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Home My WebLink AboutAgenda Report - August 20, 2014 C-16AGENDA ITEM C40 110 �y OF COCITY OF LODI Gam. d c �w rr COUNCIL COMMUNICATIONT11 AGENDA TITLE: Adopt Resolution Authorizing City Manager to Execute Amendment No. 1 to Task Order No. 26 and Task Order No. 27 with Langan Treadwell Rollo for Central Plume and Citywide Plume Management Services and Appropriating Funds ($65,450) MEETING DATE: PREPARED BY: August 20, 2014 Public Works Director RECOMMENDED ACTION: Adopt resolution authorizing City Manager to execute Amendment No. 1 to Task Order No. 26 and Task Order No. 27 with Langan Treadwell Rollo for Central Plume and Citywide plume management services and appropriating funds in the amount of $65,450. BACKGROUND INFORMATION: The Central Plume Source Area (CPSA) remediation activities include a groundwater extraction and treatment facility and a soil vapor extraction and treatment facility. The location of the facilities is provided in Attachment A. Both facilities began operations in April 2011 and continue to operate. The PCE mass removal from both facilities are exhibiting a significant reduction in removal rate as presented in Attachment B for the groundwater facility and Attachment C for the soil vapor facility. A variety of cleanup facilities have operated within the CPSA since 2003. The total mass removal from the CPSA, including the current facilities, is 17,507 pounds of PCE. Considering the decline in removal rate at groundwater and soil vapor facilities, a System Closure Work Plan was prepared by Langan Treadwell Rollo that was subsequently approved by the Central Valley Regional Water Quality Control Board (Water Board). The work plan establishes the following protocol for attaining system closure. 1. Demonstrate the PCE mass has been reduced and contained within the CPSA vadose zone and the groundwater. 2. Control the migration of contaminated groundwater downgradient of the CPSA. 3. Restore the beneficial uses of the groundwater. 4. Confirm the observed decreases are statistically significant. 5. Confirm system operations have sufficiently maximized PCE mass removal. 6. Perform rebound monitoring to substantiate complete shutdown of the system. The Water Board approval expanded the scope of the work plan as envisioned when Council approved Task Order No. 26. Langan Treadwell Rollo will now perform additional groundwater and vadose zone sampling as described in Task Order No. 26 Amendment No. 1 provided in Attachment D. The fee for the expanded scope of services is $40,450. In addition, staff requests approval of Langan Treadwell Rollo Task Order No. 27 in the amount of $25,000 for various services related to the coordination of efforts associated with the newly started monitoring APPROVED:`j4 4 Stephen SchvVabauer, City Manager K:\WP\PROJECTS\WATER\PCE,TC E\CTreadwellRollo_AmendTO26_27.doc 8/4/2014 1100 n s A CENTRAL PLUME 1 SOURCE AREA 1- b9 AC j4SQ ' Y �E Sr h A er a • ... x _ p- L. rp VINE. IN fs�it !Sg P1 k. "'ARK 6 f EA.RO�NALiI _ ST Percolalio PfS• Basin T Sewage - L)isX�sai f ' •� h ,gM7.'- +42 . 7CA'ML8INAN - Base map: Maptech, Inc., Terrain Navigator 2002 San Joaquin County No scale CENTRAL PLUME AREA CENTRAL PLUME Lodi,California SOURCE AREA LOCATION MAP LANGAN TREA17WELL ROLLD Date 01/16/14 Project No. 730392338 Figure 1 I � Mu^rcip4'y;r r = Mrsk+r)� SIa'�ffi rpw•�,„,,', � lra�ler 2, Park W II,;-. • e I I ��IIII �� j I ..•• • ath AFI T� �• �� - w r L 0111_ 1 lyof CAG1F ! FL if< _ �' sem:;•-�- I �`' ," 3ch Well 7 jl..i Sr 11 r' rAO 7 low wells \ Ll i A :mems I • • .. Mir .. I.:..i:� --r.:..: ,'Neil - L.�. ! E•..i i• No scale CENTRAL PLUME AREA CENTRAL PLUME Lodi,California SOURCE AREA LOCATION MAP LANGAN TREA17WELL ROLLD Date 01/16/14 Project No. 730392338 Figure 1 Figure 3 Groundwater Concentrations and Mass Removal Trends Central Plume Source Area Groundwater Extraction and Treatment System 2500 2000 J\ 00 c 1500 - 0 �v L V d 1000 — - - 0 u W U CL PCE Influent Concentration -4--EW-04 and EW -05 i F%ni_nr, 500 - - -- — 50 0 PCE Mass Removed --- - il�z i1�1 "0 1 11 '70 ��%� ,��i -10 Z1i Cumulative PCE Mass Removal and Volume Extracted 25 - - --- -- --- - - - -- --- - 50 PCE Mass Removed - - Groundwater Volume 45 0 4; 3 20.r—r OP 40 —m a 35 c c d E v15 f6 �. _.—.. -- ----� ��a+, --- ----- ---- - 30 X w _ � r - 25 u In 10 - - - / - - - - --�- -----_-- 20 a U / - 15 0 a a / > 5 10 > 3 / o S E U 0 0Sp u 10�1i 11;3�r' ili 101 Z�J lil Figure 4 Soil Vapor Concentrations and Mass Removal Trends Central Plume Source Area Soil Vapor Extraction System PCE Influent Concentration 30-- 25 E 20 a c 0 15 c a, u c UO 10 W U CL L� D: 1 1 1 1 1 p�1� i1�1p Cumulative PCE Mass Removal and Volume Extracted 3,500 - - _ _ - - -- - _.. 1,400 PCE Mass Removed 3,000 _Soil Vapor Volume 1,200 LZ C / 3 02,500 1,000 4 / u r 2,000 _ - - �. 1._ - - - g00 X X Ly W 61 n 1,500 - -- - - - - — _ - -- - - - - - - -- - --- 600 E o LU 400 > a / � 500 -- — - -- - — - - — --- - 200 E E u' 3 U 0 - _ - - - - - - -- _ ,... 0 i1�11 111 10�1/11 1�10�1/1�?o fi1�1Q AMENDMENT NO. 1 Langan Treadwell Rollo Technical Services Agreement Task Order No. 26 THIS AMENDMENT NO. 1 TO TECHNICAL SERVICES AGREEMENT TASK ORDER NO. 26, is made and entered this day of August, 2014, by and between the CITY OF LODI, a municipal corporation (hereinafter "CITY"), and LANGAN TREADWELL ROLLO (hereinafter "CONSULTANT'). WITNESSETH: 1. WHEREAS, CONSULTANT and CITY entered into a Technical Services Agreement (Agreement) on August 26, 2005, and into Task Order No. 26 on November 25, 2013, as set forth in Exhibit 1 (attached). 