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PUBL-iC HEALTH SlEkr ICES �p?�V�N•.,CO <br /> SAN JOAQUIN COUNTY <br /> JOGI KHANNA M.D.,M.P.H. °l _ <br /> Health Officer <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) Stockton,California 95201 <br /> C4�iFORa`P <br /> (209) 468-3400 <br /> July 20 , 1990 <br /> Alan N. Harvey, City Manager <br /> City of Stockton <br /> 425 N. E1 Dorado St. 00 F"y <br /> Stockton, CA <br /> RE: Knowles <br /> 1140 W. Hammer Lane <br /> Stockton, CA <br /> In response to your letter of July 12 , 1990, our staff has prepared <br /> a chronological site activity summary for the above referenced site <br /> commencing with the tank removal of March 5 , 1987 . <br /> In August, 1989 , the Knowles site was entered into the San Joaquin <br /> County Pilot Program for oversight of assessment and remediation <br /> activities at contaminated underground tank sites, now known as the <br /> Local Oversight Program. Prior to our Local Oversight Program lead <br /> regulatory responsibility for UGT contaminated sites was with the <br /> Central Valley Regional Water Quality Control Board (CVRWQCB) . <br /> Additional field investigations occurred in the fall, 1989 , and <br /> winter, 1990 . Sporadic laboratory results were submitted without <br /> benefit of geological interpretations, thereby, delaying proper <br /> evaluation of the site' s progress. The consultant retained by the <br /> Knowles family has proposed on-site treatment of the stockpiled <br /> soils which will enable replacement of the soil back into the pit. <br /> Approval of this on-site treatment is currently under review by the <br /> State Department of Health Services-Alternative Technology <br /> Division. <br /> We have provided written instruction to the Knowles family and <br /> their consultant to submit a summary report of the site' s <br /> activities to date and to include recommendations for the <br /> stockpiled soil remediation. The report will be submitted to oure <br /> office by August 31 , 1990- After our review of this report, <br /> will be better able to answer questions regarding "clean up" of <br /> this site. <br /> A Division of San Joaquin County Health Care Services <br />