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December 16, 1992 Working To Restore Nature <br /> Unocal Service Station No 6981, Stockton, California <br /> TABLE 7 <br /> HYDROCARBON CONCENTRATIONS IN GROUND-WATER SAMPLES <br /> Unocal Service Station No 6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> (page 1 of 4) <br /> Sample Ethyl- Total <br /> Number Date TPHg Benzene Toluene benzene Xylenes <br /> Monitoring Wells <br /> W-50-MWI 02/21/90 660 17 19 <0 50 056 <br /> 10/18/90 NS NS NS NS NS <br /> 11/19/90 NS NS NS NS NS <br /> 12/27/90 NS NS NS NS NS <br /> 01/28/91 NS NS NS NS NS <br /> 04/02/91 NS NS NS NS NS <br /> 07/18/91 NS NS NS NS NS <br /> 09/30/91 NS NS NS NS NS <br /> 11/14/91 NS NS NS NS NS <br /> 03/09/92 NS NS NS NS NS <br /> • 07/30/92 NS NS NS NS NS <br /> 09/08/92 NS NS NS NS NS <br /> 10/22/92 NS NS NS NS NS <br /> W-51-MW2 02/22/90 12,000 1,900 75 21 140 <br /> 10/18/90 NS NS NS NS NS <br /> 11/19/90 NS NS NS NS NS <br /> 12/27/90 NS NS NS NS NS <br /> 01/28/91 NS NS NS NS NS <br /> 04/02/91 NS NS NS NS NS <br /> 07/18/91 NS NS NS NS NS <br /> 09/30/91 NS NS NS NS NS <br /> 11/14/91 NS NS NS NS NS <br /> 03/09/92 NS NS NS NS NS <br /> 07/30/92 NS NS NS NS NS <br /> 09/08/92 NS NS NS NS NS <br /> 10/22/92 NS NS NS NS NS <br /> See notes on page 4 of 4 <br /> 38032-10 <br />