2. WHEREAS, CITY requested to amend said Agreement as set forth in Exhibit 2 (attached); and 3. WHEREAS, CONSULTANT agrees to said amendment; NOW, THEREFORE, the parties agree to amend the Scope of Services and Fee as set forth in the Agreement and Task Order No. 26 as Exhibits 1 and 2, respectively. IN WITNESS WHEREOF, CITY and CONSULTANT have executed this Amendment No. 1 to Task Order No. 26 on 12014. CITY OF LODI, a municipal corporation LANGAN TREADWELL ROLLO Hereinabove called "CITY' Hereinabove called "CONSULTANT' STEPHEN SCHWABAUER City Manager Attest: JENNIFER M. ROBISON, City Clerk Approved as to Form: JANICE D. MAGDICH City Attorney PHILIP G. SMITH Managing Principal TECHNICAL SERVICES AGREEMENT FOR PROFESSIONAL SERVICES BETWEEN LODI SOUTH CENTRALIWESTERN PLUME AREA COST SHARING AGREEMENT PARTICIPANTS AND TREADWELL & ROLLO, INC. THIS AGREEMENT, hereinafter referred to as "Agreement," is made and entered into on this 26 day of August 2005, by and between the Lodi South Central/Western Plume Area Cost Sharing Agreement Participants, hereinafter referred to as "Client," and Treadwell & Rollo, Inc., hereinafter referred to as "Consultant." The following are the Lodi South Central[Western Plume Area Cost Sharing Agreement Participants: James J. Babcock, Estate of Harry L. Bader, Marjorie F. Bader, Robert O. Bader, Michael Bollinger as Trustee of the Peter P. Bollinger Irrevocable Living Trust, Peter P. Bollinger, Peter P. Bollinger Investment Co., City of Lodi, Delano Gotelli, Harman Managers Investment Ltd., Victor Leonardini, Fred Lewis, Jeanne Lewis, Paul Mariani, Joseph K. Newfield, Judith L. Newfield, Michael Norris, Service Laundry & Dry Cleaners and Robert Spiekerman. WITNESSETH: WHEREAS, CIient is proceeding with participation in investigatory work in connection with PCE and TCE soil and groundwater contamination in the South Central/Western Plume Area in Lodi, which requires the services of a consultant; and WHEREAS, Consultant has available and offers to provide personnel and facilities necessary to accomplish such work as may be requested by Client; NOW, THEREFORE, Client and Consultant agree as follows: I. DESCRIPTION OF PROJECT Services provided shall be as described in Treadwell & Rollo's January 10, 2005 Proposed Workplan and Budget Estimate ("Workplan") attached as Ex. A, but in general shall include exploratory shallow groundwater investigation within the South CentraUWestern Plume Area. 11. SCOPE OF SERVICES Consultant agrees to perform those services described in the Workplan. Unless modified in writing by both parties, duties of Consultant shall not be construed to exceed those services specifically described in the Workplan. DL TIME FOR COMPLETION The time for completion of work shall be as identified in the Workplan. 8/24/2005 Exhibit 1 1V. COMPENSATION For services to be performed by Consultant, as described in the Workplan, Client agrees to pay, and Consultant agrees to accept, compensation as identified in the Workplan. Consultant shall invoice Client on a time and materials cost basis for services provided under this Agreement in accordance with the Billing Rate Schedule contained in Exhibit B. Consultant shall not invoice client for amounts in excess of the specified budget of $129,390 included in the Workplan. . Subject to Section XVIII of this agreement, Consultant may augment in-house personnel with subconsultants. Hourly rate for subconsultants shall not exceed those for equivalent in-house personnel. Consultant shall submit invoices for services as prescribed in each task order. Client shall pay such invoices within 30 days after their receipt. If payment is not made within 30 days, interest on the unpaid balance will accrue at a rate of one (1) percent per month compounded monthly. V. RESPONSIBILITY OF CONSULTANT Consultant agrees that in undertaking the duties to be performed hereunder, it shall act as an independent consultant for and on behalf of Client. Consultant shall be solely responsible for the compensation, benefits, contributions and taxes, if any, of its employees, agents and subcontractors. Client shall not direct the work and means for accomplishment of the services and work to be performed hereunder. Client, however, retains the right to require that work performed by Consultant meet specific standards without regard to the manner and means of accomplishment thereof. Consultant shall perform the Services in a manner consistent with the level of care and skill ordinarily exercised by consultants performing comparable services under comparable circumstances in the general location of the Project Site. Notwithstanding any provision of this Agreement, Consultant makes no representation, warranty or guarantee, express or implied, and expressly disclaims any representations, warranties or guarantees, whether made orally or in writing, and whether made prior to or contemporaneously herewith. VI. OWNERSHIP OF DOCUMENTS All documents and other materials obtained, prepared, or created by Consultant shall be owned by Client. Consultant shall have the right to retain copies of such materials. VII. NO THIRD PARTY RELIANCE Consultant and Client agree that all analyses, findings, conclusions and recommendations of Consultant made pursuant to this Agreement are for the sole benefit of Client and may not be relied on by any other person. VIII. INDENINIFICATION Consultant shall indemnify and hold harmless Client, their directors, officers, and employees from and against claims, damages, losses, and expenses (including reasonable attorneys' fees) whether 2 8/24/2005 incurred in a third party action or in an action brought by Client against Consultant , arising out of performance of the work, but only to the extent that any such claim, damage, loss, or expense is caused by (a) negligent acts or omissions of Consultant, any subconsultant employed directly by Consultant, anyone directly or indirectly employed by any of them, or anyone for whose acts they may be liable, or (b) consultant's material negligent or intentional breach or failure to perform any material provision of this Agreement. Client agrees to indemnify, defend and save harmless Consultant, its officers, agents and employees, and any subcontractors employed by Consultant incident to this Agreement, from and against all losses, claims, costs, damages, liabilities and other expenses, including reasonable attorneys' fees (whether incurred in a third party action or in an action brought by Consultant against Client to enforce Consultant's rights under this provision) arising out of (a) material breach or failure to perform any material provision of this Agreement by Client, or (b) the negligence, gross negligence, strict liability or willful misconduct of Client. IX. HEALTH AND SAFETY Client assumes all responsibility for the health and safety of all persons affected by the Project Site or the Services, except the Consultant and persons under the direct control, supervision, or direction of the Consultant. Consultant shall procure and maintain the following insurance policies, each of which shall provide primary coverage with respect to work performed under this Agreement. Comprehensive General Liability Insurance. Insurance including premises/operations, products/completed operations, blanket contractual, and broad -form property damage liability coverages. The combined single limit for bodily injury and property damage shall not be less than $1,000,000 per occurrence, and $2,000,000 per year in aggregate. 