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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 /> 11 August 2022 <br /> Ms. Brittany Steward <br /> Chevron Environmental Mr. and Mrs. Mandeep and Rudy Singh <br /> Management Company 2652 Cornflower Street <br /> 6101 Bollinger Canyon Road Stockton, CA 95212 <br /> San Ramon, CA 94583 <br /> MEETING SUMMARY AND REQUEST FOR WORK PLAN, <br /> TOSCO/UNOCAL #05643 AKA: #4409, <br /> 1502 NORTH EL DORADO STREET, STOCKTON, SAN JOAQUIN COUNTY <br /> Dear Ms. Steward, and Mr. and Mrs. Singh, <br /> On 15 June 2022, Central Valley Water Quality Control Board (Central Valley Water <br /> Board) staff met with your environmental consultant, GHD. The Tosco/Unocal #05643 <br /> AKA #4409 leaking underground storage tank case is located at 1502 North El Dorado <br /> Street in Stockton (Site). <br /> During the meeting, we agreed that additional lateral and vertical delineation of <br /> groundwater was needed to develop a site conceptual model that assesses the nature, <br /> extent, and mobility of the petroleum release. We agreed that a data gap exists in the B <br /> and C groundwater zones to the east-northeast of MW-23. We further agreed that GHD <br /> should submit a proposal to reduce the monitoring program and to submit additional <br /> construction and usage information on domestic well 10. <br /> By 15 November 2022, please submit a Work Plan presenting a scope of work for <br /> additional lateral and vertical delineation. The Work Plan should also include a <br /> proposed reduced groundwater monitoring program and additional construction and <br /> usage information for domestic well 10. <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 />