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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 4 of 4) <br /> Sample Ethyl- Total <br /> Number Date TPHg Benzene Toluene benzene Xylenes <br /> i <br /> W-54-MW10 08/19/92 <50 <05 <05 <05 <05 <br /> MW-10"' 10/22/92 <50 <05 <05 <05 <05 <br /> W-56-MWll 08/19/92 <50 <05 <05 <05 <05 <br /> MW-11" 10/22/92 <50 <05 <05 <05 <05 <br /> w-56-MW12 08/19/92 <50 <05 <05 <05 <05 <br /> MW-12" 10/22/92 <50 <05 <05 <05 <05 <br /> W-57-MW13 08/27/92 <50 <05 <05 <05 <05 <br /> . MW-13'• 10/22/92 <50 <05 <05 <05 <05 <br /> Pumping Test Well <0 5 <0 5 <0 5 <br /> W-55-PTWl 8/17/92 <50 <05 <br /> W-55-PTW 1 8/18/92 <50 <05 <05 <05 <05 <br /> W-56-PTWl 8/19/92 <50 <05 <05 <05 <05 <br /> W-0908-PTWl 09/08/92 69 <05 <05 <05 <05 <br /> Hydropunch Sampling <0 5 <0 5 <0 5 <0 5 <br /> W-62-MW12-HP 8/11/92 <50 <br /> HP-B16/MW-11 8/12/92 <50 <05 <05 <05 <05 <br /> HP-B15/MW10 8/13/92 <50 <05 <05 <05 <05 <br /> Baker Tank <0 5 <U 5 <br /> BT 8/19/92 <50 <05 <05 <br /> Results in parts per billion <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> NS = Not sampled <br /> The positive result for gasoline does not appear to have a typical gasoline pattern <br /> " = Sample collected by GeoStratigies Inc <br /> < = Below detection limit for analytical method used <br /> Sample designation well number <br /> W-56-MW-9 Water sample - sample depth (feet below grade) - <br /> HP-B16/MW-11 Hydropunch sample - boring number/well number <br /> so <br /> 38032-10 <br />