2. Automobile Bodily Injury and Property Damage Liability. Insurance covering owned (if any), non -owned, rented, and leased cars. The limit shall not be less than $1,000,000 per occurrence. Workers' Compensation and Employer's Liability. Insurance as prescribed by applicable law, including liability under the Longshoreman's and Harbor Workers' Act and the Jones Act, if applicable. The employer's liability limit shall not be less than $1,000,000. 4. Professional Liability Insurance. Insurance covering losses resulting from errors or omissions of the Consultant. The limit of liability shall not be less than $1,000,000 per claim and in the aggregate. Should Consultant or any of its officers, employees, or agents be found to have been negligent in the performing of professional services or work, or to have breached any express or implied 3 8/24/2005 warranty, breached any representation or any provision of this Agreement, Client, all persons or entities claiming through Client and all persons or entities claiming to have in any way relied upon or been damaged by Consultant's services or work agree that the maximum aggregate amount of the liability of Consultant, its officers, employees and agents shall be limited to the total amount of the fee paid to Consultant by Client for its work performed with respect to the project, or $500,000, whichever is greater. The Agreement price is predicated on this limitation of liability. Should Client object to this provision, then the Agreement price will be renegotiated by Consultant and Client to account for the increase in Consultant's potential liability. Any objection by Client to this limitation on liability must be conveyed to Consultant before Client's acceptance of this Agreement. 0 Jul RsI This Agreement is binding on the heirs, successors, and assigns of the parties hereto. This Agreement may not be assigned by either Client or Consultant without the prior written consent of the other. XII. BENEFIT Except as herein provided, this Agreement shall inure to the benefit of the assigns, heirs, and successors of the parties to this Agreement. XIQ. TERAMNATION Client may terminate this Agreement for its convenience. Consultant shall be compensated for work performed to the date of termination including a reasonable amount for profit on work accomplished and cost to terminate work. In the event Consultant shall persistently fail to perform services and work hereunder in a manner satisfactory to Client, this Agreement may, at Client's option, be terminated. Consultant shall be compensated for completed and useful work performed to the date of termination. Client or Consultant may terminate this Agreement at any time on 30 days prior written notice to the other parry. This Agreement shall terminate without any action of a party in the event either Client or Consultant becomes insolvent or subject to proceedings under any law relating to bankruptcy, insolvency or the relief of debtors. XIV. RIGHT OF INSPECTION AND AUDIT Client shall at reasonable times during the term of this Agreement have reasonable access to inspect and audit project -related documents and other materials resulting from Consultant's activities pursuant to this Agreement. Client shall reimburse Consultant for Consultant's reasonable costs in assisting with any such inspections and audits. 8/24/2005 XV. JURISDICTION This Agreement shall be administered and interpreted under the laws of the State of California. Jurisdiction of litigation arising from this Agreement shall be in California. If any part of this Agreement is found to conflict with applicable laws, such part shall be inoperative, null, and void insofar as it is in conflict with said laws, but the remainder of this Agreement shall be in full force and effect. No provision of this Agreement shall be construed for or against any party on the basis of its contribution, or lack of contribution, to the drafting of such provision, and the provisions of Section 1654 of the California Civil Code shall have no application to this Agreement. The failure of any party to enforce any provision of this Agreement shall not in any way be construed as a waiver of any such provision and shall not prevent that party from thereafter enforcing such or any other provision of this Agreement. XVI. NON-BINDING MEDIATION Any dispute or controversy between the parties relating to this Agreement shall be attempted to be resolved in good faith pursuant to non-binding mediation. The parties shall attempt to select the mediator by mutual agreement. If they are unable to do so within fifteen (15) calendar days from the date the dispute if first identified by the party first to assert a claim, the party first asserting one or more claims shall provide the other party with a written list of names of five (5) potential mediators. The other party shall either select the mediator from such list, or shall provide the other party with a written list of names of five (5) additional potential mediators. The mediator thereupon shall be selected from such list of ten (10) names by the parties alternately striking names from such list, the first party to strike a name being selected by the parties' flip of a coin. The last name remaining to be stricken from the list shall be the mediator. The parties shall proceed to resolve the dispute through non-binding mediation within forty-five (45) calendar days from the date of the mediator's selection, or such longer period as the parties may mutually agree upon. If the parties are unable to resolve the dispute by such means after making every reasonable effort to do so, the parties thereafter may pursue such other remedies as may be available to them under the provisions of this Agreement and pursuant to the laws of the State of California. The paragraph shall not apply to claims made by Consultant pursuant to Mechanics Lien laws. XVII. INTEGRATION This Agreement, including Exhibits, represents the entire understanding of Client and Consultant as to those matters contained herein. No prior oral or written understanding shall be of any force or effect with respect to those matters covered hereunder. This Agreement may not be modified or altered except in writing, signed by both parties. This Agreement may be signed in counterparts. XVIII. SUBCONTRACTS Except with prior written approval of Client, Consultant shall not enter into any subcontract with any other party for purposes of providing any work or services covered by this Agreement. 