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34-355 Table 1 Summary of Results of Ground Water Sampling Chevron Service Station p 9-7780 3246 East Fremont Avenue. Stockton, California Concentrations in parts per billion (ppb) WELL DATE OF CASING DEPTH GROUND TPH-G $ T E X FC LAB ID SAMPLING/ ELEVATION TO WATER MONITORING WATER ELEVATION EA-4 02/11/88 25.73 45.63 -19.90 - --- '-` "- '-' NA EA-4 02/17/88 25.73 45.30 -19,117 --- --- --- --- --- NA EA-4 02/18/88 2:,).73 --- --- ND(50 ND(0.5 ND(1 0.2 0.4 --- NA E1j-4 04/08/88 25.73 46.23 -20.50 --- --- --- --- --- `-- NA EA-4 02/22/69 25.73 54.37 -28.64 --- - --- --- --- NA EA-4 03/22/89 25.73 54.66 -28.93 ND(250 ND<0.2 ND(0.2 ND(O.2 N00.2 --- NA EA-4 06/21/89 25.73 56.79 -31 .06 ND(250 ND(O.5 ND(O.5 ND(0.5 ND(O.5 --- NA EA-4** 09/21/89 25.73 --- --- --- --- --- --- --- NA EA-4** 12/18/89 25.73 --- --- --- --- --- --- `-- NA EA-4*9 03/22/90 25.73 --- --- --- - _-_ - _ ___ NA EA-4** 04/15/91 25.73 --- --- --- --- --- --- -`- --- NA EA-5 08/13/90 26.63 69.52 -42.89 --- --- --- --- --- --- NA EA-5 Oe/17/90 26.63 69.74 -43.11 ND(50 ND(O.5 ND(O.5 NO(0.5 ND(O.5 --- NA FA-5 04/15/91 26.63 75.49 -48.86 ND(50 ND(O.5 ND(O.5 ND(O.5 ND<0.5 PACE EA-6 Ori/13/90 25.97 66.90 -42.93 --- _-_ ___ --- _-_ --- NA EA-6 08/17/90 25.97 69.11 -43.14 N0(50 ND<0.5 ND(O.5 ND(O.5 ND(O.5 --- NA rA-6 04/15/91 25.97 74.82 -48.85 ND(50 ND(O.5 ND(O.5 ND(O.5 ND(O.5 ND(2 ! PACE LA-6D 04/15/91 25.97 74.82 -48.85 ND<50 NO(0.5 ND(O.5 ND(O.5 ND(O.5 --- 4 PACE IB 04/15/91 NA NA NA ND(50 ND(O.5 ND(O.5 ND(O.5 ND0.5, --- . PACE RINSATE 04/15/91 NA NA NA ND(50 ND<0.5 ND(0.5 ND(O.5 ND(O.5 --- PACE EXPLANATION OF ABBREVIATIONS- TPH-G Total Petroleum Hydrocarbons as Gasoline ND :Not Detected (EPA method eAlS modified) ND(2 :Fecal Coliform quantified in MPN/100 ml: B :Benzene (EPA method 8020 or 8240) most probable number of organisms per LOO mi of water. T :Toluene (EPA method 8020 or 8240) TO :Trip 81an1. E :Ethylbenzene (EPA method 8020 or 8240) D :Duplicate X :Xylenes (EPA method 8020 or A240) PACE =PACE Labs FC :Fecal Coliform x :Unable to locate well. --- :Not Analyzed/Not Measured «* :Not sampled due to insufficient NA :Nat Applicable/Not Available water in well Note= Top of casing and Ground Wate. Elevations are expressed as feet above mean sea level (NGVD-192Q). 24-May-vl i