2.35 1.77 nm 2.3 n/a 0.220 0.00 0.00 0.000 0.003 0.00 0.00 0.003 887.27 12/29/14 on 1,386 7266.1 27,552 500 2.54 1.84 nm 2.2 n/a 0.220 0.00 0.00 0.000 0.003 0.00 0.00 0.003 888.16 12/29/14 on 1,386 7267.6 27,554 500 2.54 1.84 nm 2.3 n/a 0.220 0.00 0.00 0.000 0.003 0.00 0.00 0.003 888.16 1/8/15 on 1,396 7505.9 27,792 500 2.52 2.02 nm 2.2 n/a 0.220 0.00 0.00 0.000 0.003 0.00 0.00 0.003 888.85 1/16/15 on 1,404 7694.8 27,981 500 2.02 1.50 nm 1.1 n/a 0.220 0.00 0.00 0.000 0.003 0.00 0.00 0.003 889.39 1/22/15 on 1,410 7838.9 28,125 500 2.02 1.54 nm 1.1 n/a 0.12 0.00 0.00 0.000 0.002 0.000 0.00 0.002 889.71 1/30/15 on 1,418 8029.3 28,316 500 2.10 1.55 nm 2.1 n/a 0.100 0.00 0.00 0.000 0.001 0.00 0.00 0.001 889.99 2/3/15 on 1,422 8126.1 28,412 500 2.13 1.62 nm 1.9 n/a 0.100 0.00 0.00 0.000 0.001 0.00 0.00 0.001 890.11 2/9/15 on 1,428 8270.4 28,557 500 2.72 2.21 nm 2.1 n/a 0.100 0.00 0.00 0.000 0.001 0.00 0.00 0.001 890.30 2/17/15 on 1,436 8460.1 28,746 500 2.30 1.96 nm 2.0 n/a 0.100 0.00 0.00 0.000 0.001 0.00 0.00 0.001 890.55 2/24/15 on 1,443 8630.1 28,916 500 2.37 1.88 nm 1.1 n/a 0.100 0.00 0.00 0.000 0.001 0.00 0.00 0.001 890.77 3/2/15 on 1,449 8774.8 29,061 500 2.35 1.86 nm 2.0 n/a 0.100 0.00 0.00 0.000 0.001 0.00 0.00 0.001 890.96 3/10/15 on 1,457 8966.3 29,253 500 2.25 1.75 nm 1.0 n/a 0.100 0.00 0.00 0.000 0.001 0.00 0.00 0.001 891.21 3/17/15 on 1,464 9132.0 29,418 500 2.07 1.75 nm 1.1 n/a 0.079 0.00 0.00 0.000 0.001 0.000 0.00 0.001 891.40 3/27/15 on 1,474 9370.9 29,657 500 2.13 1.69 nm 1.8 n/a 0.123 0.00 0.00 0.000 0.002 0.000 0.00 0.002 891.72 3/31/15 on 1,478 9467.7 29,754 500 2.21 1.64 nm 1.7 n/a 0.123 0.00 0.00 0.000 0.002 0.000 0.00 0.002 891.88 4/8/15 on 1,486 9655.5 29,942 500 2.21 1.69 nm 2.7 n/a 0.123 0.00 0.00 0.000 0.002 0.000 0.00 0.002 892.18 4/8/15 on 1,486 9657.2 29,944 500 2.21 1.69 nm 2.5 n/a 0.123 0.00 0.00 0.000 0.002 0.000 0.00 0.002 892.18 4/17/15 on 1,495 9874.1 30,160 500 2.17 1.64 nm 3.0 n/a 0.087 0.00 0.00 0.028 0.0011 0.000 0.00 0.001 892.48 4/17/15 on 1,495 9875.7 30,162 500 2.17 1.64 nm 2.8 n/a 0.087 0.00 0.00 0.028 0.0011 0.000 0.00 0.001 892.48 4/23/15 on 1,501 10016.8 30,303 500 2.00 1.53 nm 1.0 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 892.68 4/23/15 on 1,501 10018.3 30,305 500 2.00 1.53 nm 1.0 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 892.69 4/29/15 on 1,507 10156.8 30,443 500 2.25 1.70 nm 1.0 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 892.93 4/29/15 on 1,507 10157.9 30,444 500 2.25 1.70 nm 1.1 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 892.93 5/4/15 on 1,512 10281.1 30,567 500 2.07 1.60 nm 1.0 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 893.14 5/4/15 on 1,512 10281.1 30,567 500 2.09 1.63 nm 1.0 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 893.14 5/11/15 on 1,519 10442.8 30,729 500 2.14 1.66 nm 1.0 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 893.43 5/11/15 on 1,519 10444.4 30,731 500 2.12 1.65 nm 1.0 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 893.43 5/19/15 on 1,527 10634.7 30,921 500 2.21 1.77 nm 1.9 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 893.76 5/19/15 on 1,527 10636.0 30,922 500 2.21 1.77 nm 1.6 n/a 0.133 0.00 0.00 0.028 0.0017 0.000 0.00 0.002 893.76 5/27/15 on 1,535 10822.7 31,109 500 2.10 1.60 nm 1.7 n/a 0.092 0.00 0.00 0.00 0.001 0.000 0.00 0.001 894.04 5/27/15 on 1,535 10824.3 31,111 500 2.13 1.63 nm 1.4 n/a 0.092 0.00 0.00 0.00 0.001 0.000 0.00 0.001 894.04 E2C Remediation Table 6-4 Project Number: 1950BK26 December 15, 2017 Operational Cumulative Hour Cumulative Inlet Status Calendar Meter Operating Flow System Wellfield Influent Effluent PCE TCE**cis-1,2-DCE Other VOCs PCE TCE**cis-1,2-DCE Total on Arrival Days Reading Hours (scfm)(%)(ppmV)(ppmV)(lbs) South Lake Tahoe, California Cumulative VOCs Extracted Influent Oxygen ContentDate Monitored (ppmV) TABLE 6 SUMMARY OF SVE/GAS REMEDIATION SYSTEM OPERATIONAL DATALake Tahoe Laundry Works1024 Lake Tahoe Boulevard (lbs/hr) VOCs ExtractedField Vapor Total VOCsVacuum (in-Hg) Lab Vapor Influent 6/4/15 on 1,543 11014.0 31,300 500 2.07 1.59 nm 1.3 n/a 0.102 0.00 0.00 0.000 0.001 0.000 0.00 0.001 894.28 6/4/15 on 1,543 11015.8 31,302 500 2.08 1.59 nm 1.1 n/a 0.102 0.00 0.00 0.000 0.001 0.000 0.00 0.001 894.28 6/9/15 on 1,548 11130.1 31,416 500 2.04 1.57 nm 0.7 n/a 0.102 0.00 0.00 0.000 0.001 0.000 0.00 0.001 894.44 6/9/15 on 1,548 11131.3 31,418 500 2.06 1.58 nm 0.5 n/a 0.102 0.00 0.00 0.000 0.001 0.000 0.00 0.001 894.44 6/15/15 on 1,554 11271.2 31,558 500 2.13 1.67 nm 0.4 n/a 0.102 0.00 0.00 0.000 0.001 0.000 0.00 0.001 894.62 6/15/15 on 1,554 11272.8 31,559 500 2.16 1.68 nm 0.5 n/a 0.102 0.00 0.00 0.000 0.001 0.000 0.00 0.001 894.63 6/22/15 on 1,561 11439.2 31,726 500 2.07 1.60 nm 0.4 n/a 0.02 0.00 0.00 0.00 0.0003 0.000 0.00 0.000 894.76 6/22/15 on 1,561 11440.9 31,727 500 2.10 1.64 nm 0.3 n/a 0.02 0.00 0.00 0.00 0.0003 0.000 0.00 0.000 894.76 6/29/15 on 1,568 11598.6 31,885 500 0.00 1.58 nm 0.0 n/a 0.02 0.00 0.00 0.000 0.0003 0.000 0.00 0.000 894.80 6/29/15 on 1,568 11600.2 31,887 500 0.00 2.07 nm 0.9 n/a 0.02 0.00 0.00 0.000 0.0003 0.000 0.00 0.000 894.80 7/6/15 on 1,575 11765.0 32,051 500 2.00 1.50 nm 0.7 n/a 0.02 0.00 0.00 0.000 0.0003 0.000 0.00 0.000 894.85 7/6/15 on 1,575 11767.7 32,054 500 2.04 1.53 nm 0.5 n/a 0.02 0.00 0.00 0.000 0.0003 0.000 0.00 0.000 894.85 7/13/15 off 1,582 11931.0 32,217 0 0.00 0.00 nm 0.0 n/a 0.00 0.00 0.00 0.000 0.0000 0.000 0.00 0.000 894.87 7/13/15 on 1,582 11931.0 32,217 500 1.97 1.50 nm 0.5 n/a 0.02 0.00 0.00 0.000 0.0003 0.000 0.00 0.000 894.87 7/21/15 off 1,590 12110.7 32,397 0 0.00 0.00 nm 0.0 n/a 0.00 0.00 0.00 0.000 0.0000 0.000 0.00 0.000 894.89 10/12/15 off 1,673 12112.8 32,399 237 1.55 1.38 nm 140.0 n/a 2.40 0.089 0.098 1.252 0.0149 0.0004 0.0005 0.016 894.91 10/23/15 on 1,684 12372.0 32,658 235 1.75 1.51 nm 4.3 n/a 2.40 0.089 0.098 1.252 0.0148 0.0004 0.0005 0.016 899.00 11/4/15 on 1,696 12656.6 32,943 233 2.00 1.80 nm 3.9 n/a 2.40 0.089 0.098 1.252 0.0147 0.0004 0.0005 0.016 903.45 11/12/15 on 1,704 12852.9 33,139 232 2.10 1.95 nm 4.1 n/a 2.40 0.089 0.098 1.252 0.0146 0.0004 0.0005 0.016 906.51 11/20/15 on 1,712 13047.2 33,334 233 2.05 1.90 nm 5.0 n/a 2.40 0.089 0.098 1.252 0.0147 0.0004 0.0005 0.016 909.53 11/23/15 on 1,715 13118.0 33,404 233 2.00 1.80 nm 3.1 n/a 0.20 0.000 0.00 0.00 0.0012 0.0000 0.0000 0.001 910.12 11/30/15 off 1,722 13286.0 33,572 234 1.97 2.19 nm 3.4 n/a 0.20 0.000 0.000 0.000 0.0012 0.0000 0.0000 0.001 910.33 12/8/15 off 1,730 13475.8 33,762 231 2.25 2.05 nm 1.9 n/a 0.20 0.000 0.000 0.000 0.0012 0.0000 0.0000 0.001 910.56 12/18/15 off 1,740 13706.3 33,993 228 2.63 2.38 nm 1.6 n/a 0.20 0.000 0.000 0.000 0.0012 0.0000 0.0000 0.001 910.84 12/23/15 off 1,745 13825.7 34,112 222 3.41 3.32 nm 1.4 n/a 0.00 0.000 0.00 0.00 0.0000 0.0000 0.0000 0.000 910.91 12/30/15 on 1,752 13989.4 34,276 224 3.15 3.00 nm 1.3 n/a 0.00 0.000 0.00 0.000 0.0000 0.0000 0.0000 0.000 910.91 1/4/16 off 1,757 13993.4 34,280 227 2.70 2.52 nm 1.1 n/a 0.00 0.000 0.00 0.000 0.0000 0.0000 0.0000 0.000 910.91 1/11/16 on 1,764 14157.1 34,443 229 2.55 2.47 nm 1.1 n/a 0.00 0.000 0.00 0.000 0.0000 0.0000 0.0000 0.000 910.91 1/12/16 off 1,765 14158.8 34,445 226 2.84 2.72 nm 1.4 n/a 0.00 0.000 0.00 0.000 0.0000 0.0000 0.0000 0.000 910.91 1/21/16 off 1,774 14364.4 34,651 228 2.69 2.47 nm 1.3 n/a 0.00 0.000 0.00 0.000 0.0000 0.0000 0.0000 0.000 910.91 1/26/16 off 1,779 14484.1 34,770 220 3.59 3.35 nm 1.5 n/a 2.2 0.013 0.00 0.00 0.0127 0.0001 0.0000 0.013 911.67 2/1/16 off 1,785 14626.5 34,913 213 4.40 4.30 nm 1.4 n/a 2.20 0.013 0.000 0.00 0.0123 0.0001 0.0000 0.012 913.46 2/11/16 on 1,795 14866.9 35,153 210 4.75 4.63 nm 1.3 n/a 2.20 0.013 0.000 0.00 0.0121 0.0001 0.0000 0.012 916.41 2/15/16 on 1,799 14962.7 35,249 217 4.00 3.84 nm 0.9 n/a 2.20 0.013 0.000 0.00 0.0125 0.0001 0.0000 0.013 917.59 2/22/16 on 1,806 15131.8 35,418 213 4.45 4.21 nm 1.0 n/a 0.24 0.000 0.00 0.00 0.0013 0.0000 0.0000 0.001 918.77 3/1/16 on 1,814 15322.3 35,609 217 4.00 3.80 nm 0.3 n/a 0.24 0.000 0.00 0.00 0.0014 0.0000 0.0000 0.001 919.02 3/10/16 off 1,823 15534.6 35,821 219 3.75 3.50 nm 0.5 n/a 0.24 0.000 0.00 0.00 0.0014 0.0000 0.0000 0.001 919.31 3/14/16 off 1,827 15626.3 35,913 208 5.00 4.80 nm 3.4 n/a 0.24 0.000 0.00 0.00 0.0013 0.0000 0.0000 0.001 919.44 3/25/16 off 1,838 15890.5 36,177 209 4.90 4.80 nm 1.9 n/a 0.24 0.000 0.00 0.00 0.0013 0.0000 0.0000 0.001 919.78 3/30/16 off 1,843 16009.2 36,296 210 4.76 4.61 nm 1.2 n/a 1.1 0.015 0.00 0.00 0.0061 0.0001 0.0000 0.006 920.23 4/8/16 off 1,852 16218.4 36,505 225 3.00 2.80 nm 1.9 n/a 1.10 0.015 0.0065 0.0001 0.0000 0.007 921.55 4/13/16 on 1,857 16339.9 36,626 222 3.35 3.17 nm 1.2 n/a 1.10 0.015 0.0064 0.0001 0.0000 0.006 922.34 4/19/16 on 1,863 16480.8 36,767 224 3.15 3.05 nm 1.2 n/a 1.10 0.015 0.0065 0.0001 0.0000 0.007 923.26 4/26/16 off 1,870 16646.8 36,933 220 3.54 3.37 nm 1.7 n/a 0.35 0.00 0.00 0.00 0.0020 0.0000 0.0000 0.002 923.97 5/2/16 off 1,876 16792.1 37,078 234 1.92 2.07 nm 3.1 n/a 0.35 0.00 0.00 0.00 0.0021 0.0000 0.0000 0.002 924.27 5/9/16 on 1,883 16959.9 37,246 232 2.10 1.91 nm 2.1 n/a 0.35 0.00 0.00 0.00 0.0021 0.0000 0.0000 0.002 924.63 5/20/16 on 1,894 17220.7 37,507 242 0.90 0.69 nm 0.5 n/a 0.35 0.00 0.00 0.00 0.0022 0.0000 0.0000 0.002 925.20 5/25/16 on 1,899 17341.8 37,628 242 0.91 0.70 nm 0.8 n/a 0.18 0.00 0.00 0.00 0.0011 0.0000 0.0000 0.001 925.40 6/3/16 on 1,908 17555.9 37,842 242 0.90 0.71 nm 0.3 n/a 0.18 0.00 0.00 0.000 0.0011 0.0000 0.0000 0.001 925.65 6/8/16 on 1,913 17677.1 37,963 242 0.93 0.73 nm 0.5 n/a 0.18 0.00 0.00 0.000 0.0011 0.0000 0.0000 0.001 925.79 6/17/16 on 1,922 17891.9 38,178 243 0.86 0.63 nm 0.3 n/a 0.18 0.00 0.00 0.000 0.0011 0.0000 0.0000 0.001 926.03 6/21/16 off 1,926 17971.8 38,258.1 243 0.82 0.61 nm 0.3 n/a 0.57 0.00 0.00 0.00 0.0036 0.0000 0.0000 0.004 926.22 6/30/16 on 1,935 2049.0 38,474 243 0.82 0.61 nm 0.2 n/a 0.57 0.000 0.000 0.000 0.0036 0.0000 0.0000 0.004 927.01 7/8/16 on 1,943 2240.7 38,666 243 0.81 0.59 nm 0.2 n/a 0.57 0.000 0.000 0.000 0.0036 0.0000 0.0000 0.004 927.70 7/15/16 on 1,950 2409.5 38,835 244 0.77 0.59 nm 0.3 n/a 0.57 0.000 0.000 0.000 0.0036 0.0000 0.0000 0.004 928.32 7/21/16 on 1,956 2553.8 38,979 244 0.73 0.52 nm 0.3 n/a 0.57 0.000 0.000 0.000 0.0036 0.0000 0.0000 0.004 928.84 7/27/16 on 1,962 2697.7 39,123 244 0.75 0.50 nm 0.9 n/a 0.35 0.00 0.00 0.04 0.0022 0.0000 0.0000 0.002 929.27 8/1/16 on 1,967 2818.5 39,244 244 0.71 0.50 nm 0.3 n/a 0.35 0.0022 0.0000 0.0000 0.002 929.54 E2C Remediation Table 6-5 Project Number: 1950BK26 December 15, 2017 Operational Cumulative Hour Cumulative Inlet Status Calendar Meter Operating Flow System Wellfield Influent Effluent PCE TCE**cis-1,2-DCE Other VOCs PCE TCE**cis-1,2-DCE Total on Arrival Days Reading Hours (scfm)(%)(ppmV)(ppmV)(lbs) South Lake Tahoe, California Cumulative VOCs Extracted Influent Oxygen ContentDate Monitored (ppmV) TABLE 6 SUMMARY OF SVE/GAS REMEDIATION SYSTEM OPERATIONAL DATALake Tahoe Laundry Works1024 Lake Tahoe Boulevard (lbs/hr) VOCs ExtractedField Vapor Total VOCsVacuum (in-Hg) Lab Vapor Influent 8/12/16 on 1,978 3081.1 39,506 244 0.71 0.50 nm 0.2 n/a 0.35 0.0022 0.0000 0.0000 0.002 930.13 8/25/16 on 1,991 3391.0 39,816 246 0.44 0.44 nm 0.5 n/a 0.35 0.0023 0.0000 0.0000 0.002 930.82 8/19/16 on 1,985 3246.3 39,671 246 0.44 0.44 nm 0.8 n/a 0.35 0.0023 0.0000 0.0000 0.002 930.50 9/15/16 on 2,012 3900.7 40,326 244 0.73 0.51 nm 0.5 n/a 0.51 0.00 0.00 0.00 0.0033 0.0000 0.0000 0.003 932.30 9/28/16 on 2,025 4207.8 40,633 246 0.44 0.44 nm 0.6 n/a 0.51 0.000 0.000 0.000 0.0033 0.0000 0.0000 0.003 933.31 10/10/16 on 2,037 4495.9 40,921 246 0.44 0.44 nm 1.5 n/a 0.05 0.000 0.000 0.000 0.0003 0.0000 0.0000 0.000 933.83 10/19/16 on 2,046 4710.6 41,136 245 0.64 0.60 nm ---n/a 0.51 0.000 0.000 0.000 0.0033 0.0000 0.0000 0.003 934.22 10/27/16 on 2,054 4901.6 41,327 246 0.44 0.44 nm 5.0 n/a 0.51 0.000 0.000 0.000 0.0033 0.0000 0.0000 0.003 934.84 10/31/16 on 2,058 4996.0 41,421 244 0.73 0.73 nm 0.0 n/a 0.075 0.00 0.00 0.00 0.0005 0.0000 0.0000 0.000 935.02 11/9/16 on 2,067 5215.5 41,641 244 0.73 0.73 nm 0.0 n/a 0.08 0.000 0.000 0.000 0.0005 0.0000 0.0000 0.000 935.13 11/18/16 on 2,076 5430.9 41,856 244 0.73 0.73 20.9 0.0 n/a 0.08 0.000 0.000 0.000 0.0005 0.0000 0.0000 0.000 935.23 11/21/16 on 2,079 5502.5 41,928 243 0.81 0.81 nm 0.3 n/a 0.08 0.000 0.000 0.000 0.0005 0.0000 0.0000 0.000 935.27 12/1/16 on 2,089 5742.4 42,168 243 0.85 0.85 nm 0.2 n/a 0.053 0.00 0.00 0.00 0.0003 0.0000 0.0000 0.000 935.36 12/16/16 on 2,104 6102.1 42,527 243 0.80 0.80 nm 0.2 n/a 0.05 0.000 0.000 0.000 0.0003 0.0000 0.0000 0.000 935.48 12/20/16 on 2,108 6199.0 42,624 240 1.16 1.16 nm 0.1 n/a 0.05 0.000 0.000 0.000 0.0003 0.0000 0.0000 0.000 935.52 1/6/17 on 2,125 6607.4 43,033 238 1.40 1.40 nm 0.0 n/a 0.072 0.00 0.00 0.00 0.0004 0.0000 0.0000 0.000 935.68 1/13/17 on 2,132 6773.4 43,199 234 1.90 1.90 nm 0.1 n/a 0.07 0.000 0.000 0.000 0.0004 0.0000 0.0000 0.000 935.75 1/17/17 on 2,136 6870.3 43,295 235 1.75 1.75 nm 0.1 n/a 0.07 0.000 0.000 0.000 0.0004 0.0000 0.0000 0.000 935.79 1/27/17 on 2,146 7108.0 43,533 236 1.65 1.65 nm 0.1 n/a 0.07 0.000 0.000 0.000 0.0004 0.0000 0.0000 0.000 935.90 1/31/17 on 2,150 7206.8 43,632 237 1.50 1.50 nm 0.1 n/a 0.07 0.000 0.000 0.000 0.0004 0.0000 0.0000 0.000 935.94 2/9/17 on 2,159 7422.4 43,848 247 0.31 0.31 nm 0.3 n/a 0.07 0.000 0.000 0.000 0.0005 0.0000 0.0000 0.000 936.04 2/14/17 on 2,164 7542.6 43,968 247 0.30 0.30 nm 0.1 n/a 0.07 0.000 0.000 0.000 0.0005 0.0000 0.0000 0.000 936.10 2/27/17 on 2,177 7853.1 44,278 248 0.29 0.23 nm 0.1 n/a 0.07 0.000 0.000 0.000 0.0005 0.0000 0.0000 0.000 936.24 3/7/17 on 2,185 8044.7 44,470 248 0.26 0.26 nm 0.2 n/a 0.07 0.000 0.000 0.000 0.0005 0.0000 0.0000 0.000 936.33 3/15/17 on 2,193 8235.6 44,661 248 0.29 0.29 nm 0.2 n/a 0.076 0.00 0.00 0.00 0.0005 0.0000 0.0000 0.000 936.43 3/20/17 on 2,198 8356.4 44,782 246 0.44 0.44 nm 0.1 n/a 0.08 0.000 0.000 0.000 0.0005 0.0000 0.0000 0.000 936.48 3/29/17 Off 2,207 8572.8 44,998 0 ------nm ---n/a 0.08 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.54 3/30/17 Off 2,208 8573.7 44,999 225 3.00 3.00 nm 0.1 n/a 0.08 0.000 0.000 0.000 0.0004 0.0000 0.0000 0.000 936.54 4/3/17 on 2,212 8667.8 45,093 225 3.00 3.00 nm 0.1 n/a 0.08 0.000 0.000 0.000 0.0004 0.0000 0.0000 0.000 936.58 4/14/17 on 2,223 8932.1 45,357 225 3.00 3.00 nm 0.1 n/a 0.08 0.000 0.000 0.000 0.0004 0.0000 0.0000 0.000 936.70 4/19/17 on 2,228 9056.8 45,482 229 2.50 2.50 nm 0.0 n/a 0.08 0.000 0.000 0.000 0.0005 0.0000 0.0000 0.000 936.76 4/25/17 on 2,234 9199.1 45,624 230 2.40 2.40 nm 0.2 n/a 0.000 0.00 0.00 0.00 0.0000 0.0000 0.0000 0.000 936.79 5/4/17 on 2,243 9363.8 45,789 225 3.00 3.00 nm 0.2 n/a 0.00 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.79 5/10/17 on 2,249 9508.3 45,933 225 3.00 3.00 nm 0.1 n/a 0.00 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.79 5/17/17 on 2,256 9676.4 46,102 224 3.10 3.10 nm 0.1 n/a 0.00 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.79 5/25/17 on 2,264 9867.3 46,292 225 3.00 3.00 nm 0.1 n/a 0.000 0.00 0.00 0.00 0.0000 0.0000 0.0000 0.000 936.79 5/30/17 on 2,269 9986.2 46,411 225 3.00 3.00 nm 0.0 n/a 0.00 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.79 6/12/17 on 2,282 10298.4 46,724 225 3.00 3.00 nm 0.0 n/a 0.00 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.79 6/22/17 on 2,292 10540.9 46,966 225 3.00 3.00 nm 0.0 n/a 0.00 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.79 7/7/17 on 2,307 10897.1 47,322 225 3.00 3.00 nm 0.1 n/a 0.00 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.79 7/12/17 on 2,312 11014.9 47,440 225 3.00 3.00 nm 0.0 n/a 0.00 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.79 7/19/17 on 2,319 11183.0 47,608 225 3.00 3.00 nm 0.0 n/a 0.00 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.000 936.79 7/28/17 on 2,328 11400.7 47,826 225 3.00 3.00 nm 0.0 n/a 0.016 0.00 0.00 0.00 0.0001 0.0000 0.0000 0.000 936.80 8/2/17 on 2,333 11522.8 47,948 225 3.00 3.00 nm 0.0 n/a 0.02 0.000 0.000 0.000 0.0001 0.0000 0.0000 0.000 936.81 8/11/17 on 2,342 11735.9 48,161 226 2.90 2.90 nm 0.0 n/a 0.02 0.000 0.000 0.000 0.0001 0.0000 0.0000 0.000 936.83 8/18/17 on 2,349 11906.3 48,331 225 3.00 3.00 nm 0.0 n/a 0.02 0.000 0.000 0.000 0.0001 0.0000 0.0000 0.000 936.85 8/25/17 on 2,356 12071.4 48,497 227 2.80 2.80 nm 0.0 n/a 0.02 0.000 0.000 0.000 0.0001 0.0000 0.0000 0.000 936.86 8/29/17 Off 2,360 12172.6 48,598 227 Power Off nm nm nm n/a 0.02 0.000 0.000 0.000 0.0001 0.0000 0.0000 0.000 936.87 E2C Remediation Table 6-6 Project Number: 1950BK26 December 15, 2017 Operational Cumulative Hour Cumulative Inlet Status Calendar Meter Operating Flow System Wellfield Influent Effluent PCE TCE**cis-1,2-DCE Other VOCs PCE TCE**cis-1,2-DCE Total on Arrival Days Reading Hours (scfm)(%)(ppmV)(ppmV)(lbs) South Lake Tahoe, California Cumulative VOCs Extracted Influent Oxygen ContentDate Monitored (ppmV) TABLE 6 SUMMARY OF SVE/GAS REMEDIATION SYSTEM OPERATIONAL DATALake Tahoe Laundry Works1024 Lake Tahoe Boulevard (lbs/hr) VOCs ExtractedField Vapor Total VOCsVacuum (in-Hg) Lab Vapor Influent Notes:0.017 0.00038 0.00028 0.017 -- = Data not available / not recorded cis-1,2-DCE = cis-1,2-Dichloroethene in-Hg = Inches of Mercury Lbs./Hr. = Pounds per hour nm = Not measured ND = Not detected at or above the method detection limit PCE = Tetrachloroethene ppmV = Parts per million by volume scfm = Standard cubic feet per minute SVE/GASS = Soil Vapor Extraction / Groundwater Air Sparge System TCE = Trichloroethene VOCs = Volatile Organic Compounds (primarily tetrachloroethylene and trichloroethylene) 3/29/12 - Attempted to replace the broken seal; however, the part failed; had to order a new one (back-ordered) 4/18/12- Fix seal on compressor; change compressor and blower oil 4/26/12- High water upon arrival (system off); system off on departure; tech to empty water and restart system 5/1/12- Added air sparge to water and opened dilution air to drop VAC and collect vapors 5/8/12- Changed AS manifold and closed off wells at east end of field near compound 3/8/12 - Attempted to repair seal; however, wrong parts were delivered 2/17/12 - System off on arrival due to high water 5/23/12- Reduced dilution air; raised VAC from 2.35 to 3 in-Hg 6/8/12 - System off on arrival due to high water 6/14/12- turned system off..all PVC going to carbon and inbetween carbons melted from high temp. 6/21/12- replaced plumbing for carbon; added pressure switch between blower and carbon; added vent and therm. 