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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING BP OIL COMPANY SERVICE STATION NO,11133 3202 WEST HAMMER LANE,STOCKTON,CALIFORNIA ALISTO PROJECT 1`40.10-136 WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-D TPH B T E X MTBE HVOC DO LAB ID SAMPLING! ELEVATION{a) WATER ELEVATION (b) (ugA) (ugA) (ugA) (ugA) (ugA) (u9A) (ugA) (u0 (ugA) (ppm) MONITORING (Feet) (Feet) )Fast) MW-5 04/25/94 4.38 17.40 -13.02 170 - 34 1.0 ND<0.5 8.1 -• -- 3.9 PACE MW-5 07/26!94 4.36 17.66 -13.48 1000 440 19 10 36 --- - 3.9 PACE QC-1 (d) 07128!94 -- --- -• 1200 --- --- 470 23 11 46 -- -- -- PACE MW-5 12!09194 4.38 16.34 -13.96 930 --- »• 260 5.3 31 21 -- 4.6 PACE QC-1 (d) 12/09/94 --- --- -» 1000 -- 280 5 34 24 - - -- PACE MW-5 03/03/95 438 16.99 •12.61 1200 --- -• 450 7.4 5.9 28 -- -- 5.4 ATI MW-5 04/12/95 4,38 15.71 -11.33 ND<50 --- 9.0 ND<0.50 2.6 1.5 --- --- 7.9 ATI MW-5 07/20795 4.38 16,00 -11.62 4100 (a) -- 220 ND<5.0 28 NO<10 »- - 6.7 ATI MW-5 11/02195 4.38 16.90 -12.52 220 -- -- 44 1.4 8.7 7.4 ND<5.0 -- 3.6 ATI MW-5 01/16196 4,38 16.27 -11.89 160 -- --- 47 3.0 13 11 NO<5.0 - - ATI MW-5 04122196 4.38 14.17 -9.79 100 --- --- 48 3 6 11 ND<10 -- -- SPL MW-5 07/12/96 4.38 14,46 -10.08 960 - - 320 3.8 78 42.2 31 - 2.9 SPL MW-5 11/14/96 4.38 15.36 -10.98 560 -• - 180 ND<1.0 49 17 19 - 3.1 SPL MW-5 03/11/97 4.38 12.42 -e-04 ND<50 --- -- 0.52 ND<1.0 ND<1.0 ND<1.0 ND<10 - 3.7 SPL MW-5 05/21/97 4.38 13.04 -8.66 60 »- --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 »- 4.9 SPL MW-6 04/25/94 3.56 16.73 -13.17 53 -- --- ND<0.5 ND<0.5 0.6 2.4 65 (c) - 2.0 PACE MW-6 07/28/94 3.56 17.20 -13.64 69 --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - 2.2 PACE MW46 12/09/94 3.56 17.70 -14.14 ND<50 - -- ND<0.5 ND<0.5 ND<0.6 ND<l -- - 3.5 PACE MW-6 03+03195 3.56 16.34 -12.78 ND<50 (ej --- --- 0.83 ND<0.50 ND<0.50 ND<1.0 -- -- 4.3 ATI MW-6 04/12/95 3.56 15,0$ -11.49 57 -- --- N04.50 0.52 ND<0.50 ND<1.0 --- -- 4.6 ATI MW-8 07/20/95 3.56 15.37 -11.61 ND<50 _ --- ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- --- 7.3 ATI MW-6 11/02/95 3.56 16.24 -12.68 ND<50 --- -- ND<0.5 N13<0.5 ND<0.5 ND<1.0 65 -- 4.3 ATI MW-6 01/16196 3.56 15.65 -12.09 ND<50 -•- -- ND<0.50 ND<0.50 ND<0.50 ND<1.0 89 - -- ATI MW-6 04/22796 3.56 13.53 -9.97 ND<50 -- -- ND<D.5 ND<l ND<l ND<l 58 -- -- SPL MW-6 07112!96 3.56 13.88 -10.29 ND<50 -- -- ND<0.5 ND<l ND<l ND<l 62 -- 3.3 SPL MW-6 11/14196 3.56 14.75 -11,19 60 -- - ND<0.5 ND<1.0 ND0.0 2.1 64 -- 3.9 SPL mW-6 03/11797 3.56 11,74 -8.18 120 -- --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 130 -- 3.9 SPL MW-6 05/22797 3.56 12.34 -8.78 100 --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 57 -- 3.7 SPL MW-7 04/25/94 4.46 17.59 -13.13 76 - --- 1.0 ND<0.5 ND<0.5 2.0 -- -- 4.7 PACE MW-7 07/28/94 4.46 18.06 -13.60 67 --- --- 6.8 ND<0.5 ND<0.5 ND<0.5 -- 4.6 PACE MW-7 42/09194 4.46 18.78 -14.32 57 --- -- 5.1 0.5 ND<0.5 ND<l -- -- 4.7 PACE MW-7 03/03'95 4.46 17.40 -12.94 ND<50 - » 5.8 ND<0,50 ND<0.50 ND<1,0 »- 4.3 ATI MW-7 04/12795 4.46 16.29 -11.83 ND<50 •» 4.6 ND<o.50 ND<040 ND<1.0 --- »- 7.8 ATI MW-7 07/20195 4.46 16.26 •11.80 ND<50 - -- 3.1 ND<0.50 ND<0.50 ND41.0 --- -- 5.3 ATI MW-7 11/02195 4.46 17.10 -12.64 ND<50 --- 3R ND<0.5 ND<0.5 ND<1,0 NO<5.0 -- 4.2 ATI MW-7 01/16796 4.46 16.44 -11.98 ND<50 - --- 4.6 ND<0.50 1413<0.50 ND<1.0 ND<5.0 - -- ATI MW-7 04/22/96 4.46 14.27 -9.81 ND<50 -- --- 2.0 ND<1 ND<l ND<l ND<10 -- -- SPL MW7 07/12/96 4.46 14.67 -10.21 ND<50 ••- -•- ND<0.5 ND<l ND<l ND<l ND<10 - 1.7 SPL MW-7 11/14196 4.46 15.60 -11.14 ND<50 --- --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 3.2 SPL MW-7 03/11197 4.46 12.55 -8.09 -- -- --- -- -- --- -- --- -- - -- MW-7 05/22797 4.46 13.19 -8.73 ... ... ... ... ... ___ ___ ___ ... ... 15-Jul-97 PAGE 3