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HomeMy WebLinkAboutAECOM Knapp Street Quarries & Timmerman LandfillAECOM Mr. James Rabe, PE, CPESC Director of Public Works City of Oshkosh 215 Church Avenue Oshkosh, WI 54901 RECEIVED JAN 15 2018 DEPT OF PUBLIC WORKS OSHKOSH, WISCONSIN AECOM 558 North Main Street Oshkosh, WI 54901 aecom.com January 15, 2018 AECOM Proposal No. OPP-708696 Proposal for Knapp Street Quarries and Timmerman Landfill Operations and Maintenance Support during the 2018 Calendar Year Dear Mr. Rabe, 13(A S AECOM Technical Services, Inc. (AECOM) has prepared this proposal for continued methane monitoring, sampling, landfill gas collection system operation and maintenance, and reporting at the former Faber Quarry and former Oshkosh Stone Company Quarry (collectively known as the Knapp Street Quarries) and groundwater and methane monitoring, sampling and reporting at the former Timmerman Landfill during the 2018 calendar year (CY2018). This proposal provides a summary of the specific project backgrounds, proposed scope of services and estimated costs for continued environmental monitoring at each site. Task 1 — Knapp Street Quarries Background The scope of services presented below is based on recommendations provided in the Operation Manual and in accordance with Wisconsin Department of Natural Resources (WDNR) Solid Waste requirements. The gas collection system was installed and started operation in 2010. AECOM personnel have continued monitoring the system and continually work at balancing the gas recovery. The system has had a positive influence on the reduction of methane gas and thus reduced the risk of methane gas migration off-site. At this time the monitoring points show methane concentration below 2.5% by volume. The WDNR has conditionally approved a plan toward reduced operation of the landfill gas extraction system. That plan requires that there is effective gas recovery when cycling the blower operations (6 -hours on and 4 -hours off) over a 4 -month period and following the closure of sections of vent piping that have had less than detectable readings for methane for a consecutive 12 -month period. This plan was initiated in 2015. Prior to and during the test period, system mechanical issues occurred that prolonged the testing program, which included: Replacement of the blower motor (twice, covered by warranty). Replacement of the exhaust stack (collapsed prior to the test commencing). Modifications to the grease tube operation to provide a constant temperature for the equipment. AECOM worked with a contractor to make the repairs and modifications. The testing was completed in September 2016. Based on the results of the reduced operation testing and with concurrence from the WDNR the active system is still required to control landfill gases. Another reduced operation test will be planned in the next 5 years to verify conditions at that time. In 2016, it was observed that several of the surrounding monitoring wells', located in sidewalk or parking lot pavement, flush -mount protective covers were no longer able to protect the integrity of the wells. This is likely due to age of the structures, damage from snow plowing and damage to the surrounding surface from freeze -thaw cycles (uneven grade). The repairs to the flush -mount protective covers will be completed in 2018 and 2019 if any savings to the proposed budgets are realized. C:\Users\crotteauk\Desktop\WORKING\OPP-708696_CY2018 Knapp St Timmerman Proposal.docx 1/7 AECOM In the summer of 2017, a WDNR Solid Waste Engineer inspected the site. AECOM and City Staff completed the site inspection with the WDNR representative. All items that were identified during this inspection were corrected by AECOM or City staff, and AECOM prepared a letter detailing the corrective actions and submitted it to the WDNR. Scope of Services Methane Gas Monitoring AECOM proposes to continue to conduct methane monitoring activities based on the schedule provided in the WDNR conditional approval letter dated April 15, 2014 and as presented in the chart below. Location Gas Monitoring Wells Identification OW -3, GW -12, GW -20, GW -20A, GW -22, GW -23, GW -23A, GW -24, GW -24A, GW -25, and GW -25A GW -2, GW -9, GW -10, GW -11, GW - 14, GW -17, and GW -19 Parameters Frequency Oxygen, methane, carbon dioxide, balance gas, groundwater level Monthly monitoring, vacuum Oxygen, methane, carbon dioxide, balance gas, groundwater level Quarterly monitoring Gas Extraction Wells WH -1 through WH -15 and VV -1 Oxygen, methane, carbon dioxide, through VV -9 Semi Annually 9 balance gas, vacuum Header Pipe at the Blower Station Blower (inflow) Vacuum before blower Monthly Vent Pipe Blower (discharge) Oxygen, methane, carbon dioxide, Monthly pressure after blower, velocity/flow Condensate Sample Point Condensate Sample Point Field pH, TBD If needed NOTES 1. At the time of monitoring the gas wells, gas extraction wells, header pipe at the blower station, and the discharge vent pipe, site conditions will be monitored for the following parameters: ambient air temperature, barometric pressure, trends in barometric pressure, ground surface conditions, type of meter used, and latest meter calibration date. 2. Monitoring has since been discontinued in the following gas monitoring wells: GW -1, GW -3, GW -4, GW -5, GW -6, GW -7, GW -8, GW -15, and GW -16 and the following observation wells, OW -1 and OW -2, which were abandoned. 