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TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> Quik Stop No-39 <br /> 2285 Fremont Street, Stockton, California <br /> total TOC GW <br /> Well TPHm TPHg B T E X MTBE DIPS ETBE TAME TBA meth eth DCA DBA Pb DTW elev elev <br /> Number Date (ug1L) (ug1L) (ug/L) (ug/L) (ug1L) (ug/L) (ug/L) (ug/L)(ug/L) (ug/L) (ug/I_) (ug/L) {ug/L) (ug/L) (ug/L) (ug/L) I(feet) (feet msl)(feet msl) Comments <br /> MW-4 11/30/04 na <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 na na <0.50 <0.50 na 54.25 21.53 -32.72 no odor/no sheen <br /> screened 02/18/05 na <60 <0.50 7.7 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 na na <0.50 <0.50 na 52.56 -31.03 no odorino sheen <br /> interval 05/13/05 na <50 <0.50 4.6 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 na na <0.50 <0.50 na 50.36 -28.83 no odor/no sheen <br /> 45'-65' <br /> MW-5 11/17/04 na <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 na na <0.50 <0.50 na 53.41 20.46 32.95 1 no odor/no sheen <br /> screened 02/18/05 na 52 <0.50 13 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 na na <0.50 <0.50 na 51.48 -31.02 no odor/no sheen <br /> interval 05/13/05 na <50 <0.50 9.2 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 na na <0.50 <0.50 na 49.35 -28.89 no odorino sheen <br /> 45'-65' <br /> MW-6 11/17/04 na <50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 na na <0.50 <0.50 na 54.38 21.35 -33.03 no odor/no sheen <br /> screened 02/18/05 na 68 <0.50 25 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 na na <0.50 <0.50 na 52.46 -31.11 no odorino sheen <br /> interval. 05/93/05 na <50 <0.50 9.4 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 na na <0.50 <0.50 na 50.30 -28.95 no odor/no sheen <br /> 45'-65' <br /> TPHm=total petroleum hydrocarbons as motor o MTBE=methyl tert-butyl ether DCA=1,2-dichloroethane <=less than indicated reporting limit <br /> TPHg=total petroleum hydrocarbons as gasoline DIPE=diisopropyl ether DBA=1,2-dibromoethane ns=not sampled <br /> B=benzene ETBE=ethyl tert-butyl ether total Pb=total lead nm=not measured <br /> T=toluene TAME=tert-amyl methyl ether '=soluble lead DTW=depth to groundwater <br /> E=ethylbenzene TBA=tert-butanol GW=groundwater <br /> X=total xylenes meth=methanol TOC=top of casing <br /> eth=ethanol elev=elevation <br /> msl=mean sea level <br /> 039gmr05' <br /> 7039.46 Page 1 HORIZON ENVIRONMEN .NC. <br />