SL0601754315_Interim Remedial System Install_E2C_08.11.2010Project Number 1950BK49!27 August 12. 2010
Vacuum isocontours from deep observation well data (Appendix V, Figure V-8B) show
strong positive pressure from the air sparging system; however, vacuum was observed
along the northern edge of the site building (VE-17, VE-18, VE-19, and VE-20). The
vacuum isocontours over the western portion of the site are dominated by strong
positive pressure in VE-2D.
Based on the data from pilot test #9, operation of nine (9) shallow SVE wells (VE-lS,
VE-2S, VE-20S, HVE-1, HVE-2, HVE-3, HVE-4, HVE-5 and HVE-6), plus air sparging
using all twenty-seven (27) sparge wells, created a strong vacuum under the western
half of the site and a strong positive pressure influence over the entire Site. Measured
vapor influent concentrations were relatively low, at 83 ppmV.
IV.C SVE Pilot Testing Radii of Influence Conclusions
At the Site, the SVE testing in April 2010 indicated that large radii of influence can be
created in all or part of the site, depending on which combination of SVE wells are
utilized. Vacuum influence over the entire site, including under the building and into
Lake Tahoe Boulevard, can be readily achieved using all shallow SVE wells. Vacuum
influence over selected portions of the Site can be readily achieved by selective use of
groups of SVE wells. Pilot test data indicate that the Site is highly suitable for
remediation using SVE/GASS.
IV.D Interim SVE/GASS Operation
Interim Site remediation, using the SVE/GASS commenced on April 9, 2010, after
completion of pilot testing. Interim system operation typically consisted of operating
all SVE wells (vertical and horizontal) and all sparge wells. Table 7 summarizes
SVE/GASS operational data from April 9 through June 6, 2010. Interim system
operation will continue until a final remediation plan is approved by the CRWQCB.
IV.E COC Mass Removal
Estimates of COC mass removed from April 9 through June 1, 2010, were calculated
based on soil vapor flow rates, laboratory influent concentrations and run times. The
resultant estimates of volatile organic compound removal (calculated as total
PCE/TCE and associated degradation products mass) are summarized in Table 7.
Vapor influent samples collected on April 8 and 9, 2010, were analyzed at the
laboratory (see Table 9 for summary of data and Appendix W for copies of laboratory
reports). The laboratory data appeared disparate from the field data; however,
laboratory analytical data are generally considered more accurate than field data, as
the laboratory analysis is not influenced by external factors, such as the oxygen
content in the influent stream.
IV.E.1 Estimates of COC Mass Removal Rates
In total, approximately 22.53 pounds (lbs) of COC mass were removed from the
subsurface during the pilot testing period (see Table 7). The total runtime of interim
SVE/GASS operation, through June 1, 2010 was approximately 1,260 hours, which
equates to an average mass removal rate of approximately 0. 017 lb/ hr (see Table 7).
E2C Remediation 15
Project Number 1950BK49/27 August 12. 2010
v. DRAFT REMEDIAL ACTION PLAN
Based on the results of the installation and testing work discussed above, the selected
In-Situ Cleanup Alternative of soil vapor extraction combined with groundwater air
sparging has been shown to be highly effective. This Draft Remedial Action Plan
(Draft RAP) presents the details regarding continued use of the installed Interim
Remediation System for ongoing cleanup.
V.A Purpose of DRAP
The purpose of a Draft RAP is to describe the implementation of a remedial action or
set of remedial actions, which will permanently prevent or minimize the release of
hazardous substances or contaminants from the site such that they do not migrate or
cause imminent and substantial endangerment to present or future public health and
welfare, or the environment.
This Draft RAP describes activities that will take place for the project including
remediation of soil and groundwater impacted by VOCs, primarily PCE, TCE and
associated breakdown products to achieve the Site Cleanup goals that were proposed
in the IRAWP (E2C, 2009a).
V.A.1 Proposed Groundwater Cleanup Goals
PCE and TCE cleanup goals for groundwater were proposed in the IRAWP as follows:
• PCE -5.0 µg/L (the Federal and State MCL for PCE); and
• TCE -5.0 µg/L (the Federal and State MCL for TCE).
The CRWQCB approved the IRAWP by letter, dated September 1, 2009 (CRWQCB,
2009b)
V.B. Site Conceptual Model
A Site Conceptual Model (SCM) has been developed using historic site data and
information obtained during site investigations.
V.B.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).
V.B.2 Regional Geology and Hydrogeology
The near-surface geology in the vicinity of the Site primarily consists of alluvial
deposits, including sands, silty sands, and silts and clays to at least 140 feet bgs (IT
Corp, 2000).
In January 2006, PES Environmental, Inc. (PES) reported the following (PES, 2006):
"Remediation via pump and treat systems, soil vapor extraction, and well-head
treatment for petroleum hydrocarbons has been conducted at numerous locations
in the immediate vicinity of the property. Active groundwater remediation was
conducted at the former Shell-branded Service Station at 1020 Emerald Bay Road
and USA Gasoline Corporation Service Station No. 7 at 1140 Emerald Bay Road.
According to the RWQCB, wellhead treatment using air stripping is being
17
Proiect Number 1950BK49!27 August 12. 2010
principal path of flow, or average groundwater flow direction for the Site, was from the
northwest corner of the intersection of Glorene Avenue with Lake Tahoe Boulevard in
a southeasterly direction.
Groundwater table elevations fluctuate significantly, dependent upon time of year.
For example, at LW-MW-lS, in December 2009, the groundwater elevation was
6,177.72 feet MSL, whereas the groundwater elevation at that well in June 2010 was
6,180.25 feet MSL, a difference of 3.93 feet (see Table 2). Based on the groundwater
table elevation data collected to date at the Site (maximum of four monitoring events),
the higher groundwater elevations occur in the summer, the lowest groundwater
elevations occur in the winter and the intermediate groundwater elevations occur in
the spring and fall (see Graph G-1, Hydrograph).
V.B.4 Site Characterization and Distribution of Contaminants
This section discusses historical soil and groundwater site assessment activities. The
distribution of contaminants in soil and groundwater is also discussed. Based on the
historical assessment activities, a vadose zone soil plume and a dissolved-phase
groundwater plume that require cleanup have been identified (see Figure 4).
Site Assessments
From October 2003 through November 2005, PES Environmental, Inc. (PES)
conducted soil and shallow groundwater investigation work (PES, 2003, 2004, 2005
and PES 2006). The results of these investigations were summarized and are depicted
in the plots included in Appendix N (PES Site Plots of Soil and Groundwater
Analytical Results).
In August and September 2008, E2C Remediation (E2C) conducted a site investigation
to further evaluate vadose zone and groundwater conditions beneath and adjacent to
the Site. Those findings were discussed in the Site Investigation Report of Findings,
dated September 22, 2008 (E2C, 2008).
In November 2009, E2C conducted additional site assessment with installation of the
interim remediation pilot test system (included installation of additional monitoring
wells). Following the November installation work, groundwater samples were
collected on two (2) occasions (Fourth Quarter 2009 and First Quarter 2010, which
also served for the pre-pilot test groundwater baseline) prior to startup of the interim
remediation system pilot test. The findings of the system installation the subsequent
groundwater monitoring are discussed below.
Soil Chemical Conditions
PCE, TCE, vinyl chloride (VC), cis-1,2-DCE, Trans-1,2-Dichloroethene (Trans-1,2-
DCE), and 1,2-Dichloroethane (1,2-DCA) were reported in soil samples collected
during this investigation (see the table in Appendix Q for a tabular summary of data).
Note: 1,2-DCA was reported in only one (1) soil sample (LW-MW-3-20) at a
concentration of 0.19 µg/L and a review of the PES soil analytical summary data
indicates that 1,2-DCA was not reported as detectable (see Appendix N, Plate 4).
Vadose Zone and SZA
The VOC concentrations reported were generally low, except at the LW-MW-lS boring
where PCE was reported at a concentration of 410 milligrams per kilogram (mg/Kg)
(analysis of a split-sample indicated a concentration of 532 mg/Kg) at the 7-foot
depth, which indicated a zone of source material in that area. However, plots of
E2C Remediation 19
Protect Number 1950BK49/27 August 12. 2010
concentrations in cross-section indicated that there were likely two (2) soil source
areas for the impact found in the SZA: 1) in the area of on-site boring LW-MW-1; and
2) northwest and north of the area encompassed by off-site borings LW-MW-4, LW-
MW-7 and LW-MW-8 (see plots in Appendix R) (E2e, 2008).
SZA Groundwater Chemical Conditions
Dissolved-phase PeE was reported in the upgradient well (LW-MW-12S) at a
concentration of 34.3 µg/L in March 2010, an increase from the 10.7 µg/L reported in
the Fourth Quarter 2009. Upgradient well LW-MW-lOS was reported to contain
dissolved-phase PeE at a low concentration (1.04 µg/L), a decrease from the 15.8
µg/L reported in the Fourth Quarter 2009. This data appear to indicate that
upgradient background concentrations in the vicinity of the Site fluctuate. Additional
monitoring will be needed to evaluate longer-term trends.
The on-site Source Area appears to be located in the area of LW-MW-lS with the
highest voe concentrations occurring in the area between that well and LW-MW-9S.
The PeE groundwater plume appears to be defined in the northerly direction, as
evidenced by the reported low concentration of PeE at LW-MW-lS and the reported
non-detect at LW-MW-5S. The PeE concentration reported at LW-MW-lS decreased
significantly to 1,850 µg/L (2,000 µg/L in duplicate sample) as compared to the
concentration of 5,150 µg/L reported in the Fourth Quarter 2009. Dissolved-phase
TeE at LW-MW-lS was reported as non-detect in March 2010, a significant reduction
from the concentrations reported in August 2008 and December 2009 (74.0 µg/L and
72.7 µg/L, respectively). Future monitoring data can be used to evaluate
concentration trends.
Low concentrations of dissolved-phase volatile fuel hydrocarbon compounds,
specifically benzene and MtBE were reported at four (4) of the site wells (LW-MW-2S,
LW-MW-5S and LW-MW-13S) and at the off-site well (OS-1) (see Table 3 for summary
of data).
Shallow Soil-Gas
Shallow soil-vapor samples were collected on April 9, 2010 from nine (9) of the ten
(10) VP wells. Well VP-3 contained water and a sample could not be collected.
Summary of Shallow Soil-Vapor Analytical Data
Shallow soil-vapor analytical data are summarized in Table 4 and as follows (see
Appendix X for copies of purge data sheets and Appendix Y for copy of laboratory
report):
• PeE was reported in seven (7) of the nine (9) VP wells at concentrations ranging
from a low of 0.012 parts per million by volume (ppmV) (VP-5) to a high of 1.98
ppmV (VP-10);
• TeE was reported at two (2) VP wells (VP-2 and VP-10) at concentrations of
0.029 ppmV and 0.047 ppmV, respectively;
• eis-1,2-DeE was reported at three (3) VP wells (VP-2, VP-5 and VP-10) at
concentrations of0.38 ppmV, 0.015 ppmV and 0.050 ppmV, respectively; and
• All other voes analyzed for were reported as non-detect at the respective
detection limit.
