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TABLE 1 <br /> GROUND-WATER MONITORING DATA <br /> ARCO Service Station No. 0548 <br /> 1612 Hamner Lane <br /> Stockton, California <br /> (Page 2 of 2) <br /> Bell/ Static <br /> Sample Elevation of hater Elevation of Ethyl- Total <br /> Number Date Top of Casing Level Ground Water TPHg Benzene Toluene benzene Xylenes Observations <br /> Mw-4 <br /> 11-25-Mw4 10/30/91 11.57 50.45 -38.88 <50 <0.50 <0.50 <0.50 <0.50 No FP, No S. No 0 <br /> MW-4(63) 03/18/92 11.57 47.24 -35.67 <50 <0.50 <0.50 <0.50 <0.50 No FP, No S, No 0 <br /> M41-4(63) 06/10/92 11.57 48.94 -37.37 <50 <0.50 <0.50 <0.50 <0.50 No FP, No S, No 0 <br /> M11-4(64) 09/04/92 11.57 50.65 -39.08 <50 <0.50 <0.50 <0.50 <0.50 No FP, No S, Yes 0 <br /> Mu-4(64) 12/04/92 11.57 49.73 -38.16 <50 <0.50 <0.50 <0.50 <0.50 No FP, No S, Yes 0 <br /> Analytical results in parts per billion (ppb) <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> Elevation datum is mean sea level <br /> Measurements in feet <br /> NS = Not sampled <br /> NM = Not measured <br /> < = Below detection limit for analytical methods used <br /> # = Bailer blank <br /> FP = Free product <br /> S = Sheen <br /> 0 = Obvious product odor <br /> * = Raised MRL due to high analyze concentration requiring sample dilution. <br /> �* = Raised MRL due to matrix interference. This sample contains single non-fuel component. <br /> *** = Sample contains lower boiling point hydrocarbon mixture quantified as gasoline; chromatograph does not match typical gasoline fingerprint. <br /> Sample designations: <br /> MU-4(34) dell ID and sample depth (feet) <br /> w-24-M113R Water sample, sample depth (feet), R = rinsate blank* = Raised MRL due to high analyze concentration requiring sample dilution. <br /> 0118ccar <br /> 30004-6 <br />