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2023.04.06 Board Agenda AttachmentsSouth Tahoe Public Utility District TAHOE VALLEY SOUTH SUBBASIN (6-005-01) ANNUAL REPORT Water Year 2022 6 April 2023 [1_ _1_' 11_ ___1_' r-%r * Basin Overview Summary of WY2022 (Oct 1, 2021 - Sept 30, 2022) Conditions WY2023 Precipitation Accumulation To Date yourr+ rayoF 1950 � B��C IITILIYY * Elevations: Groundwater Basin: 6225- 6500 ft msl Mountain Block (> 6500 ft msl — Watershed Divide) South Tahoe Groundwater Model (STGM) Mountain Block (Zone 1) NS Subbasin (Zone lo) yourr+ TA 1950 � B��C UTILITY Ot`� P 'i 'Z. rCo�•.�.� j •.= %.. BURKE CREEK / 1 �% 7 CIO Po�G 11 �"� [Zone 10j TAYLOR CREEK f I •�'•.f [Zone 11 / j TROUT CREEK 1 rol—J ' Zone 1 [ 1 J z 14JtER TRU::KEE RIVER Legend C A R L1 South Tahoe Groundwe.er MoRei Oomain �~ S O ;, I I El Ootado County % .- _�••� TVS Subbasin (6-0O511) Novaoa Extenswo of Groundwaler Basin l Watershads (TRPA) BUOV CREEK BIJOU PARK BURKE CREEK 1 // CAMP RICHAROSON '•� // CASCADE CREEK (/ EAGLE CREEK EDGEWOOD CREEK // `n TALLAC CREEK % TAYLOR CREEK TROUTCREEK Y KitSaHan- �Y UPPER TRUCKEE RNER 37022 0 0 S t 7 1 INM 70 9 50 40 30 20 10 W, TVS SUBBASIN WATER YEAR TYPE T Snotel 508: Hagans Meadow, CA 0) r1 m In r M .1 cn In r- rn -i m Ln r- rn r-I m Ln rl- rn .� r,00 00 00 00 00 0) (n M 0) a) O O O O O 1-I 1-4 —4 r1 —4 N rn 0) M m Om M rn M 011 M M O O O O O O O O O O O a -I r-I -1 ri 14 -4 -1 ri -1 -1 a -I fV fV fV N N N N fJ N N N Water Year Water Year 2022 had normal precipitation Lege GW El. QROUNDW� TAHOE VALLEY SOUTH SUBBASIN [ 6-005.01 ] Total Precipitation Hndrsn OW—Washoan OW Martin OW —Lily OW 6,360 Q 6,340 Q z z 6,320 O H 4 w 6,300 w 4 6,280 z O 6,260 6,240 6,220 6,200 P � ePA1 Qq 10 LN LI 1'� 0 ,5 i6 lry 1$ 19 10 tiS 11 Se Se Se Se S 4 - ".9 Sep" c� v Sep" cjev cue Sep ,,e S. " geP S.9 SeQ" Siff SO 70 65 60 3 55 50 3 45 40 az 35 0 b 30 a 25 20 x 15 ° 10 c a` 5 0 Measured water levels are generally stable over a range of hydrologic conditions TVS Subbasin Community Water System Pumpage .4 CWS WELLS - TOTAL 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 WATER YEAR C) 20,000 15,000 Lj- Q 10,000 C Cu E 0 (U 5,000 M C 3 0 L -5,000 -10,000 Total Precipitation TVS SUBBASIN GROUNDWATER USE and STORAGE GW Production Annual Change in GW Storage Cumulative Change in GW Storage 70 65 60 55 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 Water Year 3 z a 50 v 45 40 q � 35 30 � 25 0 mz 20 a i 0 15 10 5 0 Modeled GW Storage has increased with normal precipitation because of increased recharge 0 ti Oct 2021 /April zozz Sentinel Well Monitoring PCE pia TKWC 1 -SW-1 _ 120 ppb PCE Cia TKWC z -SW-1 = 43 ppb PCE Cia LBWC 1 -SW-1 = ND LBWC 5 -Sw-3 = 16o ppb LRWQCB Soil gas sampling Arsenic still present Uranium/Gross alpha activity Treatment at TKWC z and 3 TKWC 1 0 TKWC 1-SW-11SW-2 TKWC 3 4 TKWC 2 TKWC2-SW-11SW-2 Tahoe Keys LBWC 2LBWC 5 LBWC5-SW-11SW-2 LBWC 1 LB WC I -SW-1 /S W-21S W-3 LBWC 4 O - South Lake Tahoe Legend 2021 Sentinel Well CWS Well - Status LBWC 3 Active Inactive o Destroyed Proposed - - 2020 South Y PCE Plume Clement Well PCE Concentration (AECOM, 2021) -- — _ 5 _50 ugfL 50 100 7 R— - ug/L Sw South Y Well 1 100 - 500 usrL ��.