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San Joaquin County DIRECTOR <br /> PQ i N Donna Heran,REHS <br /> o o Environmental Health Department ' ASSISTANT DIRECTOR <br /> 2 s2 600 East Main Street Laurie Cotulla,REHS <br /> { Stockton, California 95202-3029 <br /> s t; PROGRAM COORDINATORS <br /> .• r'• - Carl Borgman,REHS <br /> Mike Huggins,REHS,RDI <br /> NSP Website: www.sjgov.org/ehd Margaret Lagorio,REHS <br /> Phone: (209)468-3420 Robert McClellon,REHS <br /> Fax: (209) 464-0138 Jeff Carruesco,REHS,RDI <br /> Kat coley,RE , <br /> KELLY ESTERS d <br /> CHEVRON TEXACO ENVIRONMENTAL MANAGEMENT COMPANY <br /> P O BOX 6012, ROOM K2236 <br /> SAN RAMON CA 94583-0804 <br /> RE: Chevron Service Station 9-1452 <br /> 334 East Main Street <br /> Ripon, California <br /> San Joaquin County Environmental Health Department (EHD) has received and reviewed No <br /> Further Action Request dated July 19, 2007, prepared by Conestoga-Rovers & Associates (CRA) <br /> on your behalf for the above-referenced site pursuant to consideration for the site for regulatory <br /> closure. EHD interprets the current site data to justify a No Further Action Required consideration <br /> concerning investigation and remediation of the contamination from the former underground <br /> storage tanks and will discuss closure consideration for this site with the Central Valley Regional <br /> Water Quality Control Board(CVRWQCB)on September 19, 2007. <br /> Please note that the CVRWQCB is requiring evaluation of Environmental Screening Levels(ESLs), <br /> (San Francisco Bay Regional Water Quality Control Board), California Human Health Screening <br /> Levels (CHHSLs), and the potential for vapor intrusion into buildings for closure consideration of <br /> sites having residual contamination proposed to be left in place. Therefore, you need to evaluate <br /> the potential threat for vapor intrusion inside the buildings located onsite, the ESLs, and CHHSLs. <br /> Please submit a'vapor intrusion evaluation based on existing site data and the ESLs .and CHHSLs <br /> evaluations, or a work plan to EHD to assess the potential for vapor intrusion into the existing <br /> onsite buildings by November 5,2007. <br /> Should you have any questions or concerns regarding this letter, please contact Vicki McCartney at <br /> (209)468-9852,or by email at vmccartney@sjcehd.com. <br /> Donna Heran, REHS,Director <br /> Environmental Health Department - <br /> Victoria L. McCartney, Senior REHS Nuel C. Henderson,Jr.; PG `"L.. <br /> Unit IV-Site Mitigation Engineering Geologist <br /> Unit IV-Site Mitigation <br /> c: Michael D. Miller, PG -CRA <br /> I <br /> James L.L. Barton,PG CVRWQCB <br /> I <br /> I <br />