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PUBLTC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY r' <br /> JOG[KHANNA M.D.,M.P.H. <br /> Health Officer �iig <br /> P <br /> P.O. Box 2009 • (1601 East Huchon Avenue) • Stockton, California 95201 <br /> (209) 468-3400 <br /> BOB VASQUEZ '-' `[ U <br /> SOUTHLAND CORPORATION <br /> 5820 STONERIDGE MALL ROAD SUITE 310 JUL Q 9 1993 <br /> PLEASANTON CA 94588 <br /> RE: 7-Eleven Store #2243-20304 SITE CODE. 1449 <br /> 455 West Grant Line Road <br /> Tracy CA 95376 <br /> San Joaquin County Public Health Services,Environmental Health Division(PHS/EHD)has completed review <br /> of the "Remedial Action Plan Addendum No. 2" dated April 30, 1993 and the "Extraction Well Installation <br /> Report" both prepared by Groundwater Technology. PHS/EHD has the following comments for your <br /> consideration. <br /> PHS/EHD requested,in correspondence dated February 17, 1993,that soil contamination be addressed in the <br /> Remedial Action Plan. The Addendum No.2 indicated that once groundwater extraction achieved sufficient <br /> dewatering,that a vapor extraction pilot test would be conducted. These test results would then be evaluated <br /> to determine if a vapor extraction system would provide effective soil remediation. The time line included in <br /> the Addendum scheduled the soil vapor pilot test for August 9, 1993. <br /> Additional soil contamination,at 8 and at 15 feet,was evidenced during the installation of the groundwater <br /> extraction well, GWE-I. Soil contamination in contact with the groundwater continues to provide a source <br /> of contamination to groundwater. <br /> The time line also indicated that a remedial action plan summary report would be submitted September 2, <br /> 1993. Within this report, the full extent of soil contamination should be presented in analytical tables and <br /> graphically on a site map. <br /> If you have any questions,comments,or wish to schedule a site inspection,please contact Mary Meays,Senior <br /> REHS, of my staff at (209) 468-0337. <br /> Jogi Khanna, M.D., M.P.H. <br /> Health Officer <br /> urie A. Cotulla, REHS, Program Manager <br /> Environmental Health Division <br /> LAC//MM <br /> M:Ib <br /> c: Elizabeth Thayer, CVRWQCB <br /> c: Al Ellis, Rishwain, Hakeem and Ellis <br /> c: Sandra Lindsey, Groundwater Technology <br /> A Division of San Joaquin county Heairh tare Services <br />