` .. � � shoe � 500 ug1L Tahoe Valley South Groundwater Basin - Geographic Subarea Tata #2Tata #3 Angara � r r y � aTata #1 Bijou ' Christmas Valley Meyers South Lake Tahoe Tahoe Keys W2022 �� Industrial #2 o sus zso 150r zzso Feer % Industrial #1 �.l ��I• LBWC 6 Airport V Meyers 1950 � UTILITY 01$1P Fulfilled Alternative Annual Reporting Requirements (SGMA) Fulfilled GW Elevation Monitoring Requirements (CASGEM) Collaboration with the Alternative Plan Stakeholders Advisory Group Alternative Plan Submitted April zozz * Updated the South Tahoe Groundwater Model (STGM) * Conducted administrative, technical, and public engagement tasks Public Outreach � Documents posted to Groundwater Web Page - Board Meeting Presentations/Updates (November2021) SAG Workshops (January and August zozz) yO,yTN TAH0 �Se�eri On -Going: Monitor regulations and BMP guidance Monitor basin conditions &groundwater supplies Update and Maintain the STGM Collaborate with EDWA &SAG Public Outreach Support Annual Water Supply and Demand Assessment (WSDA) New (Planned): � Apply for Round z SGM Grant Funding (complete in Dec zozz) * Evaluate potential new shallow groundwater Monitoring Locations (ISWs, GDEs) * Implement Actions adopted in the Alternative Plan yO�yTH 7RHOP e�� u7'II MY Ot�P 20U-rti TA 0'� �e�er 1950 a ITEM 6.b. DIETrareTars Dr.THrr. -INK-kr IWO, 0, 07 WI, I I I akrAwk 41011HU �fh AF- -31E­ Am t u s and. Current Activities' Trevor Coolidge - Senior Engineer 71 7 Apr'il 6 2023 k7 DVR Overview o Harvey Place Reservoir Releasing @ 5 cfs since April 15t 5' below overflow, minimal level change o Indian Creek Reservoir —11 cfs flushing flow o On -farm System - Emergency release location-- and conveyance to downstream ranches z o Ditches (canals), roads, and culverts impacted by �I. heavy runoff, current debris removal & repair work, , ; y Diamond Ditch - Conveys recycled water from HPR - Currently Restricted to 5 cfs, pending repair from snow removal work ...1& ';0 aSN. - IV- �. ti f J� J ' On -Farm System o Ditches, Canals o Roads o Monitoring Wells �Y• w 'k. { t - - • � x. '� M1 y � - �' yam" rem. lam: "T". Pw ■WI, a. On -Farm System 2891D CAT M 2-02-3 7-.'.00 1-7 PM Dressler Ditch - Intercepts natural runoff, conveys freshwater to ICR - Functioning, but major access road and drainage issues General DVR Erosion, Debris Issues — Ongoing Work - District & Contractor Crews FWI" VC.I* 4 _W I.. 'VIAL A MOW MM 1% 1 r 4•y�,r 7�- �� �L� _ .� • • - 1 � z �X�` ^ � - is ••L�'+3 � ' � _ �_. _~ � i� �. •L � fir• ... �f-4darvey Place Reservoir• , • .. - - rr=�.���•��+��. • ..- �•� � •f. •4•`~�•. -�� •--�•��`} 5 •' �, .bra f+:-•' '_ ., _-. _z - •r- - - - _ �- _••}ti .. � � ''��^ .' � .-yam •. __ -. _ Lip _ - 1 _ .. l 1 - - .. -� 'r 1•�• •mac• r r r r•� -" - - '}• z. - _ _ .�F'T•'. f _ .i' : �A��i �•.'�af �•IL _ ��N1r�Mv i_.'�n•��•Y ,..�Ya.i�$iL�eF�ii Vi��1 •k •• - _ v.x..L y,,1 South Tahoe Public Utility District Memorandum Date: April 4, 2023 To: Board of Directors John Thiel, General Manager From: Brent Goligoski, Associate Engineer Subject: Recommendation for Bid Award Secondary Clarifiers No. 2 Rehabilitation Project As indicated in the attached memorandum and summary by the Contracts Administrator, Staff has found irregularities in all three bids received. There is an important distinction, however, between irregularities that are immaterial and ones that are material. Immaterial