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w <br /> TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> ARCO Service Station 0548 <br /> 1612 Hammer Lane <br /> Stockton, California <br /> (Page 3 of 3) <br /> Well/ Static <br /> Sample Elevation of Water Elevation of Ethyl- Total <br /> Number Date Top of Casing Level Groundwater TPH9 Benzene Toluene benzene Xylenes TOG Observations <br /> MW-6 <br /> MW-6(58) 12/16/93 8.95 42.77 -33.82 <50 <0.5 <0.5 <0.5 <0.5 NA No FP, No 5, No 0 <br /> MW-6(39) 04/08/94 8.95 39.73 -30.78 28 4.8 3.9 0.5 2.2 NS No FP, No S <br /> Method Blank 04/08/94 NM NM NM <50 <0.3 <0.3 <0.3 <0.5 NS NA <br /> Analytical results in parts per billion <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> TOG = Total oil grease <br /> Elevation datum is mean sea level <br /> Measurements in feet <br /> NS = Not sampled, NM = Not measured <br /> * = Well paved over on 03/04/93. <br /> ** = Raised MRL due to matrix interference. <br /> *** = The sample contains a lower boiling point hydrocarbon mixture quantified as gasoline; the chromatogram does not match the typical gasoline <br /> fingerprints. <br /> < = Below detection limit for analytical methods used <br /> N = Bailer blank <br /> FP = Free product, S = Sheen, 0 = Obvious product odor <br /> Sample designations: <br /> MW-4(34) - Well ID and sample depth (feet) <br /> W-24-MW3R - Water sample, sample depth (feet), R = rinsate blank* = Raised MRL due to high analyze concentration requiring sample dilution. <br /> 0429ccar/30004-11 <br />