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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING BP OIL COMPANY SERVICE STATION NO.11193 32W WEST HAMMER LANE,STOCKTON,CALIFORNIA , ALISTO PROJECT NO.1 o-136 WELL. DATE OF CASING DEPTHTO GROUNDWATER TPH-G TPH-D TPH B T E X MTBE H`/OC DO LAB ID SAMPLING! ELEVATION(a) WATER ELEVATION (b) 09A) (ugA) (ugA} (uo) (ugA) (ugA) (ugA) (ug4) (ugA) {ppm} MONITORING (Feet) (Feet} (Feet) MW-5 04!25/34 4,38 17.40 -13.02 170 - 341.0 ND<0.5 8.1 -- - 3.9 PACE MW-5 07/28/94 4.38 17.86 -13.48 1000 •- - 440 19 10 38 -- 3.9 PACE CC-1 (d) 07128/94 -- -- 12W --- -- 470 23 1146 -- - - PACE MW-5 12109/94 4.38 18.34 -13.96 930 --- -- 260 5.3 31 21 - - 4.6 PACE QGl (d) 12/09/94 - -- 1000 --- --- 280 6 34 24 - - --- PACE MN-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<50 --- --- 9.0 ND<0.50 2.6 1.5 -- - 7.9 ATI MW-5 07!20/95 4.38 16.00 -11.62 4100 (e) --- 220 ND<5.0 28 ND<l0 - - 6.7 ATI MW-5 11/72/95 4,38 16.90 -12.52 220 - 44 1.4 8,7 7.4 ND<5.0 3.6 ATI MW-5 01/16/96 4.36 16.27 -11.89 160 -- 47 3.0 13 11 ND<6.0 -- -- ATI MW-5 04/22!96 4.38 14.17 -9.79 100 -- 48 3 8 11 ND<10 -- -- SPL MW-5 07/12196 4.36 14.46 -10.08 960 - -- 320 3.8 78 422 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 03/11/97 4.38 12.42 -8.04 ND<W --- --- O52 ND<1.0 ND<1.0 ND<1.0 ND<10 - 3.7 SPL MW-5 05/22/97 4,38 13.04 -8.68 60 -- - ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<lo -- 4.9 SPL MW-5 08106/97 4.38 13.90 -9.52 -- --- --- --- --- --- -- - 6.2 - MW-5 D9/22197 4.38 13.99 -9.61 ND<50 --- --- ND<0.5 ND<i.o ND<1.0 ND<1.0 N0<10 - 7.0 SPL QC-1 (d) 09I2MKJ7 --- -- --- ND<50 ND<0.5 ND<1.0 ND<1.0 ND<1,0 ND<10 - SPL MW-6 04125/94 3.56 16.73 -13.17 53 --- --- 1\10<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<D.5 - -- 2.2 PACE MW-6 12!09194 3,56 17.70 -14.14 ND<50 --- - N0<0.5 NDcD.5 ND4.5 ND<l - -- 3.5 PACE MW-6 03103/95 3.56 16.34 -12.78 ND<50 (s) - 0.83 ND<0.50 ND<0.50 ND<l.O - -• 4.3 All MW-6 04/12/95 3.56 15.05 -11.49 57 - -- ND<0.50 0.52 ND<0.50 ND<tO - -- 4.6 ATI MW-6 07/20/95 3.56 15.37 -11.81 ND<50 -- ND<0.50 ND<0.50 ND4.50 ND<1.0 -- - 7.3 All MW-6 11/02/95 3.56 16,24 -12.68 NO<50 --- --- ND<0.5 ND<0.5 ND<0.5 ND<1.0 65 -- 4.3 ATI MW-6 01/16/96 3.56 15,65 -12.09 ND<50 ••• -- ND<0.50 ND<0.50 ND<0.50 ND<1.0 89 - - RTI MW-6 04/22/96 356 13.53 -9.97 ND<50 --- - ND<0.5 ND<l ND<l ND<l 56 »- SPL MW-6 07/12/96 3.56 13.85 -10.29 ND<W --- --- ND<0.5 ND<l ND<l ND<l 62 -- 3.3 SPL MN-6 11/14/96 3.56 14.75 -11.19 80 - --- ND<0.5 ND<l.0 ND<1.0 2.1 64 - 3.9 SPL MW-6 0311107 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 05/22197 3,56 12.34 -8.78 100 --- -- ND<0.5 ND<1.0 ND<1.0 ND<1.0 57 -- 3.7 SPL MW-6 O8/O6/97 3.56 13.20 •9.64 - ___ ___ ___ __ - 6.2 MW-(i 09/27197 3.56 13.31 -9.75 ND<W - ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 6.3 SPL MW-7 04125/34 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<015 ND<0.5 »- 4,6 PACE MW-7 12109/94 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<o.50 ND<0.50 ND<1.0 -- 4.3 ATI MW-7 04112/95 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 ND<0.50 ND<0.50 ND<1.0 - -- 5.3 ATI MW-7 11/02/95 4.46 17.10 -12.64 ND<50 --- -- 3.4 ND<O,5 ND<0.5 ND<l.0 ND<5.0 - 4.2 ATI MW-7 01/16/96 4.46 16.44 -11.98 ND<50 --- -- 4.6 ND<0.50 ND<0.50 ND<1.0 ND<5.0 -• ATI MW-7 04!22196 4.46 14.27 -9.81 ND<50 --- - 2.0 ND<l ND<l ND<t ND<10 - - SPL MW-7 07112/96 4.46 14.67 -10.21 ND<50 -- ND<0.5 ND<l ND l ND<l ND<10 -- 1.7 SPL MW-7 11114/96 4.46 15.60 -11.14 ND<50 ND<0.5 ND<1A ND<1.6 ND<1.0 ND<10 -- 3.2 SPL MW-7 03111/97 4.46 12.55 -8.09 - --- --- -- --- -- -- - - - - MW-7 05/22/97 446 13.19 -8.73 -» --- --- --- __ - ._ MW-7 06/06/97 4.46 13.99 -9.53 - --- --- --- --- -- -- -- - -- - MW-7 09!22/97 4,46 14.06 -9.60 --- -" -- --- --- --- 30-Oct-97 PAGE 3