irregularities may be waived by the Governing Board, in its discretion. Material irregularities generally give the bidder an unfair competitive advantage or contain errors that would permit the bidder to withdraw its bid. Material irregularities may not be waived. The apparent low bid received from T&S Construction Co., Inc. (T&S) contained minor irregularities as listed in the attached memorandum by the Contracts Administrator. A requirement of the District's funding source is that the bidders perform a Good -Faith Effort (GFE) to seek participation by Disadvantaged Business Enterprises (DBE). Staff performed a review of the low bidder's DBE documentation and was able to address all irregularities with T&S and staff is satisfied that the DBE GFE requirements have been met. Staff recommends that the Board 1) Find minor irregularities in the bid from T&S Construction Co., Inc. (T&S) to be immaterial and waive immaterial irregularities; and 2) Award Project to the lowest responsive, responsible bidder, T&S Construction Co., Inc. in the amount of $2,064,900.00. South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Telephone:(530)544-6474 Fax:(530)541-4319 Memorandum Date: April 4, 2023 To: Board Members, John A. Thiel From: Starlet Glaze, Contracts Administrator Subject: Secondary Clarifier No. 2 Rehabilitation Project At 2:00 o'clock on the afternoon of March 28, 2023, we received three (3) electronic bids via PlanetBids for the above -referenced project. Bids ranged from $2,064,900.00 to $2,161,619.41. A careful review and analysis of the three (3) Bids received was completed by District Staff. See attached spreadsheet and list of deviations for full breakdown of each bid. T & S Construction Co., Inc. is the apparent low bidder. T & S Construction Co., Inc. had only minor deviations. I contacted the Contractors License Board and was given the following information: License Number 301528 is current and active and expires 04/30/2025. The company is a corporation. T & S Construction Co., Inc. holds a Class A — General Engineering license. I also contacted the California Department of Industrial Relations Contractor Registration site and verified that T & S Construction Co., Inc. is registered under PWCR Number 1000000972. South Tahoe Public Utility District . 1275 Meadow Crest Drive, South Lake Tahoe, CA 96150 Phone 530.544.6474 . Facsimile 530.541.0614 Bid Results for Secondary Clarifier No. 2 Rehabilitation Project Bid Advertised: on February 10, 2023 Bid Ooenine: March 28. 2023 2:00 PM (Pacific) Farr Construction Corporation T & S dba Resource Initial Revised Item Construction Co., KG Walters Development Engineer's Engineer's Num Description Unit Quantity Inc. Construction Company Estimate Estimate Bid Schedule A Secondary Clarifier No. 02 Rehabilitation Project Mobilization and demobilization including bonds and insurance, and cleanup. (Note: this lump sum figure cannot exceed 10 percent of the total amount of Bid Schedule B 1 (excluding this item). LS 1 $ 150,000.00 $ 175,000.00 $ 105,000.00 $ 150,000.00 $ 150,000.00 Secondary Clarifier No. 2 Rehabilitation work including demolition work, launder covers, concrete rehabilitation work, and installation of new RAS piping, electrical and instrumentation work, and all ancillary work associated with these