Project Number 1950BK49127 August 12, 2010
Interim Remediation System Pilot Testing
On April 6, 2010, E2C commenced two (2) months of pilot testing of the interim site
remedial system, SVE/GASS. E2C subsequently completed a preliminary evaluation
of the testing data collected (see discussion above for detailed description of testing
and results). Pilot testing data indicate that the SVE/GASS has a significant
influence over the CRWQCB-specified areal extent of SZA monitoring and cleanup
zone (see Figure 4 for plot of specified area).
Summary of SCM
From October 2003 through November 2005, PES conducted soil and shallow
groundwater investigation work (PES, 2003, 2004, 2005 and PES 2006). In August
and September 2008 and November 2009, E2C conducted site investigations to
further evaluate vadose zone and groundwater conditions beneath and adjacent to the
Site. Based on the investigations, an area of vadose zone soil impact and
groundwater impact by PCE, TCE and associated degradation products has been
identified in the area of the Lake Tahoe Laundry Works (see Figure 4). The initial site
groundwater monitoring wells were installed in August 2008 followed by subsequent
groundwater monitoring well installations in November 2010. Quarterly groundwater
monitoring commenced in December 2009.
An evaluation of the health risk to human or ecological receptors by residual
contamination indicates that there are no potential risks for dermal contact or
inhalation as the vadose zone impacted area is covered by asphalt and landscaping
that has been covered by bristle-coil mesh covered by wood chips. In addition,
negative pressure exerted by the operating vapor extraction system will significantly
reduce the potential for volatilization of the VOCs into ambient air. There may be
moderate risk to construction and/ or landscape workers should underground
excavating be performed in the vadoze zone impacted area. Appropriate dust
migration control procedures should be used during excavation activities.
Three (3) water supply wells were previously identified in the Site area. Reportedly, a
wellhead treatment system was installed at the Clement Well to treat pumped water
from the wells for MtBE.
Pilot testing of an interim remediation system installed during the period of November
2009 through April 2010 indicate that SVE/GASS is a highly effective cleanup
alternative for the impacted subsurface areas.
V.C Feasibility Study/Remedial Options Evaluation
V.C.1 Purpose of Feasibility Study/Remedial Options Evaluation
The purpose of a Feasibility Study /Remedial Options Evaluation is to identify a
remedial action or set of remedial actions, which will permanently prevent or minimize
the release of hazardous substances or contaminants from the site such that they do
not migrate or cause an imminent and substantial endangerment to present or future
public health and welfare, or the environment. Based on the Feasibility Study, a
Cleanup Plan has been prepared and is included in this combined document. The
Site Background and Nature and Extent of Contamination were discussed above in
the SCM. This Feasibility Study (FS) describes:
• Contaminant Fate and Transport (Section V.C.2);
• Biological and Chemical Degradation (Section V.C.3);
E2C Remediation 23
Project Number 1950BK49/27 August 12. 2010
account for this condition by focusing vapor capture in the depth interval where PCE
vapors naturally tend to accumulate. Hence, the installation of the horizontal vapor
extraction wells through the Source Area and vertical vapor extraction wells elsewhere
for the interim remedial system pilot testing (see Sections II and III above).
The migration of PCE dissolved in the groundwater does not appear to be retarded, as
concentrations have been reported at the furthest downgradient monitoring well. The
highest concentrations of dissolved-phase contaminants occur in the area of LW-MW-
lS. Therefore, the groundwater remediation strategy should focus on aggressive
removal of high-concentration contaminants in the Source Area while accounting for
low-concentration contaminants in the outer areas.
V.D REMEDIAL ACTION GOALS
V.D.1 Site Soil Quality Restoration Goals
Soil quality restoration goals are designed based on the following criteria:
• Protection of human health;
• Direct/indirect exposure to contaminated soil (ingestion, dermal absorption,
inhalation of vapors and dust in outdoor air);
•
•
Protection of groundwater quality (leaching of chemicals from soil);
Protection of terrestrial (nonhuman receptors); and
• Protection against gross contamination concerns (nuisance, odors, etc,) and
general resource degradation.
V.D.2 Site Water Quality Restoration Goals
The existing and potential beneficial uses of groundwater at the Site include
municipal and domestic water supply and industrial use. The beneficial use with the
most stringent set of water quality goals is municipal and domestic supply.
Applicable water quality restoration goals are summarized in the table below (note:
The most restrictive MCL is listed).
Constituent Water Qualitv Goal (µ,,./Ll Standard
PCE 5 Federal and State MCL
TCE 5 Federal and State MCL
cis-1,2-DCE 6 State MCL
Trans-1,2-DCE 10 State MCL
Vinvl Chloride 0.50 State MCL
MCL=maximum contaminant level.
It should be noted that shallow groundwater that is contaminated by VOCs at the Site
is not being ingested, as the identified water supply wells are all located upgradient of
the Site and water pumped from those wells is reportedly being treated (see Section
V.B.5 above).
E2C Remediation 28
Project Number 1950BK49/27
FIGURES
Figure 1 Site Location Map
Figure 2 Site Plan
Figure 3 Well and Trenching Locations Plot Plan
Figure 4 Areal Cleanup Extent Plot
Figure 5 Remediation System As-Built Schematic
Figure 6 VP Well As-Built Diagram
Figure 7 Water Supply Well Location Plot
August 12, 2010
FIGURE
1Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
SITE
SITE LOCATION MAP
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
FIGURE2Phone: (661) 831-6906Fax: (661) 831-6234E C Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313LAKE 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-10SN
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N
AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S
New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1
VP Well
HVE-1 Horizontal SVE Well
(screen location)
LW-MW-1S
LW-MW-5S
LW-MW-2S
WELL AND TRENCHING LOCATIONS
PLOT PLAN
FIGURE
3
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
AS-1
AS-2
AS-3
AS-4 AS-5
AS-10
AS-8
AS-16AS-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-26
AS-27
Horizontal SVE Well Locations
(southern trench-330’HVE/northern trench 3 30’ HVE)
EQUIPMENT
COMPOUND
APPROXIMATE LOCATIONS OF TRENCH LINES
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
SZA Groundwater
Monitoring Well
LW-MW-1S
0FT 50
F
T
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
REMEDIATION AREA
FIGURE
4
Area of Groundwater CleanupApproximate Extent of Vadose Zone Soil Cleanup
Based on Proposed Soil Cleanup Goals of:
PCE = 0.37 Mg/Kg
TCE = 0.46 mg/Kg
cis-1,2-DCE = 0.19 mg/Kg
Trans-1,2-DCE = 0.67 mg/Kg
Vinyl Chloride = 0.05 mg/Kg
1,2-DCA = 0.0045 mg/Kg
REMEDIATION SYSTEM AS-BUILT SCHEMATICPhone: (661) 831-6906Fax: (661) 831-62345300 Woodmere Dr., Suite 105Bakersfield, CA 93313EC Remediation22,000-lb Vapor-Phase GAC Canisters(in series)500 SCFM BLOWER UNITKNOCKOUT POT(entrained water collected and transported to recycler)27 AS WELLSVE MANIFOLD - VE & HVE Wells(along north and east walls)
AIR
S
P
A
R
G
E
P
L
U
M
BI
N
G
VAPOR EXTRACTION PLU
MBING
(includes HVE
Wells)ELECTRICAL FEED FROM REAR OF RALEY’SXEQUIPMENT PADAS Manifold(along west wall)20 NESTEDTWO- WELLVERTICAL VE WELLS25-hp Air CompressorLAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIAVAPOR SAMPLING PORTSREMEDIATION EQUIPMENT ENCLOSED SHED(winterized and soundproofed to Local ordinances)TREATED VAPOR ROUTED TOATMOSPHERE THROUGH STACK IN ROOFFIGURE51,500-gal Water Storage Tankwith float switches to shut downsystem during times of high-high waterEntrained water stored and transported to recylcer
FIGURE
6TYPICAL VP WELL
CONSTRUCTION
AS-BUILT DIAGRAM
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
NOT TO SCALE
1/4- inch diameter nylon tubing
6.0-inch bentonite seal (hydrated)
Well Box Set in Concrete;
set flush with surface in snowplough removal areas
Removable Cap
Bentonite grout
Filter Pack: 12 inches
Lonestar #2/12 Sand
(6 inches below screen,
6 inches above screen)
1.5-inch long soil gas screen
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
ALL 10 VP WELLS CONSTRUCTED SAME
Total VP Well Depth:
5 Feet
FIGURE7Phone: (661) 831-6906Fax: (661) 831-6234E C Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313LAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIANOT TO SCALEWATER SUPPLY WELL LOCATION PLOTTATA LANE WELLLTLWSITEJULIE WELLCLEMENT WELLLEGENDApproximate Location ofWater Supply WellTATA LANE WELLJULIE WELLCLEMENT WELLN
Project Number 1950BK49/27 Auaust 12. 2010
TABLES
Table 1 Summary of Current Groundwater Monitoring Data
Table 2 Summary of Historical Groundwater Elevation Data
Table 3 Summary of Historical Groundwater Analytical Data
Table 4 Summary of Historical VP Shallow Soil-Gas Analytical
Data
Table SA Summary of Well Construction Details
Table SB Summary of November 2009 Soil Analytical Data
Table SC Well Distance Matrix Chart
Table 6 Summary of Depths to Water During Pilot Testing
Table 7 Summary of SVE /GASS Remediation System Operational
Data
Table 8 Summary of VE W ellfield Data
Table 9 Summary of Historical SVE Vapor Laboratory Analytical
Data
Table 10 Comparison of Shallow Soil-Gas Data with ESLs
E2C Remediation Tables
Project Number: 1950BK49/27 August 12, 2010
TABLE7
SUMMARY OF SVE/GASS REMEDIATION SYSTEM OPERATIONAL DATA
Lake Tahoe Laundry Works
1024 Lake Tahoe Boulevard
South Lake Tahoe, California
Operational Cumulative Hour Cumulative Inlet System Well Field Field Field Lab Field voes Cumulative
Date Status Calendar Meter Operating Flow Vacuum Vacuum Oxygen Vapor Influent Vapor Influent Vapor Effluent Lbs./Hr. Lbs.
Monitored on Arrival Days Reading Hours (scfm) (in-Hg) (in-Hg) (%) (ppmV) (ppmV) (ppmV) Extracted Extracted
4/8/10 off 0 202.0 0 500 3.75 2.75 20.6 140 0.752 0 0.010 0.000
4/9/10 off 1 205.0 3.0 500 4.15 2.75 20.6 130 2.043 0 0.027 0.055 .. --·-
4/16/10 off 8 369.4 167.4 500 3.50 3.50 20.2 110 0 0.023 4.119 -. -4/29/10 off 21 678.9 476.9 500 3.70 3.70 20.1 80 0 0.016 10.18 .. ..
5/6/10 on 28 841.0 639.0 500 4.50 4.50 20.9 25 0 0.005 11.93 -.. •..
5/12/10 on 34 978.7 776.7 500 3.50 3.50 20.9 90 0 0.019 13.56 .. ..
