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ENVIRONMENTAL HEALTH DEPARTMENT <br /> Pau'" SAN JOAQUIN COUNTY <br /> Unit Supervisors <br /> Donna K.Heran,R.E.H.S. <br /> 304 East Weber Avenue, Third Floor .. Carl Borgman,R.E.H.S. <br /> y � =� Director <br /> Mike Huggins,R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> • .. y �a• Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. <br /> Robert McClellon,R.E.H.S. <br /> Program Manager Fax': (209) 464-01.38 Mark Barcellos,R.E.H.S. <br /> ULTRAMAR INC OCT 12002 <br /> 685 WEST THIRD STREET <br /> HANDFORD CA 93230 <br /> SAYED & ZAKIA ABDELWAHED <br /> 740 WEST OAK ST <br /> STOCKTON CA 95203 <br /> Re: ZE AUTO REPAIR <br /> 2255 SOUTH AIRPORT WY <br /> STOCKTON CA 95206 <br /> San Joaquin County Environmental Health Department (EHD) has received and reviewed <br /> Additional Subsurface Investigation Deport(report) dated September 5, 2002 prepared by <br /> Advanced GeoEnvironmental, Inc. (AGE). Analytical results of the grab water sample <br /> collected from Geoprobe boring P7 were 12,000,000 µg/l of Total Petroleum Hydrocarbon <br /> as gasoline (TPH-g), 60,000 µg/l of Benzene, 490,000 µg/l of Toluene, 310,000 µg/l of <br /> Ethylbenzene, and 1,890,000 Total Xylenes. The highest concentration of contamination <br /> identified in the analytical results of the the soil boring samples was 6,700 mg/kg of TPH-g <br /> from P7 at 45 feet below surface grade (bsg). <br /> Additional investigation to define the vertical and horizontal extent of the contamination in <br /> both soil and in groundwater is needed. You are also required to perform a well survey that <br /> will identified any potential well receptors within 2000 feet radius of the site. Submit a work <br /> plan that addresses these items to EHD by November 30,2002. <br /> Donna Heran,RENS,Director <br /> Environmental Health Division <br /> Jeffrey Wong, Senior RENS Nuel C. Henderson,Jr., RG <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit N <br /> Cc: CRWQCB,Central Valley Region--Marry Hartzell <br /> Cc: Advanced GeoEnvironmental, Inc. —Paul Dotson <br />