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0 r <br /> Table 1 <br /> Groundwater Monitoring Data <br /> 1995 to Present <br /> ARCO Service Station No. 548, 1612 Hammer Lane, Stockton, California page 6 of 6 <br /> i <br /> Well Elevation Static Top Elevation Groundwater <br /> Sample of Top Water of of Flow Ethyl- Total <br /> Number Date ofCasmg Level Screen Groundwater Direction TPHG Benzene Toluene benzene Xylenes MTBE [11 Observations <br /> VW-5S 03/28/00 NM 1456 -- Not scheduled for sampling No FP,No S,O=NE <br /> VW-5D 12/30/98 NM Well not located Inaccessible because of soil stockpiles <br /> VW-513 03/31/99 NM 2565 -- E-SE Not scheduled for sampling No FP,Yes S,Yes O <br /> VW-5D 06/28/99 NM 2674 -- SE Not scheduled for sampling No FP,No S,O=NE <br /> VW-513 09/10/99 NM 2900 -- E Not scheduled for sampling No 1~P,No S,O=NE <br /> VW-5D 12/13/99 NM 2820 E Not scheduled for sampling No FP,No S,O=NE <br /> VW-513 03/28/00 NM 2497 SE Not scheduled for sampling No rP,No S,O=NE <br /> Analytical results in parts per billion F=Purge <br /> HG-Total petroleum hydrocarbons as gasoline NP=No purge <br /> MTBE-Methyl-tert-butylether <-Below detection limits used by laboratory <br /> evation datum is mean sea level [11 MTBE was analyzed using USEPA Method 8020 <br /> Measurements in feet Sample designations <br /> A-Not analyzed MW-4(34)-Well ID and sample depth(feet) <br /> -Not measured <br /> NE-Not evaluated <br /> '-Raised MRL due to matrix interference <br /> s«_The sample contains a lower boiling point hydrocarbon mature 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 /> FP-Free product <br /> S- Sheen <br /> O-Obvious product odor <br /> Sac1N1CamPMDatalAmhivelARCO1054810TRLY\0548g100 1T Corporation <br /> 515/00 <br />