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• VICES OP4P.IN,.0 <br /> PUBLIC HEALTH SER <br /> SAN JOAQUIN COUNTY e ?� <br /> a: < <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer 4" <br /> P.O. Box 2009 0 (1601 East Hazelton Avenue) 0 Stockton, California 95201 <br /> (209) 468-3400 <br /> ZAIGA GIANINO <br /> UNION OIL COMPANY <br /> OF CALIFORNIA a IgQ� <br /> P 0 BOX 7600 <br /> LOS ANGELES CA 90051 <br /> RE: 437 E. Miner Ave. SITE CODE: 1181 <br /> Stockton, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has reviewed the <br /> "Tank Removal Observation Report" dated September 11, 1992 prepared by Geostrategies, Inc. for the <br /> above referenced site. <br /> Please submit receipts from the landfills that accepted the stockpiled soil from the site. <br /> The results of the "Waste Extraction Test" for lead performed on soil samples UT-1 and UT-4 collected <br /> below the former underground storage tank at this site indicate that lead may leach into the <br /> groundwater. In order to simulate natural site conditions and further investigate this possibility the <br /> "Waste Extraction Test" for lead should be performed using deionized water on soil samples. <br /> In addition, the levels of nickel evidenced in soil samples beneath both the waste oil tanks warrant <br /> further investigation. Soil samples beneath these tanks should be collected and analyzed using the <br /> "Waste Extraction Test". The extraction solution used in the "Waste Extraction Test" for nickel should be <br /> deionized water. <br /> Please submit a workplan by December 14, 1992 for further sampling of the areas discussed above. <br /> If you have any questions, contact Michael Collins, EHS, of my staff at (209) 468-0338. <br /> Jogi Khanna, M.P.H. <br /> Health Offic <br /> GdCf�Z� r <br /> �aurie A. Cotulla, REHS, Program Manager <br /> 1 Environmental Health Division <br /> ( LAC/MC:lb <br /> c: Geostrategies Inc. <br /> 2140 West Winton Ave. <br /> Hayward, CA 94545 <br /> A Division of San Joaquin Counry Health fibre Semces �� <br />