3. WH -7 and VV -2 do not exist. At each gas monitoring well, and system sampling port the vacuum pressure, initial percent of the LEL of methane (percent LEL methane), percent methane gas (percent methane), percent oxygen (percent 02), percent of carbon monoxide (percent CO2), air flow (CFM), and groundwater levels will be measured. The LEL is the minimum concentration of a particular combustible gas or vapor necessary to support its combustion in air. The LEL of methane gas is 5% methane by volume. Observations (such as ground condition, barometric pressure, and monitoring well conditions) will also be recorded. After initial readings are recorded, monitoring wells will be purged with a pump at a rate of two liters per minute. Continuous percent LEL methane is to be measured as the well is purged. A final reading will be recorded when consecutive methane readings are within ±10% LEL. Final measurements include percent LEL methane, percent methane gas, percent CO2, and percent 02. The length of time required to achieve the final reading is typically unique to each well. Based on the 2017 WDNR site inspection, AECOM has added a checklist to be completed during each site visit. The checklist includes all items identified during the site inspection. If deficiencies are noted, AECOM staff will inform the City and develop and implement a solution. C:\Users\crotteauk\Desktop\WORKING\OPP-708696_CY2018 Knapp St Timmerman Proposal.docx 2n AECOM Schedule and Reporting Methane sampling and system O&M will be completed in accordance with the above schedule through December 2018. The monitoring data will be summarized and electronically submitted to the City and WDNR GEMS database on a semiannual basis. On an annual basis, a report will be submitted to the WDNR (including cover letter with discussion and conclusions). AECOM will immediately notify the City of any new methane wells that indicate an exceedance of the 25% LEL. Task 2 — Timmerman Landfill Background AECOM has been assisting the City with environmental services related to the Timmerman Landfill since 1978. These services have included groundwater and methane monitoring, landfill cap thickness verification, laboratory testing, data review, and closure planning. In response to the WDNR Notice of Violation dated August 2, 2006, AECOM completed a Site Assessment Report (SAR) in compliance with Wisconsin Administrative Code Section NR 700 and subsequently installed three additional groundwater monitoring wells. In 2008 and early 2009, AECOM completed the closure of the site under the WDNR Remediation and Redevelopment (RR) program and the site was transferred to the WDNR Solid Waste Program. In 2010, AECOM recommended the abandonment of six monitoring wells. The WDNR subsequently requested additional investigation regarding the presence of a passive methane collection trench, which AECOM completed using test pits. Based on the results of the test pit investigation and AECOM's recommendation in 2010, the WDNR approved the abandonment of the six wells and required the installation of two gas probes (in addition to the four already installed at the site) for additional methane monitoring in a letter dated February 2013. In the summer of 2017, a WDNR Solid Waste Engineer inspected the site. AECOM and City Staff completed the site inspection with the WDNR representative. All items that were identified during this inspection were corrected by AECOM or City staff, and AECOM prepared a letter detailing the corrective actions and submitted it to the WDNR. Scope of Services This proposal includes two rounds (semiannual) of groundwater monitoring, subcontract analytical laboratory services, and project reporting obligations through CY2018. In addition, landfill gas will be monitored quarterly and reported to the WDNR until approval to discontinue the methane monitoring and abandon the wells is achieved. AECOM submitted a gas monitoring reduction request in 2016. The request was subsequently denied by the WDNR as methane monitoring is required to be completed quarterly by Wisconsin Administrative Code NR 500. Groundwater samples will be collected according to the WDNR-approved monitoring requirements in the chart below: Location Parameters Frequency PZ -9, PZ -7, Alkalinity, Chloride, Hardness, Groundwater MW 1, PZ 4, PZ -5, MW -6, Elevation, field pH, field Temperature, field Semi-annually PZ -7D, MW -8, PZ-1,PZ-8, PZ -9, conductivity SQDMW-1, PZ -10 Volatile Organic Compounds (VOCs) Annuallv MW -9, MW -10 Groundwater elevation, field pH, field conductivity Semi -Annually VOCs Annually Groundwater monitoring wells will be purged prior to collecting the samples and field monitoring parameters. Gas monitoring points (GP -1 through GP -6) will be monitored quarterly for methane, oxygen, and carbon dioxide, per the methods described above under the Knapp Street Quarries Scope of Services, as required by the WDNR. Readings for barometric pressure, pressure