9/15/11 - System off on arrival due to power outage 10/26/11 - System shut off due to carbon back pressure 11/30/11 - Carbon changeout, restart system 12/9/11 - System off on arrival due to power outage 5/14/12- Shut off AS-14,15,16 to focus near MW-1S 1/17/12 - System off on arrival due to power outage 1/25/12 - System off on arrival due to power outage 2/3/12 - System off on arrival due to power outage 2/9/12 - System off on arrival due to power outage 3/5/12 - Snow conditions finally were conducive to remove water; also, attempted to fix an oil leak, which was a broken seal; seal was back-ordered 5/11/11 - System off on arrival due to high water 7/12/11 - System off on arrival; high water 7/13/11 - Remove water and restart system 7/18/11 - System off on arrival due to power outage 8/31/11 - System off on arrival due to power outage 9/7/11 - System off on arrival due to power outage 9/23/10 - System off on arrival due to power outages 11/23/10 - System off on arrival due to power outages 12/1/10 - System off on arrival due to high water 1/4/11 - System off on arrival; power outage; also repaired knockout pot 4/6/11 - System off on arrival due to high water and would not start; off on departure 4/12/11 - System restarted System shut off on 4/10/14, with approval from CRWQCB, for 2 weeks on/2 weeks off cycling plan; system re- started on 4/25/14 ** = TCE mass removed includes 1,1,1-Trichloroethane, as their atomic weights are similar For mass removal calculations (lb/lb-mole) - PCE mass weight = 165.82, TCE = 131.39 and cis-1,2-DCE = 96.95 8/5/10 - Extensive wellfield optimization conducted 10/6/11 - Water tank emptied and system restarted 10/5/11 - System off on arrival due to full water tank Volatile Organic Compounds Removal Rate (lbs/hr) = Influent (ppmV) x 10-6 x Influent Flow Rate (scfm) x 1 lb-mole/379.5 ft3 x 165.82 (lb/lb-mole) x 60 (min/hour) System shut down for ozone sparging on 11/30/12; system restarted on 11/5/13 per CRWQCB directive, dated 11/1/13 Average Extraction Rate (lbs/Hr) E2C Remediation Table 6-7 Project Number: 1950BK26 December 15, 2017 Operational Cumulative Hour Cumulative Inlet Status Calendar Meter Operating Flow System Wellfield Influent Effluent PCE TCE**cis-1,2-DCE Other VOCs PCE TCE**cis-1,2-DCE Total on Arrival Days Reading Hours (scfm)(%)(ppmV)(ppmV)(lbs) South Lake Tahoe, California Cumulative VOCs Extracted Influent Oxygen ContentDate Monitored (ppmV) TABLE 6 SUMMARY OF SVE/GAS REMEDIATION SYSTEM OPERATIONAL DATALake Tahoe Laundry Works1024 Lake Tahoe Boulevard (lbs/hr) VOCs ExtractedField Vapor Total VOCsVacuum (in-Hg) Lab Vapor Influent 7/20/12 - System off on arrival due to power outage 7/26/12 - System off on arrival due to power outage; installed fan and additional vents to reduce heat inside building 8/16/12 - System off on arrival due to power outage 9/7/12 - System off on arrival due to high water 9/10/12 - Water removed for recycling 9/13/12 - System restarted 10/3/12 - System on on arrival, performed maintenance and recorded operational parameters; left system off on departure as carbon vessels needed re-plumbing 10/12/12 - Arrived and re-plumed carbon vessels; started system, recorded parameters; system running on departure 11/30/12 - System off on arrival due to power outage; restarted, recorded operational parameters, then shut down during storm period to not extract large volume of water during storms 12/18/12 - Installed and plumbed ozone unit to wells AS-1, AS-2, AS-3, AS-9, AS-7, AS-8 and AS-13; attempted to start; fuse problems requiring parts; ozone unit off on departure 11/5/13-11/15/13 - Air compressor hour meter reading used as system hour meter reading not functioning; replaced system hour meter on 11/15/13 12/10/13 - System shut-off for sampling and repairs to 4" pvc pipe (hairline crack at couple); restarted system before departure from site 12/27/13 - System off on arrival, possibly from a power outage; operating normally upon system startup; hour meter reading shows that system was only down for several hours before arrival to site 1/28/14 - System off on arrival; operated normally upon system startup 1/31/14 - System off on arrival due to possible power outage 2/18/14 - System off on arrival due to possible power outage 2/26/14 - Shut down system to make repairs to carbon system 2/28/14 - Completed repairs to carbon system, restarted; operated normally 3/6/14 - Shut down system to make additional repairs to carbon system 3/20/14 - Completed repairs to carbon system, restarted; operated normally 3/24/14 - System off on arrival due to possible power outage 4/4/14- System off on arrival due to power outage; restarted, measured parameters, left system on on departure 4/10/14 - System on at arrival, record parameters, then shut down for off cycling (2 weeks on/2 weeks off) 4/25/2014 - System was in off-cycling mode, restart system, recorded parameters and left on at departure 5/1/14 - System off on arrival due to power outage; restart and record parameters; left on at departure 5/6/14 - System off on arrival, likely due to high temp; restarted system, recorded parameters and left on at departure 5/9/14 - System running on arrival; perform O&M, shut down for cycling 5/22/14 - Off for off-cycling on arrival; restart for on-cycle period, recorde parameters; left on at departure 5/30/14 - Off on arrival, likely due to overheating related to high back-pressure in GAC; restart, record parameters, left on at departure 6/6/14 - Off on arrival due to thermal overload related to high back-pressxure in GAC; restsarted, recorded parameters, left on at departure 6/13/14 - System on on arrival, however, pressure switch had shut down due to thermal overload related to high back-presxsure in GAC; restarted, recorded parameters; had to leave off, could not keep running 6/26/14 - System off on arrival, same back-presxsure problem; restart and record measurements; left off on departure 8/4/14 - Replumbed to discharge directly to atmosphere; restarted syhstem; cleaned compound 8/13/14 - Off on arrival for unknown reason; restarted; on on departure 9/3/2014 - Off on arrival due to power outage; restarted 11/3/2014 - Left off on departure; reversed pullys on blower to get more efficient flow; blower motor burned up 11/7/2014 - Swapped out blower motor abd restarted 12/3/14 - Off on arrival due to power outage; changed pullies; changed blower oil; greased motor and blower; restarted 12/16/14 - Off on arrival due to power outage; restarted 2/3/15 - Air compressor off due to broken hose; replaced hose and restarted 6/29/15 - Off on arrival; possible power outage; restarted and left on at departure 7/13/15 - Off on arrival due to power outage; system restarted, parameters measured and system left on at departure 7/21/15 - Off on arrival; see Section 1.4 of report for detailed explanation 6/27/12- installed fan over compressor exhaust E2C Remediation Table 6-8 Project Number: 1950BK26 December 15, 2017 Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Date HVE-1 HVE-2 HVE-3 HVE-4 HVE-5 HVE-6 VES-1 VED-1 VES-2 VED-2 VES-3 VED-3 VES-4 VED-4 VES-5 VED-5 VES-6 VED-6 VES-7 VED-7 VES-8 VED-8 VES-9 VED-9 VES-10VED-10VES-11VED-11VES-12VED-12 VES-13VED-13VES-14VED-14VES-15VED-15VES-16VED-16VES-17VED-17VES-18VED-18VES-19VED-19 VES-20 VED-20 Monitored valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve 4/6/10 4/7/10 4/8/10 4/9/10 4/16/10 O O O O O O O O O PO O PO O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 4/29/10 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/6/10 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/12/10 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/1/10 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/15/10 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/24/10 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/2/10 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/15/10 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/22/10 O 1/2 1/2 O 1/2 O C O C O O O 1/2 O C C C C C 1/2 C C C C O O O C O C C 1/2 O 1/2 1/2 C 1/2 C C O 0 O O O O O 7/28/10 O 1/2 1/2 O 1/2 O C O C O O O 1/2 O C C C C C 1/2 C C C C O O O C O C C 1/2 O 1/2 1/2 C 1/2 C C O 0 O O O O O 8/5/10 1/2 1/2 1/2 1/2 1/2 O O O O O 1/2 1/2 1/2 O C C 1/2 C C C C C C C O O O C O O O C O C 1/2 C 1/2 C O O 0 O 1/2 1/2 O O 8/11/10 1/2 1/2 1/2 1/2 1/2 O O O O O 1/2 1/2 1/2 O C C 1/2 C C C C C C C O O O C O O O C O C 1/2 C 1/2 C O O 0 O 1/2 1/2 O O 8/18/10 20%1/2 O C O 1/2 O C O 1/2 O O 1/2 O C O C O 1/2 1/2 C 1/2 1/2 O O O O 1/2 1/2 O C C C C O 1/2 O O O O 1/2 1/2 O C O C 8/25/10 O O O 1/2 O 1/2 20%O O 1/2 O O 1/2 O O O C O C C 20%C C C 1/2 C O C O 20%20%O O 1/2 O 20%O 20%O 1/2 O 1/2 O O O O 9/3/10 O O O 1/2 O 1/2 20%O O 1/2 O O 1/2 O O O C O C C 20%C C C 1/2 C O C O 20%20%O O 1/2 O 20%O 20%O 1/2 O 1/2 O O O O 9/8/10 O O O 1/2 O 1/2 20%O O 1/2 O O 1/2 O O O C O C C 20%C C C 1/2 C O C O 20%20%O O 1/2 O 20%O 20%O 1/2 O 1/2 O O O O 9/15/10 O 1/2 O 1/2 1/2 20%C 1/2 C C O O 20%O C C C O C C C C C C 1/2 1/2 O 1/2 C C C C C C 1/2 1/2 O 1/2 C 1/2 C 20%O O O O 9/23/10 O 1/2 O 1/2 1/2 1/2 1/2 1/2 O 1/2 O O C O C C C O C C C C C C 1/2 1/2 O 1/2 C C C C C C C C O C C 1/2 C C O O O O 9/28/10 O 1/2 O 1/2 O 1/2 1/2 O O O O O C O C C C O C 20%C C C C 1/2 1/2 O 1/2 C C C C C 1/2 C C O C C 1/2 C C O O O O 10/13/10 20%1/2 20%O 20%1/2 C 20%20%O 20%1/2 10%O C C C C C C C C C C 20%20%20%1/2 20%20%C 20%O O 20%20%20%20%20%20%C 10%20%C O 20% 10/28/10 1/2 1/2 1/2 O 1/2 1/2 C O 20%O 1/2 O 20%C C C C C C C C C C C 1/2 1/2 20%20%20%1/2 C 20%O O O O O O 1/2 20%C C 1/2 C 1/2 20% 11/4/10 1/2 1/2 1/2 O 1/2 1/2 C O 20%O 1/2 O 20%C C C C C C C C C C C 1/2 1/2 20%20%20%1/2 C 20%O O O O O O 1/2 20%C C 1/2 C 1/2 20% 11/11/10 1/2 1/2 1/2 O 1/2 1/2 C O 20%O 1/2 O 20%C C C C C C C C C C C 1/2 1/2 20%20%20%1/2 C 20%O O O O O O 1/2 20%C C 1/2 C 1/2 20% 11/23/10 1/2 1/2 1/2 O 1/2 1/2 C O 20%O 1/2 O 20%C C C C C C C C C C C 1/2 1/2 20%20%20%1/2 C 20%O O O O O O 1/2 20%C C 1/2 C 1/2 20% 12/1/10 1/2 1/2 1/2 O 1/2 1/2 C O 20%O 1/2 O 20%C C C C C C C C C C C 1/2 1/2 20%20%20%1/2 C 20%O O O O O O 1/2 20%C C 1/2 C 1/2 20% 12/7/10 1/2 1/2 1/2 O 1/2 1/2 C O 20%O 1/2 O 20%C C C C C C C C C C C 1/2 1/2 20%20%20%1/2 C 20%O O O O O O 1/2 20%C C 1/2 C 1/2 20% 12/16/10 1/2 1/2 1/2 O 1/2 1/2 C O 20%O 1/2 O 20%C C C C C C C C C C C 1/2 1/2 20%20%20%1/2 C 20%O O O O O O 1/2 20%C C 1/2 C 1/2 20% 1/4/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 1/14/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 1/27/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 2/2/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 2/21/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 3/4/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 3/11/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 3/26/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 4/6/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 4/12/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/11/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/18/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/1/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/9/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/14/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/21/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/27/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/5/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/12/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/13/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/27/11 O O O O O O O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C 8/11/11 O O O O O O O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C 8/18/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/26/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/31/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 9/7/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 9/15/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 9/22/11 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 9/29/11 C C C C C C O C O C C C O C O C C C C C C C C C C C C C C C O C C C C C C C O C O C O C O C varying well configurations South Lake Tahoe, California varying well configurations TABLE 7 SUMMARY OF VE WELLFIELD DATA 1024 Lake Tahoe Boulevard Lake Tahoe Laundry Works varying well configurations varying well configurations E2C Remediation Table 7-1 Project Number: 1950BK26 December 15, 2017 Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Date HVE-1 HVE-2 HVE-3 HVE-4 HVE-5 HVE-6 VES-1 VED-1 VES-2 VED-2 VES-3 VED-3 VES-4 VED-4 VES-5 VED-5 VES-6 VED-6 VES-7 VED-7 VES-8 VED-8 VES-9 VED-9 VES-10VED-10VES-11VED-11VES-12VED-12 VES-13VED-13VES-14VED-14VES-15VED-15VES-16VED-16VES-17VED-17VES-18VED-18VES-19VED-19 VES-20 VED-20 Monitored valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve South Lake Tahoe, California TABLE 7 SUMMARY OF VE WELLFIELD DATA 1024 Lake Tahoe Boulevard Lake Tahoe Laundry Works 10/5/11 System off on arrival and left off due to high water 10/13/11 C C C C C C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C 10/18/11 C C C C C C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O C 11/30/11 O O O O O O O O O O O O O O O O 50%C C 50%50%50%50%50%O O C O O O O O 50%50%C C C C O O O O O C O C 12/9/11 O O O O O O O O O O O O O O O O 50%C C 50%50%50%50%50%O O C O O O O O 50%50%C C C C O O O O O C O C 12/15/11 O O O O O O O O O O O O O O O O 50%C C 50%50%50%50%50%O O C O O O O O 50%50%C C C C O O O O O C O C 12/21/11 O O O O O O O O O O O O O O O O 50%C C 50%50%50%50%50%O O C O O O O O 50%50%C C C C O O O O O C O C 1/4/12 O O O O O O O O O O O O O O O O 50%C C 50%50%50%50%50%O O C O O O O O 50%50%C C C C O O O O O C O C 1/12/12 O O O O O O O O O O O O O O O O 50%C C 50%50%50%50%50%O O C O O O O O 50%50%C C C C O O O O O C O C 1/17/12 25%25%25%25%10%10%O O O 25%O O 25%O 25%25%50%50%O O 50%50%50%50%O O 50%O O O O O 50%50%25%25%50%50%25%O O 25%O O O 50% 1/25/12 25%25%25%25%10%10%O O O 25%O O 25%O 25%25%50%50%O O 50%50%50%50%O O 50%O O O O O 50%50%25%25%50%50%25%O O 25%O O O 50% 2/3/12 25%25%25%25%10%10%O O O 25%O O 25%O 25%25%50%50%O O 50%50%50%50%O O 50%O O O O O 50%50%25%25%50%50%25%O O 25%O O O 50% 2/9/12 25%25%25%25%10%10%O O O 25%O O 25%O 25%25%50%50%O O 50%50%50%50%O O 50%O O O O O 50%50%25%25%50%50%25%O O 25%O O O 50% 2/17/12 25%25%25%25%10%10%O O O 25%O O 25%O 25%25%50%50%O O 50%50%50%50%O O 50%O O O O O 50%50%25%25%50%50%25%O O 25%O O O 50% 3/8/12 25%25%25%25%10%10%O O O 25%O O 25%O 25%25%50%50%O O 50%50%50%50%O O 50%O O O O O 50%50%25%25%50%50%25%O O 25%O O O 50% 3/29/12 25%25%25%25%10%10%O O O 25%O O 25%O 25%25%50%50%O O 50%50%50%50%O O 50%O O O O O 50%50%25%25%50%50%25%O O 25%O O O 50% 4/18/12 O O O O O O PO C PO C PO C O C PO C PO C O C O C O C O C O C O C PO C O C O C O C PO C PO C O C O C 4/26/12 O O O O O O PO C PO C PO C O C PO C PO C O C O C O C O C O C O C PO C O C O C O C PO C PO C O C O C 5/1/12 O O O O O O PO C PO C PO C O C PO C PO C O C O C O C O C O C O C PO C O C O C O C PO C PO C O C O C 5/8/12 O O O O O O PO C PO C PO C O C PO C C C C C C C C C C C O C O C PO C C C C C C C PO C PO C O C O C 5/14/12 O O O O O O PO C PO C PO C O C PO C C C C C C C C C C C O C O C PO C C C C C C C PO C PO C O C O C 5/23/12 O O O O O O PO C PO C PO C O C PO C C C C C C C C C C C O C O C PO C C C C C C C PO C PO C O C O C 5/30/12 O O O O O O PO C PO C PO C O C C C C C O C O C O C O C O C O C PO C O C O C O C C C PO C O C O C 6/8/12 O O O O O O PO C PO C PO C O C C C C C O C O C O C O C O C O C PO C C C C C C C C C PO C O C O C 6/14/12 O O O O O O PO C PO C PO C O C C C C C O C O C O C O C O C O C PO C C C C C C C C C PO C O C O C 6/21/12 O O O O O O PO C PO C PO C O C C C C C O C O C O C O C O C O C PO C C C C C C C C C PO C O C O C 6/27/12 O O O O C C O C O C C C C C C C C C C C C C C C C C O C O C O C C C C C C C C C C C C C C C 7/20/12 O O O O C C O C O C C C C C C C C C C C C C C C C C O C O C O C C C C C C C C C C C C C C C 7/26/12 O O O O C C O C O C C C C C C C C C C C C C C C C C O C O C O C C C C C C C C C C C C C C C 8/1/12 O O O O C C O PO O PO C C C C C C C C C C PO C C PO C C O PO O PO O PO C C C C C C C C C C C C C C 8/8/12 O O O O C C O 50%O 50%C C C C C C C C C C 50%C C 50%C C O 50%O 50%O 50%C C C C C C C C C C C C C C 8/16/12 O O O O C C O 50%O 50%C C C C C C C C C C 50%C C 50%C C O 50%O 50%O 50%C C C C C C C C C C C C C C 8/21/12 O O O O C C O 50%O 50%C C C C C C C C C C 50%C C 50%C C O 50%O 50%O 50%C C C C C C C C C C C C C C 8/28/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 9/7/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 9/13/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 9/18/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 9/28/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 10/3/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 10/12/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 10/17/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 10/23/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 10/31/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 11/6/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 11/19/12 O O O O C C O 50%O 50%C C C C C C C C C C C C C C C C O 50%O 50%O 50%C C C C C C C C C C C C C C 11/30/12 11/5/13 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 11/15/13 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 11/22/13 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 11/26/13 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 12/4/13 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 