6/1/10 off 54 1,462 1,260 500 3.70 3.70 20.9 90 0 0.019 22.53 _,, . . . ----···· ---·-
Notes: Average Extraction Rate (Lbs./Hr.) 0.017
--= Data not available I not recorded
in-Hg = Inches of Mercury
Lbs./Hr. = Pounds per hour
ppmv = Parts per million by volume
scfm = Standard cubic feet per minute
SVE/GASS = Soil Vapor Extraction I Groundwater Air Sparge Si
VOCs =Volatile Organic Compounds (primarily tetrachloroethylene and trichloroethylene)
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)
Table 7~1
E 2 C Remediation
Project Number: 1950BK49/27August 12, 2010E2C RemediationGraph-1LAKE TAHOE LAUNDRY WORKSHYDROGRAPH6,170.006,172.006,174.006,176.006,178.006,180.006,182.006,184.006,186.006,188.006,190.00Aug-08Oct-08Dec-08Feb-09Apr-09Jun-09Aug-09Oct-09Dec-09Feb-10Date MonitoredGW Elevation (feet MSL)LW-MW-1SLW-MW-2SLW-MW-5SLW-MW-9SLW-MW-10SLW-MW-11SLW-MW-12SLW-MW-13SPILOT TESTPERIOD
Project Number 1950BK49/27 August 12, 2010
E2C Remediation Appendices
APPENDICES
Appendix A CEDEMD, City & EDCAQMD Permits
Appendix B Offsite Well LW-MW-12S Access Agreement
Appendix C Offsite Well OS-1 CALTRANS Encroachment Permit
Appendix D Site SZA Well Boring Logs
Appendix E Offsite Well OS-1 Boring Log
Appendix F Monitoring Well As-Built Diagrams
Appendix G SVE Well As-Built Diagrams
Appendix H AS Well As-Built Diagrams
Appendix I VP Well Logs
Appendix J Morrow Surveying Plot
Appendix K Monitoring Well Development Purge Sheets
Appendix L Purge & Development Water Transport Manifest and
Recycling Certification & Soil and Installation Waste
Disposal Documentation
Appendix M Erosion and Sediment Control Plan
Appendix N PES Site Plots of Soil and Groundwater Analytical
Results
Appendix O 2008 Cross-Sections
Appendix P 2008 Groundwater Gradient Plots
Appendix Q Summary of 2008 Soil Analytical Data
Appendix R 2008 Soil Chemical Cross-Sections
Appendix S Soil-Gas Monitoring Methods and Procedures
Appendix T Pilot Test Field Data
Appendix U Summary Tables of Pilot Test Data
Appendix V Pilot Test Vacuum Isocontour Plots
Appendix W Remediation System Vapor Sample Analytical Reports
Appendix X VP Well Purge Data Sheets
Appendix Y VP Well Analytical Laboratory Reports
Appendix Z 2009-10 Soil Analytical Laboratory Reports
Appendix AA Vapor Intrusion Tier-2 Human Health-Risk
Assessment
FIGURE
F-1GROUNDWATER MONITORING WELL
LW-MW-9S AS-BUILT DIAGRAM
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
15 ft
Lonestar #2/12 Sand Pack 21 Feet Above Screened Interval)
3.0 feet of Hydrated Bentonite Pellets
NOT TO SCALEFlush Thread Cap
25 ft
Grout
Set in Concrete
2.0”-Dia. Sch. 40 PVC Screen Casing (0.020” slots)
2.0”-dia. Sch. 40 PVC Blank Casing
1.0 ft
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Note: Well head installed with a traffic-rated,
flush-mount cover
4ft
2.0 ft
3.0 ft
FIGURE
F-2GROUNDWATER MONITORING WELL
LW-MW-10S AS-BUILT DIAGRAM
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
15 ft
3.0 feet of Hydrated Bentonite Pellets
NOT TO SCALEFlush Thread Cap
25 ft
Grout
Set in Concrete
2.0”-Dia. Sch. 40 PVC Screen Casing (0.020” slots)
2.0”-dia. Sch. 40 PVC Blank Casing
1.0 ft
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Note: Well head installed with a traffic-rated,
flush-mount cover
4ft
2.0 ft
3.0 ft
Lonestar #2/12 Sand Pack 21 Feet Above Screened Interval)
FIGURE
F-3GROUNDWATER MONITORING WELL
LW-MW-11S AS-BUILT DIAGRAM
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
15 ft
3.0 feet of Hydrated Bentonite Pellets
NOT TO SCALEFlush Thread Cap
25 ft
Grout
Set in Concrete
2.0”-Dia. Sch. 40 PVC Screen Casing (0.020” slots)
2.0”-dia. Sch. 40 PVC Blank Casing
1.0 ft
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Note: Well head installed with a traffic-rated,
flush-mount cover
4ft
2.0 ft
3.0 ft
Lonestar #2/12 Sand Pack 21 Feet Above Screened Interval)
FIGURE
F-4GROUNDWATER MONITORING WELL
LW-MW-12S AS-BUILT DIAGRAM
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
15 ft
3.0 feet of Hydrated Bentonite Pellets
NOT TO SCALEFlush Thread Cap
25 ft
Grout
Set in Concrete
2.0”-Dia. Sch. 40 PVC Screen Casing (0.020” slots)
2.0”-dia. Sch. 40 PVC Blank Casing
1.0 ft
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Note: Well head installed with a traffic-rated,
flush-mount cover
4ft
2.0 ft
3.0 ft
Lonestar #2/12 Sand Pack 21 Feet Above Screened Interval)
FIGURE
F-5GROUNDWATER MONITORING WELL
LW-MW-13S AS-BUILT DIAGRAM
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
15 ft
3.0 feet of Hydrated Bentonite Pellets
NOT TO SCALEFlush Thread Cap
25 ft
Grout
Set in Concrete
2.0”-Dia. Sch. 40 PVC Screen Casing (0.020” slots)
2.0”-dia. Sch. 40 PVC Blank Casing
1.0 ft
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Note: Well head installed with a traffic-rated,
flush-mount cover
4ft
2.0 ft
3.0 ft
Lonestar #2/12 Sand Pack 21 Feet Above Screened Interval)
FIGURE
F-6GROUNDWATER MONITORING WELL
OS-1 AS-BUILT DIAGRAM
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
15 ft
Lonestar #3 Sand Pack (1 Foot Above Screened Interval)
3.0 feet of Hydrated Bentonite Pellets
NOT TO SCALEFlush Thread Cap
25 ft
Grout
Set in Concrete
2.0”-Dia. Sch. 40 PVC Screen Casing (0.020” slots)
2.0”-dia. Sch. 40 PVC Blank Casing
1.0 ft
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Note: Well head installed with a traffic-rated,
flush-mount cover
4ft
2.0 ft
3.0 ft
VES-1/VED-1
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
13 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soils; compacted under driveways
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-1
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Air Flow to Manifold
VES-2/VED-2
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
14 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-2
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
2.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-3/VED-3
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
14 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-3
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
2.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-4/VED-4
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
13 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-4
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-5/VED-5
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
13.4 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-5
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1.9 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-6/VED-6
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12.5 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-6
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
5.5 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-7/VED-7
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-7
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1 foot
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
5.5 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-8/VED-8
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-8
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1 foot
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
5.5 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-9/VED-9
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-9
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1 foot
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
5.5 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-10/VED-10
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-10
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1 foot
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
5.5 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-11/VED-11
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-11
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1 foot
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
5.5 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-12/VED-12
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
11.5 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-12
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
4.5 feet
4 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-13/VED-13
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
13.5 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-13
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
2 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-14/VED-14
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12.5 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-14
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
2 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
5.5 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-15/VED-15
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soil backfill
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-15
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
2 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
5 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Air Flow to Manifold
Native soilsNative soils
VES-16/VED-16
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soils; compacted under driveways
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-16
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1 foot
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Air Flow to Manifold
VES-17/VED-17
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
13 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soils; compacted under driveways
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-17
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Air Flow to Manifold
VES-18/VED-18
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
13 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soils; compacted under driveways
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-18
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
1.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Air Flow to Manifold
VES-19/VED-19
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soils; compacted under driveways
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-19
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
0.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Air Flow to Manifold
VES-20/VED-20
AS-BUILT DIAGRAM
NOT TO SCALE
Lonestar #3 Sand, or Equivalent
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
12 feet
2 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Native soils; compacted under driveways
Air Flow to Manifold
Removable Caps
Hydrated Bentonite Pellets
3 feet
Hydrated Bentonite Pellets
10.0-inch ID Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
G-20
1.5 feet
Note: Well head installed underground
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow To Manifold
0.5 feet
Lonestar #3 Sand, or EquivalentAir Flow To Manifold
1.0 foot
Flush Threaded 2-inch ID Schedule 40 PVC Blank Riser
6 feet
5 feet of 2-Inch ID Schedule 40 PVC, 0.020-Inch slot
size vapor extraction screen
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Air Flow to Manifold
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
25 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 15 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
12.5 feet
6 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-1AS-1
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
25 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 15 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
12.5 feet
6 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-2AS-2
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
28 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
8 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-3AS-3
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
26 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 16 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
12.5 feet
7 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-4AS-4
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
26 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 16 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
12.5 feet
7 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-5AS-5
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
12.5 feet
11 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-6AS-6
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
Lonestar #2/12 Sand
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
28.5 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
8.5 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-7AS-7
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
Lonestar #2/12 Sand
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
27 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
7 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-8AS-8
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
Lonestar #2/12 Sand
NOT TO SCALE
Medium Aquarium Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
28.5 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
8.5 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-9AS-9
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
27 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 16 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
12.5 feet
8 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-10AS-10
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
12.5 feet
9 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-11AS-11
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
27.5 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
7 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-12AS-12
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
29 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
9 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-13AS-13
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-14AS-14
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-15AS-15
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
Medium Aquarium Sand
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-16AS-16
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
Medium Aquarium Sand
NOT TO SCALE
Medium Aquarium Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-17AS-17
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-18AS-18
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
Medium Aquarium Sand
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-19AS-19
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-20AS-20
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
Medium Aquarium Sand
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-21AS-21
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
Medium Aquarium Sand
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-22AS-22
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
Medium Aquarium Sand
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-23AS-23
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-24AS-24
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
Medium Aquarium Sand
NOT TO SCALE
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
30 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 18 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
10 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-25AS-25
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Native soils; compacted under driveways
Native soilsNative soils
Medium Aquarium Sand
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
27 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 16 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
7 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-26AS-26
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
NOT TO SCALE
Lonestar #2/12 Sand
Flush Threaded 2.0-inch I.D.