8/24/2005 XIX. NOTICES Any notice to a party in connection with this Agreement must be in writing and addressed to the party at its address as set forth in the attached as Exhibit C, or such other address or addresses as to which the parties may notify each other from time to time. Any notices made to Consultant shall be addressed to Consultant's project manager or principal in charge of the project described in the Workplan. All notices made hereunder shall be deemed effective on receipt. XX. AUTHORITY Each person signing this Agreement represents and warrants that he or she has been authorized to enter into this Agreement by the company or entity on whose behalf it is indicated that the person is signing. Philip T. Tringale Printed Name President Title Date CITY OF LODI Signature Blair Kin Printed Name City Manager Title =/Z-�o Date ved.as to form D. Stephen Schwabauer City Attorney ATTEST: Susan J. B City Clerk a/z41aoas Proposed Work Plan and Budget Estimate South CentraMestern Area Groundwater Investigation Lodi, California 10 January 2005 Exhibit A 8/31/2005 10 January 2005 Project 3923.09 Mr. Richard Prima Public Works Department City of Lodi 221 West Pine Street Lodi, California 95240 Subject: Proposed Work Plan and Budget Estimate South Central/Western Area Groundwater Investigation Lodi, California Dear Mr. Prima: Treadwell & Rollo, Inc. is pleased to submit this proposed Work Plan to conduct an exploratory shallow groundwater investigation within the South Central/Westem Area of Lodi, California (Figure 1). Soil gas and groundwater in the South Central/ Western ,Area has been impacted by tetrachloroethene (PCE), trichloroethene (TCE), and other halogenated volatile organic compounds (HVOCs); however, the extent and concentrations of these HVOCs are not well characterized. The proposed scope of work includes collecting groundwater samples to evaluate the lateral and vertical extent of HVOCs within the South Central/Western Area. This Work Plan was developed after the 5 October 2004 mediation session in Lodi, California, among the potentially responsible parties who may conduct a site investigation using a jointly retained contractor (Joint Contractor). The scope of work is based on the results of previous independent preliminary site assessments, historical document reviews, limited soil gas investigation results at potential source areas, and several grab groundwater samples collected in association with investigations evaluating the adjacent Central Plume Area. The previous investigation results have not provided sufficient data to determine where and to what degree contaminants are present. PURPOSE The objectives of the proposed work are described below: • Extent of contamination. The primary objective is to evaluate the potential lateral and vertical extent of HVOCs in groundwater. Potential source identification. Previous site assessments and preliminary soil gas and groundwater investigation results have suggested the potential for multiple sources within the South Central/Western Area. This Work Plan addresses potential HVOC sources contributing contaminants to the groundwater. Treadwell &Rollo, Inc. Environmental & Geotechnical Consultants 555 Montgomery Street, Suite 1300, San Francisco, California 94111 Telephone (415) 955-9040, Facsimile (415) 955-9041 Mr. Richard Prima Public Works Department 10 January 2005 Page 2 • Area geology — Assess the geology of the study area using cone penetrometer logs collected at each sampling location. BACKGROUND Subject Area Description The subject area has been referred to by several names including: The West Plume, the Western Plume, the Southwest Local Area, Lucky's Strip Center, and ASPI. For the purpose of this Work Plan, the subject area will be referred to as the South Central/Western Area (Figure 1). Known Extent of Impacted Soil Gas and Groundwater Soil Gas Several shallow soil gas investigations have been performed in and around the South - Central/Western Area (NERI, 1996; Montgomery Watson, 5 February 1997; and Henshaw, 29 June 2001). The focus of those soil gas investigations was limited to evaluating the extent of HVOCs in the immediate vicinity of former sewer laterals and drains at known or suspected HVOC sources. Therefore, the soil gas data does not fully characterize the entire South Cent-AVestern Area. The soil gas investigations detected the following HVOCs in the shallow (15 feet below ground surface) soil in the South Central/Western Area: • PCE Moderate to high ion counts (975,523 to 2,551,000) (NERI, 1995) 1.0 micrograms per kilogram (pg/kg) to 16 gg/kg (Montgomery Watson, 1997) 0.86 pg/kg to 4.4 pg/kg (Henshaw, 2001). • TCE Moderate to high ion counts (5,000 to 655,000) (NERI, 1995) • 1,1,1 TCA 1.4 gg/l (at 6 feet below the ground surface) (Montgomery. Watson, 1997) Based on these soil gas results, it appears that PCE and other HVOCs may have been released in the immediate vicinity of the former dry cleaning facilities. Groundwater Henshaw (2001). collected 11 grab groundwater samples from boreholes at depths ranging from 47 to 75 feet below the ground surface from within and downgradient (south-southwest) of the Mr. Richard Prima Tresdweffiftffo Public Works Department 10 January 2005 Page 3 South Central/Western Area. This depth interval corresponds to the shallow groundwater zone. Based on the detections of HVOCs (primarily PCE) in groundwater, the South Central/Westem Area groundwater may be impacted up to 3,000. feet southwest of the potential sources in or adjacent to the ASPI parcel, with the maximum concentration detected (2 10 micrograms per liter [gg/L]) about 350 feet downgradient. Geocon (1995), as part ofthe Texaco Service Station investigation at the southwestern corner of Hutchins Street and Lodi Avenue, detected concentrations of: • PCE in groundwater up to 13 pg/L; • 1,2 DCA in groundwater up to 41 gg/L; • TPHg in groundwater up to 250 µg/L; • TPHd in groundwater up to 190 pg/L; • MTBE in groundwater up to 610 µg/L. Based on the available shallow groundwater data, the lateral extent ofthe South Central/Westem Area HVOCs is not fully defined. Groundwater data has not been collected from the intermediate and deep groundwater zones beneath the South Cenh-k Western Area. Therefore, the vertical extent