12/10/13 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 12/19/13 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 12/27/13 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 1/3/14 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 1/7/14 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 1/14/14 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 1/20/14 O O O O C C O O O O O O O O C C C C C C C O C O O O O O O O O O C C C C C C C C C C C C C C 1/28/14 O O O C C C O O O O O O O O C C C C C C C C C C C C O O O O O O C C C C C C C C C C C C O C 1/31/14 O O O C C C O O O O O O O O C C C C C C C C C C C C O O O O O O C C C C C C C C C C C C O C 2/4/14 O O O C C C O O O O O O O O C C C C C C C C C C O O O O O O O O C C C C C C C C C C C C O O System off to start ozone sparging through AS wells E2C Remediation Table 7-2 Project Number: 1950BK26 December 15, 2017 Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Date HVE-1 HVE-2 HVE-3 HVE-4 HVE-5 HVE-6 VES-1 VED-1 VES-2 VED-2 VES-3 VED-3 VES-4 VED-4 VES-5 VED-5 VES-6 VED-6 VES-7 VED-7 VES-8 VED-8 VES-9 VED-9 VES-10VED-10VES-11VED-11VES-12VED-12 VES-13VED-13VES-14VED-14VES-15VED-15VES-16VED-16VES-17VED-17VES-18VED-18VES-19VED-19 VES-20 VED-20 Monitored valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve South Lake Tahoe, California TABLE 7 SUMMARY OF VE WELLFIELD DATA 1024 Lake Tahoe Boulevard Lake Tahoe Laundry Works 2/14/14 O O O C C C O O O O O O O O C C C C C C C C C C O O O O O O O O C C C C C C C C C C C C O O 2/18/14 O O O C C C O O O O O O O O C C C C C C C C C C O O O O O O O O C C C C C C C C C C C C O O 2/26/14 O O O C C C O O O O O O O O C C C C C C C C C C O O O O O O O O C C C C C C C C C C C C O O 2/28/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 3/6/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 3/20/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 3/24/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 4/4/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 4/10/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 4/25/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 5/1/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 5/6/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 5/9/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 5/22/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 5/30/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 6/6/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 6/13/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 6/26/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 8/13/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 8/20/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 8/25/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 9/3/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 9/8/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 9/17/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 9/22/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 10/10/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 10/17/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 10/24/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 11/3/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 11/7/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 11/14/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 11/20/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 11/26/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 12/3/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 12/9/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 12/16/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 12/29/14 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 1/8/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 1/16/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 1/22/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 1/30/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 2/3/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 2/9/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 2/17/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 2/24/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 3/2/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 3/10/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 3/17/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 3/27/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 3/31/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 4/8/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 4/17/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 4/23/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 4/29/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 5/4/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 5/11/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 5/19/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 5/27/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 6/4/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 6/9/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 6/15/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C E2C Remediation Table 7-3 Project Number: 1950BK26 December 15, 2017 Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Date HVE-1 HVE-2 HVE-3 HVE-4 HVE-5 HVE-6 VES-1 VED-1 VES-2 VED-2 VES-3 VED-3 VES-4 VED-4 VES-5 VED-5 VES-6 VED-6 VES-7 VED-7 VES-8 VED-8 VES-9 VED-9 VES-10VED-10VES-11VED-11VES-12VED-12 VES-13VED-13VES-14VED-14VES-15VED-15VES-16VED-16VES-17VED-17VES-18VED-18VES-19VED-19 VES-20 VED-20 Monitored valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve South Lake Tahoe, California TABLE 7 SUMMARY OF VE WELLFIELD DATA 1024 Lake Tahoe Boulevard Lake Tahoe Laundry Works 6/22/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 6/29/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 7/6/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 7/13/15 O O O O O O O O O O O O O O O O C C C C C C C C O O O O O O O O C C C C C C C C C C C C C C 7/21/15 10/12/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 10/23/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 11/4/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 11/12/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 11/20/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 11/23/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 11/30/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 12/8/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 12/18/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 12/23/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 12/30/15 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 1/4/16 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 1/11/16 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 1/12/16 O O C O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 1/21/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 1/26/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 2/1/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 2/11/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 2/15/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 2/22/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 3/1/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 3/10/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 3/14/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 3/25/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 3/30/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 4/8/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 4/13/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 4/19/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 4/26/16 O O O O O O O O O O O O O O C C C C C C C C C C C C C C C C C C C C C C C C C C O O O O O O 5/2/16 O O O O O O O O O O O O C C C C C C C C C C C C C C O O O O O O C C C C C C O O O O O O C C 5/9/16 O O O O O O O O O O O O C C C C C C C C C C C C C C O O O O O O C C C C C C O O O O O O C C 5/20/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/25/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/3/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/8/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/17/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/21/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/30/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/8/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/15/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/21/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/27/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/1/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/12/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/19/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 9/15/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 9/28/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 10/10/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 10/19/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 10/27/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 10/31/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 11/9/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 11/18/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 11/21/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 12/1/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 12/16/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O System off due to power failure. E2C Remediation Table 7-4 Project Number: 1950BK26 December 15, 2017 Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Well Date HVE-1 HVE-2 HVE-3 HVE-4 HVE-5 HVE-6 VES-1 VED-1 VES-2 VED-2 VES-3 VED-3 VES-4 VED-4 VES-5 VED-5 VES-6 VED-6 VES-7 VED-7 VES-8 VED-8 VES-9 VED-9 VES-10VED-10VES-11VED-11VES-12VED-12 VES-13VED-13VES-14VED-14VES-15VED-15VES-16VED-16VES-17VED-17VES-18VED-18VES-19VED-19 VES-20 VED-20 Monitored valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve valve South Lake Tahoe, California TABLE 7 SUMMARY OF VE WELLFIELD DATA 1024 Lake Tahoe Boulevard Lake Tahoe Laundry Works 12/20/16 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 1/6/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 1/13/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 1/17/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 1/27/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 1/31/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 2/9/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 2/14/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 2/27/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 3/7/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 3/15/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 3/20/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 3/29/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 3/30/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 4/3/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 4/14/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 4/19/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 4/25/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/4/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/10/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/17/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/25/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 5/30/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/12/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 6/22/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/7/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/12/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/19/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 7/28/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/2/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/11/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/18/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/25/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 8/29/17 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O Notes: 8/13/14 - Restart with emissions direct to atmosphere per EDCQMD letter, dated 7/30/14 20% = 2O percent open 1/2 = One-half open 1/4 = 1/4 open C = Closed O = Fully open PO = Partially Open 11/5/13: System restarted per CRWQCB directive, dated 11/1/13 E2C Remediation Table 7-5 Project Number: 1950BK26 December 15, 2017 PCE TCE cis-1,2-DCE Trans-1,2-DCE Other VOCs 4/8/10 0.680 0.031 0.041 nd<0.01 nd<0.01 4/9/10 - Test 9 0.268 0.02 0.027 nd<0.01 nd<0.01 4/9/10 1.950 0.045 0.048 nd<0.01 nd<0.01 6/24/10 0.204 nd<0.01 nd<0.01 nd<0.01 nd<0.01 7/15/10 6.61 0.281 nd<2.00 nd<2.00 nd<2.00 8/11/10 2.04 0.031 nd<0.025 nd<0.025 nd<0.025 8/18/10 9.14 0.096 0.047 nd<0.041 nd<0.041 8/25/10 11.4 1.83 4.32 nd<0.041 nd<0.041 9/15/10 16.4 0.154 0.046 nd<0.041 0.266 10/6/10 11.8 0.104 0.033 nd<0.041 0.112 11/11/10 2.7 nd<0.01 nd<0.01 nd<0.01 nd<0.01 12/16/10 2.18 0.39 nd<0.01 nd<0.01 nd<0.01 1/21/11 11.30 0.228 0.028 nd<0.025 0.241 5/18/11 0.795 nd<0.01 nd<0.01 nd<0.01 0.049 6/14/11 4.23 nd<0.027 nd<0.027 nd<0.027 1.181 7/18/11 0.332 nd<0.01 nd<0.01 nd<0.01 0.419 8/31/11 0.028 nd<0.01 nd<0.01 nd<0.01 0.015 10/13/11 2.95 0.187 nd<0.01 nd<0.01 0.0197 12/9/11 1.61 0.024 nd<0.01 nd<0.01 29.6 1/4/12 0.997 nd<0.01 nd<0.01 nd<0.01 nd<0.01 2/9/12 1.24 0.0124 nd<0.01 nd<0.01 nd<0.01 5/14/12 1.24 nd<0.01 nd<0.01 nd<0.01 0.056 6/27/12 2.66 nd<0.01 nd<0.01 nd<0.01 0.03 7/26/12 1.31 0.013 nd<0.01 nd<0.01 nd<0.01 8/21/12 0.441 nd<0.01 nd<0.01 nd<0.01 nd<0.01 9/13/12 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 10/31/12 0.145 nd<0.01 nd<0.01 nd<0.01 0.233 11/30/12 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 11/22/13 0.39 nd<0.010 nd<0.010 nd<0.010 1.7 12/10/13 0.49 nd<0.010 nd<0.010 nd<0.010 0.09 1/7/14 0.27 nd<0.010 nd<0.010 nd<0.010 nd<0.010 2/28/14 nd<0.010 nd<0.010 nd<0.010 nd<0.010 0.025 3/20/14 nd<0.010 nd<0.010 nd<0.010 nd<0.010 0.048 4/10/14 0.022 nd<0.010 nd<0.010 nd<0.010 0.011 5/9/14 0.54 nd<0.010 nd<0.010 nd<0.010 nd<0.010 6/26/14 1.0 0.013 nd<0.010 nd<0.010 0.014 8/4/14 3.5 0.095 0.028 nd<0.010 0.17 8/13/14 0.94 0.011 nd<0.010 nd<0.010 nd<0.010 11/26/14 0.11 nd<0.010 nd<0.010 nd<0.010 nd<0.010 12/3/14 0.32 nd<0.010 nd<0.010 nd<0.010 nd<0.010 1/22/15 0.12 nd<0.010 nd<0.010 nd<0.010 nd<0.010 3/27/15 0.079 nd<0.010 nd<0.010 nd<0.010 nd<0.010 4/17/15 0.087 nd<0.010 nd<0.010 nd<0.010 nd<0.010 5/27/15 0.092 nd<0.010 nd<0.010 nd<0.010 nd<0.010 6/22/15 0.02 nd<0.010 nd<0.010 nd<0.010 nd<0.010 10/12/15 2.4 0.089 0.098 nd<0.011 1.252 11/23/15 0.02 nd<0.010 nd<0.010 nd<0.010 nd<0.010 12/23/15 nd<0.010 nd<0.010 nd<0.010 nd<0.010 nd<0.010 1/26/16 2.2 0.013 nd<0.010 nd<0.010 nd<0.011 South Lake Tahoe, California Sample Point Sample Date TABLE 8 SUMMARY OF HISTORICAL INTERIM REMEDIAL SYSTEM VAPOR LABORATORY ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard ppmV Influent E2C Remediation Table 8-1 Project Number: 1950BK26 December 15, 2017 PCE TCE cis-1,2-DCE Trans-1,2-DCE Other VOCs South Lake Tahoe, California Sample Point Sample Date TABLE 8 SUMMARY OF HISTORICAL INTERIM REMEDIAL SYSTEM VAPOR LABORATORY ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard ppmV 2/22/16 0.24 nd<0.010 nd<0.010 nd<0.010 nd<0.010 3/30/16 1.1 0.015 nd<0.010 nd<0.010 nd<0.010 4/26/16 0.35 nd<0.010 nd<0.010 nd<0.010 nd<0.010 5/25/16 0.18 nd<0.010 nd<0.010 nd<0.010 nd<0.010 6/21/16 0.57 nd<0.010 nd<0.010 nd<0.010 nd<0.010 7/29/16 0.35 nd<0.010 nd<0.010 nd<0.010 0.04 9/15/16 0.51 nd<0.010 nd<0.010 nd<0.010 nd<0.010 10/31/16 0.075 nd<0.010 nd<0.010 nd<0.010 nd<0.010 12/1/16 0.053 nd<0.010 nd<0.010 nd<0.010 nd<0.010 1/6/17 0.072 nd<0.010 nd<0.010 nd<0.010 nd<0.010 3/15/17 0.076 nd<0.010 nd<0.010 nd<0.010 nd<0.010 4/25/17 nd<0.01 nd<0.010 nd<0.010 nd<0.010 nd<0.010 5/25/17 nd<0.01 nd<0.010 nd<0.010 nd<0.010 nd<0.010 7/28/17 0.015 nd<0.010 nd<0.010 nd<0.010 nd<0.010 Operational Average 1.979 0.175 0.472 0.000 1.694 4/9/10 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 6/24/10 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 7/15/10 nd<2.00 nd<2.00 nd<2.00 nd<2.00 nd<2.00 8/18/10 2.23 0.027 0.19 nd<0.02 0.29 8/25/10 3.98 0.272 0.161 nd<0.02 0.276 9/15/10 3.29 0.133 0.097 nd<0.02 0.139 10/6/10 1.5 0.034 nd<2.00 nd<2.00 0.032 11/11/10 2.52 nd<2.00 nd<2.00 nd<2.00 0.024 1/21/11 1.35 nd<0.025 nd<0.025 nd<0.025 nd<0.025 5/18/11 1.00 nd<0.01 nd<0.01 nd<0.01 0.026 6/14/11 2.00 0.109 0.128 nd<0.029 0.626 7/18/11 nd<0.01 nd<0.01 nd<0.01 nd<0.01 0.195 8/31/11 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 10/13/11 0.142 nd<0.01 nd<0.01 nd<0.01 nd<0.01 12/9/11 1.61 0.024 nd<0.01 nd<0.01 nd<0.01 1/4/12 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 8/21/12 0.297 nd<0.01 nd<0.01 nd<0.01 nd<0.01 Operational Average 1.811 0.100 0.144 0.000 0.201 Mid-Fluent Influent E2C Remediation Table 8-2 Project Number: 1950BK26 December 15, 2017 PCE TCE cis-1,2-DCE Trans-1,2-DCE Other VOCs South Lake Tahoe, California Sample Point Sample Date TABLE 8 SUMMARY OF HISTORICAL INTERIM REMEDIAL SYSTEM VAPOR LABORATORY ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard ppmV 4/9/10 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 6/24/10 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 7/15/10 nd<2.00 nd<2.00 nd<2.00 nd<2.00 nd<2.00 8/11/10 nd<0.023 nd<0.023 nd<0.023 nd<0.023 nd<0.023 8/18/10 nd<0.01 nd<0.01 0.192 nd<0.01 nd<0.01 8/25/10 nd<0.01 nd<0.01 0.175 nd<0.01 nd<0.01 9/15/10 nd<0.01 nd<0.01 0.221 nd<0.01 nd<0.01 10/6/10 0.206 nd<0.01 0.024 nd<0.01 nd<0.01 11/11/10 2.93 0.263 nd<2.00 nd<0.01 0.286 12/16/10 0.948 0.067 nd<2.00 nd<0.01 nd<0.01 1/21/11 3.68 0.233 0.081 nd<0.027 0.249 5/18/11 0.106 nd<0.01 nd<0.01 nd<0.01 0.152 6/14/11 nd<0.029 nd<0.029 nd<0.029 nd<0.029 nd<0.029 7/18/11 0.187 nd<0.01 nd<0.01 nd<0.01 0.176 8/31/11 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 10/13/11 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 12/9/11 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 1/4/12 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 2/9/12 