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SUMMARY OF GROUNDWATER MONITORING DATA <br /> First Owner im <br /> ARCO Service Station*548 <br /> 1612 Hammer Lane,Stockton <br /> (micrograms per.liter(µgA),unless noted) <br /> Floating <br /> Well ID Depth to Product <br /> and Sample Sampling Water Thickness Total TPH as <br /> Depth Date feet feet Benzene Toluene Eth lbenzene Xylenes Gasoline <br /> NiW-1* - -- - - -- - - -- <br /> MW-2(61) 3/4/93 45.46 -- <0.6** ND ND ND 51*** <br /> MW-3(62) 3/4193 45.43 -- ND ND ND 0.7 <140**** <br /> MWA(63) 314193 46.89 -- ND ND ND ND ND <br /> T?H=Total petroleum hydrocarbons <br /> ND=Not detected <br /> *-=This well was paved over on 3/4/93. EMCON returned on 3/10/93,and was instructed <br /> by RESNA personnel not to sample the well due to construction activities. <br /> Raised ML due to matrix interference. <br /> "^*=The sample contains a lower boiling point hydrocarbon mixture quantitated as gasoline. <br /> The chromatogram does not match the typical gasoline fingerprint. <br /> **=Raised MRL due to matrix interference. <br /> The sam le contains a high concentration of a non-fuel hydrocarbon, <br /> So mpl ing Wc.0G71-033.01 <br />