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June 26, 1992 <br /> ARCO Service Station No. 549, Stockton, California <br /> TABLE 4 <br /> LABORATORY ANALYSES OF GROUND-WATER SAMPLES <br /> COLLECTED FROM MONITORING WELLS <br /> ARCO Service Station No. 548 <br /> 1612 Hammer Lane <br /> Stockton, California <br /> Sample Sample Ethyl- Total <br /> Number Date TPHg Benzene Toluene benzene Xylenes <br /> W-49-MW1 10-30-91 <50 2 . 1 <0. 5 <0.5 0.96 <br /> W-49-MW1* 10-30-91 <50 <0.5- <0. 5 <0.5 <0.5 <br /> W-49-MW2 10-30-91 <50 <0.5 <0. 5 <0. 5 <0.5 <br /> W-49-MW3 10-30-91 <50 <0. 5 <0. 5 <0. 5 <0.5 <br /> W-25-MW4 10-30-91 <50 <0. 5 <0. 5 <0.5 <0.5 <br /> Total oil and grease <br /> W-49-MW1 10-30-91 <5. 0 <br /> Results in parts per billion (ppb) <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> < = Less than the detection limit for the analytical <br /> methods used <br /> * = Bailer blank <br /> Sample designation: <br /> W-49-MW-1 <br /> Monitoring well number <br /> �—.— Sample depth in feet below ground surface <br /> Water sample <br /> r <br /> 30004-4 <br />