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PUBLIC HEALTH SERVICES ,oP .co <br /> SAN JOAQUIN COUNTY ENVIRONMENTAL HEALTHIVISIONKaren Furst, M.D., M.P.H., Health Officer.aj6i304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> REMO CANEPA SEP 0 7 2001 <br /> CANEPAS CAR WASH <br /> 1536 N HUNTER <br /> STOCKTON CA 95204 <br /> RE: CANEPA'S CAR WASH Site Code: 1148 <br /> 248 PARK STREET <br /> STOCKTON CA 95202 <br /> San Joaquin County Public Health Services Environmental Health Division(PHS/EHD)has received Q finer <br /> GramdzwterMaitmingReport-Aprd 2001 dated May 28,2001 prepared by Condor Earth Technologies,Inc. <br /> (CET). Depth to groundwater at the above-referenced site was approximately 23 feet below surface grade <br /> (bsg). The lowest recorded depth to groundwater in the general area was at approximately 70 feet to 75 feet <br /> bsg according to San Joaquin County Flood Control publication Lines of Equal Depth to Water in Wells for <br /> Fall 1978. Groundwater flow direction at the site has been predominantly northeast. The screen intervals for <br /> monitoring wells MW-1 to MWA are 45 feet to 65 feet below surface grade (bsg),and 40 feet to 60 feet bsg. <br /> Currently groundwater elevation is above all monitoring well screens and has been since 1995. Concentrations <br /> of petroleum hydrocarbons above the primary maximum contamination level(MCS.) for drinking water <br /> continued to be detected in groundwater samples collected from monitoring wells MW-5,MW-2,and MW-6 <br /> located at the edge of the property. <br /> The lateral and vertical extent of the groundwater contamination and the vertical extent of the soil <br /> contamination at the site have not been defined. PHS/EHD agrees with the statement made in the report that <br /> the detected contamination concentrations may not be accurate,and that additional investigation is required. <br /> Submit a work plan to PHS/EHD to define the lateral and vertical extent of the contamination in groundwater, <br /> and the vertical extent of the contamination in soil by October 20,2001. <br /> PHS/EHD also agrees with the report's recommendation for a 2,000-foot well receptor survey. Submit a <br /> 2,000-foot well receptor survey complete with addresses,map with the labeled locations of the wells,and any <br /> known well-construction details to PHS/EHD by November 10,2001. <br /> Please be aware that the Farmer's property(former Toyota Town) at 610 Hunter located to the south of your <br /> site is currently investigating the extent of UST-related groundwater contamination. It is unknown if the <br /> groundwater contamination plumes at your site and at Farmer's property are co-mingled. PHS/El-0 <br /> recommends you consider contacting Farmer's property owner and their consultant to determine if the plumes <br /> are co-mingled. Data from the investigation at Farmer's property may also aid you in your investigation and <br /> nrirumize potentially redundant work If the groundwater plumes are co-mingled,there is provision in the <br /> Clean Up Fund for reimbursement to responsible parties of co-mingled plumes. <br /> Donna Heran,RENS,Director <br /> Environmental Health Division <br /> Jeffre�Sr.RE HS !!� Dot Lofstrom,RG <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation,Unit IV <br /> c: RWCCB,Central Valley Region-Marry Hartzell <br /> c: Condor Earth Technologies-David Wood/Jeff Willett <br /> A Division of San Joaquin County Health Care Services <br />