Schedule 40 PVC Riser
26 feet
1.5 feet
Micro-Porous
Air Sparge Point
Approximately 15 feet bgs
WATER
TABLE
Air Flow From Manifold
Neat-Cement Grout
3.5 feet
Bentonite Pellets
13.5 feet
6 feet
1.5 feet
8.0-inch O.D Boring
Phone: (661) 831-6906
Fax: (661) 831-6234
E C Remediation2
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
FIGURE
H-27AS-27
AS-BUILT DIAGRAM
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIAAir Flow From Manifold
Removable Cap
Note: Well head installed underground
Asphalt patch
Existing Asphalt Surface Existing Asphalt Surface
Native soils; compacted under driveways
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
TRANSIT
STATIONStorm Drain Inlet
Storm Drain Inlet
Storm Drain Runoff
Catch Basin
Storm Drain Inlet
STORM DRAIN
CLARIFIER UNIT
N
0FT 50
F
T
FIGURE
1EROSION AND SEDIMENT
CONTROL PLOT
Wood
R
e
t
a
i
n
i
n
g
W
a
l
l
3-foot wide trench lines in
landscape areas (covered
with wood chips) (to be
capped with geofabric)
Wattles: Were placed inside curbing and
anchored to dirt and marked with snow poles
Backflow Preventer
Area
3-foot wide trench line
(backfilled and compacted
to subgrade and capped
with asphalt)
18” WIDE TRENCH LINES
(backfilled and compacted to subgrade
then capped with asphalt)
18” wide trench lines
(backfilled to subgrade
and capped with compacted
asphalt)
6-foot wide trench line
(backfilled with compaction
and capped with compacted asphalt)
NOTE: ASPHALT WAS PLACED AND COMPACTED
IN TRENCH LINES ACROSS ASPHALT AREAS ON 11/24/09
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
L A K E T A H B O
A R
O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA
FIGURE
2BSITE PLAN WITH
CROSS-SECTION TRANSECTS
0 FT F50 T
N
LEGEND
On-Site Dual-Zone Groundwater
Monitoring Well Set
Off-Site Dual-Zone Temporary
Groundwater Monitoring Well Set
LW-MW-1S/1D
LW-MW-3S/3D
MW-38M
MW-45M
LW-MW-3S
LW--MW3D
LW-MW-1S
LW-MW-1D
LW-MW-5S
LW-MW-5D
LW-MW-7S
LW-MW-7D
LW-MW-6S
LW-MW-6D
LW-MW-4S
LW-MW-4D
LW-MW-2S
LW-MW-2D
LW-MW-8S
LW-MW-8D
A
A ’BB’C ’C
D’
D
Phone: (661) 831-6906Fax: (661) 831-6234EC Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313CROSS SECTION A - A’FIGURE4LAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIAMLSP/SW1SP/SW1SP/SW3SP/SW2SP/SW3SP/SW4SP/SW2SP/SW3SP/SW2SP/SW3Horizontal Scale: 1.0-inch = 20 feet020 FTHorizontal ScaleVertical Scale: 1.0-inch = 20 feet020 FTVertical ScaleLegendFirst Encountered Shallow WaterML - Silt; light gray and orange brown with Fe-staining in placesSP/SW1 -SM - Silty Sand; reddish gray; generally very fine sands; non-plastic finesSP - Poorly-Graded SandSW - Well-Graded SandShallow Water Table w/date measuredAlternating lenses of poorly-graded and well-graded sands;generally salt & pepper in color with occasional moderateyellow brown lensesSP/SW2 -Alternating lenses of poorly-graded and well-graded sands;generally salt & pepper lenses with interbedded moderateyellow brown and gray lensesSP/SW3 -Alternating lenses of poorly-graded and well-graded sands;salt and pepper, moderate yellow brown and graySP/SW3MLMLAA’02040EASTWEST601030500204060103050LW-8D/8SW-MLW-8D/8SW-MLW -6 S-MW D/6t ae ’)(se h ad 15LW-6 S-MWD/6t a e ’)(se h ad 15LW-MW-5D/5S(s t back 10’)eLW-MW-5D/5S(s t back 10’)eW3L-MW-3D/ Sbc4(set ak 5’)W3L -MW-3D/Sbc 4(set a k 5’)WW-/2L-M2DS b 5)(set ack 3 ’WW-/2L-M 2DS b 5)(set ack3’W/LW-M-1D 1SW/LW-M -1D1S8/1/087/29/088/1/087/24/087/30/088/4/087/28/087/11/087/15/087/17/08MLFILLFILLFILLFILLFILLFILLMLSM?????????????SP/SW2SP/SW1SP/SW2SP/SW1SP/SW1??SP/SW2SP/SW1SP/SW3SP/SW4 -Alternating lenses of poorly-graded and well-graded sands;interbedded lenses of gray and orange-brown withoccasional Fe-staining; occasional lenses of reddish brown,very fine sandSP/SW3SP/SW3ML??9/9/089/9/08 (SZA)9/9/08 (SZA)9/9/08 (SZA)9/9/08 (SZA)9/9/08 (SZA)9/9/08 (MZA)9/9/08 (MZA)9/9/08 (MZA)9/9/08 (MZA)9/9/08 (MZA)9/9/08 (MZA)?ML
E C Remediation2 FIGURE
5Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Drive, Ste. 105
Bakersfield, California 93313
CROSS SECTION B - B’
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
B’B’
00
4040
6060
1010
3030
5050
?
?
2020
Legend
First Encountered Shallow Water
ML - Silt; light gray and orange brown with Fe-staining in places
SP/SW1 -
SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines
SP - Poorly-Graded Sand
SW - Well-Graded Sand
Shallow Water Table w/date measured
Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper in color with occasional moderate
yellow brown lenses
SP/SW2 -Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper lenses with interbedded moderate
yellow brown and gray lenses
SP/SW3 -
Alternating lenses of poorly-graded and well-graded sands;
salt and pepper, moderate yellow brown and gray
SP/SW4 -
Alternating lenses of poorly-graded and well-graded sands;
interbedded lenses of gray and orange-brown with
occasional Fe-staining; occasional lenses of reddish brown,
very fine sand
BB
00
2020
4040
6060
1010
3030
5050
W /
LW-M -1D 1SW/
LW-M -1D 1S
7/15/08
FILLFILL
ML
SM ?
?
?
?
?
?
??
SP/SW2
SP/SW3
SP/SW1SP/SW1
SP/SW3
SP/SW4
LW-MW-2D/2 S
b 2
(set ack 1 ’)
LW-MW-2D/2 S
b 2
(set ack 1 ’)
7/17/08
?
SP/SW2
SP/SW3
ML
LW-MW-3D/3S
LW-MW-3D/3S
8/1/08
7/29/08
W-W /4
L M -4 D S
(s e ah ad 7 ’
t e )W-W /4
L M -4 D S
(s e ah ad 7 ’
t e )NORTHSOUTH
7/31/08
ML
SP/SW3
SP/SW2SP/SW2 SP/SW2
ML
ML
?
?
??
SP/SW3
SP/SW1
ML
SM
?
SP/SW1 SP/SW1
SP/SW3
FILL FILL
ML
?
?ML
Phone: (661) 831-6906Fax: (661) 831-6234EC Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313CROSS SECTION C - C’FIGURE6LAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIAMLSP/SW3SP/SW2SP/SW2SP/SW3SP/SW3Horizontal Scale: 1.0-inch = 20 feet020 FTHorizontal ScaleVertical Scale: 1.0-inch = 20 feet020 FTVertical ScaleLegendFirst Encountered Shallow WaterML - Silt; light gray and orange brown with Fe-staining in placesSP/SW1 -SM - Silty Sand; reddish gray; generally very fine sands; non-plastic finesSP - Poorly-Graded SandSW - Well-Graded SandShallow Water Table w/date measuredAlternating lenses of poorly-graded and well-graded sands;generally salt & pepper in color with occasional moderateyellow brown lensesSP/SW2 -Alternating lenses of poorly-graded and well-graded sands;generally salt & pepper lenses with interbedded moderateyellow brown and gray lensesSP/SW3 -Alternating lenses of poorly-graded and well-graded sands;salt and pepper, moderate yellow brown and graySP/SW3MLMLC’02040EASTWEST601030500204060103050LW-MW-8D/8Sb(set ack 10’)LW-MW-8D/8Sb(set ack 10’)LW -6 S-MW D/6t ae ’)(se h ad 20LW-6 S-MW D/6t a e ’)(se h ad 20W5L -MW-5D/ St e5(se ah ad 1’)W5L-MW-5D/ St e 5(se ah ad 1’)W-MW-3D/3SLW-MW-3D/3SLW-L-MW2D/2Ste(se ahad 25’)W-L-MW2D/2Ste(se ah ad 25’)8/1/087/29/088/1/087/24/087/30/088/4/087/28/087/17/08FILLFILLFILL?????SP/SW1SP/SW2SP/SW1SP/SW1?SP/SW4 -Alternating lenses of poorly-graded and well-graded sands;interbedded lenses of gray and orange-brown withoccasional Fe-staining; occasional lenses of reddish brown,very fine sandSP/SW3ML?W- W /4LM-4D St bck 2)(se a5’W- W /4LM-4D St b ck 2 )(se a 5’7/31/08MLSP/SW3SP/SW2MLSP/SW1SP/SW3INTERSECT B-B’INTERSECT B-B’INTERSECT A-A’INTERSECT A-A’SP/SW2SP/SW2MLSP/SW3ML????????SP/SW1SP/SW1SP/SW2?ML??SP/SW1?FILLFILLFILLFILL?C
E C Remediation2 FIGURE
7Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Drive, Ste. 105
Bakersfield, California 93313
CROSS SECTION D - D’
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
B’B’
00
4040
6060
1010
3030
5050
2020
Legend
First Encountered Shallow Water
ML - Silt; light gray and orange brown with Fe-staining in places
SP/SW1 -
SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines
SP - Poorly-Graded Sand
SW - Well-Graded Sand
Shallow Water Table w/date measured
Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper in color with occasional moderate
yellow brown lenses
SP/SW2 -Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper lenses with interbedded moderate
yellow brown and gray lenses
SP/SW3 -
Alternating lenses of poorly-graded and well-graded sands;
salt and pepper, moderate yellow brown and gray
SP/SW4 -
Alternating lenses of poorly-graded and well-graded sands;
interbedded lenses of gray and orange-brown with
occasional Fe-staining; occasional lenses of reddish brown,
very fine sand
BB
00
2020
4040
6060
1010
3030
5050
EASTWEST
?
?
?
W-MW-4D/4S
L et a ea d107 ’)
(s hW-MW-4D/4S
L et a ea d107 ’)
(s h
7/31/08
ML
SP/SW3
SP/SW2
ML
?
?
SP/SW1
SP/SW3
FILL
5
LW-MW-5D/S
e 5
(set ah ad 2 ’)5
LW-MW-5D/S
e 5
(set ah ad 2 ’)
8/1/08
7/24/08
ML
SP/SW3
SP/SW3
MLML
S
LW-MW-6 D /6
s a(et b ck 13’)S
LW-MW-6 D /6
s a(et b ck 13’)
8/4/08
FILL
SP/SW3
?
SP/SW3
?
SP/SW2SP/SW2
ML
SP/SW1
?
SP/SW1 SP/SW1
SP/SW2
?
?
?
?
FILL FILL
INTERSECT C-C’INTERSECT C-C’
INTERSECT B-B’INTERSECT B-B’
INTERSECT A-A’INTERSECT A-A’
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
L A K E T A H B O
A R
O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA
FIGURE
3AGROUNDWATER GRADIENT PLOT
SHALLOW ZONE
9/9/08
0 FT F50 T
N
LEGEND
On-Site Dual-Zone Groundwater
Monitoring Well Set
Off-Site Dual-Zone Temporary
Groundwater Monitoring Well Set
LW-MW-1S/1D
LW-MW-3S/3D
MW-45M
MW-38M
LW-MW-3S
LW-MW-1S
LW-MW-5S
LW-MW-7S
LW-MW-6S
LW-MW-4S
LW-MW-2S
LW-MW-8S
6255.17
6253.72
6253.59
6254.57
6252.74
6254.94
6255.13 6254.41
2564
62 53 ???2565
???????
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
L A K E T A H B O
A R
O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA
FIGURE
3AAGROUNDWATER GRADIENT PLOT
SHALLOW ZONE
9/14/08
0 FT F50 T
N
LEGEND
On-Site Dual-Zone Groundwater
Monitoring Well Set
Off-Site Dual-Zone Temporary
Groundwater Monitoring Well Set
LW-MW-1S/1D
LW-MW-3S/3D
MW-38M
MW-45M
LW-MW-3S
LW-MW-1S
LW-MW-5S
LW-MW-7S
LW-MW-6S
LW-MW-4S
LW-MW-2S
LW-MW-8S
6255.01
6253.52
6253.36
6254.39
6252.70
6255.03
6254.73 6254.18
2564
6 2 5 3 ?