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 5/14/12 0.633 nd<0.01 nd<0.01 nd<0.01 nd<0.01 6/27/12 0.04 nd<0.01 nd<0.01 nd<0.01 nd<0.01 7/26/12 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 8/21/12 0.287 nd<0.01 nd<0.01 nd<0.01 nd<0.01 9/13/12 0.346 nd<0.01 nd<0.01 nd<0.01 nd<0.01 10/31/12 0.117 nd<0.01 nd<0.01 nd<0.01 nd<0.01 11/30/12 nd<0.01 nd<0.01 nd<0.01 nd<0.01 nd<0.01 11/22/13 nd<0.010 nd<0.010 nd<0.010 nd<0.010 nd<0.010 12/10/13 0.13 nd<0.010 nd<0.010 nd<0.010 nd<0.010 1/7/14 nd<0.010 nd<0.010 nd<0.010 nd<0.010 nd<0.010 2/28/14 nd<0.010 nd<0.010 nd<0.010 nd<0.010 0.128 3/20/14 nd<0.010 nd<0.010 nd<0.010 nd<0.010 1.5 4/10/14 nd<0.010 nd<0.010 nd<0.010 nd<0.010 0.024 5/9/14 nd<0.010 nd<0.010 nd<0.010 nd<0.010 0.019 6/26/14 0.019 nd<0.010 nd<0.010 nd<0.010 nd<0.010 Operational Average 0.801 0.188 0.139 0.00 0.359 Effluent E2C Remediation Table 8-3 Project Number: 1950BK26 December 15, 2017 PCE TCE cis-1,2-DCE Trans-1,2-DCE Other VOCs South Lake Tahoe, California Sample Point Sample Date TABLE 8 SUMMARY OF HISTORICAL INTERIM REMEDIAL SYSTEM VAPOR LABORATORY ANALYTICAL DATA Lake Tahoe Laundry Works 1024 Lake Tahoe Boulevard ppmV Notes: cis-1,2-DCE = cis-1,2-Dichloroethene na = Not applicable nd< = Not detected at or above the detection limit, which is indicated by value PCE = Tetrachloroethene (a.k.a. perchloroethene) ppmV = parts per million by volume TCE = Trichloroethene Trans-1,2-DCE = Trans-1,2-dichloroethene 1/27/11 - Vapor samples collected; however, during lab analyses instrument malfunctioned; no results 2/21/11 - Vapor samples collected; however, during lab analyses instrument malfunctioned; no results 10/26/11-11/30/11 - carbon changeout E2C Remediation Table 8-4 Project Number 1950BK26 December 15, 2017 E2C Remediation Graphs GRAPHS Graph 1 Lake Tahoe Laundry Works Hydrograph - 12/4/09 - Current Graph 2 LW-MW-1S PCE Concentration Trends Graph 3 LW-MW-2S PCE Concentration Trends Graph 4 LW-MW-5S PCE Concentration Trends Graph 5 LW-MW-9S PCE Concentration Trends Graph 6 LW-MW-10S/10 SR PCE Concentration Trends Graph 7 LW-MW-11S PCE Concentration Trends Graph 8 LW-MW-12S PCE Concentration Trends Graph 9 LW-MW-13S PCE Concentration Trends Graph 10 OS-1 PCE Concentration Trends Project Number: 1950BK26 December 15, 2017 E 2C Remediation Graph-1 6,172.00 6,174.00 6,176.00 6,178.00 6,180.00 6,182.00 6,184.00 6,186.00 6,188.00 GW Elevation (feet MSL)Date Monitored GRAPH 1 LAKE TAHOE LAUNDRY WORKS HYDROGRAPH -12/4/09 -Current LW-MW-1S LW-MW-2S LW-MW-5S LW-MW-9S LW-MW-11S LW-MW-12S LW-MW-13S PILOT TEST PERIOD Interim RemedialAction Period Remedial Action Period Project Number 1950BK26 December 15, 2017 E 2C Remediation Graph 2 0 1,000 2,000 3,000 4,000 5,000 6,000 PCE Concentration (µg/L)Monitoring Date Graph 2 LW-MW-1S PCE CONCENTRATION TRENDS LW-MW-1S Linear (LW-MW-1S) Project Number 1950BK26 December 15, 2017 E 2C Remediation Graph 3 0 50 100 150 200 250 300 350 400 PCE Concentration (µg/L)Monitoring Date Graph 3 LW-MW-2S PCE CONCENTRATION TRENDS LW-MW-2S Linear (LW-MW-2S) Project Number 1950BK26 December 15, 2017 E 2C Remediation Graph 4 0 200 400 600 800 1000 1200 1400 1600 PCE Concentration (µg/L)Monitoring Date Graph 4 LW-MW-5S PCE CONCENTRATION TRENDS LW-MW-5S Linear (LW-MW-5S) Project Number 1950BK26 December 15, 2017 E 2C Remediation Graph 5 0 50 100 150 200 250 300 350 PCE Concentration (µg/L)Monitoring Date Graph 5 LW-MW-9S PCE CONCENTRATION TRENDS LW-MW-9S Linear (LW-MW-9S) Project Number 1950BK26 December 15, 2017 E 2C Remediation Graph 6 0 10 20 30 40 50 60 70 PCE Concentration (µg/L)Monitoring Date Graph 6 LW-MW-10S/10SR PCE CONCENTRATION TRENDS LW-MW-10S/10SR Linear (LW-MW-10S/10SR) Project Number 1950BK26 December 15, 2017 E 2C Remediation Graph 7 0 5 10 15 20 25 30 35 40 45 50 PCE Concentration (µg/L)Monitoring Date Graph 7 LW-MW-11S PCE CONCENTRATION TRENDS LW-MW-11S Linear (LW-MW-11S) Project Number 1950BK26 December 15, 2017 E 2C Remediation Graph 8 0 100 200 300 400 500 600 700 800 900 PCE Concentration (µg/L)Monitoring Date Graph 8 LW-MW-12S PCE CONCENTRATION TRENDS LW-MW-12S Linear (LW-MW-12S) Project Number 1950BK26 December 15, 2017 E 2C Remediation Graph 9 0 10 20 30 40 50 60 70 PCE Concentration (µg/L)Monitoring Date Graph 9 LW-MW-13S PCE CONCENTRATION TRENDS LW-MW-13S Linear (LW-MW-13S) Project Number 1950BK26 December 15, 2017 E 2C Remediation Graph 5 0 10 20 30 40 50 60 70 80 90 100 PCE Concentration (µg/L)Monitoring Date Graph 10 OS-1 PCE CONCENTRATION TRENDS OS-1 Linear (OS-1) Project Number 1950BK26 December 15, 2017 E2C Remediation Appendices APPENDICES Appendix A Groundwater Monitoring Field Data Sheets Appendix B Laboratory Groundwater Analytical Report Appendix C GeoTracker Upload Confirmation Reports Appendix D Shallow Soil Vapor Sampling Field Data Sheets Appendix E Soil-Gas Monitoring Procedures (From IRAWP) Appendix F Laboratory VP Well Vapor Analytical Reports Appendix G SVE/GASS Influent and Effluent Vapor Analytical Laboratory Reports Appendix H SVE/GASS Field Data Sheets Appendix I Batch Pumping Summary Tables Appendix J Batch Pumping Field Data Sheets Appendix K Batch Pumping Laboratory Groundwater Analytical Reports Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix A APPENDIX A Groundwater Monitoring Field Data Sheets Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix B APPENDIX B Laboratory Groundwater Analytical Report Client Sample ID:TRIP BLANK Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-01 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:TRIP BLANK Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-01 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 98%70.0%130% 1,2-Dichloroethane-d4 103%70.0%130% Toluene-d8 98%70.0%130% 4-Bromofluorobenzene 106%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:OS-1 Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-02 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 1.4 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:OS-1 Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-02 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 95%70.0%130% 1,2-Dichloroethane-d4 101%70.0%130% Toluene-d8 101%70.0%130% 4-Bromofluorobenzene 107%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-03 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-03 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 97%70.0%130% 1,2-Dichloroethane-d4 103%70.0%130% Toluene-d8 103%70.0%130% 4-Bromofluorobenzene 108%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-13S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-04 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-13S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-04 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 93%70.0%130% 1,2-Dichloroethane-d4 101%70.0%130% Toluene-d8 98%70.0%130% 4-Bromofluorobenzene 107%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-12S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-05 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 0.96 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-12S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-05 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 98%70.0%130% 1,2-Dichloroethane-d4 107%70.0%130% Toluene-d8 98%70.0%130% 4-Bromofluorobenzene 105%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-06 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-06 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 98%70.0%130% 1,2-Dichloroethane-d4 104%70.0%130% Toluene-d8 101%70.0%130% 4-Bromofluorobenzene 107%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-10SR Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-07 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform 1.6 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-10SR Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-07 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 97%70.0%130% 1,2-Dichloroethane-d4 102%70.0%130% Toluene-d8 97%70.0%130% 4-Bromofluorobenzene 112%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-08 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 34 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-08 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 93%70.0%130% 1,2-Dichloroethane-d4 100%70.0%130% Toluene-d8 100%70.0%130% 4-Bromofluorobenzene 108%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-14S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-09 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 31 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-14S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-09 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 96%70.0%130% 1,2-Dichloroethane-d4 102%70.0%130% Toluene-d8 99%70.0%130% 4-Bromofluorobenzene 106%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2D Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-10 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 5.6 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2D Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled:09/27/17 Lab ID:17092801-10 Instrument:GCMS#1 Date Analyzed:09/28/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 100%70.0%130% 1,2-Dichloroethane-d4 105%70.0%130% Toluene-d8 96%70.0%130% 4-Bromofluorobenzene 109%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID: LW-MW-5D Client: E2C Remediation Matrix:Aqueous Project: Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled: 09/27/17 Lab ID: 17092801-11 Instrument: GCMS#1 Date Analyzed: 09/28/17 Operator: Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE) ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME) ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 1.1 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID: LW-MW-5D Client: E2C Remediation Matrix:Aqueous Project: Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled: 09/27/17 Lab ID: 17092801-11 Instrument: GCMS#1 Date Analyzed: 09/28/17 Operator: Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 95%70.0%130% 1,2-Dichloroethane-d4 103%70.0%130% Toluene-d8 99%70.0%130% 4-Bromofluorobenzene 105%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID: LW-MW-5S Client: E2C Remediation Matrix:Aqueous Project: Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled: 09/27/17 Lab ID: 17092801-12 Instrument: GCMS#1 Date Analyzed: 09/28/17 Operator: Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE) ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME) ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 2.9 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID: LW-MW-5S Client: E2C Remediation Matrix:Aqueous Project: Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled: 09/27/17 Lab ID: 17092801-12 Instrument: GCMS#1 Date Analyzed: 09/28/17 Operator: Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 99%70.0%130% 1,2-Dichloroethane-d4 103%70.0%130% Toluene-d8 98%70.0%130% 4-Bromofluorobenzene 106%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID: LW-MW-1D Client: E2C Remediation Matrix:Aqueous Project: Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled: 09/27/17 Lab ID: 17092801-13 Instrument: GCMS#1 Date Analyzed: 09/28/17 Operator: Doug Selby 10/03/17 Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE) ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME) ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene 4.7 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 210 1.0 2 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID: LW-MW-1D Client: E2C Remediation Matrix:Aqueous Project: Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled: 09/27/17 Lab ID: 17092801-13 Instrument: GCMS#1 Date Analyzed: 09/28/17 Operator: Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene 2.2 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 94%70.0%130% 1,2-Dichloroethane-d4 99%70.0%130% Toluene-d8 102%70.0%130% 4-Bromofluorobenzene 107%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID: LW-MW-1S Client: E2C Remediation Matrix:Aqueous Project: Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled: 09/27/17 Lab ID: 17092801-14 Instrument: GCMS#1 Date Analyzed: 09/28/17 Operator: Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE) ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME) ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene 0.51 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 43 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID: LW-MW-1S Client: E2C Remediation Matrix:Aqueous Project: Lake Tahoe-Laundry Works 3Q17 GWM Date Sampled: 09/27/17 Lab ID: 17092801-14 Instrument: GCMS#1 Date Analyzed: 09/28/17 Operator: Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Napthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene 0.67 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 100%70.0%130% 1,2-Dichloroethane-d4 109%70.0%130% Toluene-d8 101%70.0%130% 4-Bromofluorobenzene 106%70.0%130% Report Date: 10/4/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 EPA 8260B QA-QC Report ELAP Certification # 2606 E2C Remediation 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Projects Covered by this QA-QC:Lake Tahoe Laundry Works 3Q17 GWM 9-27-2017 Analysis Date:9/28/2017 Matrix: AQ BFB: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-50.5 101% 1,2-Dichloroethane-d4 50.2 100% Toluene-d8 50.2 100% p-Bromofluorobenzene (BFB)41.9 84% Method Blank: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-46.8 94% 1,2-Dichloroethane-d4 50.8 102% Toluene-d8 48.7 97% p-Bromofluorobenzene (BFB)54.6 109% Laboratory Control Sample:Results % Recovery 1,1-Dichloroethene 28.4 114% Trichloroethene 29.2 117% Chlorobenzene 27.9 112% Toluene 28.2 113% Benzene 27.3 109% p-Bromofluorobenzene (BFB)52.9 106% LCS Duplicate:Results % Recovery 1,1-Dichloroethene 24.3 97% Trichloroethene 25.6 103% Chlorobenzene 24.5 98% Toluene 24.5 98% Benzene 23.8 95% p-Bromofluorobenzene (BFB)55.2 110% CLIENT: 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix C APPENDIX C GeoTracker Upload Confirmation Reports UPLOADING A GEO_WELL FILE SUCCESS Processing is complete. No errors were found! Your file has been successfully submitted! Submittal Type: GEO_WELL Report Title: GEO_WELL (5-2-17) Facility Global ID: SL0601754315 Facility Name: LAKE TAHOE LAUNDRY WORKS File Name: GEO_WELL.zip Organization Name: E2C Remediation, LLC Username: E2C REMEDIATION, LLC IP Address: 66.60.184.162 Submittal Date/Time: 6/14/2017 11:47:06 AM Confirmation Number: 1095163702 UPLOADING A GEO_REPORT FILE SUCCESS Your GEO_REPORT file has been successfully submitted! Submittal Type: GEO_REPORT Report Title: Revised Groundwater Investigation Work Plan Report Type: Other Workplan Report Date: 9/11/2017 Facility Global ID: SL0601754315 Facility Name: LAKE TAHOE LAUNDRY WORKS File Name: LTLW Working Parties Revised Off-Site Groundwater Investigation Work Plan - 9-11-2017.pdf Organization Name: E2C Remediation, LLC Username: E2C REMEDIATION, LLC IP Address: 66.60.184.162 Submittal Date/Time: 9/13/2017 9:30:01 AM Confirmation Number: 7569632172 UPLOADING A GEO_REPORT FILE SUCCESS Your GEO_REPORT file has been successfully submitted! Submittal Type: GEO_REPORT Report Title: Off-Site Groundwater Investigation Data Report Report Type: Monitoring Report - Other Report Date: 8/30/2017 Facility Global ID: SL0601754315 Facility Name: LAKE TAHOE LAUNDRY WORKS File Name: LTLW Off-Site Groundwater Investigation Report - 30 Aug 2017.pdf Organization Name: E2C Remediation, LLC Username: E2C REMEDIATION, LLC IP Address: 66.60.184.162 Submittal Date/Time: 9/1/2017 9:18:40 AM Confirmation Number: 5409415900 UPLOADING A GEO_REPORT FILE SUCCESS Your GEO_REPORT file has been successfully submitted! Submittal Type: GEO_REPORT Report Title: 2Q 2017 Groundwater Monitoring Report and Current Site Remediation Status Report Report Type: Monitoring Report - Quarterly Report Date: 6/2/2017 Facility Global ID: SL0601754315 Facility Name: LAKE TAHOE LAUNDRY WORKS File Name: LTLW 2Q17 QMR_RSR 6.2.17.pdf Organization Name: E2C Remediation, LLC Username: E2C REMEDIATION, LLC IP Address: 66.60.184.162 Submittal Date/Time: 6/14/2017 11:28:44 AM Confirmation Number: 4888801276 UPLOADING A EDF FILE SUCCESS Processing is complete. No errors were found! Your file has been successfully submitted! Submittal Type: EDF Report Title: 2Q 2017 Groundwater Monitoring Report and Current Site Remediation Status Report (Part 2) Report Type: Monitoring Report - Quarterly Facility Global ID: SL0601754315 Facility Name: LAKE TAHOE LAUNDRY WORKS File Name: EDFCL.zip Organization Name: E2C Remediation, LLC Username: E2C REMEDIATION, LLC IP Address: 66.60.184.162 Submittal Date/Time: 6/14/2017 3:31:05 PM Confirmation Number: 1900932013 VIEW QC REPORT VIEW DETECTIONS REPORT UPLOADING A EDF FILE SUCCESS Processing is complete. No errors were found! Your file has been successfully submitted! Submittal Type: EDF Report Title: 2Q 2017 Groundwater Monitoring Report and Current Site Remediation Status Report (Part 4) Report Type: Monitoring Report - Quarterly Facility Global ID: SL0601754315 Facility Name: LAKE TAHOE LAUNDRY WORKS File Name: EDFCL.zip Organization Name: E2C Remediation, LLC Username: E2C REMEDIATION, LLC IP Address: 66.60.184.162 Submittal Date/Time: 6/14/2017 4:15:31 PM Confirmation Number: 6199434280 VIEW QC REPORT VIEW DETECTIONS REPORT UPLOADING A EDF FILE SUCCESS Processing is complete. No errors were found! Your file has been successfully submitted! Submittal Type: EDF Report Title: 2Q 2017 Groundwater Monitoring Report and Current Site Remediation Status Report (Part 3) Report Type: Monitoring Report - Quarterly Facility Global ID: SL0601754315 Facility Name: LAKE TAHOE LAUNDRY WORKS File Name: EDFCL.zip Organization Name: E2C Remediation, LLC Username: E2C REMEDIATION, LLC IP Address: 66.60.184.162 Submittal Date/Time: 6/14/2017 3:56:23 PM Confirmation Number: 4865455329 VIEW QC REPORT VIEW DETECTIONS REPORT UPLOADING A EDF FILE SUCCESS Processing is complete. No errors were found! Your file has been successfully submitted! Submittal Type: