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TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> Quik Stop No 039 <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 Date (ug1L) (ug1L) (ug1L) Lug/L) (ug1L) (ug1L) (ug1L) (ug1L)(ug1L) (ug/L) (ug/L) (ug1L) (ug1L) (ug1L) (uglL) (ug1L) (feet) (feet ms 1) (feet msl) Comments <br /> MW-3 12/15/99 na 360 <0 50 <0 50 <0 50 <0 50 <50 na na na na na na na 4408 2038 -2370 <br /> screened 05/19100 na 710 <0 50 <0 50 <0 50 <0 50 <50 na na na na na na na na na 4073 2035 no comment <br /> interval 08131100 na 480 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na na 4438 -2400 no comment <br /> 40'-60' 11102/00 na 310 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 26 <50 <5 0 160 <0 50 na 4483 2040 -2443 no odorino sheen <br /> 03/26101 na 270 <0 50 21 <0 50 54 <0 50 <0 50 <0 50 <0 50 23 na na na na na 4294 2254 no odor/no sheen <br /> 06/21/01 na 310 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 26 <50 <5 0 na na na 4424 -2384 no odor/no sheen <br /> 09/17/01 na 210 <0 50 1 5 <0 50 <0 50 <5 0 <5 0 na na na na na na na na 4749 -2709 no odor/no sheen <br /> 11/29/01 na 130 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 15 <50 <5 0 na na na 4755 2715 no odor/no sheen <br /> 02/18/02 <100 130 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 89 <50 <5 0 150 <0 50 68 4622 -2582 no odor/no sheen <br /> 05/02/02 <100 150 <0 50 052 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 15 <50 <50 130 <0 50 na 4602 2013 -2589 no odor/no sheen <br /> 08122/02 <100 210 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 19 na na 210 na na 4998 -2985 no odor/no sheen <br /> 11112/02 na 150 <0 50 <0 50 <0 50 1 1 <0 50 <0 50 <0 50 <0 50 12 na na 100 na <0 0050" 5082 -3069 no odor/no sheen <br /> 01/31/03 na 140 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 85 na na 100 na na 4917 -2904 no odor/no sheen <br /> I <br /> Notes TPHm=total petroleum hydrocarbons as motor oil MTBE=methyl tert-butyl ether DCA=1 2-dichloreethane <=less than indicated reporting limit <br /> TPHg=total petroleum hydrocarbons as gasoline DIPE=dusopropyl 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 /> i <br /> I <br /> 039gmr00 xls <br /> 703942 Page 2 of 2 HORIZON ENVIRONMENTAL INC <br />