6255
?????????
Project Number 1950BK43September 22, 2008PCE TCE VC CA 1,1-DCETrans-1,2-DCE1,1-DCACis-1,2-DCE1,2-DCA 1,1,1-TCALW-MW-1-7(FB)410 17<.05 <.5 <.05 <.05 <.051.2<.05 <.05LW-MW-1-7(PV)532 13.9<0..050 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050LW-MW-1-26(FB)0.26<.03 <.05 <.5 <.05 <.05 <.05 <.05 <.05 <.05LW-MW-1-26(PV)0.132<0.100 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050LW-MW-1-38(FB)0.33<.03 <.05 <.5 <.05 <.05 <.05 <.05 <.05 <.05LW-MW-1-38(PV)0.27<0.100 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050LW-MW-1-52.5(PV) 7/14/08 52.5 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-2-10(FB)0.33 0.035<.05 <.5 <.05 <.05 <.05 <.05 <.05 <.05LW-MW-2-10(PV)0.266<0.100 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050 <0..050LW-MW-2-16(FB)0.12<.03 <.05 <.5 <.05 <.05 <.05 <.05 <.05 <.05LW-MW-2-16(PV)0.086<0.100 <0..050 <0..050 <0..0500.126<0..050 <0..050 <0..050 <0..050LW-MW-2-31(FB)0.14<.03 <.05 <.5 <.05 <.05 <.05 <.05 <.05 <.05LW-MW-2-31(PV)0.112<0.100 <0..050 <0..050 <0..0500.125<0..050 <0..050 <0..050 <0..050LW-MW-2-43(PV) 7/24/08 43.0 <0.05 <0.1 <0.05 <0.05 <0.05 0.125 <0.05 <0.5 <0.05 <0.05LW-MW-3-11 7/29/08 11.0 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-3-20 7/29/08 20.0 <0.05 <0.1 <0.05 <0.05 <0.050.123<0.05 <0.50.19<0.05LW-MW-3-25 7/29/08 25.0 <0.05 <0.1 0.053 <0.05 <0.05 <0.05 <0.050.71<0.05 <0.05LW-MW-3-34 7/30/08 34.0 <0.05 <0.1 <0.05 <0.05 <0.050.12<0.05 <0.5 <0.05 <0.05LW-MW-4-5.5 7/31/08 5.5 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-4-15 7/31/08 15.0 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-4-36.5 8/6/08 36.5 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-4-45.5 8/6/08 45.50.713<0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-5-10 7/24/08 10.0 <0.05 <0.1 <0.05 <0.05 <0.050.108<0.050.51<0.05 <0.05LW-MW-5-30 7/24/08 30.0 <0.05 ` 0.059 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-5-41 7/24/08 41.0 <0.05 <0.1 <0.05 <0.05 <0.050.107<0.05 <0.5 <0.05 <0.05LW-MW-5-50 7/24/08 50.0 <0.05 <0.1 <0.05 <0.05 <0.050.12<0.05 <0.5 <0.05 <0.05South Lake Tahoe, California(mg/Kg)Friedman & Bruya and ProVera ResultsSampleDateSampleDepth(bgs)Sample NameTABLE 2 SUMMARY OF SITE INVESTIGATION SOIL ANALYTICAL DATALAKE TAHOE LAUNDRY WORKS1024 Lake Tahoe BoulevardProVera Results7/17/08 10.07/17/08 16.07/24/08 31.07.038.026.07/11/087/11/087/14/08E2C RemediationTable 2-1
Project Number 1950BK43September 22, 2008PCE TCE VC CA 1,1-DCETrans-1,2-DCE1,1-DCACis-1,2-DCE1,2-DCA 1,1,1-TCASouth Lake Tahoe, California(mg/Kg)Friedman & Bruya and ProVera ResultsSampleDateSampleDepth(bgs)Sample NameTABLE 2 SUMMARY OF SITE INVESTIGATION SOIL ANALYTICAL DATALAKE TAHOE LAUNDRY WORKS1024 Lake Tahoe BoulevardLW-MW-6-10 8/4/08 10.0 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-6-20 8/6/08 20.00.272<0.1 <0.05 <0.05 <0.050.109<0.05 <0.5 <0.05 <0.05LW-MW-6-30 8/6/08 30.00.106<0.1 <0.05 <0.05 <0.050.122<0.05 <0.5 <0.05 <0.05LW-MW-6-45 8/7/08 45.0 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-7-11 7/31/08 11.000.069<0.10.061<0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-7-20 7/31/08 20.00 <0.05 <0.1 <0.05 <0.05 <0.050.113<0.05 <0.5 <0.05 <0.05LW-MW-7-25 7/31/08 25.00 <0.05 <0.1 <0.05 <0.05 <0.050.118<0.05 <0.5 <0.05 <0.05LW-MW-7-40.5 8/5/08 40.500.82<0.10.066<0.05 <0.050.141<0.05 <0.5 <0.05 <0.05LW-MW-8-15 7/28/08 15.00 <0.05 <0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05LW-MW-8-25.5 7/28/08 25.50 <0.05 <0.1 <0.05 <0.05 <0.050.105<0.05 <0.5 <0.05 <0.05LW-MW-8-32 7/29/08 32.000.057<0.1 <0.05 <0.05 <0.050.11<0.05 <0.5 <0.05 <0.05LW-MW-8-40 7/29/08 40.000.375<0.1 <0.05 <0.05 <0.05 <0.05 <0.05 <0.5 <0.05 <0.05Notes:bgs = Below Ground SurfaceFB = Friedman & Bruya, Inc.nd<0.05 = not detected at or above the stated laboratory reporting limit.PV = ProVera Analytical Laboratories, Inc.E2C RemediationTable 2-2
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
L A K E T A H B O
A R
O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA
FIGURE
2BSITE PLAN WITH
CROSS-SECTION TRANSECTS
0 FT F50 T
N
LEGEND
On-Site Dual-Zone Groundwater
Monitoring Well Set
Off-Site Dual-Zone Temporary
Groundwater Monitoring Well Set
LW-MW-1S/1D
LW-MW-3S/3D
MW-38M
MW-45M
LW-MW-3S
LW--MW3D
LW-MW-1S
LW-MW-1D
LW-MW-5S
LW-MW-5D
LW-MW-7S
LW-MW-7D
LW-MW-6S
LW-MW-6D
LW-MW-4S
LW-MW-4D
LW-MW-2S
LW-MW-2D
LW-MW-8S
LW-MW-8D
A
A ’BB’C ’C
D’
D
Phone: (661) 831-6906Fax: (661) 831-6234EC Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313CROSS SECTION A - A’SOIL PCEFIGURE4ALAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIAMLSP/SW1SP/SW1SP/SW3SP/SW2SP/SW3SP/SW4SP/SW2SP/SW3SP/SW2SP/SW3Horizontal Scale: 1.0-inch = 20 feet020 FTHorizontal ScaleVertical Scale: 1.0-inch = 20 feet020 FTVertical ScaleLegendFirst Encountered Shallow WaterML - Silt; light gray and orange brown with Fe-staining in placesSP/SW1 -SM - Silty Sand; reddish gray; generally very fine sands; non-plastic finesSP - Poorly-Graded SandSW - Well-Graded SandShallow Water Table w/date measuredAlternating lenses of poorly-graded and well-graded sands;generally salt & pepper in color with occasional moderateyellow brown lensesSP/SW2 -Alternating lenses of poorly-graded and well-graded sands;generally salt & pepper lenses with interbedded moderateyellow brown and gray lensesSP/SW3 -Alternating lenses of poorly-graded and well-graded sands;salt and pepper, moderate yellow brown and graySP/SW3MLMLAA’02040EASTWEST601030500204060103050LW-8D/8SW-MLW-8D/8SW-MLW -6 S-MW D/6t ae ’)(se h ad 15LW-6 S-MWD/6t a e ’)(se h ad 15LW-MW-5D/5S(s t back 10’)eLW-MW-5D/5S(s t back 10’)eW3L-MW-3D/ Sbc4(set ak 5’)W3L -MW-3D/Sbc 4(set a k 5’)WW-/2L-M2DS b 5)(set ack 3 ’WW-/2L-M 2DS b 5)(set ack3’W/LW-M-1D 1SW/LW-M -1D1S7/15/087/17/08MLFILLFILLFILLFILLFILLFILLMLSM?????????????SP/SW2SP/SW1SP/SW2SP/SW1SP/SW1??SP/SW2SP/SW1SP/SW3SP/SW4 -Alternating lenses of poorly-graded and well-graded sands;interbedded lenses of gray and orange-brown withoccasional Fe-staining; occasional lenses of reddish brown,very fine sandSP/SW3SP/SW3ML??4100.260.33NDNDNDNDNDND0.330.120.14NDNDNDNDNDND0.2720.106ND0.0570.375Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2)NDML?????
Phone: (661) 831-6906Fax: (661) 831-6234EC Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313CROSS SECTION A - A’SOIL TCEFIGURE4BLAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIAMLSP/SW1SP/SW1SP/SW3SP/SW2SP/SW3SP/SW4SP/SW2SP/SW3SP/SW2SP/SW3Horizontal Scale: 1.0-inch = 20 feet020 FTHorizontal ScaleVertical Scale: 1.0-inch = 20 feet020 FTVertical ScaleLegendFirst Encountered Shallow WaterML - Silt; light gray and orange brown with Fe-staining in placesSP/SW1 -SM - Silty Sand; reddish gray; generally very fine sands; non-plastic finesSP - Poorly-Graded SandSW - Well-Graded SandShallow Water Table w/date measuredAlternating lenses of poorly-graded and well-graded sands;generally salt & pepper in color with occasional moderateyellow brown lensesSP/SW2 -Alternating lenses of poorly-graded and well-graded sands;generally salt & pepper lenses with interbedded moderateyellow brown and gray lensesSP/SW3 -Alternating lenses of poorly-graded and well-graded sands;salt and pepper, moderate yellow brown and graySP/SW3MLMLAA’02040EASTWEST601030500204060103050LW-8D/8SW-MLW-8D/8SW-MLW -6 S-MW D/6t ae ’)(se h ad 15LW-6 S-MWD/6t a e ’)(se h ad 15LW-MW-5D/5S(s t back 10’)eLW-MW-5D/5S(s t back 10’)eW3L-MW-3D/ Sbc4(set ak 5’)W3L -MW-3D/Sbc 4(set a k 5’)WW-/2L-M2DS b 5)(set ack 3 ’WW-/2L-M 2DS b 5)(set ack3’W/LW-M-1D 1SW/LW-M -1D1SMLFILLFILLFILLFILLFILLFILLMLSM?????????????SP/SW2SP/SW1SP/SW2SP/SW1SP/SW1??SP/SW2SP/SW1SP/SW3SP/SW4 -Alternating lenses of poorly-graded and well-graded sands;interbedded lenses of gray and orange-brown withoccasional Fe-staining; occasional lenses of reddish brown,very fine sandSP/SW3SP/SW3ML??17NDNDNDNDNDNDNDND0.35NDNDNDNDNDNDNDNDNDNDNDNDAnalytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2)NDNDML?
