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• T461 • <br /> Page 5 of 5 <br /> Groundwater Monitoring Data <br /> ARCO Service Station No 548, 1612 Hammer Lane, Stockton, California <br /> Well Elevation Static Top Elevation <br /> Sample of Top Water of of Ethyl- Total <br /> Number Date of Casing Level Screen Groundwater TPHG Benzene Toluene benzene Xylenes MTBE Observations <br /> MW-6 (cont.) <br /> MW-6(59) 11/20/96 895 3457 -2562 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0 <br /> MW-6(57) 03/19/97 895 3083 -2188 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0 <br /> Analytical results in parts per billion <br /> HG-Total petroleum hydrocarbons as gasoline <br /> MTBE-Methyl tert-butylether <br /> Elevation dalton is mean sea level <br /> Measurements in feet <br /> NA-Not analyzed NM-Not measured. NE-Not evaluated <br /> *-Raised MRL due to matrix interference. <br /> **-The sample contains a lower boding pouit hydrocarbon mixture quantified as gasoline the chromatogram does not match the typical gasoline fingerprint <br /> *** Raised MRL due to lugh analyte concentration reguinng sample dilution <br /> Bailer blank FP-Free product S- Sheen O-Obvious product odor <br /> I <br /> -Below detection limits used by laboratory <br /> ample designations <br /> MW-4(34)-Well ID and sample de (feet) <br /> N\xls\0805\14007V041497M1 xis Revision 1 4/19197 <br />