AGENDA TITLE:
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Adopt a Resolution Authorizing Interim City Manager to Execute Amendment No. 8 to Professional Services Agreement with Civil Hydro Tech, LLC, of Sunnyvale, for Lodi Central Plume Area, Northern Plume, and City-Wide Plume Management Services ($506,900), and Appropriating Funds ($506,900) (PW)
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MEETING DATE:
April 3, 2024
PREPARED BY:
Public Works Director
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RECOMMENDED ACTION:
Adopt a Resolution Authorizing Interim City Manager to Execute Amendment No. 8 to Professional Services Agreement with Civil Hydro Tech, LLC, of Sunnyvale, for Lodi Central Plume Area, Northern Plume, and City-Wide Plume Management Services ($506,900), and Appropriating Funds ($506,900)
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BACKGROUND INFORMATION:
Historical practices have resulted in the contamination of groundwater by tetrachloroethylene (PCE) and trichloroethylene (TCE) producing four identified groundwater contaminant plumes (Northern, Southern, Central and Western) within the City of Lodi. Efforts to monitor and remove PCE and related contaminants from the Central Plume Source Area ("CPSA") have been ongoing since 2003, utilizing both soil vapor extraction and groundwater extraction systems. To date, the clean-up efforts have removed treatment systems and have resulted in the removal over 20,000 pounds of PCE and TCE. In addition to the mandated clean-up efforts the Central Valley Regional Water Quality Control Board (Water Board) requires the City to monitor the migration of the contaminant plumes through a network of groundwater monitoring wells under the current Monitoring and Reporting Order R5-2018-0800 issued by the Water Board in January 11, 2018.
The current contract with Civil Hydro Tech, LLC ("CHT") is comprised of several amendments, with Amendment No. 6 and No. 7 outlined below to provide background and context for requesting approval of Amendment No. 8. Amendment No. 6 provided consulting and project management for ongoing investigation and remedia...
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