facilities, complete as shown and as specified in these Contract Documents, excluding only work listed in the other 2 bid items herein. LS 1 $ 970,000.00 $ 866,000.00 $ 736,600.91 $ 800,000.00 $ 825,000.00 Secondary Clarifier No. 2 Damaged Expansion Joint Material Removal and Replacement, including preparation, labor, 3 materials, and necessary equipment. LF 60 $ 7,500.00 $ 2,400.00 $ 21,810.00 $ 12,000.00 $ 12,000.00 Secondary Clarifier No. 2 Sludge Collector Mechanism Equipment installation, including startup and testing for a 4 fully functional system. LS 1 $ 225,000.00 $ 368,000.00 $ 219,000.00 $ 150,000.00 $ 250,000.00 Secondary Clarifier No. 2 Sludge Collector Mechanism concrete foundation including inlet piping, sump, subgrade preparation, formwork, concrete, and all materials and labor 5 associated with installation of the new foundation. LS 1 $ 200,000.00 $ 160,000.00 $ 524,500.00 $ 150,000.00 $ 165,000.00 Externally bonded fiberglass reinforced plastic reinforcement as specified in Section 03_O1_30.72, including surface preparation prior to application of the material, for 6 Secondary Clarifier No. 2. SF 1435 $ 57,400.00 $ 34,440.00 $ 33,148.50 $ 71,750.00 $ 71,750.00 Provide, install, and maintain erosion control measures and 7 other required BMPs complete and in place. LS 1 $ 5,000.00 $ 15,000.00 $ 4,600.00 $ 15,000.00 $ 25,000.00 8 Dewatering of excavations. LS 1 $ 40,000.00 $ 85,000.00 $ 104,500.00 $ 60,000.00 $ 55,000.00 Installation and maintenance of shoring and soil stabilization for worker safety in accordance with OSHA and District 9 requirements. LS 1 $ 15,000.00 $ 54,000.00 $ 7,300.00 $ 40,000.00 $ 40,000.00 10 Structural concrete repairs for tank walls and floor. SF 100 $ 15,000.00 $ 10,500.00 $ 19,000.00 $ 11,000.00 $ 25,000.00 Concrete crack repair using hydrophobic foam polyurethane 11 resin injection system. LF 300 $ 30,000.00 $ 39,000.00 $ 36,960.00 $ 30,000.00 $ 45,000.00 12 Allowance for unknown underground conditions. LS 1 $ 25,000.00 $ 25,000.00 $ 25,000.00 $ 25,000.00 $ 25,000.00 Removal of Sand Fill and PVC Piping, and Installation of Interstitial Wall Fill with Cellular Concrete for Secondary 13 Clarifier No. 2. 1 LS 1 $ 125,000.00 $ 125,000.00 $ 124,200.00 $ 125,000.00 $ 150,000.00 Subtotal $ 1,864,900.00 $ 1,959,340.00 $ 1,961,619.41 $ 1,639,750.00 $ 1,838,750.00 Bid Schdule B: Miscellaneous System Improvements 14 As -Needed Sewer System Improvements LS 1 $ 100,000.00 $ 100,000.00 $ 100,000.00 $ 100,000.00 $ 100,000.00 15 As -Needed Water System Improvements LS 1 $ 100,000.00 $ 100,000.00 $ 100,000.00 $ 100,000.00 $ 100,000.00 Subtotal 1 $ 200,000.00 1 $ 200,000.00 1 $ 200,000.00 1 $ 200,000.00 1 $ 200,000.00 Total 1 $ 2,064,900.00 1 $ 2,159,340.00 1 $ 2,161,619.41 1 $ 1,839,750.00 1 $ 2,038,750.00 Secondary Clarifier No. 2 Rehabilitation Project Bid Opening: Tuesday, March 28, 2023 at 2:00 o'clock p.m. Deviations and information gathered during bid analysis of the three Bids received: T & S Construction Co., Inc. • List of Subcontractors o The full entity names of four of the subcontractor's listed on the Bid Form did not match either the Contractor's State License Board (CSLB) or the California Department of Industrial Relations (CA DIR) websites. o The full entity name of one of the subcontractors listed on the Bid Form did