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0 310-329 10 Table 1 Summary of Results of Ground Water Sampling Chevron Service Station No 9-6465 5608 North Pershing Avenue, Stockton, California Concentrations in parts per billion (ppb) zaa w a r raw w-o w war z r a w a a w w w w azz r rar r n ss n wa a w r o z w u wsww w a aaw w aw a:w w as w a r za:r r:zr r s•-r r-w ra-w-----:--r n a-aa---------- WELL DATE OF CASING DEPTH GROUND TPH-G B T E X 1,2-DCA LAB ID SAMPLING/ ELEVATION TO WATER MONITORING WATER ELEVATION r--wwwrwwwa:w-wrwarrr-a-::-w-wwrrrrwszrraaaw::rrraea-rrr-w-rrrw-wars--w---a-z----z---w-wzww-swwrrwawrsswwrwrrrrwwazwsrzwrsz MW-10 03/19/90 7.41 --- --- --- --- --- --- --- --- NA MW-10 04/11/90 7.41 --- --- --- ND<0.3 ND<0.3 ND<0.3 ND<0.6 --- GTEL MW-10 05/09/90 7.41 35.38 -27.97 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.6 --- GTEL MW-10 10/22/90 7.41 37.35 -29.94 ND<50 1 1 ND<0.3 1 --- GTEL MW-10 01/19/91 7.41 37.50 -30.09 110 0.7 3 2 12 --- SAL MW-10 07/21/91 7.41 38.09 -30.68 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL MW-10 10/17/91 7.41 38.22 -30.81 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL MW-11 03/19/90 7.84 --- --- --- --- --- --- --- --- NA MW-11 04/11/90 7.84 --- --- --- ND<0.3 ND<0.3 ND<0.3 ND<0.6 --- GTEL MW-11 05/09/90 7.84 36.58 -28.74 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.6 --- GTEL MW-11 08/17/90 7.84 --- --- 83 0.5 ND<0.3 ND<0.3 ND<0 6 --- GTEL MW-11 10/22/90 7 84 --- --- --- --- --- --- --- --- NA MW-11 01/19/91 7.84 38.92 -31.08 140 1 4 2 17 --- SAL MW-11 07/21/91 7.84 39.57 -31.73 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL MW-11 10/17/91 7.84 39.77 -31.93 ND<50 ND<0.5 ND<0 5 ND<0.5 ND<0 5 --- SAL I RINSATE 03/23/89 NA NA NA ND<500 ND<0.5 NIX 0.5 ND<0.5 ND<0.5 --- SAL RINSATE 07/19/89 NA NA NA ND<500 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL RINSATE 07/14/90 NA NA NA ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0 6 --- GTEL RINSATE 10/22/90 NA NA NA ND<50 ND-c0 3 ND<0.3 ND<0.3 ND<0.6 --- GTEL RINSATE 01/19/91 NA NA NA NIX 50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL RINSATE 07/21/91 NA NA NA NIX50 ND<0.5 ND<0 5 ND<0.5 ND<0.5 --- SAL RINSATE 10/17/91 NA NA NA ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL 27-Nov-91 Page 6