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PUBLI! HEALTH SOVICES <br /> SAN JOAQUIN COUNTY c' Z <br /> ENVIRONMENTAL HEALTH DIVISION ` <br /> Karen Furst, M.D., M.P.H., Health Officer ..............;r <br /> 304 East Weber Avenue,Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> PAUL SUPPLE <br /> ARCO PRODUCTS COMPANY JAN 2 4 2002 <br /> P 0 BOX 6549 <br /> MORAGA CA 94570 <br /> RE: ARCO #6100 SITE CODE: 1708 <br /> 25775 Patterson Pass <br /> Tracy, CA <br /> San Joaquin County Environmental Health Department (EHD) has reviewed the <br /> "Notice of Station Upgrade Activities" dated January 7, 2002, prepared by Delta <br /> Environmental Consultants, Inc. The work proposed is approved with the <br /> following conditions: <br /> • Vapor well VW 12 is screened from 10 to 25 feet below surface grade <br /> which is different than VW3 and VW4 and there is shallow contamination <br /> in this area so VW 12 should be plumbed into the remediation system. <br /> • EHD has been informed by your consultant that VW15 is damaged. <br /> Vapor well VW15 is screened from 44 to 84 feet below surface grade <br /> which is different from VW 16 which is screened from 20 to 40 feet below <br /> surface grade and there is deeper contamination in this area. If VW 15 <br /> can be reconditioned it should be plumbed into the remediation system. If <br /> VW 15 is no longer of use then it should be destroyed. <br /> If you have any questions contact me at (209) 468-3449. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Margaret Laagorio, Supervising REHS <br /> Site Mitigation Unit <br /> c: Marty Hartzell — CVRWQCB <br /> Steve Carter— Delta Environmental <br /> A Division of San Joaquin County Health Care Services <br />