Phone: (661) 831-6906Fax: (661) 831-6234EC Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313CROSS SECTION A - A’SOIL cis-1,2-DCEFIGURE4CLAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIAMLSP/SW1SP/SW1SP/SW3SP/SW2SP/SW3SP/SW4SP/SW2SP/SW3SP/SW2SP/SW3Horizontal Scale: 1.0-inch = 20 feet020 FTHorizontal ScaleVertical Scale: 1.0-inch = 20 feet020 FTVertical ScaleLegendFirst Encountered Shallow WaterML - Silt; light gray and orange brown with Fe-staining in placesSP/SW1 -SM - Silty Sand; reddish gray; generally very fine sands; non-plastic finesSP - Poorly-Graded SandSW - Well-Graded SandShallow Water Table w/date measuredAlternating lenses of poorly-graded and well-graded sands;generally salt & pepper in color with occasional moderateyellow brown lensesSP/SW2 -Alternating lenses of poorly-graded and well-graded sands;generally salt & pepper lenses with interbedded moderateyellow brown and gray lensesSP/SW3 -Alternating lenses of poorly-graded and well-graded sands;salt and pepper, moderate yellow brown and graySP/SW3MLMLAA’02040EASTWEST601030500204060103050LW-8D/8SW-MLW-8D/8SW-MLW -6 S-MW D/6t ae ’)(se h ad 15LW-6 S-MWD/6t a e ’)(se h ad 15LW-MW-5D/5S(s t back 10’)eLW-MW-5D/5S(s t back 10’)eW3L-MW-3D/ Sbc4(set ak 5’)W3L -MW-3D/Sbc 4(set a k 5’)WW-/2L-M2DS b 5)(set ack 3 ’WW-/2L-M 2DS b 5)(set ack3’W/LW-M-1D 1SW/LW-M -1D1SMLFILLFILLFILLFILLFILLFILLMLSM?????????????SP/SW2SP/SW1SP/SW2SP/SW1SP/SW1??SP/SW2SP/SW1SP/SW3SP/SW4 -Alternating lenses of poorly-graded and well-graded sands;interbedded lenses of gray and orange-brown withoccasional Fe-staining; occasional lenses of reddish brown,very fine sandSP/SW3SP/SW3ML??1.2NDNDNDNDNDND0.71NDNDNDND0.51NDNDNDNDNDNDNDNDNDNDAnalytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2)ML?
E C Remediation2 FIGURE
5APhone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Drive, Ste. 105
Bakersfield, California 93313
CROSS SECTION B - B’
SOIL PCE
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
B’B’
00
4040
6060
1010
3030
5050
?
?
2020
Legend
First Encountered Shallow Water
ML - Silt; light gray and orange brown with Fe-staining in places
SP/SW1 -
SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines
SP - Poorly-Graded Sand
SW - Well-Graded Sand
Shallow Water Table w/date measured
Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper in color with occasional moderate
yellow brown lenses
SP/SW2 -Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper lenses with interbedded moderate
yellow brown and gray lenses
SP/SW3 -
Alternating lenses of poorly-graded and well-graded sands;
salt and pepper, moderate yellow brown and gray
SP/SW4 -
Alternating lenses of poorly-graded and well-graded sands;
interbedded lenses of gray and orange-brown with
occasional Fe-staining; occasional lenses of reddish brown,
very fine sand
BB
00
2020
4040
6060
1010
3030
5050
W /
LW-M -1D 1SW/
LW-M -1D 1S
FILLFILL
ML
SM ?
?
?
?
?
?
??
SP/SW2
SP/SW3
SP/SW1SP/SW1
SP/SW3
SP/SW4
LW-MW-2D/2 S
b 2
(set ack 1 ’)
LW-MW-2D/2 S
b 2
(set ack 1 ’)
?
SP/SW2
SP/SW3
ML
LW-MW-3D/3S
LW-MW-3D/3S W-W /4
L M -4 D S
(s e ah ad 7 ’
t e )W-W /4
L M -4 D S
(s e ah ad 7 ’
t e )NORTHSOUTH
ML
SP/SW3
SP/SW2SP/SW2 SP/SW2
ML
ML
?
?
??
SP/SW3
SP/SW1
ML
SM
?
SP/SW1 SP/SW1
SP/SW3
FILL FILL
ML
?
ND
0.33
0.12
0.14
410
0.26
0.33
ND
ND
ND
ND
ND
ND
ND
ND
0.713
?ML?ML
E C Remediation2 FIGURE
5BPhone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Drive, Ste. 105
Bakersfield, California 93313
CROSS SECTION B - B’
SOIL TCE
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
B’B’
00
4040
6060
1010
3030
5050
?
?
2020
Legend
First Encountered Shallow Water
ML - Silt; light gray and orange brown with Fe-staining in places
SP/SW1 -
SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines
SP - Poorly-Graded Sand
SW - Well-Graded Sand
Shallow Water Table w/date measured
Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper in color with occasional moderate
yellow brown lenses
SP/SW2 -Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper lenses with interbedded moderate
yellow brown and gray lenses
SP/SW3 -
Alternating lenses of poorly-graded and well-graded sands;
salt and pepper, moderate yellow brown and gray
SP/SW4 -
Alternating lenses of poorly-graded and well-graded sands;
interbedded lenses of gray and orange-brown with
occasional Fe-staining; occasional lenses of reddish brown,
very fine sand
BB
00
2020
4040
6060
1010
3030
5050
W /
LW-M -1D 1SW/
LW-M -1D 1S
FILLFILL
ML
SM ?
?
?
?
?
?
??
SP/SW2
SP/SW3
SP/SW1SP/SW1
SP/SW3
SP/SW4
LW-MW-2D/2 S
b 2
(set ack 1 ’)
LW-MW-2D/2 S
b 2
(set ack 1 ’)
?
SP/SW2
SP/SW3
ML
LW-MW-3D/3S
LW-MW-3D/3S W-W /4
L M -4 D S
(s e ah ad 7 ’
t e )W-W /4
L M -4 D S
(s e ah ad 7 ’
t e )NORTHSOUTH
ML
SP/SW3
SP/SW2SP/SW2 SP/SW2
ML
ML
?
?
??
SP/SW3
SP/SW1
ML
SM
?
SP/SW1 SP/SW1
SP/SW3
FILL FILL
ML
?
ND
0.035
ND
ND
17
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
?ML
E C Remediation2 FIGURE
5CPhone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Drive, Ste. 105
Bakersfield, California 93313
CROSS SECTION B - B’
SOIL cis-1,2-DCE
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
B’B’
00
4040
6060
1010
3030
5050
?
?
2020
Legend
First Encountered Shallow Water
ML - Silt; light gray and orange brown with Fe-staining in places
SP/SW1 -
SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines
SP - Poorly-Graded Sand
SW - Well-Graded Sand
Shallow Water Table w/date measured
Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper in color with occasional moderate
yellow brown lenses
SP/SW2 -Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper lenses with interbedded moderate
yellow brown and gray lenses
SP/SW3 -
Alternating lenses of poorly-graded and well-graded sands;
salt and pepper, moderate yellow brown and gray
SP/SW4 -
Alternating lenses of poorly-graded and well-graded sands;
interbedded lenses of gray and orange-brown with
occasional Fe-staining; occasional lenses of reddish brown,
very fine sand
BB
00
2020
4040
6060
1010
3030
5050
W /
LW-M -1D 1SW/
LW-M -1D 1S
FILLFILL
ML
SM ?
?
?
?
?
?
??
SP/SW2
SP/SW3
SP/SW1SP/SW1
SP/SW3
SP/SW4
LW-MW-2D/2 S
b 2
(set ack 1 ’)
LW-MW-2D/2 S
b 2
(set ack 1 ’)
?
SP/SW2
SP/SW3
ML
LW-MW-3D/3S
LW-MW-3D/3S W-W /4
L M -4 D S
(s e ah ad 7 ’
t e )W-W /4
L M -4 D S
(s e ah ad 7 ’
t e )NORTHSOUTH
ML
SP/SW3
SP/SW2SP/SW2 SP/SW2
ML
ML
?
?
??
SP/SW3
SP/SW1
ML
SM
?
SP/SW1 SP/SW1
SP/SW3
FILL FILL
ML
?
