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Table* Hoof 5 - <br /> Groundwater Monitoring Data <br /> 1995 to Present <br /> ARCO Service Station No. 548, 1612 Hammer Lane, Stockton, California <br /> Well Elevation Static Top .Elevation Groundwater <br /> Sample of Top Water of of Flow Ethyl- Total <br /> Number Date of Casing Level Screen Groundwater Direction TPHG Benzene Toluene benzene Xylenes MTBE[11 Observations <br /> VW-4 (42) 09/29/98 ]NP] NM 2935 -- E 328 171 <0 5 110 612 2,560 No FP,No S,Yes 0 <br /> VW-4 (42) 12/30/98 [NP] NM 2720 -- SE 972 <0 5 0 562 <0 5 0 746 2,240 No FP,No S,No 0 <br /> VW-4 03/31/99 NM 2581 -- E-SE Not scheduled for sampling No FP,No S,No 0 <br /> VW-5S 12/30/98 NM Well not located Inaccessible because of soil stockpiles <br /> VW-5S 03/31/99 NM NM E-SE Not scheduled for sampling No FP,Yes S,Yes 0 <br /> VW-51) 12/30/98 NM Well not located Inaccessible because of soil stockpiles <br /> VW-5D 03/31/99 NM 2565 E-SE Not scheduled for sampling No FP,Yes S,Yes O <br /> lyrical results in parts per billion P=Purge <br /> HG-Total petroleum hydrocarbons as gasoline NP=No purge <br /> E-Methyl tert-butylether -Below detection limits used by laboratory <br /> Elevation datum is mean sea level [11 MT13E was analyzed using USEPA Method 8020 <br /> Measurements in feet. Sample designations <br /> I <br /> A-Not analyzed MW-4(34)-Well 1D and sample depth(feet) <br /> M-Not measured <br /> E-Not evaluated. <br /> *-Raised MRL due to matrix interference <br /> ** <br /> -The sample contains a lower boiling point hydrocarbon mixture quantified as gasoline,the chromatogram does not match the typical gasoline fingerprint <br /> ***-Raised MRL due to high analyte concentration requiring sample dilution <br /> Bailer blank <br /> Free product <br /> Sheen <br /> Obvious product odor <br /> I <br /> CP`E 1ARC0105481QTRLY10548Q 199 XLS �CKKRC� <br />