has not been defined. SCOPE OF WORK To meet the investigation objectives, shallow groundwater samples will be collected upgradient, adjacent to, and downgradient ofthe potential HVOC source areas, and throughout the study area. Lithologic logs will be obtained at each sampling location. The proposed tasks to implement the scope of work are as follows. Task 1- Planning The following planning and coordination activities for this scope of work are: • Obtaining encro4chment and drilling permits and site access agreements; • Coordinating with the drilling contractor and analytical laboratory; • Notifying nearby businesses and residents of drilling activities; Mr. Richard Prima Public Works Department 10 January 2005 Page 4 • Updating the site-specific health and safety plan; • Marking Iocations for Underground Service Alert (USA); • Coordinating with a utility locating service to clear all locations; • Coordinating temporary storage of waste soil and water. Because several of the proposed sampling locations are on private property, site access agreements will be required from the current property owners. Task 2 - Field Investigation For this initial groundwater investigation in the South Central/Western Area, shallow groundwater will be collected from 17 locations as shown on Figure 1. Prior to beginning groundwater sampling, two 100 -foot deep cone penetrometer tests (CPTs) will be performed for the purpose of collecting lithologic data. Depending on site access, we propose to complete these CPTs at locations WP -7 and WP -11. These locations were selected in order to collect data for developing a general site cross-section parallel to the anticipated groundwater flow direction and to identify laterally persistent saturated permeable soils that can be targeted for groundwater sampling. At each groundwater sampling location., CPT logs will also be generated prior to collecting groundwater samples. Grab groundwater samples will be collected from the shallow groundwater zone, which typically occurs between 45 and 75 feet bgs. Additionally, up to. 4 groundwater samples (including samples collected at WP -7 and WP -11) will be collected at approximately 100 feet bgs to examine deeper water bearing units. Exact sample depths will depend on the presence and thickness of sand layers, site conditions, and the initial CPT results. To collect grab groundwater samples from the boring, a hydropunch sampler will be advanced to the depth selected for sampling. Groundwater samples will be collected from the hydropunch sampler with a stainless- steel bailer and transferred into 40 -milliliter vials. Two groundwater samples will be collected from each boring to assess possible depth stratification that has been observed elsewhere in Lodi. One groundwater sample will also be collected from existing monitoring well MW -11. Sampling equipment will be retracted and decontaminated after collecting each sample. The groundwater samples will be submitted by the Joint Contractor under chain -of -custody protocol to. a California state -certified laboratory for analyses using US EPA Method 8260B. Groundwater samples will be analyzed on a standard 5 -day turnaround time (TAT). Waste generated during sampling will be stored in 55 -gallon drums and will be stored in a location designated by the City of Lodi Public Works Department. Waste will be characterized for appropriate disposal. R Mr. Richard Prima Public Works Department 10 January 2005 Page 5 We have included as an option the sampling of up to six additional CPTs. This task would be completed if the initial groundwater sampling results indicate additional data is needed to characterize the area, and would precede Task 3. The decision to collect additional samples will be made after consultation with the parties participating in this work. Task 3: Data Compilation and Report Preparation Upon completing the investigation, the Joint Contractor will compile the data and prepare a report presenting the investigation results. One copy of the report will be supplied to each Participant in the joint effort. The Joint Contractor will review the data collected in this investigation for its quality and comparability to previous results and will prepare data tables and maps to present current and previous results. The report will includethe following: • Introduction; • Investigation methods; • Evaluation of investigation results; • Recommendations, if warranted, for additional source and/or lateral and vertical extent investigation; • Tables presenting groundwater analytical results; • Figures showing the site location, sample locations, 1 VOC concentrations, boring Iogs, well construction diagrams and subsurface material cross section(s); and • Attachments with field sampling information and analytical laboratory reports. SCHEDULE Following is the proposed schedule for implementing these tasks. Task I —Planning 2 to 3 weeks Task 2 — Field Investigation 2 to 3 weeks Task 3 — Data Compilation and Report Preparation 4 to 6 weeks Mr. Richard Prima Public Works Department 10 January 2005 Page 6 The schedule is dependent on several factors including the availability of drilling rigs and the granting of access to private property. ESTIMATED COSTS On a time -and -expense basis in accordance with the City of Lodi terms and conditions, it is estimated that the cost will be as follows: Task1— Planning....................................................................... $17,250 Task 2 — Field Investigation....................................................... 66,140 Task 2A — Optional Additional field Investigation .................... 15,000 Task 3 — Data Compilation and Report Preparation ................... 31.000 TOTAL ............... a ..... ................ $129,390 The estimated costs include disposal of soil and water wastes generated during drilling. For disposal purposes, the property owner ofthe area from which samples are collected will be the designated generator. Sincerely yours, TREADWELL & ROLLO, INC. � c For David R. Kleesattel, RG Senior Geologist 39230902.PG5 Philip G. Smith, REA II Vice President Attachments: Figure 1 — South Ceutral/Western Area Shallow Groundwater Investigation cc: Margaret Dollbaum, Folger Levin & Kahn, LLP Billing Rate Schedule Position Principal Senior Associate Project Manager Senior Staff Scientist Graphics Technical Assistant Billing Rate (dollars per hour) 166.00 150.88 139.84 89.24 82.80 80.96 Exhibit B Direct expenses (telephone, reproduction, postage, etc.) will be billed at actual cost. Mileage will be billed at $0.35 per mile. Travel time will be included at the appropriate hourly rate either at 501/6 or one-way only. Subconsultants as approved by the City will be billed at actual cost plus 10%. EQUIPMENT CHARGES Vans, Trucks Nuclear Moisture -Density Guage Special Computer or Analytical Software Other Equipment 20068180021454623.1 $13.50,/hr (travel time plus time on site) $12.50/hr $30.00/hr As approved by City 8/31/2005 TreadweIEMlo A LAN6AN COMPANY 8 November 2013 Mr. Wally Sandelin Director — City of Lodi Public Works Department P.O. Box 3006 Lodi, CA 95241-1910 4�02(-roU) TechNCal Lice: -J C`. Pratt! -_'a! Subject: Proposed Scope of Work for Preparation of Work Plans and Program Management for the Central Plume Source Area System Closure and Northern Plume Monitoring Task Order No. 26 City of Lodi, California Dear Mr. Sandelin, As requested by the City of Lodi (City) in an email dated October 28, 2013, Treadwell & Rollo, a Langan company, has prepared the following Scope of Work (SOW) to develop the work plans and manage tasks associated with the following: 1. Shutdown of the Central Plume (CP) source area groundwater extraction and treatment system (GWETS) and soil vapor extraction (SVE) system; 2. Installation and operation of a new extraction well south of the CP source area and connected to the current GWETS to hydraulically contain, capture, and remediate the middle portion of the CP; and, 3. Obtain the Regional Water Quality Control Board (Water Board) approval for location of the proposed Northern Plume monitoring well. Task 26a - The work plan for the shutdown of the CPsource area SVE and GWET systems will assess the performance of the two systems in remediating the source area, and provide a step-by-step plan that will satisfy the requirements of the Water Board to attain closure of the two systems. We will evaluate options for full and phased shutdowns, and cycling of the SVE system, as needed. We anticipate that the Water Board will require the collection of soil gas samples from new locations in and around the CP source area, and will include this sampling in the work plan. Task 26b - This Task will include providing management and oversight during the closure activities associated with the SVE and GWET systems. Treadwell & Rollo will provide direction to the operator during the implementation of the closure activities for a phased or full shutdown of both the SVE and GWET systems. We have provided an estimate of potential costs associated with the collection and analysis of soil gas and groundwater samples needed to confirm the completeness of the remediation activities, assuming two days of field time to collect 6 soil gas samples. Following completion of the closure activities, Treadwell & Rollo will prepare a Final Closure Report for the CP source area remediation systems. Treadwell & Rollo will also discuss the results with the Water Board and provide assistance to the City to obtain the approval of the Water Board for the closure activities. Task 26c - The work plan for addressing the down -gradient groundwater contamination that has moved beyond the Central Plume source area remediation system capture zone will include the determination of the location of one extraction well, evaluation of the soil log to determine screen locations and optimizing the extraction rate of the well such that it can attain appropriate capture. Treadwell and Rollo proposes 555 Montgomery Street. Site 1300, San Francisco, CA 941.1 T: 415.955.5200 F; 415.955.5201 www.langan.corm ;f% . l,, a • ". [' g; a;'ia ,.,..'.E __ all . .C,...,.: • _ .,i..:..;c Dr^� • Dub • S( ^C.. Proposed Scope of Work for Preparation of Work Plans and Program Management 8 November 1013 for the Centra/ Plume Source Area System Closure & Assessment of Northem Plume Page 2 of3 Extent and Monitoring Task Order 26 City of Lodi, California to use the modified City of Lodi transient groundwater flow and contaminant transport model (Model) to meet the objectives of this task. Task 26d—A memorandum summarizing the Northern Plume hydrogeology and the proposed location of the NP monitoring point will be prepared and presented to the Water Board for their approval. Task 26d—As part of the Northern Plume monitoring well construction activities, Treadwell & Rollo will provide ongoing consultation on the location of the monitoring well screen intervals in conjunction with the Water Board. Costs associated with preparation of NP monitoring well installation work plan, well installation costs, and a report documenting final well installation activities are not included in this Task. Task 26f—Following completion of all the modeling activities, a follow-up meeting with the Water Board will be conducted to present the long-term plan for monitoring the NP. PROPOSEDSCHEDULE We are prepared to start work immediately. Task 26a can be completed with 30 days of notice to proceed, and Task 26c with 45 days.Task 26d will be completed within 60 days of notice to proceed. Remaining task schedules will be determined after discussion with the Water Board and the City. COSTSU M MARY We propose to perform the work on a time -and -expense basis in accordance with the terms of our City of Lodi Professional Services Agreement. We have estimated the following costs for Tasks 26a through 26e: Tasks Budget Task26a—Preparation of Work Plan for Closure of Source Area SVE and GWET Systems.......................................................................... $12,800 Task26b— Management of Closure of SVE & GWET Systems and Estimated Sol Gas Confirmation Sampling....................................................... 24,300 Task26c— Preparation of Work Plan for Installation of Central Plume Extraction Well............................................................................. 9,400 Task26d—Northern Plume Technical Memorandum/Presentation ............................ 5,600 Task26e—Management of Northern Plume Monitoring Well Activities ....................... 4,000 Task26f— Meetings (1 meeting)............................................................................ 