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April 15, 1993 Working To Restore Nature <br /> t ARCO Facility No 6020, Manteca, California <br /> TABLE 3 <br /> HYDROCARBON CONCENTRATIONS IN'TE AMPLES <br /> COLLECTED FROM MONITORING LLS <br /> ARCO Service Station No 6020 <br /> 1711 Yosemite Avenue <br /> Manteca, California <br /> Sample Ethyl- Total <br /> I Number Date TPHg Benzene Toluene beivene Xylenes Nitrate <br /> W-23-MW-1 12/16/92 <50 <0 50 <0 50 <0 50 <0 50 1,200 <br /> W-24-MW-2 12/16/92 <50 <0 50 <0 50 <0 50 <0 50 NA <br /> W-22-MW-3 12/16/92 <50 <0 50 <0 50 <0 50 <0 50 1,100 <br /> W-21-MW-4 12/16/92 <50 <0 50 <0 50 <050 <0 50 5,100 <br /> I <br /> Results in parts per billionppb) <br /> TPHg = Total petroleum h arbons as gasoline <br /> < = Less than the detection limit for the analytical methods used <br /> NA = Analysis not requested <br /> Sample designation <br /> 1 W-23-MW-1 <br /> �-- Morutoiing well number <br /> Sample depth in feet below ground surface <br /> Water sample <br /> I <br /> 1 <br /> 1 <br /> r i 30055-5 <br />