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i • • 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 DEPTH TO GROUNDWATER TPH•G TPH-D TPH B T E X MTBE HVOC DO LAB ID SAMPLINGI ELEVATION (a) WATER ELEVATION (b) (ugA) (u9A) NO NO) NO W) NO (UgA) 00 (ppm) MONITORING (Feet) (Feet) (Feet) MW-3 12121!'92 5.15 21.52 •16.37 170 -- 2.8 ND4.5 ND4.5 ND<0.5 -•- -- - - MW-3 04/04193 5.16 18.59 -13.44 27D --• •-• 23 ND<0.5 ND<0.5 ND<0.5 - -- - PACE MW-3 04/26/93 5.15 18.34 -13.19 »- »- -•• -» »- --- -• MW-3 10105/93 5.15 19.10 -13.95 920 - -- 80 ND<0.5 ND<0.6 1.0 - -- -- PACE MW-3 01/07/94 5.15 18.62 •13.67 130 --- --- 12 ND<0.5 ND<0.5 1.5 - -- -• PACE MW-3 04!20!94 5.15 18.07 -12.92 99 (d) •-- -- 2.6 ND<0.5 ND<0.5 ND<0.5 --- --- 3.8 PACE MW-3 04/25/94 5.15 18.04 -12.89 - --- -- -- - - -- - •- - - 1 MW-3 07/28/94 5.15 18.50 -13.35 360 •-• 40 0.9 0.9 2.1 --- -- 3.6 PACE MW-3 12109794 5.15 18.99 •13.84 610 --- -- 140 2.9 3.4 2.8 ... - 3.9 PACE MW-3 03103795 5.15 17.62 -12.47 ND<50 -- -- 2.3 ND<0.50 ND<0.50 ND<1.0 - -• 4.7 ATI MW-3 04/12195 5.15 16.34 •11.19 ND<W -- -- 0.75 0.69 ND<0.50 ND<1.0 •- -•- 8.1 ATI MW-3 07120/95 5.15 16.72 -11.57 230 -- -• 4.5 ND4.50 ND<0.50 ND<1.0 -- - 7.9 ATI MW-3 11102/96 5.15 1258 -12.41 ND<50 .-- -- 0.81 ND<0.5 0.51 ND<1.0 640 - 4.2 ATI MW-3 01/16/96 5.15 16.90 -11.75 86 - -- ND<0.50 ND<0.50 ND4.50 ND0.0 270 - --- ATI MW-3 04/22)96 5.15 14.84 -9.69 ND<50 - -- ND<0.5 ND<4 ND MW-3 07112196 5.15 15.13 -9.98 N0<50 --- --- ND<0.6 ND<t ND<1 ND MW3 11/14196 5.15 16.01 -10.86 ND<50 » ••• ND<0.5 ND-1,0 NO-1,0 ND4.0 ND<10 •-- 3.4 SPL MW-3 03/11/97 5.15 13.10 -7.95 -- -- --- -- --- -- --- MWA 12/21/92 5.43 21.66 -16.25 110 --- -- ND<0.5 ND<0.5 N0<0.5 ND<0.5 -- --- •-- -- MWA 04AA/93 5.43 18.80 -13.37 180 -- -- 1.1 ND<0.5 ND<0.5 0.9 - ND (a} »• PACE QC-1 (c) 04/04/93 •- -- --- 310 1.9 ND<0.5 ND<0.5 0.9 - - PACE MW4 04/26/93 5.43 18.55 -13.12 - ND<50 ND.5000 -- --- -- - •- ••- -- -- MW-4 10/05/93 5A3 19.30 -13.87 140 ND<50 ND<5000 ND<0.5 ND<U.5 ND<0.5 ND<0.5 -- ND (a} - PACE OC-1 (c) 10/06/93 -» -- -- 160 •- •-- ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- --- -- PACE MW-4 01/07/94 5.43 19.05 -13.62 100 - -- ND<0.5 ND<0.5 ND<0.5 ND<0.5 - --- PACE MWA 04/20/94 5.A3 18.31 -12.68 74 •- -- ND<0.6 ND<0.5 ND<0.5 1.3 - -- 4.1 PACE MWA 04/25/94 5.43 18.26 -12.85 -- - - - - - - - MW-4 07/28/94 5.43 18.71 -13.28 66 -- ND<0.5 ND<0.5 ND<0.5 ND<015 4.0 PACE MW-4 12109!94 5.43 1920 -13.77 50 - - ND<0.5 ND<0.5 ND<0.6 NO<1 - 4.4 PACE MW-4 03�0"5 5.43 17.87 •12.44 NO-50 -- -- ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- - 4.6 ATI MW-4 04/12)95 5.43 16.59 •11.18 NMO -- - ND<0.50 ND<0.50 ND<0.50 ND<1.0 - •- 7.9 ATI MW-4 07124/95 5.43 16.97 -11.54 ND<50 - -- NIm 50 ND<0.50 ND<0.50 ND<1.0 - --- 4.6 ATI MW-4 11102!95 5.43 17.81 •12.38 ND<W - -- ND<0.5 ND<0.5 ND<0.5 ND<1.0 ND<S.0 --- 4.1 ATI MW-4 01/16/96 5.43 17.21 -11.78 ND<50 - - ND<0.50 ND<0.50 N0<0.50 ND<1.0 ND<5.0 --- - AT] MW-4 04P22/96 5.43 15.11 -9.68 ND<50 --- --- ND<0.5 ND<1 ND MW-4 07/12/96 5.43 16.42 -9.99 ND<W -- -- ND<0.5 ND<1 ND<1 ND<1 ND<10 --- 2.2 SPL MW-4 11/14/96 5.43 16.30 -10.87 ND<W -- -- ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<lo 3.4 SPL MW-4 03/11/97 5.43 13.50 •6.07 -- -. .» ... .- -- --- -- -.. . 18-Apr-97 PAGE 2