EDF Report Title: 2Q 2017 Groundwater Monitoring Report and Current Site Remediation Status Report (Part 1) Report Type: Monitoring Report - Quarterly Facility Global ID: SL0601754315 Facility Name: LAKE TAHOE LAUNDRY WORKS File Name: EDFCL.zip Organization Name: E2C Remediation, LLC Username: E2C REMEDIATION, LLC IP Address: 66.60.184.162 Submittal Date/Time: 6/14/2017 2:39:33 PM Confirmation Number: 8802160859 VIEW QC REPORT VIEW DETECTIONS REPORT UPLOADING A GEO_REPORT FILE SUCCESS Your GEO_REPORT file has been successfully submitted! Submittal Type: GEO_REPORT Report Title: Groundwater Investigation Work Plan Report Type: Other Workplan Report Date: 7/26/2017 Facility Global ID: SL0601754315 Facility Name: LAKE TAHOE LAUNDRY WORKS File Name: LTLW Working Parties GW Investigation Work Plan - 26 July 2017.pdf Organization Name: E2C Remediation, LLC Username: E2C REMEDIATION, LLC IP Address: 66.60.184.162 Submittal Date/Time: 7/26/2017 3:02:57 PM Confirmation Number: 8168847858 Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix D APPENDIX D Shallow Soil Vapor Sampling Field Data Sheets Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix E APPENDIX E Soil-Gas Monitoring Procedures (From IRAWP) Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix F APPENDIX F Laboratory VP Well Vapor Analytical Reports E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-01 Sample ID:VP-1 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 VP Well Vapor Samples PHIL GOALWIN Chloromethane Vinyl Chloride 1,3 Butadiene Bromomethane Freon 113 Chloroethane Chloroform 1,1 Dichloroethene Acetone Carbon Disulfide Lake Tahoe-Laundry Works 10/16/2017 Analysis Type:EPA Method TO-15 9/27/2017 Propylene Methylene Chloride MTBE trans-1,2 Dicloroethene TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Dichlorodifluoromethane (Freon 12) 1,2-Dichlorotetrafluoroethane(F-114) 1,1,1-Tricloroethane Trichlorofluoromethane (F 11) Isopropyl alcohol cis-1,2 Dichloroethene n-Hexane Vinyl acetate 1,1-Dichloroethane Methyl Ethyl Ketone Tetrahydrofuran Notes TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Cyclohexane Carbon Tetrachloride Ethyl Acetate Benzene 1,2-Dichloroethane 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-01 Sample ID:VP-1 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/6/2017 ND 0.10 ppbV 10/14/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 31 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 20 ppbV 10/6/2017 Senior Organic Chemist: Doug Selby Lake Tahoe-Laundry Works TO-15 Notes TO-15 TO-15 10/16/2017 VP Well Vapor Samples 9/27/2017 Analysis Type:EPA Method TO-15PHIL GOALWIN Bromodichloromethane cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene 1,1,2-Trichloroethane TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Chlorobenzene Ethylbenzene m,p-Xylene o-Xylene Styrene Bromoform Trichloroethylene n-Heptane 1,2-Dichloropropane 1,4 Dioxane MBK Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Benzyl chloride 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Naphthalene 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-02 Sample ID:VP-2 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 36 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 20 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 650 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 TO-15 Notes 9/27/2017 Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN Propylene Dichlorodifluoromethane (Freon 12) 1,2-Dichlorotetrafluoroethane(F-114) TO-15 TO-15 TO-15 Chloromethane Vinyl Chloride 1,3 Butadiene Bromomethane Chloroethane Trichlorofluoromethane (F 11) Vinyl acetate 1,1-Dichloroethane Methyl Ethyl Ketone cis-1,2 Dichloroethene Tetrahydrofuran Chloroform 1,1,1-Tricloroethane Cyclohexane Carbon Tetrachloride Isopropyl alcohol Freon 113 1,1 Dichloroethene Acetone Carbon Disulfide Methylene Chloride MTBE trans-1,2 Dicloroethene n-Hexane Ethyl Acetate Benzene 1,2-Dichloroethane TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-02 Sample ID:VP-2 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/6/2017 2700 1000 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 1200000 20000 ppbV 10/13/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 10 ppbV 10/6/2017 ND 20 ppbV 10/6/2017 Senior Organic Chemist: Doug Selby Notes 9/27/2017 n-Heptane Trichloroethylene 1,2-Dichloropropane 1,4 Dioxane Bromodichloromethane cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN Hexachloro-1,3-butadiene 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene Naphthalene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Benzyl chloride 1,2-Dichlorobenzene 1,1,2-Trichloroethane MBK Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) 1,2,4-Trichlorobenzene Chlorobenzene Ethylbenzene m,p-Xylene o-Xylene Styrene Bromoform TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-03 Sample ID:VP-3 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 Notes 9/27/2017 Benzene n-Hexane Vinyl acetate 1,1-Dichloroethane Methyl Ethyl Ketone cis-1,2 Dichloroethene Tetrahydrofuran Chloroform 1,1,1-Tricloroethane Cyclohexane Carbon Tetrachloride Ethyl Acetate TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2-Dichloroethane TO-15 1,1 Dichloroethene Acetone Carbon Disulfide Methylene Chloride MTBE trans-1,2 Dicloroethene 1,3 Butadiene Bromomethane Chloroethane Trichlorofluoromethane (F 11) Isopropyl alcohol Freon 113 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2-Dichlorotetrafluoroethane(F-114) Chloromethane Vinyl Chloride Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN Propylene Dichlorodifluoromethane (Freon 12) TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-03 Sample ID:VP-3 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/11/2017 27 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 3900 200 ppbV 10/13/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 20 ppbV 10/11/2017 Senior Organic Chemist: Doug Selby Notes 1,2,4-Trichlorobenzene o-Xylene Styrene Bromoform 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Benzyl chloride 1,2-Dichlorobenzene TO-15 TO-15 Hexachloro-1,3-butadiene Naphthalene TO-15 TO-15 Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) Chlorobenzene Ethylbenzene m,p-Xylene cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene 1,1,2-Trichloroethane MBK 1,2-Dichloropropane 1,4 Dioxane Bromodichloromethane n-Heptane Trichloroethylene Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 9/27/2017 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-04 Sample ID:VP-4 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 Notes Benzene n-Hexane Vinyl acetate 1,1-Dichloroethane Methyl Ethyl Ketone cis-1,2 Dichloroethene Tetrahydrofuran Chloroform 1,1,1-Tricloroethane Cyclohexane Carbon Tetrachloride Ethyl Acetate TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2-Dichloroethane 1,1 Dichloroethene Acetone Carbon Disulfide Methylene Chloride MTBE trans-1,2 Dicloroethene 1,3 Butadiene Bromomethane Chloroethane Trichlorofluoromethane (F 11) Isopropyl alcohol Freon 113 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 9/27/2017 Propylene Dichlorodifluoromethane (Freon 12) 1,2-Dichlorotetrafluoroethane(F-114) Chloromethane Vinyl Chloride Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-04 Sample ID:VP-4 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/11/2017 3.9 0.10 ppbV 10/14/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 1300 100 ppbV 10/13/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 20 ppbV 10/11/2017 Senior Organic Chemist: Doug Selby Notes 1,2,4-Trichlorobenzene o-Xylene Styrene Bromoform 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Benzyl chloride 1,2-Dichlorobenzene TO-15 TO-15 Hexachloro-1,3-butadiene Naphthalene TO-15 TO-15 Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) Chlorobenzene Ethylbenzene m,p-Xylene cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene 1,1,2-Trichloroethane MBK 1,2-Dichloropropane 1,4 Dioxane Bromodichloromethane n-Heptane Trichloroethylene Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 9/27/2017 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-05 Sample ID:VP-5 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 35 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 150 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 Cyclohexane TO-15 Carbon Tetrachloride TO-15 Ethyl Acetate TO-15 Benzene TO-15 1,2-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 cis-1,2 Dichloroethene TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 1,1,1-Tricloroethane TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Vinyl Chloride TO-15 MTBE TO-15 trans-1,2 Dicloroethene TO-15 n-Hexane TO-15 Vinyl acetate TO-15 1,1-Dichloroethane TO-15 Freon 113 TO-15 1,1 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Methylene Chloride TO-15 Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type: 1,3 Butadiene TO-15 Bromomethane TO-15 Chloroethane TO-15 EPA Method TO-15PHIL GOALWIN 9/27/2017 Notes Trichlorofluoromethane (F 11)TO-15 Isopropyl alcohol TO-15 Propylene TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-05 Sample ID:VP-5 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/2/2017 29 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 1000 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 10 ppbV 10/2/2017 ND 20 ppbV 10/2/2017 Senior Organic Chemist: Doug Selby Benzyl chloride TO-15 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 4-Ethyltoluene TO-15 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 m,p-Xylene TO-15 o-Xylene TO-15 Styrene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 Tetrachloroethylene TO-15 Dibromochloromethane TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Trichloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 9/27/2017 Notes n-Heptane TO-15 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-06 Sample ID:VP-6 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 Carbon Tetrachloride TO-15 Ethyl Acetate TO-15 Benzene TO-15 1,2-Dichloroethane TO-15 cis-1,2 Dichloroethene TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 1,1,1-Tricloroethane TO-15 Cyclohexane TO-15 trans-1,2 Dicloroethene TO-15 n-Hexane TO-15 Vinyl acetate TO-15 1,1-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 1,1 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Methylene Chloride TO-15 MTBE TO-15 Bromomethane TO-15 Chloroethane TO-15 Trichlorofluoromethane (F 11)TO-15 Isopropyl alcohol TO-15 Freon 113 TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Vinyl Chloride TO-15 1,3 Butadiene TO-15 Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 9/27/2017 Notes Propylene TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-06 Sample ID:VP-6 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/12/2017 1.1 0.10 ppbV 10/14/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 790 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 20 ppbV 10/12/2017 Senior Organic Chemist: Doug Selby 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 Benzyl chloride TO-15 o-Xylene TO-15 Styrene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 4-Ethyltoluene TO-15 Dibromochloromethane TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 m,p-Xylene TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Tetrachloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 9/27/2017 Notes n-Heptane TO-15 Trichloroethylene TO-15 Lake Tahoe-Laundry Works 10/16/2017 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-07 Sample ID:VP-7 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 Propylene Carbon Tetrachloride TO-15 Ethyl Acetate TO-15 Benzene TO-15 1,2-Dichloroethane TO-15 cis-1,2 Dichloroethene TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 1,1,1-Tricloroethane TO-15 Cyclohexane TO-15 trans-1,2 Dicloroethene TO-15 n-Hexane TO-15 Vinyl acetate TO-15 1,1-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 1,1 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Methylene Chloride TO-15 MTBE TO-15 Bromomethane TO-15 Chloroethane TO-15 Trichlorofluoromethane (F 11)TO-15 Isopropyl alcohol TO-15 Freon 113 TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Vinyl Chloride TO-15 1,3 Butadiene TO-15 Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN #REF! Notes TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-07 Sample ID:VP-7 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/11/2017 ND 0.10 ppbV 10/14/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 130 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 20 ppbV 10/12/2017 Senior Organic Chemist: Doug Selby Trichloroethylene n-Heptane 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 o-Xylene TO-15 Styrene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 4-Ethyltoluene TO-15 Dibromochloromethane 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 Benzyl chloride TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 m,p-Xylene TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Tetrachloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN #REF! Notes TO-15 TO-15 Lake Tahoe-Laundry Works 10/16/2017 TO-15 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-08 Sample ID:VP-8 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 ND 10 ppbV 10/11/2017 Ethyl Acetate TO-15 Benzene TO-15 1,2-Dichloroethane TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 1,1,1-Tricloroethane TO-15 Cyclohexane TO-15 Carbon Tetrachloride TO-15 n-Hexane TO-15 Vinyl acetate TO-15 1,1-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 cis-1,2 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Methylene Chloride TO-15 MTBE TO-15 trans-1,2 Dicloroethene TO-15 Freon 113 TO-15 1,1 Dichloroethene TO-15 Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 9/27/2017 Notes TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Vinyl Chloride TO-15 1,3 Butadiene TO-15 Bromomethane TO-15 Chloroethane TO-15 Trichlorofluoromethane (F 11)TO-15 Isopropyl alcohol TO-15 Propylene 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-08 Sample ID:VP-8 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/11/2017 0.89 0.10 ppbV 10/14/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 260 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 20 ppbV 10/12/2017 Senior Organic Chemist: Doug Selby Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 Benzyl chloride TO-15 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 4-Ethyltoluene TO-15 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 m,p-Xylene TO-15 o-Xylene TO-15 Styrene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Tetrachloroethylene TO-15 Dibromochloromethane TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 9/27/2017 Notes n-Heptane TO-15 Trichloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-09 Sample ID:VP-9 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/20171,2-Dichloroethane TO-15 1,1,1-Tricloroethane TO-15 Cyclohexane TO-15 Carbon Tetrachloride TO-15 Ethyl Acetate TO-15 Benzene TO-15 1,1-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 cis-1,2 Dichloroethene TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 Methylene Chloride TO-15 MTBE TO-15 trans-1,2 Dicloroethene TO-15 n-Hexane TO-15 Vinyl acetate TO-15 Isopropyl alcohol TO-15 Freon 113 TO-15 1,1 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Vinyl Chloride TO-15 1,3 Butadiene TO-15 Bromomethane TO-15 Chloroethane TO-15 Trichlorofluoromethane (F 11)TO-15 Propylene TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 9/27/2017 Notes 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-09 Sample ID:VP-9 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/12/2017 ND 0.10 ppbV 10/14/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 580 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 20 ppbV 10/12/2017 Senior Organic Chemist: Doug Selby Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 Benzyl chloride TO-15 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 4-Ethyltoluene TO-15 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 m,p-Xylene TO-15 o-Xylene TO-15 Styrene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Tetrachloroethylene TO-15 Dibromochloromethane TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 Notes n-Heptane TO-15 Trichloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 9/27/2017 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-10 Sample ID:VP-10 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 Propylene Benzene 1,1-Dichloroethane Methyl Ethyl Ketone cis-1,2 Dichloroethene Tetrahydrofuran TO-15 TO-15 TO-15 TO-15 Chloroform 1,1,1-Tricloroethane Cyclohexane Carbon Tetrachloride Ethyl Acetate TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2-Dichloroethane 1,1 Dichloroethene Acetone Carbon Disulfide Methylene Chloride MTBE trans-1,2 Dicloroethene 1,3 Butadiene Bromomethane Chloroethane Trichlorofluoromethane (F 11) Isopropyl alcohol Freon 113 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 n-Hexane Vinyl acetate 9/27/2017 Dichlorodifluoromethane (Freon 12) 1,2-Dichlorotetrafluoroethane(F-114) Chloromethane Vinyl Chloride Notes Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17092802-10 Sample ID:VP-10 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 10/12/2017 ND 0.10 ppbV 10/14/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 67 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 10 ppbV 10/12/2017 ND 20 ppbV 10/12/2017 Senior Organic Chemist: Doug Selby Hexachloro-1,3-butadiene Naphthalene Benzyl chloride 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene o-Xylene Styrene Bromoform 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene 1,1,2-Trichloroethane MBK 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) Chlorobenzene Ethylbenzene m,p-Xylene Trichloroethylene 1,2-Dichloropropane 1,4 Dioxane Bromodichloromethane 9/27/2017 n-Heptane Notes Lake Tahoe-Laundry Works 10/16/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LABORATORY CONTROL STANDARD Analyte Result Units Spike level