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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING BP OIL COMPANY SERVICE STATION NO.11193 3202 WEST HAMMER LANE,STOCKTON,CALIFORNIA ALISTO PROJECT NO.10-136 WELL DATE OF CASING DEPTHTO GROUNDWATER TPHG TPH-D TPH B T E x MTBE HVOC DO LAB ID SAMPLING/ ELEVATION (n) WATER ELEVATION (b) (ugA) (UA Wall) MAI (ugA) (ug4) (UA (UgA) (ugA) (ppm) MONITORING (Feet) (Feat) (Feet) 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 4.38 17.86 •13.48 1000 --- --- 440 19 10 38 -- --- 3.9 PACE OC-1 (c) 07/28/94 -- -- -- 1.2W -- 470 23 11 46 --- -- --- PACE MW-5 12109/94 4.38 18.34 -13.96 930 •-- ••- 260 5.3 31 21 -- -- 4.6 PACE 00-1 (c) 12/09/94 -- -- - 1000 -•• 280 6 34 24 -- -- -- PACE MW-5 03103!95 4.38 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-60 -- - 9.0 ND<0.50 2.6 1.5 --- -- 7.9 All MW-5 0712"S 4.38 16.00 -11.62 4100 -- -- 220 ND4.0 28 ND<10 -- --• 6.7 All MW-5 11/02/95 4.38 16.90 -12.52 220 --- -- 44 1.4 8.7 7.4 ND<5.0 •-- 3.6 All MW-5 01116/96 4.38 16.27 -11.69 160 47 3.0 13 11 ND<5.0 --- All MW-5 04/22/96 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 11/14196 4.38 15.36 -10.98 560 - 180 ND<1.0 49 17 19 --- 3.1 SPL MW-5 03111197 4.38 12.42 -8.04 ND<50 -- --- 0.52 ND<1.0 ND<1.0 ND<1.0 ND<10 --- 3.7 SPL MW-6 04125194 3.56 16.73 -13.17 53 --- --- ND<0.5 ND4.5 0.6 2.4 -- --- 2.0 PACE MW-6 07!26194 3.56 17.20 -13.64 69 --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- --- 2.2 PACE MW-6 12!09194 $.56 17.70 -14.14 ND<50 --- --- ND<0.5 ND<0.5 ND<0.5 ND<l --- --- 3.5 PACE MW-6 03/oW95 3.56 16.34 -12.78 ND<50 --- 0.83 ND<0.50 NDd1.60 ND<1.0 --- 4.3 ATI MW-6 04/12/95 3.56 15.05 -11,49 57 --- --- ND<0.50 4.52 ND<050 ND<1.0 --- --- 4.6 ATI MW-6 07120/95 3.56 15.37 •11.81 ND<50 --- --- ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- --- 7.3 ATI MW-6 11102/95 3.56 16.24 -12.68 ND<50 --- -- ND<0.5 ND<0.5 ND<0.5 ND<1.0 65 --- 4.3 ATI MW-6 01116M 3.56 15.85 •12.09 ND<50 -- - ND<0.50 ND<0.50 ND<0.50 ND<1.0 89 •-• --- ATI MW-6 04122/96 3.56 1353 -9,97 ND<50 -- - ND<0.5 ND<l ND<1 ND<l 58 --- •-- SPL MW-6 07112196 3.56 13.85 -10.29 ND<50 .-• -- ND<0.5 NO<l ND<t ND<l 62 --- 3.3 SPL MW-6 11114/96 3.56 14.75 -11.19 80 -- ND<0.5 ND<1.0 ND<1.0 2.1 64 --- 3.9 SPL MW-6 03/11/97 3.56 11.74 -8.18 120 -- --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 130 --- 3.9 SPL MW-7 04/25/94 4.46 17.59 -13.13 76 --- --- 1.0 ND<0.5 ND<0.5 2.0 -- --- Cl PACE MW-7 07/26/94 4.46 18.06 -13.60 67 --- --- 6.8 ND<0.5 ND<0.5 N0<0.5 - --• 4.6 PACE MW-7 12/09/94 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 04/12/95 4.46 16.29 -11.83 ND<50 -- --- 4.6 ND<0.50 ND<0.50 ND<1.0 -- -- 7.8 ATI MW-7 07/20/95 4.46 16.26 -11.80 ND<50 -- -- 3.1 NO<0.50 ND<0.50 ND<1.0 - --- 5.3 ATI MW-7 11/02/95 4.46 17.10 -12.64 ND<W --- -- 3.4 ND<0.5 ND<0.5 ND<1.0 ND<5.0 --- 4.2 ATI MW-7 01/16196 4.46 16.4 -11.98 ND<50 -• -- 4.6 ND<0.50 ND<0.50 ND<1.0 ND<5.0 --- -- AT] MW-7 0W22196 4.46 14.27 -9.81 ND<W --- --- 2.0 ND-1 ND<l ND<l NDa10 »- »- SP1. MW-7 07/12/36 4.46 14.67 -10.21 ND<50 -- ND<0.5 ND<l ND<l NO-1 NN10 -- 1.7 SP1. 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<t0 --- 3.2 SPI, MW-7 03111/97 4.46 12.55 -8.09 -- --• --- -- -- -- --- --- --- -- 18-Apr-97 PAGE 3