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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 DIPE ETBE TAME TBA meth eth DCA DBA Pb DTW elev elev <br /> Number Date1(uq1L)1(ug/L)1(ug1L) (u IL) ((ug/L u 1L u 1L u 1L u 1L (ug/L (ug/L (ug/L (ug/L (ug/L u 1L u 1L feet feet msl feet msl Comments <br /> MW-4 11130/04na <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 na na <0 50 <0 50 na 5425 2153 -3272 no odorino sheen <br /> screened 02/18/05 na <50 <0 50 77 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <50 na na <0 50 <0 50 na 5256 -3103 no odor/no sheen <br /> Interval <br /> 45'-65' <br /> I <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 5341 2046 -3295 no odorino 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 5148 -3102 no odor/no sheen <br /> interval <br /> 45-65' <br /> MW-6 11117/04 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 5438 2135 -3303 no odorino sheen <br /> screened 02/18105 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 5246 -31 11 no odor/no sheen <br /> interval <br /> 45'-65' <br /> TPHm=total petroleum hydrocarbons as motor oil MTBE=methyl tert-butyl ether DCA= 1 2-dichloroethane <=less than indicated reporting 1Urnd <br /> TPHg=total petroleum hydrocarbons as gasoline DIPE=dnsopropyl ether DBA= 1,2-dibromoethane ns=not sampled <br /> B=benzene ETRE=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 /> i <br /> I <br /> 039gmr05 As <br /> 703946 Page 4 of 4 HORIZON ENVIRONMENTAL INC <br />