3,600 TOTAL ESTIMATED COSTS .......................................... $S9,700 ThaIM)w A LAN6AN COMPANY Proposed Scope of Work for Preparation of Work Plans and Program Management B November2013 for (fie Central Plume Source Area System closure & Assessment of Nortfiem Plume Page 3 of 3 Extent and Monitoring Task Order 16 City of Lodi, Califomia We appreciate the opportunity to assist the City of Lodi. Please contact Mr. Oberoi at (415) 424-3009 or Mr. Smith at 415-955-5249 if you need any further information. Sincerely, Treadwell & Rollo, A Langan Company Varinder S. Oberoi, PE Principal Hydrologist 730377937.02 PGS—Proposal Philip G. Smith, REA II Executive Vice President ,w� D SWP . - City Attorney Date A LANSAN COMPANY LA/VGA/%/ TREAOWELL ROLLO 4 August 2014 Mr. Wally Sandelin Public Works Director City of Lodi 221 West Pine St. Lodi, CA 95240-1910 Subject: Task Order 26, Amendment No. 1 Lodi, California Langan Project: 730392338 Dear Mr. Sandelin; Exhibit 2 Technical Excellence Practical Experience Client Responsiveness We have received the approval of the Water Board (WB) to begin shut down and rebound monitoring of the Central Plume Source Area soil vapor extraction and groundwater extraction and treatment system (SVE/GWETS). This letter details the changes to the original (November 2013) Task Order 26 (TO 26) work assumptions, and presents the anticipated cost increases to address the amendments mandated by the WB. Requested Amendments to Task Order 26, Task 26b TO 26 was approved on 25 November 2013. The initial budget for Task 26b (Management and Closure of the SVE/GWETS) of TO 26 assumed the collection of six soil gas samples and a to - be -determined number of groundwater samples, management and oversight of closure activities, permitting, preparation of a Final Closure report, and meeting with the Water Board. These assumptions were the basis for the Task 26b estimate of $24,300. In the February 2014 work plan, additional tasks are described, including performing three monthly groundwater sampling events for seven wells and three monthly SVE well sampling event from wells that had been operating prior to shutdown, not specifying the number of wells. After the three months of rebound it was proposed to collect soil samples at three locations near MW -9 and confirmation soil vapor samples at up to five temporary locations, at two depths. A soil leaching model such as VLEACH or SESOIL would also be run, as needed, to determine whether residual contaminants in soil would potentially migrate to groundwater. The WB approved this approach on 9 April 2014, and asked for a written work plan for soil and soil vapor sampling by 15 May 2014. 555 Montgomery Street, Suite 1300 San Francisco, CA 94111 T. 415.955.5200 F: 415.955.5201 www.langan.com California • New Jersey • New York • Virginia • Washington, DC • Pennsylvania • Ohio • Connecticut • North Dakota • Florida - Abu Dhabi • Athens • Doha • Dubai • Istanbul Task Order 26, Amendment No. 1 4 August 2014 Lodi, California Page 2 of 3 Langan Proiect: 730392338 The work plan addendum dated 8 May 2014 specifies that confirmation soil vapor samples will be collected at up to five new locations and analyzed using TO -15. Soil samples will be taken at two locations with continuous core from 3 ft bgs to around 50-55 ft bgs and samples collected at 5 ft intervals and analyzed using EPA 8260. Specific sampling methods are detailed in the work plan. The WB approved the work plan addendum on 24 June 2014, and additionally specified that soil vapor samples should be collected at either deeper than 5 ft bgs or at 5 ft bgs and 15 feet bgs or greater. It is our recommendation that samples be collected at both 5 and 15 ft bgs to provide data to calculate potential indoor air risk and to better understand the effect of soil vapor concentration rebound. Based on the WB directives, the following tasks are required to complete Task 26b: • Collect and analyze an initial baseline round and three post -shutdown rounds of groundwater samples from one extraction well and seven monitoring wells (a total of 32 samples) plus eight field and trip blanks, for a total of 40 groundwater samples. Samples will be analyzed using EPA Method 8260. • Collect and analyze an initial base -line round and three post -shutdown rounds of soil vapor sampling from up to three soil vapor monitoring wells and up to nine soil vapor extraction wells (12 total wells), and eight trip and field blanks, for a total of 56 soil vapor samples. Samples will be analyzed using TO -15. • Install five temporary soil vapor wells and collect soil vapor samples from 5 and 15 ft bgs (a total of 10 samples), and analyze the samples using TO -15. Abandon the wells after the samples have been collected, per County and State guidance. • Collect soil samples from two locations, using continuous coring to the water table, assumed to be at 50-55 ft bgs. Collect soil samples at 5 -foot intervals (an estimated 10 per boring, for a total of 20 soil samples) and analyze using EPA Method 8260. • Model potential leaching of residual contaminants from soil to groundwater using SESOIL, VLEACH, or equivalent, as needed, after discussion of field sampling results with the WB. • Perform management and oversight of closure activities ■ Prepare a Final Closure report. • Meeting with Water Board following the preparation of Final Closure Report Stantec will collect the groundwater samples under their current contract with the City, amended to cover this work. Langan Treadwell Rollo (LTR) will collect and analyze the soil vapor extraction and monitoring well samples, install/sample/analyze/abandon the temporary soil vapor monitoring wells and soil borings, perform the leach modeling (if needed) and prepare the Final Closure report. As the scope of Task 26b has increased beyond the estimated scope LANGAN TREADWELL ROLLO Task Order 26, Amendment No. 1 Lodi, California Lancian Proiect: 730392338 4 August 2014 Page 3 of 3 on which the November 2013 budget was estimated, a budget revision will be required to complete the WB -approved work. Total estimated costs to perform the work, by task, are as follows: Tasks Estimated Cost 1. Collect and analyze four rounds of "rebound" soil vapor samples......................................................................................................... $21,750 2. Install and sample five temporary soil vapor monitoring wells and two soil borings..................................................................................... $24,000 3. If soil samples indicate contamination, perform soil leaching model $ 3,000 4. Permitting, utility clearance, and disposal costs ............................................. $ 2,900 5. Prepare expanded Final Closure report and manage