ND
ND
ND
ND
1.2
ND
ND
ND
ND
ND
0.71
ND
ND
ND
ND
ND
?ML
Phone: (661) 831-6906Fax: (661) 831-6234EC Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313CROSS SECTION C - C’SOIL PCEFIGURE6ALAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIAMLSP/SW3SP/SW2SP/SW2SP/SW3SP/SW3Horizontal Scale: 1.0-inch = 20 feet020 FTHorizontal ScaleVertical Scale: 1.0-inch = 20 feet020 FTVertical ScaleLegendFirst Encountered Shallow WaterML - Silt; light gray and orange brown with Fe-staining in placesSP/SW1 -SM - Silty Sand; reddish gray; generally very fine sands; non-plastic finesSP - Poorly-Graded SandSW - Well-Graded SandShallow Water Table w/date measuredAlternating lenses of poorly-graded and well-graded sands;generally salt & pepper in color with occasional moderateyellow brown lensesSP/SW2 -Alternating lenses of poorly-graded and well-graded sands;generally salt & pepper lenses with interbedded moderateyellow brown and gray lensesSP/SW3 -Alternating lenses of poorly-graded and well-graded sands;salt and pepper, moderate yellow brown and graySP/SW3MLMLC’02040EASTWEST601030500204060103050LW-MW-8D/8Sb(set ack 10’)LW-MW-8D/8Sb(set ack 10’)LW -6 S-MW D/6t ae ’)(se h ad 20LW-6 S-MW D/6t a e ’)(se h ad 20W5L -MW-5D/ St e5(se ah ad 1’)W5L-MW-5D/ St e 5(se ah ad 1’)W-MW-3D/3SLW-MW-3D/3SLW-L-MW2D/2Ste(se ahad 25’)W-L-MW2D/2Ste(se ah ad 25’)FILLFILLFILL?????SP/SW1SP/SW2SP/SW1SP/SW1?SP/SW4 -Alternating lenses of poorly-graded and well-graded sands;interbedded lenses of gray and orange-brown withoccasional Fe-staining; occasional lenses of reddish brown,very fine sandSP/SW3ML?W- W /4LM-4D St bck 2)(se a5’W- W /4LM-4D St b ck 2 )(se a 5’MLSP/SW3SP/SW2MLSP/SW1SP/SW3INTERSECT B-B’INTERSECT B-B’INTERSECT A-A’INTERSECT A-A’SP/SW2SP/SW2MLSP/SW3ML????????SP/SW1SP/SW1SP/SW2?ML??SP/SW1?FILLFILLFILLFILL?CND0.330.120.14NDNDNDNDNDNDND0.713NDNDNDNDNDND0.2720.106ND0.0570.375NDAnalytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2)
Phone: (661) 831-6906Fax: (661) 831-6234EC Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313CROSS SECTION C - C’SOIL TCEFIGURE6BLAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIAMLSP/SW3SP/SW2SP/SW2SP/SW3SP/SW3Horizontal Scale: 1.0-inch = 20 feet020 FTHorizontal ScaleVertical Scale: 1.0-inch = 20 feet020 FTVertical ScaleLegendFirst Encountered Shallow WaterML - Silt; light gray and orange brown with Fe-staining in placesSP/SW1 -SM - Silty Sand; reddish gray; generally very fine sands; non-plastic finesSP - Poorly-Graded SandSW - Well-Graded SandShallow Water Table w/date measuredAlternating lenses of poorly-graded and well-graded sands;generally salt & pepper in color with occasional moderateyellow brown lensesSP/SW2 -Alternating lenses of poorly-graded and well-graded sands;generally salt & pepper lenses with interbedded moderateyellow brown and gray lensesSP/SW3 -Alternating lenses of poorly-graded and well-graded sands;salt and pepper, moderate yellow brown and graySP/SW3MLMLC’02040EASTWEST601030500204060103050LW-MW-8D/8Sb(set ack 10’)LW-MW-8D/8Sb(set ack 10’)LW -6 S-MW D/6t ae ’)(se h ad 20LW-6 S-MW D/6t a e ’)(se h ad 20W5L -MW-5D/ St e5(se ah ad 1’)W5L-MW-5D/ St e 5(se ah ad 1’)W-MW-3D/3SLW-MW-3D/3SLW-L-MW2D/2Ste(se ahad 25’)W-L-MW2D/2Ste(se ah ad 25’)FILLFILLFILL?????SP/SW1SP/SW2SP/SW1SP/SW1?SP/SW4 -Alternating lenses of poorly-graded and well-graded sands;interbedded lenses of gray and orange-brown withoccasional Fe-staining; occasional lenses of reddish brown,very fine sandSP/SW3ML?W- W /4LM-4D St bck 2)(se a5’W- W /4LM-4D St b ck 2 )(se a 5’MLSP/SW3SP/SW2MLSP/SW1SP/SW3INTERSECT B-B’INTERSECT B-B’INTERSECT A-A’INTERSECT A-A’SP/SW2SP/SW2MLSP/SW3ML????????SP/SW1SP/SW1SP/SW2?ML??SP/SW1?FILLFILLFILLFILL?CND0.035NDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDNDAnalytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2)
Phone: (661) 831-6906Fax: (661) 831-6234EC Remediation25300 Woodmere Dr., Suite 105Bakersfield, CA 93313CROSS SECTION C - C’SOIL cis-1,2-DCEFIGURE6CLAKE TAHOE LAUNDRY WORKS1024 LAKE TAHOE BOULEVARDSOUTH LAKE TAHOE, CALIFORNIAMLSP/SW3SP/SW2SP/SW2SP/SW3SP/SW3Horizontal Scale: 1.0-inch = 20 feet020 FTHorizontal ScaleVertical Scale: 1.0-inch = 20 feet020 FTVertical ScaleLegendFirst Encountered Shallow WaterML - Silt; light gray and orange brown with Fe-staining in placesSP/SW1 -SM - Silty Sand; reddish gray; generally very fine sands; non-plastic finesSP - Poorly-Graded SandSW - Well-Graded SandShallow Water Table w/date measuredAlternating lenses of poorly-graded and well-graded sands;generally salt & pepper in color with occasional moderateyellow brown lensesSP/SW2 -Alternating lenses of poorly-graded and well-graded sands;generally salt & pepper lenses with interbedded moderateyellow brown and gray lensesSP/SW3 -Alternating lenses of poorly-graded and well-graded sands;salt and pepper, moderate yellow brown and graySP/SW3MLMLC’02040EASTWEST601030500204060103050LW-MW-8D/8Sb(set ack 10’)LW-MW-8D/8Sb(set ack 10’)LW -6 S-MW D/6t ae ’)(se h ad 20LW-6 S-MW D/6t a e ’)(se h ad 20W5L -MW-5D/ St e5(se ah ad 1’)W5L-MW-5D/ St e 5(se ah ad 1’)W-MW-3D/3SLW-MW-3D/3SLW-L-MW2D/2Ste(se ahad 25’)W-L-MW2D/2Ste(se ah ad 25’)FILLFILLFILL?????SP/SW1SP/SW2SP/SW1SP/SW1?SP/SW4 -Alternating lenses of poorly-graded and well-graded sands;interbedded lenses of gray and orange-brown withoccasional Fe-staining; occasional lenses of reddish brown,very fine sandSP/SW3ML?W- W /4LM-4D St bck 2)(se a5’W- W /4LM-4D St b ck 2 )(se a 5’MLSP/SW3SP/SW2MLSP/SW1SP/SW3INTERSECT B-B’INTERSECT B-B’INTERSECT A-A’INTERSECT A-A’SP/SW2SP/SW2MLSP/SW3ML????????SP/SW1SP/SW1SP/SW2?ML??SP/SW1?FILLFILLFILLFILL?CNDNDNDNDNDND0.71NDNDNDNDND0.51NDNDNDNDNDNDNDNDNDNDNDAnalytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2)
E C Remediation2 FIGURE
7APhone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Drive, Ste. 105
Bakersfield, California 93313
CROSS SECTION D - D’
SOIL PCE
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
B’B’
00
4040
6060
1010
3030
5050
2020
Legend
First Encountered Shallow Water
ML - Silt; light gray and orange brown with Fe-staining in places
SP/SW1 -
SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines
SP - Poorly-Graded Sand
SW - Well-Graded Sand
Shallow Water Table w/date measured
Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper in color with occasional moderate
yellow brown lenses
SP/SW2 -Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper lenses with interbedded moderate
yellow brown and gray lenses
SP/SW3 -
Alternating lenses of poorly-graded and well-graded sands;
salt and pepper, moderate yellow brown and gray
SP/SW4 -
Alternating lenses of poorly-graded and well-graded sands;
interbedded lenses of gray and orange-brown with
occasional Fe-staining; occasional lenses of reddish brown,
very fine sand
BB
00
2020
4040
6060
1010
3030
5050
EASTWEST
?
?
?
W-MW-4D/4S
L et a ea d107 ’)
(s hW-MW-4D/4S
L et a ea d107 ’)
(s h
ML
SP/SW3
SP/SW2
ML
?
?
SP/SW1
SP/SW3
FILL
5
LW-MW-5D/S
e 5
(set ah ad 2 ’)5
LW-MW-5D/S
e 5
(set ah ad 2 ’)
ML
SP/SW3
SP/SW3
MLML
S
LW-MW-6 D /6
s a(et b ck 13’)S
LW-MW-6 D /6
s a(et b ck 13’)
FILL
SP/SW3
?
SP/SW3
?
SP/SW2SP/SW2
ML
SP/SW1
?
SP/SW1 SP/SW1
SP/SW2
?
?
?
?
FILL FILL
INTERSECT C-C’INTERSECT C-C’
INTERSECT B-B’INTERSECT B-B’
INTERSECT A-A’INTERSECT A-A’
ND
ND
ND
0.713
ND
ND
ND
ND
ND
ND
0.272
0.106
Analytical in mg/Kg” ND = Not detected at or above
the Method Detection Limit (see Table 2)
E C Remediation2 FIGURE
7BPhone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Drive, Ste. 105
Bakersfield, California 93313
CROSS SECTION D - D’
SOIL TCE
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
B’B’
00
4040
6060
1010
3030
5050
2020
Legend
First Encountered Shallow Water
ML - Silt; light gray and orange brown with Fe-staining in places
SP/SW1 -
SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines
SP - Poorly-Graded Sand
SW - Well-Graded Sand
Shallow Water Table w/date measured
Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper in color with occasional moderate
yellow brown lenses
SP/SW2 -Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper lenses with interbedded moderate
yellow brown and gray lenses
SP/SW3 -
Alternating lenses of poorly-graded and well-graded sands;
salt and pepper, moderate yellow brown and gray
SP/SW4 -
Alternating lenses of poorly-graded and well-graded sands;
interbedded lenses of gray and orange-brown with
occasional Fe-staining; occasional lenses of reddish brown,
very fine sand
BB
00
2020
4040
6060
1010
3030
5050
EASTWEST
?
?
?
W-MW-4D/4S
L et a ea d107 ’)
(s hW-MW-4D/4S
L et a ea d107 ’)
(s h
ML
SP/SW3
SP/SW2
ML
?
?
SP/SW1
SP/SW3
FILL
5
LW-MW-5D/S
e 5
(set ah ad 2 ’)5
LW-MW-5D/S
e 5
(set ah ad 2 ’)
ML
SP/SW3
SP/SW3
MLML
S
LW-MW-6 D /6
s a(et b ck 13’)S
LW-MW-6 D /6
s a(et b ck 13’)
FILL
SP/SW3
?
SP/SW3
?
SP/SW2SP/SW2
ML
SP/SW1
?
SP/SW1 SP/SW1
SP/SW2
?
?
?
?
FILL FILL
INTERSECT C-C’INTERSECT C-C’
INTERSECT B-B’INTERSECT B-B’
INTERSECT A-A’INTERSECT A-A’
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
?
?
Analytical in mg/Kg” ND = Not detected at or above
the Method Detection Limit (see Table 2)
E C Remediation2 FIGURE
7CPhone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Drive, Ste. 105
Bakersfield, California 93313
CROSS SECTION D - D’
SOIL cis-1,2-DCE
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
B’B’
00
4040
6060
1010
3030
5050
2020
Legend
First Encountered Shallow Water
ML - Silt; light gray and orange brown with Fe-staining in places
SP/SW1 -
SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines
SP - Poorly-Graded Sand
SW - Well-Graded Sand
Shallow Water Table w/date measured
Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper in color with occasional moderate
yellow brown lenses
SP/SW2 -Alternating lenses of poorly-graded and well-graded sands;
generally salt & pepper lenses with interbedded moderate
yellow brown and gray lenses
SP/SW3 -
Alternating lenses of poorly-graded and well-graded sands;
salt and pepper, moderate yellow brown and gray
SP/SW4 -
Alternating lenses of poorly-graded and well-graded sands;
interbedded lenses of gray and orange-brown with
occasional Fe-staining; occasional lenses of reddish brown,
very fine sand
BB
00
2020
4040
6060
1010
3030
5050
EASTWEST
?
?
?
W-MW-4D/4S
L et a ea d107 ’)
(s hW-MW-4D/4S
L et a ea d107 ’)
(s h
ML
SP/SW3
SP/SW2
ML
?
?
SP/SW1
SP/SW3
FILL
5
LW-MW-5D/S
e 5
(set ah ad 2 ’)5
LW-MW-5D/S
e 5
(set ah ad 2 ’)
ML
SP/SW3
SP/SW3
MLML
S
LW-MW-6 D /6
s a(et b ck 13’)S
LW-MW-6 D /6
s a(et b ck 13’)
FILL
SP/SW3
?
SP/SW3
?
SP/SW2SP/SW2
ML
SP/SW1
?
SP/SW1 SP/SW1
SP/SW2
?
?
?
?
FILL FILL
INTERSECT C-C’INTERSECT C-C’
INTERSECT B-B’INTERSECT B-B’
INTERSECT A-A’INTERSECT A-A’
ND
ND
ND
ND
0.51
ND
ND
ND
ND
ND
ND
ND
?
?
