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PUBLIC HEALTH SERVICES ,o <br /> auin, <br /> P1 <br /> SAN JOAQUIN COUNTY Q , �'-"' ?, <br /> ENVIRONMENTAL HEALTH DIVISION y R 7 <br /> • ' <br /> Karen Furst, M.D , MPH., Health Officer <br />' 304 East Weber Avenue, Third Floor • Stockton, CA 95202 A`'F0ft <br /> 2091468-3420 <br /> MEL BOKIDES PETROLEUM APR 2 6 2000 <br />' <br /> 265 CA-W TERBURY DR <br /> STOCKTON CA 95207-5807 <br /> Re Mel Bokides Petroleum Site Code 1200 <br /> 2191 Navy Dr <br /> Stockton, CA 95206 <br />' San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) <br /> has reviewed the Preliminary Investigation & Evaluation Report dated April 18, 2000 <br />' prepared by Advanced GeoEnvironmental, Inc for the above referenced site Soil and <br /> groundwater samples collected at this site evidence petroleum contamination Further site <br /> investigation is necessary to evaluate the groundwater condition and the vertical and <br /> lateral definition of contamination at this site <br /> The deepest sail sample collected at 15 feet below surface grade (bsg) in P3 evidenced <br /> 1 EDB at 6 2 parts per billion (ppb), MTBE at 70 ppb and TBA at 150 ppb A soil sample <br /> collected from 15 feet bsg in P5 evidenced MTBE at 170 ppb The vertical extent of <br /> Oxygenate contamination should be determined A deep bonng(s) below 15 feet bsg <br /> should be constructed near boring locations P3 and P5 Soil samples should be collected <br /> every 5 feet,below 15 feet bsg, until two consecutive soil samples are non detectaole for <br /> contaminants <br /> A work plan to further investigate the lateral and vertical extent of soil and -groundwater <br /> contamination at this site should be submitted to PHS/EHD by rune 26 2000 <br /> 1 <br /> Construct Monitoring Wells (MWs) at the site to evaluate the groundwater conditions and <br /> to establish the groundwater gradient MWs should be screened at an interval <br />' representative of the affected groundwater Groundwater samples should be analyzed <br /> quarterly for Total Petroleum Hydrocarbons (TPH) as gasoline, TPH as diesel by EPA <br /> Method 8015, Benzene, Toluene, Ethylbenzene and Xylene by EPA Method 8020 and <br /> Oxygenates, EDB, ethanol , methanol, and 1,2-DCA, by EPA Method 8260B Some <br /> laboratories can run a complete suite of petroleum constituents and fuel additives using <br /> EPA Method 8260B, thereby saving considerable cost Quarterly monitoring should <br /> continue until further direction from PHS/EHD <br />' Conduct a complete well survey of domestic, municipal, agricultural, industrial and any <br /> other wells within a 2,000-foot radius of this site. Contact the Department of Water <br /> • Resources, municipal water suppliers and nearby industries for well information <br />' Perform a physical search of the area to identify any wells Show the locations of all <br />' A Di%ision of San Joaquin County Heaith Care Ser%ices <br />