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Canepa's Car Wash <br /> 248 East Park Street,Stockton,California <br /> Third Quarter Groundwater Monitoring Report,July 2005 <br /> Page 4 of 5 <br /> Table 2—Groundwater Laboratory Analytical Results (July 15,2005) <br /> Other <br /> B T E X TPH-G MTBE Oxygenates/ <br /> Additives <br /> Analytical Method—i• 8260B 8260B 8260B 8260B 8015M 8260B 8260E <br /> Reporting Units--+ µg/L pg/L, µg/L m/L mg/L µg/L pg/L <br /> Sample I D <br /> MW_I <0 5 <0 5 <0 5 <1 0 <0 05 10 <0 5 -<5 0 <br /> MW-2* 13 14 30 56 68 <5 0 <5 0-<50 <br /> MW-3 <05 <05 <05 <10 0370 16 <05 -60 <br /> MW-4 <05 <05 <05 <10 <005 08 <05 -<50 <br /> MW-5* 11,000 5,000 2,600 8,600 76 <100 <100-<1,000 <br /> MW-6 <05 <05 <05 <10 <005 30 <05-<50 <br /> MW-7 <0 5 <0 5 <0 5 <1 0 <0 05 1 1 <05 -<50 <br /> Units <br /> jig/[-=micrograms per liter=parts per billion(ppb) <br /> mg/L=milligrams per liter=parts per million(ppm) <br /> Constituent levels in bold indicate concentration levels above laboratory reportable limits <br /> Analytical <br /> B,T,E,X=benzene,toluene,ethyl benzene,total xylenes <br /> MTBE=Methyl tertiary-butyl ether <br /> • TPH-G=total petroleum hydrocarbons quantified as gasoline <br /> *=Sample diluted due to high concentration of target analytes and/or high organic content <br /> Other oxygenates/additives = tertiary-butanol (TBA), di-isopropyl ether (D1PE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether <br /> (TAME), 1,2-dichloroethane(1,2-DCA),and 1,2-dibromoethane(EDB) <br /> FUTURE WORK <br /> The next quarterly groundwater monitoring event is scheduled for October 2005 In the Additional Soil <br /> and Groundwater Investigation Report and Work Plan Addendum, dated July 12, 2004, Condor <br /> recommended and described the installation of five multi-screened, discreet depth monitor wells at the <br /> Site to further investigate the lateral and vertical extent of groundwater contamination Installation of the <br /> wells is pending the approval of the work plan addendum by the SJCEHD <br /> LIMITATIONS AND SIGNATURES <br /> This report was prepared under the direct supervision of a Professional Geologist in the State of <br /> California The standard of care for all services performed or furnished by Condor is commensurate with <br /> the care and skill ordinarily used by members of the environmental profession practicing under similar <br /> conditions at the same time in the same locality Condor is not responsible for the accuracy and <br /> completeness of information collected and developed by others <br /> • <br /> COhi DO R <br />