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Jason Cashman <br /> July 15, 2025 <br /> Page 2 of 2 <br /> • Sample for total petroleum hydrocarbons (TPH) at select wells at Site 49 Central <br /> Area, UST 817B Central Area, and Landfill Area to evaluate concentration <br /> trends. <br /> DTSC, with input from its Geological Services Branch (GSB), completed technical <br /> review of this revised document. DTSC has no comments and approves the Work Plan. <br /> Please notify DTSC 14 calendar days prior to starting field activities. If you would like to <br /> discuss this letter, please contact me at (916) 322-3430, or via email at <br /> Julie.Hernandez(a-dtsc.ca.gov. <br /> Sincerely, <br /> Julie Hernandez, P.G. <br /> Project Manager <br /> Military and Corrective Action Unit <br /> Site Mitigation and Restoration Program <br /> Department of Toxic Substances Control <br /> cc: (via email) <br /> Jeffrey Wingfield <br /> Deputy Port Director <br /> Port of Stockton <br /> J Wi ngfield(a-stockton Port.com <br /> Anju Wicke, Port Project Manager <br /> Geosyntec Consultants <br /> AWicke geosyntec.com; portofstockton(a-_)geosyntec.com <br /> Doug Bielskis. P.E. <br /> Geosyntec Consultants <br /> DBielskis(D-Geosyntec.com <br /> Walter Floyd, Project Manager <br /> Central Valley Water Board <br /> Walter.Floyd(c-)-Waterboards.ca.gov <br /> Duane White, P.E., Unit Chief <br /> Department of Toxic Substances Control <br /> Duane.White(c-dtsc.ca.gov <br />