Method Analysis Date Percent Recovery 1,1 Dichloroethene 12.6 ppbV 12.5 TO-15 10/6/2017 101% Benzene 12.9 ppbV 12.5 TO-15 10/6/2017 103% Trichloroethylene 12.9 ppbV 12.5 TO-15 10/6/2017 103% Toluene 12.6 ppbV 12.5 TO-15 10/6/2017 101% Chlorobenzene 12.5 ppbV 12.5 TO-15 10/6/2017 100% Senior Organic Chemist: Doug Selby 10/18/2017 VP Well Vapor Samples Analysis Type:PHIL GOALWIN Lake Tahoe-Laundry Works EPA Method TO-15 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-01 Sample ID:VP-1 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 VP Well Vapor Samples PHIL GOALWIN Chloromethane Vinyl Chloride 1,3 Butadiene Bromomethane Freon 113 Chloroethane Chloroform 1,1 Dichloroethene Acetone Carbon Disulfide Lake Tahoe-Laundry Works 12/6/2017 Analysis Type:EPA Method TO-15 11/29/2017 Propylene Methylene Chloride MTBE trans-1,2 Dicloroethene TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Dichlorodifluoromethane (Freon 12) 1,2-Dichlorotetrafluoroethane(F-114) 1,1,1-Tricloroethane Trichlorofluoromethane (F 11) Isopropyl alcohol cis-1,2 Dichloroethene n-Hexane Vinyl acetate 1,1-Dichloroethane Methyl Ethyl Ketone Tetrahydrofuran Cyclohexane Carbon Tetrachloride Notes TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Ethyl Acetate Benzene 1,2-Dichloroethane 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-01 Sample ID:VP-1 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 120 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby Lake Tahoe-Laundry Works TO-15 Notes TO-15 TO-15 12/6/2017 VP Well Vapor Samples 11/29/2017 Analysis Type:EPA Method TO-15PHIL GOALWIN Bromodichloromethane cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene 1,1,2-Trichloroethane TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Chlorobenzene Ethylbenzene m,p-Xylene o-Xylene Styrene Bromoform 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Naphthalene 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Trichloroethylene n-Heptane 1,2-Dichloropropane 1,4 Dioxane MBK Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Benzyl chloride 1,2-Dichlorobenzene 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-02 Sample ID:VP-2 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 18 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 1100 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 TO-15 Notes 11/29/2017 Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN Chloromethane Vinyl Chloride 1,3 Butadiene Bromomethane Chloroethane Trichlorofluoromethane (F 11) Propylene Dichlorodifluoromethane (Freon 12) 1,2-Dichlorotetrafluoroethane(F-114) TO-15 TO-15 TO-15 Vinyl acetate 1,1-Dichloroethane Methyl Ethyl Ketone cis-1,2 Dichloroethene Tetrahydrofuran Chloroform 1,1,1-Tricloroethane Cyclohexane Carbon Tetrachloride Isopropyl alcohol Freon 113 1,1 Dichloroethene Acetone Carbon Disulfide Methylene Chloride MTBE trans-1,2 Dicloroethene n-Hexane Ethyl Acetate Benzene 1,2-Dichloroethane TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-02 Sample ID:VP-2 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 3200 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 370000 8000 ppbV 12/6/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby Notes 11/29/2017 n-Heptane Trichloroethylene 1,2-Dichloropropane 1,4 Dioxane Bromodichloromethane cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN Hexachloro-1,3-butadiene 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene Naphthalene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Benzyl chloride 1,2-Dichlorobenzene 1,1,2-Trichloroethane MBK Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) 1,2,4-Trichlorobenzene Chlorobenzene Ethylbenzene m,p-Xylene o-Xylene Styrene Bromoform TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-03 Sample ID:VP-3 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 160 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 Notes 11/29/2017 Benzene n-Hexane Vinyl acetate 1,1-Dichloroethane Methyl Ethyl Ketone cis-1,2 Dichloroethene Tetrahydrofuran Chloroform 1,1,1-Tricloroethane Cyclohexane Carbon Tetrachloride Ethyl Acetate 1,2-Dichloroethane TO-15 1,1 Dichloroethene Acetone Carbon Disulfide Methylene Chloride MTBE trans-1,2 Dicloroethene 1,3 Butadiene Bromomethane Chloroethane Trichlorofluoromethane (F 11) Isopropyl alcohol Freon 113 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2-Dichlorotetrafluoroethane(F-114) Chloromethane Vinyl Chloride Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN Propylene Dichlorodifluoromethane (Freon 12) TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-03 Sample ID:VP-3 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 400 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 11000 1000 ppbV 12/6/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby Notes TO-15 TO-15 TO-15 Hexachloro-1,3-butadiene Naphthalene TO-15 TO-15 1,2-Dichloropropane 1,4 Dioxane Bromodichloromethane n-Heptane 1,2,4-Trichlorobenzene o-Xylene Styrene Bromoform 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Benzyl chloride 1,2-Dichlorobenzene Trichloroethylene Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) Chlorobenzene Ethylbenzene m,p-Xylene cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene 1,1,2-Trichloroethane MBK TO-15 TO-15 TO-15 11/29/2017 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-04 Sample ID:VP-4 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 Notes Benzene n-Hexane Vinyl acetate 1,1-Dichloroethane Methyl Ethyl Ketone cis-1,2 Dichloroethene Tetrahydrofuran Chloroform 1,1,1-Tricloroethane Cyclohexane Carbon Tetrachloride Ethyl Acetate TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2-Dichloroethane 1,1 Dichloroethene Acetone Carbon Disulfide Methylene Chloride MTBE trans-1,2 Dicloroethene 1,3 Butadiene Bromomethane Chloroethane Trichlorofluoromethane (F 11) Isopropyl alcohol Freon 113 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2-Dichlorotetrafluoroethane(F-114) Chloromethane Vinyl Chloride Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 TO-15 TO-15 TO-15 11/29/2017 Propylene Dichlorodifluoromethane (Freon 12) TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-04 Sample ID:VP-4 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 190 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby Notes 1,2,4-Trichlorobenzene o-Xylene Styrene Bromoform 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Benzyl chloride 1,2-Dichlorobenzene TO-15 TO-15 Hexachloro-1,3-butadiene Naphthalene TO-15 TO-15 Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) Chlorobenzene Ethylbenzene m,p-Xylene cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene 1,1,2-Trichloroethane MBK 1,2-Dichloropropane 1,4 Dioxane Bromodichloromethane n-Heptane Trichloroethylene Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 11/29/2017 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-05 Sample ID:VP-5 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 12 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 92 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 Cyclohexane TO-15 Carbon Tetrachloride TO-15 Ethyl Acetate TO-15 Benzene TO-15 1,2-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 cis-1,2 Dichloroethene TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 1,1,1-Tricloroethane TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Vinyl Chloride TO-15 MTBE TO-15 trans-1,2 Dicloroethene TO-15 n-Hexane TO-15 Vinyl acetate TO-15 1,1-Dichloroethane TO-15 Freon 113 TO-15 1,1 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Methylene Chloride TO-15 Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type: 1,3 Butadiene TO-15 Bromomethane TO-15 Chloroethane TO-15 EPA Method TO-15PHIL GOALWIN 11/29/2017 Notes Trichlorofluoromethane (F 11)TO-15 Isopropyl alcohol TO-15 Propylene TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-05 Sample ID:VP-5 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 550 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby Benzyl chloride TO-15 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 4-Ethyltoluene TO-15 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 m,p-Xylene TO-15 o-Xylene TO-15 Styrene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 Tetrachloroethylene TO-15 Dibromochloromethane TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Trichloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 11/29/2017 Notes n-Heptane TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-06 Sample ID:VP-6 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 Carbon Tetrachloride TO-15 Ethyl Acetate TO-15 Benzene TO-15 1,2-Dichloroethane TO-15 cis-1,2 Dichloroethene TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 1,1,1-Tricloroethane TO-15 Cyclohexane TO-15 trans-1,2 Dicloroethene TO-15 n-Hexane TO-15 Vinyl acetate TO-15 1,1-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 1,1 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Methylene Chloride TO-15 MTBE TO-15 Bromomethane TO-15 Chloroethane TO-15 Trichlorofluoromethane (F 11)TO-15 Isopropyl alcohol TO-15 Freon 113 TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Vinyl Chloride TO-15 1,3 Butadiene TO-15 Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 11/29/2017 Notes Propylene TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-06 Sample ID:VP-6 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 340 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 Benzyl chloride TO-15 o-Xylene TO-15 Styrene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 4-Ethyltoluene TO-15 Dibromochloromethane TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 m,p-Xylene TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Tetrachloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 11/29/2017 Notes n-Heptane TO-15 Trichloroethylene TO-15 Lake Tahoe-Laundry Works 12/6/2017 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-07 Sample ID:VP-7 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 Propylene Carbon Tetrachloride TO-15 Ethyl Acetate TO-15 Benzene TO-15 1,2-Dichloroethane TO-15 cis-1,2 Dichloroethene TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 1,1,1-Tricloroethane TO-15 Cyclohexane TO-15 trans-1,2 Dicloroethene TO-15 n-Hexane TO-15 Vinyl acetate TO-15 1,1-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 1,1 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Methylene Chloride TO-15 MTBE TO-15 Bromomethane TO-15 Chloroethane TO-15 Trichlorofluoromethane (F 11)TO-15 Isopropyl alcohol TO-15 Freon 113 TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Vinyl Chloride TO-15 1,3 Butadiene TO-15 Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 11/29/2017 Notes TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-07 Sample ID:VP-7 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 46 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby Trichloroethylene n-Heptane 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 o-Xylene TO-15 Styrene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 4-Ethyltoluene TO-15 Dibromochloromethane 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 Benzyl chloride TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 m,p-Xylene TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Tetrachloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 11/29/2017 Notes TO-15 TO-15 Lake Tahoe-Laundry Works 12/6/2017 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-08 Sample ID:VP-8 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 Ethyl Acetate TO-15 Benzene TO-15 1,2-Dichloroethane TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 1,1,1-Tricloroethane TO-15 Cyclohexane TO-15 Carbon Tetrachloride TO-15 n-Hexane TO-15 Vinyl acetate TO-15 1,1-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 cis-1,2 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Methylene Chloride TO-15 MTBE TO-15 trans-1,2 Dicloroethene TO-15 Freon 113 TO-15 1,1 Dichloroethene TO-15 Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 11/29/2017 Notes TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Vinyl Chloride TO-15 1,3 Butadiene TO-15 Bromomethane TO-15 Chloroethane TO-15 Trichlorofluoromethane (F 11)TO-15 Isopropyl alcohol TO-15 Propylene 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-08 Sample ID:VP-8 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 46 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 Benzyl chloride TO-15 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 4-Ethyltoluene TO-15 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 m,p-Xylene TO-15 o-Xylene TO-15 Styrene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Tetrachloroethylene TO-15 Dibromochloromethane TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 11/29/2017 Notes n-Heptane TO-15 Trichloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-09 Sample ID:VP-9 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/20171,2-Dichloroethane TO-15 1,1,1-Tricloroethane TO-15 Cyclohexane TO-15 Carbon Tetrachloride TO-15 Ethyl Acetate TO-15 Benzene TO-15 1,1-Dichloroethane TO-15 Methyl Ethyl Ketone TO-15 cis-1,2 Dichloroethene TO-15 Tetrahydrofuran TO-15 Chloroform TO-15 Methylene Chloride TO-15 MTBE TO-15 trans-1,2 Dicloroethene TO-15 n-Hexane TO-15 Vinyl acetate TO-15 Isopropyl alcohol TO-15 Freon 113 TO-15 1,1 Dichloroethene TO-15 Acetone TO-15 Carbon Disulfide TO-15 Vinyl Chloride TO-15 1,3 Butadiene TO-15 Bromomethane TO-15 Chloroethane TO-15 Trichlorofluoromethane (F 11)TO-15 Propylene TO-15 Dichlorodifluoromethane (Freon 12)TO-15 1,2-Dichlorotetrafluoroethane(F-114)TO-15 Chloromethane TO-15 Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 11/29/2017 Notes 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-09 Sample ID:VP-9 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 170 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby Hexachloro-1,3-butadiene TO-15 Naphthalene TO-15 1,3-Dichlorobenzene TO-15 1,4-Dichlorobenzene TO-15 Benzyl chloride TO-15 1,2-Dichlorobenzene TO-15 1,2,4-Trichlorobenzene TO-15 Bromoform TO-15 1,1,2,2-Tetrachloroethane TO-15 4-Ethyltoluene TO-15 1,3,5-Trimethylbenzene TO-15 1,2,4-Trimethylbenzene TO-15 Chlorobenzene TO-15 Ethylbenzene TO-15 m,p-Xylene TO-15 o-Xylene TO-15 Styrene TO-15 1,1,2-Trichloroethane TO-15 MBK TO-15 Tetrachloroethylene TO-15 Dibromochloromethane TO-15 1,2-Dibromoethane (1,2 EDB)TO-15 Bromodichloromethane TO-15 cis-1,3 Dichloropropene TO-15 MIBK (Methyl Isobutyl Ketone)TO-15 Toluene TO-15 trans-1,3 Dichloropropene TO-15 Notes n-Heptane TO-15 Trichloroethylene TO-15 1,2-Dichloropropane TO-15 1,4 Dioxane TO-15 Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN 11/29/2017 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-10 Sample ID:VP-10 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 Propylene Benzene 1,1-Dichloroethane Methyl Ethyl Ketone cis-1,2 Dichloroethene Tetrahydrofuran TO-15 TO-15 TO-15 TO-15 Chloroform 1,1,1-Tricloroethane Cyclohexane Carbon Tetrachloride Ethyl Acetate TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,2-Dichloroethane 1,1 Dichloroethene Acetone Carbon Disulfide Methylene Chloride MTBE trans-1,2 Dicloroethene 1,3 Butadiene Bromomethane Chloroethane Trichlorofluoromethane (F 11) Isopropyl alcohol Freon 113 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 n-Hexane Vinyl acetate 11/29/2017 Dichlorodifluoromethane (Freon 12) 1,2-Dichlorotetrafluoroethane(F-114) Chloromethane Vinyl Chloride Notes Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17120101-10 Sample ID:VP-10 Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 210 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 10 ppbV 12/5/2017 ND 20 ppbV 12/5/2017 Senior Organic Chemist: Doug Selby Hexachloro-1,3-butadiene Naphthalene Benzyl chloride 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene o-Xylene Styrene Bromoform 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene trans-1,3 Dichloropropene 1,1,2-Trichloroethane MBK 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) Chlorobenzene Ethylbenzene m,p-Xylene Trichloroethylene 1,2-Dichloropropane 1,4 Dioxane Bromodichloromethane 11/29/2017 n-Heptane Notes Lake Tahoe-Laundry Works 12/6/2017 VP Well Vapor Samples Analysis Type:EPA Method TO-15PHIL GOALWIN TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LABORATORY CONTROL STANDARD Analyte Result Units Spike level Method Analysis Date Percent Recovery 1,1 Dichloroethene 15.5 ppbV 12.5 TO-15 12/4/2017 124% Benzene 13.9 ppbV 12.5 TO-15 12/4/2017 112% Trichloroethylene 14.7 ppbV 12.5 TO-15 12/4/2017 117% Toluene 14.4 ppbV 12.5 TO-15 12/4/2017 116% Chlorobenzene 14.0 ppbV 12.5 TO-15 12/4/2017 112% Senior Organic Chemist: Doug Selby 12/6/2017 VP Well Vapor Samples Analysis Type:PHIL GOALWIN Lake Tahoe-Laundry Works EPA Method TO-15 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix G APPENDIX G SVE/GASS Influent and Effluent Vapor Analytical Laboratory Reports E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17073101-01 Sample ID:INFLUENT Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 PHIL GOALWIN 1,2-Dichlorotetrafluoroethane(F-114) Notes Isopropyl alcohol cis-1,2 Dichloroethene Tetrahydrofuran Chloroform Lake Tahoe-Laundry Works 8/14/2017 Analysis Type: Modified EPA Method TO-15 Propylene n-Hexane Vinyl acetate 1,1-Dichloroethane Methyl Ethyl Ketone 1,1 Dichloroethene Acetone Carbon Disulfide Methylene Chloride MTBE trans-1,2 Dicloroethene TO-15 TO-15 Dichlorodifluoromethane (Freon 12) O&M Vapor Samples Cyclohexane Carbon Tetrachloride Ethyl Acetate Benzene 1,2-Dichloroethane TO-15 TO-15 7/28/2017 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 1,1,1-Tricloroethane Chloromethane Vinyl Chloride 1,3 Butadiene Bromomethane Freon 113 Chloroethane Trichlorofluoromethane (F 11) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LAB ID: 17073101-01 Sample ID:INFLUENT Date Sampled: Analyte Result Reporting Limit Units Analysis Date ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 0.015 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 ND 0.010 ppmV 8/4/2017 Senior Organic Chemist: Doug Selby TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Benzyl chloride 1,2-Dichlorobenzene 1,2,4-Trichlorobenzene Hexachloro-1,3-butadiene Naphthalene 1,1,2,2-Tetrachloroethane 4-Ethyltoluene 1,3,5-Trimethylbenzene 1,2,4-Trimethylbenzene 1,3-Dichlorobenzene 1,4-Dichlorobenzene TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 TO-15 Chlorobenzene Ethylbenzene m,p-Xylene o-Xylene Styrene Bromoform Trichloroethylene trans-1,3 Dichloropropene 1,1,2-Trichloroethane MBK Tetrachloroethylene Dibromochloromethane 1,2-Dibromoethane (1,2 EDB) O&M Vapor Samples 7/28/2017 Analysis Type: Modified EPA Method TO-15PHIL GOALWIN Bromodichloromethane cis-1,3 Dichloropropene MIBK (Methyl Isobutyl Ketone) Toluene n-Heptane 1,2-Dichloropropane 1,4 Dioxane TO-15 TO-15 TO-15 Notes TO-15 Lake Tahoe-Laundry Works 8/14/2017 E2C Remediation Project: Report Date: 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Project Mgr. LABORATORY CONTROL STANDARD Analyte Result Units Spike level Method Analysis Date Percent Recovery 1,1 Dichloroethane 9.8 ppbV 12.5 TO-15 8/4/2017 78% Benzene 11.1 ppbV 12.5 TO-15 8/4/2017 88% Trichloroethylene 11.4 ppbV 12.5 TO-15 8/4/2017 91% Tetrachloroethylene 13.1 ppbV 12.5 TO-15 8/4/2017 105% Chlorobenzene 12.2 ppbV 12.5 TO-15 8/4/2017 97% Senior Organic Chemist: Doug Selby 8/14/2017 Monthly Air Samples Analysis Type:PHIL GOALWIN Lake Tahoe-Laundry Works Modified EPA Method TO-15 Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix H APPENDIX H SVE/GASS Field Data Sheets Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix I APPENDIX I Batch Pumping Summary Tables Project Number: 1950BK26 Draft, 2017 TABLE 1 FORMER LAKE TAHOE LAUNDRY WORKS SOUTH LAKE TAHOE, CALIFORNIA PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCA 9/22/17 pre-BP 95 1.