additional work ............. $ 9,500 6. Meeting with the Water Board....................................................................... $ 3,600 The original Task 26B was budgeted for $24,300. Based on the above estimates, a budget increase of $40,420 for Task 26b is requested. We look forward to continuing our assistance to Lodi in the on-going groundwater monitoring and remediation programs. Please contact us with any questions. Sincerely yours, Langan Treadwell Rollo Varinder Oberoi Philip G. Smith Senior Project Manager Managing Principal 730392338.06 PGS LAIVGAN TREADWELL ROLLO LANGAN TREADWELL ROLLO 4 August 2014 Mr. Wally Sandelin Director -City of Lodi Public Works Department P.O. Box 3006 Lodi, CA 95241-1 91 0 Subject: Request for Approval of City -Wide Plume Management Task Task Order 27 City of Lodi, California Langan Project: 730392338 Dear Mr, Sandelin, Technical Excellence Practical Experience Client Responsiveness We are requesting the approval of a Task Order to provide environmental consulting to the City on the several groundwater contamination plumes that are currently in monitoring -only phases, and to address issues that may continue to arise and are not currently covered by active Task Orders. We are being asked by the various environmental contractors and the City staff to provide input to their work, and the new Task Order will provide a mechanism for us to continue this support. Our labor hours would be detailed on monthly invoices, and if greater than 2 hours were to be required for any task, prior authorization from the City would be requested. We request that a Task Order for $25,000 for on-going and future support be authorized. We appreciate the opportunity to continue to assist the City of Lodi. Please contact Mr. Oberoi at (415) 424-3009 or Mr. Smith at 415-955-5249 if you need any further information. Sincerely, Langan Treadwell Rollo Varinder S. Oberoi, PE Principal Hydrologist D. Stephen Schwabauer City Manager Philip G. Smith Executive Vice President Janice D. Magdich, City Attorney j Jennifer M. Robison Date City Clerk 730392337.07 PGS 555 Montgomery Street, Suite 1300 San Francisco, CA 94111 T. 415.955.5200 F; 415.955.5201 www.langan.com California • New Jersey • New York • Virginia • Washington, DC • Pennsylvania • Ohio • Connecticut • North Dakota • Florida - Abu Dhabi • Athens • Doha • Dubai • Istanbul 1. AA# 2. JV# �.T�.�,r-;ar. i r-_ - ti ` _•..I _ � If S!' •I _ _f-.>�i`—•' � I I��_��_ �- r, 4�. ..;- — l;- �u•� ..+rtr . �".�-•I'.'.: i'. '•' t i � ll�f� i; .I •.�_ �' 0 (;1 Il� S%��' � rt., �y'S ;'''�}7�ti 'i�r��s�� ; � ti i i` i �fE: i~ n r_.l i r � �i��,r �-4 ' • :' i'i-= ��- 1 ��r-- �. �i � � .► Internal Services Dept.Division .• '-.- DA 114. DEPARTMENT/DIVISION: Public Works I Please provide a description of the project, the total cost of the project, as well as justification for the requested adjustment. If you need more space, use an additional sheet and attach to this form. Task Order amendment 26 and Task Order 27 with Treadwell & Rollo If Council has authorized the appropriation adjustment, complete the following: Meeting Date: Res No: Attach copy of resolution to this form. Department Head Signature: Deputy City Manager/Internal Services Manager Date Submit completed form to the Budget Division with any required documentation. Final approval will be provided in electronic copy format. FUND # BUS. UNIT # ACCOUNT # ACCOUNT TITLE AMOUNT .A. SOURCE OF FINANCING 185 3205 Fund Balance $ 65 450.00 B. USE OF FINANCING 185 185127 7323 'Task 26 $ 40 450.00 185 185129 1 7323 Task 27 $ 25 000.00 Please provide a description of the project, the total cost of the project, as well as justification for the requested adjustment. If you need more space, use an additional sheet and attach to this form. Task Order amendment 26 and Task Order 27 with Treadwell & Rollo If Council has authorized the appropriation adjustment, complete the following: Meeting Date: Res No: Attach copy of resolution to this form. Department Head Signature: Deputy City Manager/Internal Services Manager Date Submit completed form to the Budget Division with any required documentation. Final approval will be provided in electronic copy format. RESOLUTION NO. 2014-155 A RESOLUTION OF THE LODI CITY COUNCIL AUTHORIZING THE CITY MANAGER TO EXECUTE AMENDMENT NO. 1 TO TASK ORDER NO. 26 AND TASK ORDER NO. 27 WITH LANGAN TREADWELL ROLLO, OF SAN FRANCISCO, FOR CENTRAL PLUME AND CITYWIDE PLUME MANAGEMENT AND FURTHER APPROPRIATING FUNDS WHEREAS, the Central Plume Source Area (CPSA) remediation activities include a groundwater extraction and treatment facility and a soil vapor extraction and treatment facility; the PCE mass removal from both facilities are exhibiting a significant reduction in removal rate; and WHEREAS, considering the decline in removal rate at groundwater and soil vapor facilities, a System Closure Work Plan was prepared by Langan Treadwell Rollo that was subsequently approved by the Central Valley Regional Water Quality Control Board (Water Board); and WHEREAS, Water Board approval expanded the scope of the work plan as envisioned when Council approved Task Order No. 26 to include performance of additional groundwater and vadose zone sampling as described in Task Order No. 26 Amendment No. 1; and WHEREAS, staff recommends approval of Langan Treadwell Rollo Task Order No. 27 for various services related to the coordination of efforts associated with the newly started monitoring activities within the Western Plume and Southern Plume by Stantec and the ongoing CPSA remediation operations by Diede Construction. NOW, THEREFORE, BE IT RESOLVED that the Lodi City Council does hereby authorize the City Manager to execute Amendment No. 1 to Task Order No. 26, in the amount of $40,450, and Task Order No. 27, in the amount of $25,000, with Langan Treadwell Rollo, of San Francisco, California, for Central Plume and Citywide plume management services; and BE IT FURTHER RESOLVED that funds be appropriated for the project from the PCE/TCE Rates account in the amount of $65,450. Dated: August 20, 2014 I hereby certify that Resolution No. 2014-155 was passed and adopted by the City Council of the City of Lodi in a regular meeting held August 20, 2014, by the following vote: AYES: COUNCIL MEMBERS — Hansen, Johnson, Mounce, Nakanishi, and Mayor Katzakian NOES: COUNCIL MEMBERS — None ABSENT: COUNCIL MEMBERS — None ABSTAIN: COUNCIL MEMBERS — None NIFER . ROBISON City Clerk 2014-155