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IP—RZ, <br /> GAVIN NEWSOM <br /> GOVERNOR <br /> C0.LI i0 R LI I• JAIREo NFELD <br /> SECRETARRY FOR <br /> Water Boards ENVIRONMENTAL PROTECTION <br /> Central Valley Regional Water Quality Control Board <br /> 24 March 2022 <br /> Joshua Mills Via e-mail <br /> Area Environmental Manager <br /> Forward Landfill <br /> 9999 South Austin Road <br /> Manteca, CA 95336 <br /> REVIEW OF REVISED CDCR SITE INVESTIGATION AND REMEDIAL DESIGN <br /> WORKPLAN ADDENDUM, FORWARD INC. AND REPUBLIC SERVICES, <br /> FORWARD LANDFILL, SAN JOAQUIN COUNTY <br /> Forward Inc., a subsidiary of Republic Services (Discharger) owns and operates the <br /> Forward Landfill in San Joaquin County. Waste disposal operations, landfill closure, <br /> implementation of corrective actions and groundwater remediation at the Forward <br /> Landfill is regulated by Waste Discharge Requirements (WDRs) Order R5-2003-0080, <br /> R5-2014-0006 and Cleanup and Abatement Order (CAO) R5-2017-0703. <br /> Requirement 3.0 of the CAO requires the Discharger to submit an Interim Groundwater <br /> Plume Remediation System Workplan, which proposes the installation of additional <br /> groundwater extraction wells to remediate areas north of the landfill where the <br /> Discharger identified total VOC concentrations in groundwater exceeding 25 pg/I. The <br /> extraction wells shall be located near the center of plume mass and must be able to <br /> contain and treat the VOCs, create an inward gradient of the groundwater table, <br /> measured from existing monitoring wells within the plume, in all zones affected by the <br /> release. <br /> Areas north of the landfill were VOCs exceeded 25 pg/I included both Forward Landfill's <br /> property and the California Department of Corrections and Rehabilitation (CDCR) <br /> Regional Board staff previously reviewed and approved an Interim Groundwater <br /> Remediation Workplan on 3 August 2017 however do to access issues with CDCR the <br /> plan was not fully implemented. <br /> On 11 October 2019 the Discharger submitted a CDCR Investigation Workplan, which <br /> was approved by Board staff, with the understanding that the investigation was outside <br /> the scope of the CAO and the Discharger should install the previously approved <br /> groundwater extraction well prior to conducting the investigation (Regional Board letter <br /> dated 21 October 2019). <br /> Regional Board staff has reviewed the Revised CDCR Site Investigation and Remedial <br /> Design Workplan Addendum submitted on 7 March 2022. The Workplan proposes a <br /> multi-phase approach to 1). Install one groundwater extraction well into the shallow <br /> aquifer zone and two piezometers near existing groundwater monitoring wells AMW-22 <br /> MARK BRADFORD, CHAIR I PATRICK PULUPA, ESQ., EXECUTIVE OFFICER <br /> 11020 Sun Center Drive#200, Rancho Cordova, CA 95670 1 www.waterboards.ca.gov/centralvalley <br />