not match the CSLB or CA DIR websites, however, the address did match the CA DIR Registration. o We were, however, able to verify the correct entity names and addresses of all of the subcontractors, and that they have an active California License, and are registered and current with the CA-DIR. • Bidder's General Information, Item 1 o The address listed on the Bid form does not match either the CSLB or CA DIR websites. We were, however, able to verify that both addresses were current and used for mailing purposes. K.G. Walters Construction Co., Inc. • List of Subcontractors o The full entity names of four of the subcontractor's listed on the Bid Form did not match either the Contractor's State License Board (CSLB) or the California Department of Industrial Relations (CA DIR) websites. o The full entity name of one of the subcontractors listed on the Bid Form matched the CA DIR website, however, it did not match the CSLB website. o We were, however, able to verify the correct entity names and addresses for all of the subcontractors, and that they have an active California License, and are registered and current with the CA-DIR. Bidder's General Information, Item 6 o The authorized agent provided the surety company's name but not an address or phone number. We were, however, able to verify that the Bid Bond is valid and meets District requirements. Certification by Contractor's Insurance Broker o The Certification was filled out incorrectly. The full name of the insurance company was not provided. We were, however, able to obtain the insurance company's information and verify through the California Department of Insurance and AM Best websites that the company meets District's requirements. Farr Construction Corporation dba Resource Development Company • List of Subcontractors o A subcontractor's address which was listed on the Bid Form did not match either the Contractor's State License Board (CSLB) or the California Department of Industrial Relations (CA DIR) websites. We were, however, able to verify that both addresses were current and used for mailing purposes. • Bidder's General Information, item 6 o The authorized agent did not provide the surety company's name address or phone number. We were, however, able to obtain the information directly from the Bid Bond and verify that it is valid and meets District requirements. • Bid Forms o The Contractor failed to submit Grant Form EPA 4500-3 with the Bid documents prior to the Bid Opening. Secondary Clarifier No. 2 Rehabilitation Project CONTRACTOR'S SUBCONTRACTORS T & S Construction Co., Inc. Description of Work Subcontractors Name & Address Electrical 5% San Joaquin Electric PO Box 30068 Stockton, CA 30068 CA#410103; CA DIR(PWC)#1000002857 FRP Reinforcement 2% Ichor Restoration 7601 Chester Dr. Prunedale, CA 93907 CA#850552; CA DIR(PWC)#1000005796 Rebar 1 % RCK & Associates, Inc. Reinforcing PO Box 8008 Sacramento, CA 95818 CA#936123; CA DIR(PWC)#1000030332 Cellular Fill 2% Cell -Crete 995 Zephyr Ave Hayward, CA 94544 CA#243404; CA DIR(PWC)#1000000262 K.G. Walters Construction Co., Inc. Description of Work Subcontractors & Address Reinforcing Steel 1.5% Camblin Steel 548 Gibson Dr. suite 150 Roseville, CA 95678 CA#218839; CA DIR(PWC)#1000003852 Crack Repair/FRP Reinforcement 3% Ichor Restoration 7601 Chester