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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.to-136 WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-D TPH B T E K MTBE HVOC DO LAB ID SAMPLING! ELEVATION (a) WATER ELEVATION (b) (ugA) {ugl} jug/1) (4) (ug) (4) (ugA) (ugA) (ug4) (ppm) MONITORING (Feet) (Feet) (Feet) MW-1 12/21192 3.97 20.40 -16.43 2200 56 15 ND<o.5 8.9 - - MW-1 04104193 3.97 15.51 -11.54 160 - -- 9.2 ND<0.5 ND<0.5 0.6 -- -- PACE MW-1 04/26/93 3.97 17.25 -13.28 - -- -_ - -- - .- -- -• - MW-1 1010593 3.97 18.00 -14.03 6000 - 450 41 17 18 - - PACE MW-1 01/0754 3.97 17.75 -13.76 6600 •-- »• 410 200 45 460 -- -- PACE OC-1 (c) 01107/94 -- -- - 8700 - 460 240 57 600 - -- PACE MW-1 0412(/94 3.97 16.98 •13.01 63 - - ND<0.5 ND<0.5 ND<0.5 ND<0.5 - 4.0 PACE OC-1 (C) 04r-K1 -- - -- ND-50 --- - NO<0.5 NO<0.5 ND<0.5 ND<0.5 - PACE MW-1 04!25194 3,97 16.97 -13.00 -- - - -- - -- - - MW-1 07/28194 3.97 17.41 -13,44 430 -- - 3.6 1.2 2.4 7.1 - --- 3.9 PACE MW-1 12/09/94 3.97 17.89 -13.92 2200 -- - 36 7.4 3.7 1.7 - 4.1 PACE MW-1 0310355 3.97 16.55 -12.58 1400 -- -- ND<2.5 ND<2.5 ND<2.5 ND<5.0 - - 5.1 ATI OC-1 (c) DW03+55 - - -- 1400 -- - ND<2.5 NO-2.5 N0<2.5 ND<5.0 - -- --- ATI MW-1 0411255 3.97 15.27 -11.30 47DO --- --- 310 ND-5.0 79 450 - --• 7.8 ATI MW-1 07/20195 3.97 15.57 •11.60 180 - -- 47 0.62 3.7 3.8 - 6.8 ATI MW-11110255 3.97 16.45 •12.48 1400 -- -- 330 57 8.3 85 3100 --• 4.3 ATI MW-1 01/16/96 3.97 15.86 -11.89 1400 - -- 110 ND<5.0 ND<5.0 5.1 3900 -- --• ATI MW-1 04/22/96 3.97 13.75 -9.78 ND-50 -- -- ND<0.5 ND<7 ND<4 ND MW-1 07/12/96 3.97 14.06 -10.09 1100 -- -• 70 ND<10 ND<10 ND<10 7700 -- 2.4 SPL MW-1 11114/96 3.97 14.96 -10.99 40000 --- - 350 NDQ5 ND-125 ND<25 86000 --- 3.3 SPL MW-1 03111/97 3.97 12.01 -8.04 ND<50 -- -- ND<0.5 ND<1.0 ND<1.0 ND<1A ND<10 --- 4.3 SPL OC-1 (c) 03111/97 - --- ND<50 -- - ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND-10 •-• --- SPL MW-2 '12121/92 4.62 21.26 •16.44 1500 --- - 120 9.6 1.0 24 --- -- --- -•• MW-2 04104!93 4.82 16.45 -13.63 2600 --- -- 460 13 77 81 -- -- --- PACE MW-2 04126/93 4.82 18.11 -13.29 -- - -- - -- -- -- - -- -- - MW-2 10/05193 4.82 18.65 •14.03 1500 -- -- 3200 120 540 710 -- -- -- PACE MW-2 01107194 4.82 18.48 -13.66 1900 - -- 400 13 56 79 -l{j U - -- PACE MW-2 04r20194 4.62 17.62 -13.00 18000 - 3700 120 610 900 -�jW - 4.3 PACE MW --2 04r25194 4.62 17.80 -12.98 - - - -- - - rf - --- - MW-2 07r28194 4.82 18.14 -13.32 28000 - - 5300 80 750 340 - .-- 4.3 PACE MW-2 12!09194 4.82 18.71 -13.89 32000 - - 4000 150 760 800 - - 4.3 PACE MW-2 0310395 4.82 17.35 -12.53 26W - - 540 6.8 96 64 - -- 4.9 ATI MW-2 04/12/95 4.62 16.23 -11.41 1800 - - 360 3.3 70 50 - ••. 7.6 An OC 1 (c) 04/12/95 - - -- 1900 --- - 360 32 70 51 - - -- ATI MW-2 07/20/95 4,62 16.45 -11.63 8800 -- - 16W 22 290 290 -- -- 6.4 An OC-1 (C) 07120.55 -- - -- 7200 1300 17 240 240 - »- - ATI MW-2 11/02/95 4.B2 17.30 •12.48 $ --- -•- 780 14 150 140 7900 »• 5.2 ATI OC-1 (c) 11/02/95 - - - 4800 - 840 is 160 140 8400 --- AT1 MW-2 01/16/96 4.82 16.66 -11.84 2000 - -- 300 8.6 62 48 3200 -- -- AT] OC-1 (c) 01/16/96 -- -- -- 2000 - - 290 8.4 59 44 3000 -- --- ATI MW-2 04/22/96 4,82 14.82 -10.00 680 - 140 4 36 12 1700 - --- SPL OC-1 (c) 00.!22196 -- - - 490 - -- 130 3 34 11 2100 - -- SPL MW-2 07112/96 4.82 15.12 -10.30 4800 - - 890 19 190 52 19000 -- 2.2 SPL OC-1 (c) 07/12/96 - -- - 5300 - - 990 21 220 55 20000 - -- SPL MW-2 11/14/96 4.82 16.03 -11.21 24OW - - 590 25 70 ND4.5 18000 --- 2.9 SPL OC-1 (c) 11/14196 - -- - 23000 - 570 ND<25 68 ND--25 21000 -- -- SPL MW-2 03h1/97 4.82 12.66 -6.04 770 -- - 12 ND<5.0 ND-5.0 ND<5.0 970 4.0 SPL 18-Apr-97 PAGE 1