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~, FILE COPY <br /> PUBLIC HEALTH SERVIS <br /> d' �!N <br /> SAN JOAQUIN COUNTY Q ? <br /> ENVIRONMENTAL HEALTH DIVISION ` <br /> Karen Furst, M.D., M.P.H., Health Officer P <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> DEC 0 4 2000 <br /> ED RALSTON <br /> TOSCO MARKETING COMPANY <br /> 1380 LEAD HILL ROAD,SUITE 120 <br /> ROSEVILLE,CA 96661 <br /> RE: Tosco 76 Facility#5886 Site Code 1176 <br /> 2701 West March lane <br /> Stockton CA 95219 <br /> San Joaquin County Environmental Health Services,Environmental Health Division(PHS/EHD)has ! <br /> reviewed your letter dated November 21,2000. PHS/EHD approves of your plan to recommence weekly <br /> purging asan interim remediation measure. However,a modification of the sampling requirements is <br /> included in this letter. <br /> To assist in the calculation of mass removal, collect a groundwater sample fromtheUST cavity well and <br /> MW 3 immediately prior to purging,following purging,and from the vacuum truck for a total of three <br /> samples. Collect the three samples and submit them for laboratory analysis as described in your letter. Do <br /> this every week for a period of three weeks. After analytical results have been received for three sequential <br /> events,PHS/EHD will evaluate the data to determine if meaningful trends can be derived from the data. <br /> The deterrumation to cease or continue sampling will be made at.that time. <br /> If you have any questions regarding this directive,call Dot Lofstrom at(209)468-3436. <br /> Donna Heian,Director <br /> Enviviirroonmental Health Division <br /> OrL� <br /> Dot Lofstrom <br /> Unit IV Registered Geologist <br /> cc: Marty Hartzel,CVRWQCB <br /> Glenn Matteucci,Environmental Resolutions,Inc <br /> A Division of San Joaquin County Health Care Services <br />