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.6 nd<0.50 nd<0.50 nd<0.50 9/27/17 between BP 43 0.51 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.67 nd<0.50 nd<0.50 nd<0.50 10/3/17 between BP 240 0.95 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/11/17 between BP 260 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/17/17 between BP 210 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/24/17 between BP 240 1.4 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 0.53 nd<0.50 nd<0.50 nd<0.50 11/3/17 between BP 14 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 1.53 nd<0.50 nd<0.50 nd<0.50 9/27/17 between BP 31 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/3/17 between BP 31 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/17/17 between BP 33 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/24/17 between BP 5.2 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 11/3/17 between BP 12 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 9/22/17 pre-BP 10 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 9/27/17 between BP 2.9 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/3/17 between BP 3.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/11/17 between BP 1.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/17/17 between BP 1.8 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/24/17 between BP 1.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 11/3/17 between BP 1.6 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 9/22/17 pre-BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 9/27/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/3/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/11/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/17/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/24/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 11/3/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 Date Event Type MW-9S MW-5S MW-2S SUMMARY OF PRE- AND POST BATCHING PUMPING GROUNDWATER ANALYTICAL DATA 1024 LAKE TAHOE BOULEVARD Well ID (µg/L) MW-1S E2C Remediation Table 1-1 Project Number: 1950BK26 Draft, 2017 TABLE 1 FORMER LAKE TAHOE LAUNDRY WORKS SOUTH LAKE TAHOE, CALIFORNIA PCE TCE VC CA CB 1,1-DCE MC Trans-1,2- DCE 1,1-DCA cis-1,2- DCE 1,2-DCA 1,1,1,2- Tetra 1,1,1-TCADateEvent Type SUMMARY OF PRE- AND POST BATCHING PUMPING GROUNDWATER ANALYTICAL DATA 1024 LAKE TAHOE BOULEVARD Well ID (µg/L) 9/22/17 pre-BP 0.60 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 9/27/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/3/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/11/17 between BP 0.62 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/17/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 10/24/17 between BP 0.78 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 11/3/17 between BP nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 9/22/17 pre-BP -------------------------- 9/27/17 between BP 210 4.7 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 2.2 nd<0.50 nd<0.50 nd<0.50 11/3/17 between BP 7.3 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 nd<0.50 Notes: Results in micrograms per liter (µg/L) = parts per billion (ppb) PCE = Tetrachloroethene (a.k.a. perchloroethene)CF = Chloroform TCE = Trichloroethene cis-1,2-DCE = cis-1,2-Dichloroethene trans-1,2-DCE = trans-1,2-Dichloroethene MC = Methylene Chloride VC = Vinyl Chloride 1,1-DCA = 1,1,-Dichloroethane 1,1-DCE = 1,2-Dichloroethene 1,1,1-TCA = 1,1,1-Trichlorethane 1,1,1,2-Tetra = 1,1,1,2-Tetrachloroethane CA = Chloroethane CB = Chlorobenzene nd = Not detected at, or above, Practical Quantitation Limits, which is indicated by value BP = Batch Pumping MW-1D MW-11S E2C Remediation Table 1-2 Project Number 1950BK26 Draft, 2017 VOCs Removed Cumulative VOCs Removed Influent Concentration Flow Rate Run Time Removal Rate (lbs)(lbs)(ppmV)(scfm)(hours)(lbs/hr) 09/22/17 0.03 0.03 1.2 114 8.00 0.004 10/03/17 0.03 0.06 0.7 193 8.00 0.004 09/27/17 0.05 0.05 1.3 182 8.00 0.006 10/11/17 0.03 0.08 1.2 114 8.00 0.004 10/17/17 0.01 0.09 0.3 229 8.00 0.004 10/24/17 0.01 0.11 0.3 216 8.00 0.004 Total 0.16 0.16 Total Run Time =48.0 Notes:Removal Rate 0.003 lbs/hr HVE = High-Vacuum Extraction Where: VOCs Removed (lbs) = Influent Concentration (ppmv) X 10-6 X Influent Flow Rate (scfm) X 1 lb-mole/379.5 ft3 X 165.82 (lb/lb-mole) X Run Time (hours)x 60 (min/hour) Extraction Well ID Extraction Date TABLE 2 SUMMARY OF VOC VAPOR-PHASE MASS REMOVED DURING BATCH PUMPING (based on field influent concentrations) FORMER LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Total Vapor Mass Removed (lbs) = LW-MW-5S LW-MW-1S E2C Remediation Table 2-1 Project Number 1950BK26 Draft, 2017 Influent Concentration PCE (hours)(µg/L)(lbs)(lbs)(lbs)(lbs)(lbs) 9/27/17 8.0 700 43 0.00025 0.00025 0.05 0.05 0.05 10/11/17 8.0 600 260 0.00130 0.00130 0.03 0.03 0.08 10/17/17 8.0 750 210 0.00131 0.00131 0.01 0.02 0.10 10/24/17 8.0 750 240 0.00150 0.00150 0.01 0.02 0.11 Gallons Extracted 2,800 0.00437 Vapor FCH Extracted 0.11 09/22/17 8.0 450 10 0.00004 0.00004 0.03 0.03 0.03 10/03/17 8.0 600 3.8 0.00002 0.00002 0.03 0.03 0.06 Gallons Extracted 1,050 0.00006 Vapor FCH Extracted 0.06 Totals 3,850 0.00442 0.16 TABLE 3 SUMMARY OF TOTAL VOC MASS REMOVED DURING BATCH PUMPING (Based on Field Influent Data & Laboratory-Derived Groundwater Analytical Data) FORMER LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Extracted GW Volume Dissolved-Phase Vapor Phase Total VOCs Removed per Event Cumulative VOCs RemovedDate Run Time Gallons GW VOC Mass Extracted MW-1S MW-5S Cumulative GW VOC Mass Extracted VVOC (from Table 2) E 2 C Remediation Table 3-1 Project Number 1950BK26 Draft, 2017 TABLE 3 SUMMARY OF TOTAL VOC MASS REMOVED DURING BATCH PUMPING (Based on Field Influent Data & Laboratory-Derived Groundwater Analytical Data) FORMER LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Extracted GW Volume Dissolved-Phase Vapor Phase Total VOCs Removed per Event Cumulative VOCs Removed Total (lbs)0.17 ug/L = Micrograms per liter GW = Groundwater lbs = Pounds VOCs = Volatile organic compounds Mass removed calculated as PCE GWVOC = Groundwater Dissolved-Phase VOCs = gallons*3.785 liters/gal*influent (ug/liter)/1,000,000 ug/gram*1 lb/454 grams VVOC = Vapor Phase VOCs Removed (lbs) = Influent Concentration (ppmv) X 10-6 X 100 X 1 lb-mole/379.5 ft3 X 165.82 (lb/lb-mole) x influent flow (scfm) x runtime E 2 C Remediation Table 3-2 Project Number 1950BK26 Draft, 2017 TABLE 4A SUMMARY OF SEPTEMBER 22, 2017 BATCH PUMPING DATA FORMER LAKE TAHOE LAUNDRY WORKS SOUTH LAKE TAHOE, CALIFORNIA (mo/dy/y (hr:min (in-Hg)(SCFM)(%)(ppmV)(ft. BTOC)(gallons)(gpm) 12:30 19.5 114 NA 1.4 6.59 13:00 19.5 114 NA 1.2 13:15 19.5 114 NA 1.0 14:15 19.5 114 NA 1.4 14:30 19.5 114 NA 1.1 15:30 19.5 114 NA 1.3 15:45 19.5 114 NA 1.0 16:45 19.5 114 NA 1.1 17:00 19.5 114 NA 1.3 18:00 19.5 114 NA 1.2 18:15 19.5 114 NA 1.0 19:15 19.5 114 NA 0.9 20:15 19.5 114 NA 1.1 20:30 Stop Ext.NM Ave.19.50 114 ---1.2 ---450 0.94 12:20 Initial 10.85 20:30 Final 10.95 0.10 12:20 Initial 9.45 20:30 Final 9.26 -0.19 1024 LAKE TAHOE BOULEVARD Well ID Date Time Vacuum Flow Oxygen Field Influent Depth to GW H2O Extracted H2O Extraction Rate Extraction at LW-MW-5S MW-5S 9/22/17 set stinger at 15' set stinger at 25' set stinger at 7' set stinger at 7' set stinger at 7' set stinger at 7' set stinger at 8' set stinger at 8' set stinger at 8' set stinger at 8' set stinger at 9' set stinger at 9' Observation at MW-9S MW-9S 9/22/17 Total Drawdown (ft.) set stinger at 9' Observation at MW-2S MW-2S 9/22/17 Total Drawdown (ft.) E2C Remediation Table - 4A-1 Project Number 1850BK26 Draft, 2017 TABLE 4B SUMMARY OF SEPTEMBER 27, 2017 BATCH PUMPING DATA FORMER LAKE TAHOE LAUNDRY WORKS SOUTH LAKE TAHOE, CALIFORNIA (mo/dy/y (hr:min (in-Hg)(SCFM)(%)(ppmV)(ft. BTOC)(gallons)(gpm) 9:00 19.5 114 NA 1.7 7.98 9:15 19.5 114 NA 1.4 9:30 19.5 114 NA 1.8 10:00 10.5 223 NA 1.2 12:00 10.5 223 NA 1.1 14:00 10.5 223 NA 1.3 16:00 10.5 223 NA 1.2 17:00 10.5 223 NA 1.0 17:00 Stop Ext.NM Ave.13.88 182 ---1.3 ---700 1.46 9:00 Initial 11.12 17:00 Final 11.20 0.08 9:00 Initial 9.47 17:00 Final 9.59 0.12 9:00 Initial 7.69 17:00 Final 7.79 0.10 9:00 Initial 7.09 17:00 Final 7.40 0.31 Depth to GW H2O Extracted set stinger at 10' set stinger at 10' 1024 LAKE TAHOE BOULEVARD Well ID Date Time Vacuum Flow Oxygen Field Influent set stinger at 11' set stinger at 11' H2O Extraction Rate Extraction at LW-MW-1S MW-1S 9/27/17 set stinger at 10' set stinger at 15' set stinger at 18' set stinger at 9' 9/27/17 Total Drawdown (ft.) Observation at MW-2S MW-2S 9/27/17 Total Drawdown (ft.) Observation at MW-12 MW-2S 9/27/17 Total Drawdown (ft.) Observation at MW-9S MW-9S 9/27/17 Total Drawdown (ft.) Observation at MW-10R MW-2S E2C Remediation Table - 4B-1 Project Number 1850BK26 Draft, 2017 TABLE 4C SUMMARY OF OCTOBER 3, 2017 BATCH PUMPING DATA FORMER LAKE TAHOE LAUNDRY WORKS SOUTH LAKE TAHOE, CALIFORNIA (mo/dy/y (hr:min (in-Hg)(SCFM)(%)(ppmV)(ft. BTOC)(gallons)(gpm) 8:20 19.0 120 19.7 1.3 7.02 9:20 10.0 229 19.5 1.1 10:20 10.0 229 19.6 0.9 11:20 10.0 229 19.1 0.8 12:20 19.0 120 19.3 0.7 13:20 10.0 229 19.5 0.8 14:20 19.0 120 19.7 0.5 15:20 10.0 229 19.4 0.3 16:20 10.0 229 19.3 0.3 16:20 Stop Ext.NM Ave.13.00 193 19.5 0.7 ---600 1.25 9:00 Initial 11.12 17:00 Final 11.20 0.08 9:00 Initial 9.47 17:00 Final 9.59 0.12 9:00 Initial 7.69 17:00 Final 7.79 0.10 9:00 Initial 7.09 17:00 Final 7.40 0.31 set stinger at 18' set stinger at 29.7' set stinger at 18' 1024 LAKE TAHOE BOULEVARD Well ID Date Time Vacuum Flow Oxygen Field Influent Depth to GW H2O Extracted set stinger at 29.7' set stinger at 17' set stinger at 17' H2O Extraction Rate Extraction at LW-MW-5S MW-5S 10/3/17 set stinger at 29.7' set stinger at 16' set stinger at 17' 10/3/17 Total Drawdown (ft.) Observation at MW-2S MW-2S 10/3/17 Total Drawdown (ft.) Observation at MW-12 MW-9S 10/3/17 Total Drawdown (ft.) Observation at MW-9S MW-9S 10/3/17 Total Drawdown (ft.) Observation at MW-10R MW- 10SR E2C Remediation Table - 4C-1 Project Number 1850BK26 Draft, 2017 TABLE 4D SUMMARY OF OCTOBER 11, 2017 BATCH PUMPING DATA FORMER LAKE TAHOE LAUNDRY WORKS SOUTH LAKE TAHOE, CALIFORNIA (mo/dy/y (hr:min (in-Hg)(SCFM)(%)(ppmV)(ft. BTOC)(gallons)(gpm) 8:45 19.5 114 NA 1.1 9.79 9:45 19.5 114 NA 1.3 10:45 19.5 114 NA 1.0 11:45 19.5 114 NA 1.2 12:45 19.5 114 NA 1.0 1:45 19.5 114 NA 1.3 2:45 19.5 114 NA 1.1 3:45 19.5 114 NA 1.1 4:45 19.5 114 NA 1.3 NM Ave.19.50 114 ---1.2 ---600 1.25 8:45 Initial 10.87 4:00 Final 10.99 0.12 8:45 Initial 9.89 4:00 Final 9.93 0.04 8:45 Initial 8.12 4:00 Final 8.14 0.02 8:45 Initial 7.21 4:00 Final 7.26 0.05 Observation at MW-12 MW-12S 10/11/17 Total Drawdown (ft.) Observation at MW-9S MW-9S 10/11/17 Total Drawdown (ft.) Observation at MW-10SR MW- 10SR 10/11/17 Total Drawdown (ft.) Observation at MW-2S MW-2S 10/11/17 Total Drawdown (ft.) H2O Extraction Rate Extraction at LW-MW-1S MW-1S 10/11/17 Stinger depth varied to avoid overheating and deadhead 1024 LAKE TAHOE BOULEVARD Well ID Date Time Vacuum Flow Oxygen Field Influent Depth to GW H2O Extracted E2C Remediation Table - 4D-1 Project Number 1850BK26 Draft, 2017 TABLE 4E SUMMARY OF OCTOBER 17, 2017 BATCH PUMPING DATA FORMER LAKE TAHOE LAUNDRY WORKS SOUTH LAKE TAHOE, CALIFORNIA (mo/dy/y (hr:min (in-Hg)(SCFM)(%)(ppmV)(ft. BTOC)(gallons)(gpm) 8:30 10.0 229 NA 0.2 9.98 9:30 10.0 229 NA 0.4 10:30 10.0 229 NA 0.3 11:30 10.0 229 NA 0.3 12:30 10.0 229 NA 0.4 1:30 10.0 229 NA 0.2 2:30 10.0 229 NA 0.3 3:30 10.0 229 NA 0.3 4:30 10.0 229 NA 0.4 NM Ave.10.00 229 ---0.3 ---750 1.56 8:30 Initial 11.14 4:30 Final 11.50 0.36 8:45 Initial 10.14 4:00 Final 10.19 0.05 8:45 Initial 8.32 4:00 Final 8.36 0.04 8:45 Initial 7.89 4:00 Final 7.97 0.08 Observation at MW-12 MW-12S 10/17/17 Total Drawdown (ft.) Observation at MW-9S MW-9S 10/17/17 Total Drawdown (ft.) Observation at MW-10SR MW- 10SR 10/17/17 Total Drawdown (ft.) Observation at MW-2S MW-2S 10/17/17 Total Drawdown (ft.) H2O Extraction Rate Extraction at LW-MW-1S MW-1S 10/17/17 Stinger depth varied to avoid overheating and deadhead 1024 LAKE TAHOE BOULEVARD Well ID Date Time Vacuum Flow Oxygen Field Influent Depth to GW H2O Extracted E2C Remediation Table - 4E-1 Project Number 1850BK26 Draft, 2017 TABLE 4F SUMMARY OF OCTOBER 24, 2017 BATCH PUMPING DATA FORMER LAKE TAHOE LAUNDRY WORKS SOUTH LAKE TAHOE, CALIFORNIA (mo/dy/y (hr:min (in-Hg)(SCFM)(%)(ppmV)(ft. BTOC)(gallons)(gpm) 8930:0 19.5 114 NA 0.4 9.94 10:30 10.0 229 NA 0.3 11:30 10.0 229 NA 0.4 12:30 10.0 229 NA 0.4 1:30 10.0 229 NA 0.3 2:30 10.0 229 NA 0.2 3:30 10.0 229 NA 0.3 4:30 10.0 229 NA 0.2 5:30 10.0 229 NA 0.3 NM Ave.11.06 216 ---0.3 ---750 1.56 9:30 Initial 11.45 5:30 Final 11.68 0.23 9:30 Initial 10.35 5:30 Final 10.38 0.03 9:30 Initial 10.33 5:30 Final 10.36 0.03 9:30 Initial 7.64 5:30 Final 7.75 0.11 Observation at MW-12 MW-12S 10/24/17 Total Drawdown (ft.) Observation at MW-9S MW-9S 10/24/17 Total Drawdown (ft.) Observation at MW-10SR MW- 10SR 10/24/17 Total Drawdown (ft.) Observation at MW-2S MW-2S 10/24/17 Total Drawdown (ft.) H2O Extraction Rate Extraction at LW-MW-1S MW-1S 10/24/17 Stinger depth varied to avoid overheating and deadhead 1024 LAKE TAHOE BOULEVARD Well ID Date Time Vacuum Flow Oxygen Field Influent Depth to GW H2O Extracted E2C Remediation Table - 4F-1 Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix J APPENDIX J Batch Pumping Field Data Sheets Project Number 1950BK26 December 15, 2017 E2C Remediation Appendix K APPENDIX K Batch Pumping Laboratory Groundwater Analytical Reports Client Sample ID:TRIP BLANK Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-01 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:TRIP BLANK Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-01 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 98%70.0%130% 1,2-Dichloroethane-d4 103%70.0%130% Toluene-d8 98%70.0%130% 4-Bromofluorobenzene 106%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-02 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene 1.7 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 95 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-02 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene 2.6 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 93%70.0%130% 1,2-Dichloroethane-d4 99%70.0%130% Toluene-d8 101%70.0%130% 4-Bromofluorobenzene 108%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-03 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 10 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-03 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 99%70.0%130% 1,2-Dichloroethane-d4 105%70.0%130% Toluene-d8 97%70.0%130% 4-Bromofluorobenzene 107%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9 Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-04 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9 Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-04 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 98%70.0%130% 1,2-Dichloroethane-d4 107%70.0%130% Toluene-d8 99%70.0%130% 4-Bromofluorobenzene 105%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11 Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-05 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 0.60 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11 Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:09/22/17 Lab ID:17100203-05 Instrument:GCMS#1 Date Analyzed:10/03/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 97%70.0%130% 1,2-Dichloroethane-d4 103%70.0%130% Toluene-d8 96%70.0%130% 4-Bromofluorobenzene 112%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 EPA 8260B QA-QC Report ELAP Certification # 2606 E2C Remediation 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Projects Covered by this QA-QC:Lake Tahoe Laundry Works Pre Batch Pumping Samples-9-22-17 Analysis Date:10/3/2017 Matrix: AQ BFB: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-52.6 105% 1,2-Dichloroethane-d4 50.4 101% Toluene-d8 47.9 96% p-Bromofluorobenzene (BFB)42.4 85% Method Blank: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-49.7 99% 1,2-Dichloroethane-d4 53.6 107% Toluene-d8 50.5 