Dr. Prunedale, CA 93907 CA#850552 C61-D 12; CA DIR(PWC)#1000005796 Painting/Coating 9% FD Thomas P.O. Box 4663 Medford, OR 97501 CA#610403; CA DIR(PWC)#1000000093 Electrical 4% San Joaquin Electric P.O. Box 30068 Stockton, CA 95213 CA#410103; CA DIR(PWC)#1000002857 Dewatering/Drilling 2.5% Viking Drillers, Inc. 5950 Granite Lake Dr. Granite Bay, CA 95746 CA#476668; CA DIR PWC #1000002722 Secondary Clarifier No. 2 Rehabilitation Project CONTRACTOR'S SUBCONTRACTORS Cellular Fill 3% Cell — Crete Corporation 135 E. Railroad Ave. Monrovia, CA 91016-4652 CA#243404; CA DIR(PWC)#1000000262 AC Paving 1.5% G.B. General Engineering P.O. Box 7858 South Lake Tahoe, CA 96158 CA#792014 A; CA DIR(PWC)#1000049509 Farr Construction Corporation dba Resource Development Company Description of Work Subcontractors & Address Dewatering 4.5% Viking Drillers, Inc 5950 Granite Lake Drive Granite Bay, CA 95746 CA#476668; CA DIR PWC #1000002722 Electrical/Instrumentation 4.5% SAN JOAQUIN ELECTRIC INC 8985 Double Diamond Pkwy B9 Reno, NV 89521 CA#410103; CA DIR PWC #1000002857 Cellular Concrete 2% GONSALVES & SANTUCCI INC dba CONCO 5141 COMMERCIAL CIRCLE CONCORD, CA 94520 CA#199902; CA DIR PWC #1000000409 FRP Installation& Hydrophobic Foam injection ICHOR RESTORATION 3% 7601 CHESTER DR PRUNEDALE, CA 93907 CA#850552 C-61/D12; CA DIR(PWC)#1000005796 Paving 1 % West Coast Paving Inc. P.O. Box 19102 Reno, NV 89511 CA#972431; CA DIR(PWC)#1000020405 Annual Sewer Inspection Update Ross Cole Asset Management Analyst Sewer Asset Management Program Gravity Main Condition Assessment . 312 Miles of sewer main line total = 1.65M linear feet (LF) . 330 Pipes on Enhanced Cleaning List (EC) . Goal =Inspect 10% of system per year . Current equipment: Large CCTV Truck and newer portable camera for easements . Follow industry standard for defect coding (PACP) O TH TAHO `e ��' Ui7L1TY CCTV Inspection Program Overview . Recent Inspection Progress Our goal for 2023 is to complete at least 165,000 LF of inspections o= ��' (R7L1TY Point Defect Holes, Fractures, Surface damage Root Defect Roots in laterals / joints Continuous Defect Multiple fractures, extended surface damage Sag Defects High water levels, Change in water level Spot Repair RootX Herbicide / Spot Repair Full CIPP Lining Open Trench Replacement Corrective Action Based on Defect Type 2023 estimates for Total Project Costs per linear foot: • $630 / LF for Open Trench Construction • $180 / LF for Cast -in -Place Pipe (CIPP) q_O T MHO `e ��' Ui7L1TY % of Pipes with Point Defects % of Pipes with Continuous Defects % of Pipes with Sags & Other Defects 963 Pipes 1,653 Pipes 2,104 Pipes Inspected Inspected Inspected (27% of (32% of (38% of System) System) system) 22% 23% 23% 1.2% 0.8% 0.8% 3% 2.5% 2.5% 2,811 Pipes Inspected (48% of system) 20% 2.2% Next Steps • Inspect Remaining EC Pipes • Develop Data -driven Capital Projects Continue using inspection data to identify geographical project areas based on condition • Continue Refining Future Inspection Priorities Continue working with local partners to inspect ahead of their construction projects Focus inspections in areas with known I&I problems • Force Main Asset Management Program Inspection of the C Export line (October 2023) • Baseform O TH TAHO `e ��' Ui7L1TY Questions? O SH .y HO `e ��' (R7L1TY G