trend, and temperature will also be collected during monitoring activities. C:\Users\crotteauk\Desktop\WORKING\OPP-708696_CY2018 Knapp St Timmerman Proposal.docx 3n AECOM Based on the 2017 WDNR site inspection, AECOM has added a checklist to be completed during each site visit. The checklist includes all items identified during the site inspection. If deficiencies are noted, AECOM staff will inform the City and develop and implement a solution. Schedule and Reporting Groundwater sampling will be completed twice annually (April and October), and gas monitoring will be completed on a quarterly basis (January, April, July, and October) through December 2018. The monitoring data will be summarized and electronically submitted to the City and WDNR on a semi-annual basis. Estimated Fees The following summarizes the proposed tasks and estimated fees: Task Task 1 — Knapp Street Quarries Fee Methane Monitoring and System Maintenance and Operation during CY2018 Includes H2O level meter, methane meter, CO2 and 02 meter and rental costs $39,500 WDNR Reporting, GEMS Database Updates, and Project Management $15,200 Task 1 Total $54,700 Task 2 — Timmerman Landfill Groundwater (2 events)/LFG Monitoring (4) Events) during CY2018 Includes H2O level meter, methane meter, CO2 and 02 meter rental costs $15,350 Subcontracted Laboratory $6,300 WDNR Reporting, GEMS Database Updates, and Project Management $6,400 Task 2 Total Total Project Fees $82,750 Future Services to be Combined Knapp Street Quarries and Timmerman Landfill We anticipate the installation, start-up, and operation of the Kienast and Paulus Quarry landfill gas collection system will occur in 2018. Startup, operation, and maintenance costs through 2018 associated with the Kienast and Paulus Quarry landfill gas system will be incorporated in the construction management agreement for that project. In 2019 these services are anticipated to be incorporated in the 2019 Landfill Operation and Maintenance Agreement. By combining these services on the multiple sites, AECOM anticipates there will be cost savings to the City during the operation and maintenance of these sites by effectively scheduling the work required consecutively and in a cost effective and timely manner. Terms and Conditions If services to be provided under this proposal require the agents, employees, or contractors of AECOM to enter onto the Project site, Client shall provide right -of -access to the site to AECOM, its employees, agents, and contractors, to conduct the planned field observations or services. The services described in this proposal will be provided on a time - and -material basis. AECOM will not exceed the above estimate without your authorization and approval. The services provided will be performed in accordance with the approved Fee schedule and with the conditions of the 2009 City of Oshkosh Negotiated General Conditions of Service, which are expressly incorporated into, and are an integral part of, our contract for professional services. C:\Users\crotteauk\Desktop\WORKING\OPP-708696_CY2018 Knapp St Timmerman Proposal.dou 4n A=COM To initiate this work, please sign and return the attached Authorization to the AECOM Oshkosh, Wisconsin office. Our understanding is that the City of Oshkosh will also issue a Purchase Order for all approved tasks. Please reference the AECOM proposal number, OPP-708696, in the Purchase Order that is forwarded to the AECOM Oshkosh Office. We are looking forward to working with you and providing assistance with this project. If you have any questions or need to clarify a point, please call any of the undersigned at 920-235-0270. Yours sincerely, AECOM Technical Services, Inc. �� Z&W I -- Cliff Cliff Shierk, P.E. Project Manager lid Kevin Brehm, P.E. Associate Vice President encl: Authorization 0J — Paul Timm '50kA,—J Account Manager C:\Users\crotteauk\Desktop\WORKING\OPP-708696_CY2018 Knapp St Timmerman Proposal.dou 5/7 A=COM 558 N Main Street Oshkosh, Wisocnsin 54901 920.236.6710 Authorization January 12, 2018 I hereby certify that the necessary provisions have been made to pay the liability, which will accrue under this contract. I hereby authorize AECOM to proceed with the scope of work Knapp Street Quarries and Timmerman Landfill Operations and Maintenance Support during 2018 Calendar Year as described in AECOM's proposal OPP-708696 dated January 12, 2018, with a budget authorization of $82,750 under the general terms and conditions specified in the proposal. Signature Mark A Rohloff Print Name City Manager Title/Organization --_ Signature Pamela R. Ubrig Print Name City Clerk Title/ ganization IA i tr Lynn A. Lorenson Print Name City Attorney Title/Organization Signature Trena Larson Print Name Director of Finance Title/Organization Date Date Date o► laq /is Date C:\Users\crotteauk\Desktop\WORKING\OPP-708696_CY2018 Knapp St Timmerman Proposal.docx 6/7 I agree to accept invoices from AECOM via e-mail and not postal mail: Yes Signature: E-mail address: Recipient Mr/Ms: Return to: Name: Cliff Shierk Address: 558 N. Main Street, Oshkosh, WI 54901 Phone: 920-236-6718 E-mail: Cliff.Shierk@aecom.com C:\Users\crotteauk\Desktop\WORKING\OPP-708696_CY2018 Knapp St Timmerman Proposal.docx 717