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ovm��ew�noruw <br />Water Boards <br />Central Valley Regional Water Quality Control Board <br />11 February 2022 <br />Michael N. Oliphant <br />Chevron Environmental Management Company <br />6001 Bollinger Canyon Road <br />San Ramon, CA 94583 <br />GAVIN NEWSOM <br />GOVERNOR <br />.TARED 13LUMENFELO <br />SECRETARY FOR <br />ENVIRONMENTAL PROTECTION <br />PROFESSIONAL SEAL FOR WORK PLAN AMENDMENT, CHEVRON FORMER <br />TRACY PUMP STATION, 1428 WEST GRANTLINE ROAD, TRACY, SAN JOAQUIN <br />COUNTY, GEOTRACKER CASE NO. SL0607707301 <br />On 24 August 2021, Arcadis U.S., Inc. (Arcadis) submitted the Work Plan Amendment <br />(Amendment) to Central Valley Regional Water Quality Control Board staff (Staff) on <br />behalf of Chevron Environmental Management Company (Chevron) for the subject site <br />(Site). The Amendment serves as a supplement to the Soil Investigation Work Plan <br />(Work Plan) dated 10 May 2013. <br />Staff provided a review of the Amendment in a letter dated 2 December 2021 stating <br />that the changes to the Work Plan described in the Amendment appeared to be <br />appropriate. Staff requested that Chevron re -submit the Amendment with the <br />seal/signature of a State of California licensed professional geologist or civil engineer as <br />required. On 16 December 2021, Arcadis re -submitted the Amendment with the seal <br />and signature of a State of California licensed professional engineer. <br />By 13 May 2022, please submit a soil investigation report. <br />If there are questions regarding this correspondence, please contact Brian Hitz at (559) <br />445-5170 or by email at Brian.Hitz@waterboards.ca.gov. <br />BRIAN HITZ <br />Engineering Geologist SHELTON R. GRAY <br />PG No. 9379 Senior Engineering Geologist <br />cc: San Joaquin County Environmental Health Department, Stockton <br />Christine Perez, Arcadis U.S., Inc., San Luis Obispo <br />DENISE KADARA, ACTING CHAIR I PATRICK PULUPA, EXECUTIVE OFFICER <br />1685 E Street, Fresno, CA 93706 1 www.waterboards.ca.gov/centralvalley <br />