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oe�ftt01D <br /> GAVIN NEWSOM <br /> GOVERNOR <br /> Ca I co R M IA JARED <br /> SECRETARRy FORNFELD <br /> Water Boards ENVIRONMENTAL PROTECTION <br /> Central Valley Regional Water Quality Control Board <br /> 3 August 2023 <br /> Joe Niland <br /> Lincoln Center Environmental Remediation Trust <br /> 3043 Gold Canal Drive, Suite 201 <br /> Rancho Cordova, CA 95670 <br /> REVIEW OF WELL DESTRUCTION WORK PLAN, LINCOLN VILLAGE SHOPPING <br /> CENTER, STOCKTON, SAN JOAQUIN COUNTY <br /> Central Valley Regional Water Quality Control Board (Central Valley Water Board) staff <br /> reviewed the 27 June 2023 Well Destruction Work Plan (Work Plan) prepared by <br /> Geosyntec on behalf of the Lincoln Center Environmental Remediation Trust (Trust) for the <br /> Lincoln Village Shopping Center in Stockton (Site). The Work Plan summarizes the <br /> rationale and approach for selection of wells that no longer benefit the project and can be <br /> destroyed. <br /> The Work Plan states there are over 100 piezometers, groundwater monitoring, extraction, <br /> injection, and other wells at the Site. The Trust is proposing to iteratively decommission <br /> wells at the Site that no longer provide a benefit in assessing the remedy. The Work Plan <br /> includes a decision tree to provide a framework for the process to evaluate the wells <br /> proposed for destruction. The wells proposed for destruction include: <br /> • 8 wells previously identified for destruction in 2020, <br /> • 10 piezometers near the edge of the plume, and <br /> • 22 wells previously used for Enhanced Reduction Dechlorination (ERD) injections. <br /> The Trust evaluated each of the 40 wells according to the decision tree and found that they <br /> met the following conditions: <br /> • Either redundant to another equivalent well; exhibited stable or decreasing <br /> concentrations for about two years; or damaged beyond repair. <br /> • Not needed to define the plume extent or boundary. <br /> • Not located within the current plume footprint (or treatment zone). <br /> • Not needed to evaluate remedy performance. <br /> • Does not provide groundwater flow information relevant to the remedy. <br /> • Well destruction does not impact nearby wells (nested/co-located wells) that are <br /> needed for assessment. <br /> KARL E. LONGLEY SCD, P.E., CHAIR I PATRICK PULUPA, ESQ., EXECUTIVE OFFICER <br /> 11020 Sun Center Drive#200, Rancho Cordova, CA 95670 1 www.waterboards.ca.gov/centralvalley <br />