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Canepa's Car Wash <br /> 248 East Park Street,Stockton,California <br /> Fourth Quarter Groundwater Monitoring Report,October 2005 <br /> Page 4 of 5 <br /> • A summary of the laboratory analytical results for the current monitoring event is presented in Table 2, <br /> below Laboratory report sheets indicating analytical methods used, reporting limits, and the results of the <br /> analyses are included in Attachment D <br /> Table 2— Groundwater Laboratory Analytical Results (October 7,2005) <br /> Other <br /> B T E X TPH-G MTBE Oxygenates/ <br /> Additives <br /> Analytical Method-+ 8260B 8260B 8260B 8260B 8015M 8260B 8260B <br /> Reporting Units-+ µg/L µg/L }tg/L pg/L mg/L µg/L µg/L <br /> Sample T D <br /> MW-1 <0 5 <0 5 <0 5 <1 0 <0 05 <0 5 <0 5-<5 0 <br /> M W-2* 11 11 21 45 5 <5 0 <5 0-<50 <br /> MW-3 <05 <05 <05 <10 <005 10 <05-<50 <br /> MW-4 <0 5 <0 5 <0 5 <1 0 <0 05 06 0 6(1,2-DCA) <br /> MW-5* 10,000 1.,700 1,700 5,600 47 <100 <100-<1,000 <br /> MW-6 <05 <05 <05 <10 <005 22 <05-<50 <br /> MW-7 <05 <05 <05 <10 <005 09 <05-<50 <br /> Units <br /> • gg/L=mucrogmms per Mer=parts per billion(ppb) <br /> mg/L=milligrams per liter=parts per mullion(ppm) <br /> Constituent levels m bold indicate concentration levels above laboratory reportable lirruts <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 lugh concentration of target analytes and/or high organic content <br /> Other oxygenates/additives = tertiary-butanol (TBA), di-isopropyl ether(DIPE), 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 January 2006 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 Certified Hydrogeologist 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 /> t CONDOR <br />