101% p-Bromofluorobenzene (BFB)54.9 110% Laboratory Control Sample:Results % Recovery 1,1-Dichloroethene 28.3 113% Trichloroethene 29.3 117% Chlorobenzene 26.6 107% Toluene 26.9 108% Benzene 28.5 114% p-Bromofluorobenzene (BFB)54.2 108% LCS Duplicate:Results % Recovery 1,1-Dichloroethene 25.4 102% Trichloroethene 27.1 108% Chlorobenzene 26.0 104% Toluene 26.5 106% Benzene 26.8 107% p-Bromofluorobenzene (BFB)55.7 111% CLIENT: 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-01 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-01 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 98%70.0%130% 1,2-Dichloroethane-d4 104%70.0%130% Toluene-d8 99%70.0%130% 4-Bromofluorobenzene 103%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-02 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-02 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 93%70.0%130% 1,2-Dichloroethane-d4 106%70.0%130% Toluene-d8 95%70.0%130% 4-Bromofluorobenzene 106%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-03 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 31 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-03 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 93%70.0%130% 1,2-Dichloroethane-d4 104%70.0%130% Toluene-d8 96%70.0%130% 4-Bromofluorobenzene 108%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-04 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 3.8 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-04 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 97%70.0%130% 1,2-Dichloroethane-d4 106%70.0%130% Toluene-d8 94%70.0%130% 4-Bromofluorobenzene 109%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-05 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene 0.95 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 240 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/03/17 Lab ID:17100502-05 Instrument:GCMS#1 Date Analyzed:10/05/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 91%70.0%130% 1,2-Dichloroethane-d4 99%70.0%130% Toluene-d8 100%70.0%130% 4-Bromofluorobenzene 108%70.0%130% Report Date: 10/12/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 EPA 8260B QA-QC Report ELAP Certification # 2606 E2C Remediation 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Projects Covered by this QA-QC:Lake Tahoe Laundry Works Pre Batch Pumping Samples-10-3-17 Analysis Date:10/5/2017 Matrix: AQ BFB: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-52.6 105% 1,2-Dichloroethane-d4 50.3 101% Toluene-d8 49.0 98% p-Bromofluorobenzene (BFB)44.4 89% Method Blank: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-49.0 98% 1,2-Dichloroethane-d4 53.8 108% Toluene-d8 47.6 95% p-Bromofluorobenzene (BFB)52.4 105% Laboratory Control Sample:Results % Recovery 1,1-Dichloroethene 28.3 113% Trichloroethene 29.3 117% Chlorobenzene 26.6 107% Toluene 26.9 108% Benzene 28.5 114% p-Bromofluorobenzene (BFB)54.2 108% LCS Duplicate:Results % Recovery 1,1-Dichloroethene 25.4 102% Trichloroethene 27.1 108% Chlorobenzene 26.0 104% Toluene 26.5 106% Benzene 26.8 107% p-Bromofluorobenzene (BFB)55.7 111% CLIENT: 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:Trip Blank Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch Pumping Date Sampled:10/11/17 Lab ID:17102502-01 Instrument:GCMS#1 Date Analyzed:10/25/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:Trip Blank Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch Pumping Date Sampled:10/11/17 Lab ID:17102502-01 Instrument:GCMS#1 Date Analyzed:10/25/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 99%70.0%130% 1,2-Dichloroethane-d4 101%70.0%130% Toluene-d8 100%70.0%130% 4-Bromofluorobenzene 105%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/11/17 Lab ID:17102502-02 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 0.62 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/11/17 Lab ID:17102502-02 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 100%70.0%130% 1,2-Dichloroethane-d4 106%70.0%130% Toluene-d8 100%70.0%130% 4-Bromofluorobenzene 104%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/11/17 Lab ID:17102502-03 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/11/17 Lab ID:17102502-03 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 107%70.0%130% 1,2-Dichloroethane-d4 107%70.0%130% Toluene-d8 105%70.0%130% 4-Bromofluorobenzene 104%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/11/17 Lab ID:17102502-04 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 1.8 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/11/17 Lab ID:17102502-04 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 103%70.0%130% 1,2-Dichloroethane-d4 104%70.0%130% Toluene-d8 102%70.0%130% 4-Bromofluorobenzene 106%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/11/17 Lab ID:17102502-05 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 260 1.0 2 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/11/17 Lab ID:17102502-05 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 105%70.0%130% 1,2-Dichloroethane-d4 102%70.0%130% Toluene-d8 102%70.0%130% 4-Bromofluorobenzene 103%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 EPA 8260B QA-QC Report ELAP Certification # 2606 E2C Remediation 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Projects Covered by this QA-QC:Lake Tahoe Laundry Works Pre Batch Pumping Samples-10-11-17 Analysis Date:10/25/2017 Matrix: AQ BFB: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-52.1 104% 1,2-Dichloroethane-d4 51.4 103% Toluene-d8 49.2 98% p-Bromofluorobenzene (BFB)44.4 89% Method Blank: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-52.0 104% 1,2-Dichloroethane-d4 52.8 106% Toluene-d8 51.1 102% p-Bromofluorobenzene (BFB)52.6 105% Laboratory Control Sample:Results % Recovery 1,1-Dichloroethene 22.1 88% Trichloroethene 24.4 98% Chlorobenzene 27.3 109% Toluene 28.1 112% Benzene 25.3 101% p-Bromofluorobenzene (BFB)51.2 102% LCS Duplicate:Results % Recovery 1,1-Dichloroethene 22.4 90% Trichloroethene 25.6 102% Chlorobenzene 27.6 110% Toluene 27.6 111% Benzene 24.8 99% p-Bromofluorobenzene (BFB)51.6 103% CLIENT: 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-01 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-01 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 96%70.0%130% 1,2-Dichloroethane-d4 96%70.0%130% Toluene-d8 101%70.0%130% 4-Bromofluorobenzene 91%70.0%130% Report Date: 10/18/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-02 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-02 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 92%70.0%130% 1,2-Dichloroethane-d4 94%70.0%130% Toluene-d8 101%70.0%130% 4-Bromofluorobenzene 94%70.0%130% Report Date: 10/18/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-03 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 1.8 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-03 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 91%70.0%130% 1,2-Dichloroethane-d4 94%70.0%130% Toluene-d8 98%70.0%130% 4-Bromofluorobenzene 91%70.0%130% Report Date: 10/18/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-04 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene 1.4 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 210 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-04 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 91%70.0%130% 1,2-Dichloroethane-d4 94%70.0%130% Toluene-d8 101%70.0%130% 4-Bromofluorobenzene 92%70.0%130% Report Date: 10/18/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-05 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 33 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Batch Pumping Samples Date Sampled:10/17/17 Lab ID:17101801-05 Instrument:GCMS#1 Date Analyzed:10/18/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 94%70.0%130% 1,2-Dichloroethane-d4 96%70.0%130% Toluene-d8 100%70.0%130% 4-Bromofluorobenzene 95%70.0%130% Report Date: 10/18/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 EPA 8260B QA-QC Report ELAP Certification # 2606 E2C Remediation 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Projects Covered by this QA-QC:Lake Tahoe Laundry Works Batch Pumping Samples-10-17-17 Analysis Date:10/18/2017 Matrix: AQ BFB: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-49.4 99% 1,2-Dichloroethane-d4 44.3 89% Toluene-d8 50.1 100% p-Bromofluorobenzene (BFB)50.5 101% Method Blank: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-48.6 97% 1,2-Dichloroethane-d4 47.6 95% Toluene-d8 50.1 100% p-Bromofluorobenzene (BFB)47.0 94% Laboratory Control Sample:Results % Recovery 1,1-Dichloroethene 23.9 95% Trichloroethene 27.5 110% Chlorobenzene 29.2 117% Toluene 28.5 114% Benzene 29.5 118% p-Bromofluorobenzene (BFB)47.8 96% LCS Duplicate:Results % Recovery 1,1-Dichloroethene 23.7 95% Trichloroethene 26.8 107% Chlorobenzene 28.6 114% Toluene 28.1 112% Benzene 28.5 114% p-Bromofluorobenzene (BFB)45.3 91% CLIENT: 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:Trip Blank Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch Pumping Date Sampled:10/24/17 Lab ID:17102501-01 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:Trip Blank Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch Pumping Date Sampled:10/24/17 Lab ID:17102501-01 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 105%70.0%130% 1,2-Dichloroethane-d4 105%70.0%130% Toluene-d8 101%70.0%130% 4-Bromofluorobenzene 107%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-02 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 0.78 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-02 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 102%70.0%130% 1,2-Dichloroethane-d4 106%70.0%130% Toluene-d8 107%70.0%130% 4-Bromofluorobenzene 105%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-03 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-03 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 107%70.0%130% 1,2-Dichloroethane-d4 105%70.0%130% Toluene-d8 101%70.0%130% 4-Bromofluorobenzene 103%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-04 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 5.2 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-04 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 105%70.0%130% 1,2-Dichloroethane-d4 106%70.0%130% Toluene-d8 102%70.0%130% 4-Bromofluorobenzene 105%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-05 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 1.7 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-05 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 99%70.0%130% 1,2-Dichloroethane-d4 102%70.0%130% Toluene-d8 102%70.0%130% 4-Bromofluorobenzene 102%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-06 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene 1.4 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 240 1.0 2 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works Pre Batch pumping Date Sampled:10/24/17 Lab ID:17102501-06 Instrument:GCMS#1 Date Analyzed:10/26/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene 0.53 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 104%70.0%130% 1,2-Dichloroethane-d4 107%70.0%130% Toluene-d8 102%70.0%130% 4-Bromofluorobenzene 103%70.0%130% Report Date: 10/26/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 EPA 8260B QA-QC Report ELAP Certification # 2606 E2C Remediation 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Projects Covered by this QA-QC:Lake Tahoe Laundry Works Pre Batch Pumping Samples-10-24-17 Analysis Date:10/25/2017 Matrix: AQ BFB: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-52.1 104% 1,2-Dichloroethane-d4 51.4 103% Toluene-d8 49.2 98% p-Bromofluorobenzene (BFB)44.4 89% Method Blank: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-52.0 104% 1,2-Dichloroethane-d4 52.8 106% Toluene-d8 51.1 102% p-Bromofluorobenzene (BFB)52.6 105% Laboratory Control Sample:Results % Recovery 1,1-Dichloroethene 22.1 88% Trichloroethene 24.4 98% Chlorobenzene 27.3 109% Toluene 28.1 112% Benzene 25.3 101% p-Bromofluorobenzene (BFB)51.2 102% LCS Duplicate:Results % Recovery 1,1-Dichloroethene 22.4 90% Trichloroethene 25.6 102% Chlorobenzene 27.6 110% Toluene 27.6 111% Benzene 24.8 99% p-Bromofluorobenzene (BFB)51.6 103% CLIENT: 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-01 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-11S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-01 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 101%70.0%130% 1,2-Dichloroethane-d4 100%70.0%130% Toluene-d8 93%70.0%130% 4-Bromofluorobenzene 101%70.0%130% Report Date: 11/7/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-02 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene ND 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-9S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-02 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 105%70.0%130% 1,2-Dichloroethane-d4 103%70.0%130% Toluene-d8 95%70.0%130% 4-Bromofluorobenzene 100%70.0%130% Report Date: 11/7/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-03 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 1.6 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-5S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-03 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 107%70.0%130% 1,2-Dichloroethane-d4 103%70.0%130% Toluene-d8 97%70.0%130% 4-Bromofluorobenzene 102%70.0%130% Report Date: 11/7/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-04 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 12 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-2S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-04 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 103%70.0%130% 1,2-Dichloroethane-d4 101%70.0%130% Toluene-d8 96%70.0%130% 4-Bromofluorobenzene 106%70.0%130% Report Date: 11/7/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-05 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 14 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1S Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-05 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 101%70.0%130% 1,2-Dichloroethane-d4 102%70.0%130% Toluene-d8 96%70.0%130% 4-Bromofluorobenzene 104%70.0%130% Report Date: 11/7/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1D Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-06 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor Dichlorodifluoromethane ND 0.50 1 Chloromethane ND 0.50 1 Vinyl Chloride ND 0.50 1 Bromomethane ND 0.50 1 Chloroethane ND 0.50 1 Trichlorofluoromethane ND 0.50 1 Trans-1,2-Dichloroethene ND 0.50 1 1,1-Dichloroethene ND 0.50 1 Methyl Tert-Butyl Ether (MTBE)ND 0.50 1 Methylene Chloride ND 0.50 1 Diisopropyl Ether (DIPE)ND 0.50 1 1,1-Dichloroethane ND 0.50 1 Ethyl Tert-Butyl Ether (ETBE)ND 0.50 1 Tert-Butyl Alcohol (TBA)ND 5.0 1 1,1,1-Trichloroethane ND 0.50 1 1,3-Dichloropropene ND 0.50 1 1,1-Dichloropropene ND 0.50 1 Carbon Tetrachloride ND 0.50 1 Tert-Amyl Methyl Ether (TAME)ND 0.50 1 Chloroform ND 0.50 1 Benzene ND 0.50 1 Bromochloromethane ND 0.50 1 1,2-Dichloroethane ND 0.50 1 Trichloroethene ND 0.50 1 1,2-Dichlorpropane ND 0.50 1 Dibromomethane ND 0.50 1 Bromodichloromethane ND 0.50 1 Toluene ND 0.50 1 Trans-1,3-Dichloropropene ND 0.50 1 Tetrachloroethene 7.3 0.50 1 1,3-Dichloropropane ND 0.50 1 1,1,2-Trichloroethane ND 0.50 1 Ethlybenzene ND 0.50 1 1,2-Dibromoethane ND 0.50 1 Total Xylenes ND 1.0 1 Dibromochloromethane ND 0.50 1 Chlorobenzene ND 0.50 1 2,2 Dichloropropane ND 0.50 1 Cis-1,3-Dichloropropane ND 0.50 1 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 Client Sample ID:LW-MW-1D Client:E2C Remediation Matrix:Aqueous Project:Lake Tahoe-Laundry Works: Water Sample Date Sampled:11/03/17 Lab ID:17110601-06 Instrument:GCMS#1 Date Analyzed:11/06/17 Operator:Doug Selby Dilution Compounds:Factor 1,1,1,2-Tetrachloroethane ND 0.50 1 Styrene ND 0.50 1 Isopropylbenzene ND 0.50 1 Propylbenzene ND 0.50 1 1,3,5-Trimethylbenzene ND 0.50 1 2-Chlorotoluene ND 0.50 1 Bromobenzene ND 0.50 1 Bromoform ND 0.50 1 4-Chlorotoluene ND 0.50 1 Tert-Butylbenzene ND 0.50 1 1,2,4-Trimethylbenzene ND 0.50 1 1,2,3-Trichloropropane ND 0.50 1 Sec-Butylbenzene ND 0.50 1 1,1,2,2-Tetrachloroethane ND 0.50 1 4-Isopopyltoluene ND 0.50 1 1,3-Dichlorobenzene ND 0.50 1 Butylbenzene ND 0.50 1 1,4-Dichlorobenzene ND 0.50 1 1,2-Dichlorobenzene ND 0.50 1 1,2-dibromo-3-chloropropane ND 0.50 1 1,1,2,3,4,4-hexachloro-1,3-butadiene ND 0.50 1 1,2,4-Trichlorobenzene ND 0.50 1 Naphthalene ND 0.50 1 1,2,3-Trichlorobenzene ND 0.50 1 Cis-1,2-Dichloroethene ND 0.50 1 Surrogates:% Recovery:Lower Limit:Upper Limit: Dibromofluoromethane 107%70.0%130% 1,2-Dichloroethane-d4 104%70.0%130% Toluene-d8 94%70.0%130% 4-Bromofluorobenzene 103%70.0%130% Report Date: 11/7/2017 Analysis For Volatile Compounds by EPA Method 8260B Concentration ug/L (ppb) Reporting Limit ug/L (ppb) 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750 EPA 8260B QA-QC Report ELAP Certification # 2606 E2C Remediation 1020 Winding Creek Rd., Suite 110 Roseville, CA 95678 Projects Covered by this QA-QC:Lake Tahoe Laundry Works: Water Sample-11-3-17 Analysis Date:11/6/2017 Matrix: AQ BFB: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-51.3 103% 1,2-Dichloroethane-d4 53.4 107% Toluene-d8 46.6 93% p-Bromofluorobenzene (BFB)47.0 94% Method Blank: Internal Standards Results % Recovery Benzene, fluoro 50.0 100% Benzene-d5, chloro-50.0 100% 1,4-Dichlorobenzene-d4 50.0 100% Surrogate Standards Methane, dibromofluoro-49.9 100% 1,2-Dichloroethane-d4 48.8 98% Toluene-d8 47.4 95% p-Bromofluorobenzene (BFB)49.1 98% Laboratory Control Sample:Results % Recovery 1,1-Dichloroethene 22.8 91% Trichloroethene 27.4 110% Chlorobenzene 27.9 111% Toluene 27.0 108% Benzene 26.2 105% p-Bromofluorobenzene (BFB)52.3 105% LCS Duplicate:Results % Recovery 1,1-Dichloroethene 22.1 89% Trichloroethene 28.1 112% Chlorobenzene 26.6 106% Toluene 26.0 104% Benzene 26.5 106% p-Bromofluorobenzene (BFB)51.1 102% CLIENT: 1020 Winding Creek Rd, Suite 110, Roseville, CA 95678 Phone: (916) 782-8700 Fax: (916) 782-8750