Analytical in mg/Kg” ND = Not detected at or above
the Method Detection Limit (see Table 2)
Project Number: 1950BK49/27DraftVE-1 VE-2 VE-3 VE-4 VE-5 VE-6 VE-7 VE-8 VE-9 VE-10 VE-11 VE-12 VE-13 VE-14 VE-15 VE-16 VE-17 VE-18 VE-19 VE-20 MW-1S MW-2S MW-5S MW-9S MW-10S MW-11S MW-12S MW-13S VP-1 VP-2 VP-3 VP-4 VP-5 VP-6 VP-7 VP-8 VP-9 VP-10 HVE-1 HVE-2 HVE-3 HVE-4 HVE-5 HVE-6VE-1X 40 80 130 178 226 255 305 250 195 170 128 83 295 268 237 167 120 65 42 8 43 145 82 100 187 38 294 55 10 34 53 52 90 98 114 138 187 20 48 80 40 67 95VE-2X X 45 95 142 183 218 267 212 160 134 92 50 257 235 205 135 90 45 52 40 38 115 50 117 154 74 257 65 28 33 15 40 65 60 78 116 155 25 8 37 42 50 70VE-3X X X 48 97 140 175 220 170 118 92 55 38 234 192 160 94 57 50 88 82 70 72 6 132 115 120 212 93 73 73 30 58 45 23 37 80 118 70 40 10 70 50 43VE-4XXXX4897125172125735542701651421175550851281351175045165651671701351201187797654025528512090601189063VE-5XXXXX4780135854547751151179577458012816718016270932022521512017516816512514210587656072170140110165137108VE-6XXXXXX35956359801181627050527512217421823023011514024545262782152052071671821431281059085220190160214184152VE-7XXXXXXX604067901401854050751101552052502592381271702778029043254253233213232220160145130122250220190247216190VE-8XXXXXXXX57108135180220459513517021526230530428016522033514023824303303296262286197215225220213298268238301274246VE-9XXXXXXXXX5280123172679210712716520825225322310816528610028455258247240207235197180175175175243213183247221195VE-10XXXXXXXXXX2772120107105105901181581992001726011424070232100200185185153180145135130137147187157127195167143VE-11XXXXXXXXXXX45941351301208710413717717514532902201032051271831631571251771408593115140160130102170145122VE-12XXXXXXXXXXXX47177167155979010314013210018551851301621781471201057811393326095124114856012810894VE-13XXXXXXXXXXXXX22520918512294801028252643815813211722011375574082802867112150654030908380VE-14XXXXXXXXXXXXXX529514519224429029527516521021411533222290295293255275232240218200178293263233290260230VE-15XXXXXXXXXXXXXXX451071582162582712581601872758030572257255272239240196183155127104268238208252222192VE-16XXXXXXXXXXXXXXXX70120177221240232145155232532731152502532351902301581651258760229198171212182152VE-17XXXXXXXXXXXXXXXXX5010715217016110087170302051521531441951411469510253254016313510814511585VE-18XXXXXXXXXXXXXXXXXX571001201221005012277156198102110120757330703030671159070936333VE-19XXXXXXXXXXXXXXXXXXX456582120488213410024848557740152870638712365515434528VE-20XXXXXXXXXXXXXXXXXXXX47280150876020565292133575623072132107132165506587174677MW-1SXXXXXXXXXXXXXXXXXXXXX50150879522235298481540565290102115150187205080376596MW-2SXXXXXXXXXXXXXXXXXXXXXX1157714018065272924084575100771051501872739647283102MW-5SXXXXXXXXXXXXXXXXXXXXXXX722029617815816413512095130107397010313213210377145125109MW-9SXXXXXXXXXXXXXXXXXXXXXXXX131105124210957075335842253075112754417745040MW-10SXXXXXXXXXXXXXXXXXXXXXXXX X2001173204795130118751001551401471701181261407589108MW-11SXXXXXXXXXXXXXXXXXXXXXXXX X X226122180155180140147105105754050185155125170140110MW-12SXXXXXXXXXXXXXXXXXXXXXXXX X X X3297550579087125130150185224558511573102133MW-13SXXXXXXXXXXXXXXXXXXXXXXXXXXXX314296293255278237230197185173294264234293264235VP-1XXXXXXXXXXXXXXXXXXXXXXXXXXXXX4585724573115110130163687895285080VP-2XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX3540408085100135175173665285079VP-3XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX457095801051431922036646576100VP-4XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX4253456510314239924484035VP-5XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX408075100135555060181545VP-6XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX6540609587675563315VP-7XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX4085124834725957565VP-8XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX45831057548956742VP-9XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX40145117951259565VP-10XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX187160135163133103HVE-1XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX3060456085HVE-2XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X30504763HVE-3XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX X X705150HVE-4XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX3060HVE-5XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX30HVE-6XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXHVE DISTANCE FROM APPROXIMATE MID-POINT OF THE HVE WELL SCREENDOES NOT INCLUDE SPARGE WELLSTABLE V-1WELL DISTANCE MATRIX CHART1024 Lake Tahoe BoulevardSouth Lake Tahoe, CaliforniaLake Tahoe Laundry WorksE2C RemediationV-1
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-1APILOT TEST #1 (APRIL 6, 2010)
SHALLOW OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
Note: HVE-1 through HVE-3
were active during this test.
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
VES-1
VES-12
VES-13
VES-2
VES-19
VES-20
VES-18
VES-17
VES-16
VES-6
VES-7VES-10
VES-9
VES-15
VES-8
VES-14
VES-3
VES-5
VES-4
VES-11
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-2APILOT TEST #2 (APRIL 6, 2010)
SHALLOW OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: HVE-1 through HVE-6
were active during this test.
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-3APILOT TEST #3 (APRIL 7, 2010)
SHALLOW OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-1S&D, VE-2S&D, VE-3S&D, VE-4S&D,
VE-12S&D, VE-13S&D, VE-18S&D, VE-19S&D,
and VE-20S&D were active during this test.
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-3BPILOT TEST #3 (APRIL 7, 2010)
DEEP OBSERVATION WELL VACUUM
ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-1S&D, VE-2S&D, VE-3S&D, VE-4S&D,
VE-12S&D, VE-13S&D, VE-18S&D, VE-19S&D,
and VE-20S&D were active during this test.-25-20-15
-10
-
5
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-4APILOT TEST #4 (APRIL 7, 2010)
SHALLOW OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-5S, VE-6S, VE-8S, VE-9S, VE-10S,
VE-11S, VE-14S, VE-15S, VE-16S, and
and VE-17S were active during this test.
-50
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-4BPILOT TEST #4 (APRIL 7, 2010)
DEEP OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
VE-1
VE-12
VE-13
VE-2
VE-19
VE-20
VE-18
VE-17
VE-16
VE-6
VE-7VE-10B
VE-9
VE-15
VE-8
VE-14
VE-3
VE-5
VE-4
VE-11
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-5S, VE-6S, VE-8S, VE-9S, VE-10S,
VE-11S, VE-14S, VE-15S, VE-16S, and
and VE-17S were active during this test.
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-5APILOT TEST #5 (APRIL 7, 2010)
SHALLOW OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-4D, VE-5S&D, VE-6S&D, VE-7S&D,
VE-8S&D, VE-9S&D, VE-10S&D, VE-11S&D,
VE-14S&D, VE-15S&D, VE-16S&D, and
and VE-17S&D were active during this test.
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-5BPILOT TEST #5 (APRIL 7, 2010)
DEEP OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-4D, VE-5S&D, VE-6S&D, VE-7S&D,
VE-8S&D, VE-9S&D, VE-10S&D, VE-11S&D,
VE-14S&D, VE-15S&D, VE-16S&D, and
and VE-17S&D were active during this test.
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-6APILOT TEST #7 (APRIL 8, 2010)
SHALLOW OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-1S, VE-2S, VE-3S, VE-4S, VE-5S, VE-6S,
VE-7S, VE-8S, VE-9S, VE-10S, VE-11S, VE-12S,
VE-13S, VE-14S, VE-15S, VE-16S, VE-17S, VE-18S,
VE-19S, VE-20S, HVE-1, HVE-2, HVE-3, HVE-4,
HVE-5, and HVE-6 were active during this test.
-25
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-6BPILOT TEST #7 (APRIL 8, 2010)
DEEP OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
VED-1
VED-12
VED-13
VED-2
VED-19
VED-20
VED-18
VED-17
VED-16
VED-6
VED-7VE-10B
VED-9
VED-15
VED-8
VED-14
VED-3
VED-5
VED-4
VED-11
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-1S, VE-2S, VE-3S, VE-4S, VE-5S, VE-6S,
VE-7S, VE-8S, VE-9S, VE-10S, VE-11S, VE-12S,
VE-13S, VE-14S, VE-15S, VE-16S, VE-17S, VE-18S,
VE-19S, VE-20S, HVE-1, HVE-2, HVE-3, HVE-4,
HVE-5, and HVE-6 were active during this test.
-0
.1
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-7APILOT TEST #8 (APRIL 8, 2010)
SHALLOW OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-1S, VE-2S, VE-3S, VE-4S, VE-5S, VE-6S,
VE-7S, VE-8S, VE-9S, VE-10S, VE-11S, VE-12S,
VE-13S, VE-14S, VE-15S, VE-16S, VE-17S, VE-18S,
VE-19S, VE-20S, HVE-1, HVE-2, HVE-3, HVE-4,
HVE-5, and HVE-6 were active during this test. Also,
all sparge wells were operating.102020
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-7BPILOT TEST #8 (APRIL 8, 2010)
DEEP OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-1S, VE-2S, VE-3S, VE-4S, VE-5S, VE-6S,
VE-7S, VE-8S, VE-9S, VE-10S, VE-11S, VE-12S,
VE-13S, VE-14S, VE-15S, VE-16S, VE-17S, VE-18S,
VE-19S, VE-20S, HVE-1, HVE-2, HVE-3, HVE-4,
HVE-5, and HVE-6 were active during this test. Also,
all sparge wells were operating.
-10
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-8APILOT TEST #9 (APRIL 9, 2010)
SHALLOW OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-1S, VE-2S, VE-20S, HVE-1, HVE-2, HVE-3,
HVE-4, HVE-5, and HVE-6 were active during this test.
Also, all sparge wells were operating.
LAKE TAHOE LAUNDRY WORKS
1024 LAKE TAHOE BOULEVARD
SOUTH LAKE TAHOE, CALIFORNIA
Phone: (661) 831-6906
Fax: (661) 831-6234
5300 Woodmere Dr., Suite 105
Bakersfield, CA 93313
E C Remediation2
TRANSIT
STATION
FIGURE
V-8BPILOT TEST #9 (APRIL 9, 2010)
DEEP OBSERVATION WELL
VACUUM ISOCONTOUR PLOT
LAKE
T
A
H
O
E
B
O
U
L
E
V
A
R
DGLORENEAVENUE
RALEYS
LTLW
LEGEND
0FT 50
F
T
N AS Well
AS-1
SVE Well Pair (nested)
VE-1
LW-MW-13S New SZA Groundwater
Monitoring Well
LW-MW-1S Existing SZA Groundwater
Monitoring Well
VP-1 Vapor Sampling Point
Horizontal SVE Well
(screen location)
Vacuum Isocontour (in-H O)2
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
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
HVE-4
HVE-5
HVE-6
HVE-1
HVE-2
HVE-3
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-26
AS-27
HVE-1
Note: VE-1S, VE-2S, VE-20S, HVE-1, HVE-2, HVE-3,
HVE-4, HVE-5, and HVE-6 were active during this test.
Also, all sparge wells were operating.