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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING BP OIL COMPANY SERVICE STATION NO.11195 16500 SOUTH INTERSTATE 5,LATHROP.CALIFORNIA ALISTO PROJECT NO.10-151 WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-O B T E X MTBE TOG HVOCs DO LAB ID SAMPLING! ELEVATION {a) WATER ELEVATION (b) (ugA) (u9A) (ugh) (ugl) (ugq) (ug4) (ug4) (ug11) (ug1) (ppm) MONITORING (Feet) (Feel) (Feat) MW-1 12/21/92 14.39 11.18 3.21 NO<50 -- ND<0.5 ND<0.5 ND<0.5 ND<0.5 - •-• - - PACE MW-1 05/17/93 14.39 8.41 5.98 ND<50 - ND<0.5 ND<0.6 0.6 2.1 -•- --- - - PACE MW-1 09/15/93 14.39 9.75 4.61 ND<50 -- ND<0.5 ND<0.6 ND<0.5 ND<0.5 --• -- - -- PACE MW-1 01112!94 14.39 10.49 3.90 N0460 •- ND<0.5 ND U.5 ND<0.5 NO U.5 -- -- -• 3.7 PACE MW-1 05112/94 14.39 9.77 4,62 ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - -- 41) PACE MW-1 10/07/94 14.39 10.54 3.65 ND<50 - ND<0.5 ND<0.5 ND<0.5 ND<0.5 - -- 3.9 PACE MW-1 12/08/94 14.39 10.75 3.64 1300 - 0.8 2.4 ND<0.6 ND<0.5 - -- 4.1 PACE MW-1 02/21/95 14.39 6.44 5.95 fig - ND<0.50 ND<0.50 ND<0.50 ND<1.0 - -- r 82 A-n MW-1 06/09/95 14.39 7.94 6.45 -- - - - MW-1 08/31/95 14.39 9.81 4.56 91 -- 0.70 ND<050 ND4.50 ND0.0 200 - -- 6.5 All MW-1 11/02/95 14.39 10.38 4.01 - - -- MW-1 02/26/96 14.39 6.98 7.41 ND<50 - ND<0.5 ND4 ND<l ND<l 130 - BS SPL MW-1 091D5/96 14.39 9.31 5.06 ND<50 - ND<O.5 ND<1.0 ND<1.0 ND<1.0 ND<10 -- -- 7.7 SPL MW-2 12/21/92 14.20 10.96 3.24 ND<50 - ND<o.5 ND<0.5 ND<0.5 ND<0.5 - --- - PACE MW-2 05/17/93 14.20 8.20 6.00 120 - 1.8 0.6 1.2 1 - -- -- -- PACE MW-2 09115!93 1420 9.58 4.62 2800 - 97 ND<2.5 290 250 - -- -- - PACE MW-2 01/1294 1420 10.28 3.92 51 -- ND<0.5 ND<0.5 ND<0.5 ND<0.5 - -- 4.3 PACE MW-2 05112/94 1420 9.57 4.63 64 -- ND<0.5 ND<o.5 ND<0.5 ND<0.5 -- 3.9 PACE MW-2 10/07/94 14.20 10.36 3.64 86 -- ND<0.5 ND<0.5 NM.6 ND<0,5 --- -- -- 4.0 PACE MW-2 12!06194 14.20 10.53 3.67 2,300 - NM,6 ND<0.5 ND<0.5 ND<0.5 - -•• - 4.0 PACE MW-2 02/21/95 14.20 8.24 5.96 1100 - 2.7 ND<2.5 ND<26 ND<5.0 - - -- 82 ATI MW-2 06/09/95 1421) 7.76 6.44 - - - MW-2 08/31/95 1420 9,56 4.62 550 ND<5.0 ND<5.0 ND<5.0 ND<10 2500 - -• 8.5 ATI MW-2 11/02/95 14.20 10.15 4.05 -- - - - - MW-2 02/28/96 1420 6.81 7.39 90 -- 2.1 ND<1 2 ND<l 1400 -- -- 6.3 SPL MW-2 09/05/96 14.20 9.12 5.08 ND<W -- ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 --- - 8.4 SPL MW-3 12/21/92 15.10 11.84 326 1300 - 6.7 3.1 9.1 310 - --- - -- PACE MW-3 05117/93 15.10 9.05 6.05 3600 - 20 9.3 470 700 PACE OC-1 (c) 05ry 7193 15.10 - --- 4000 - 23 12 520 610 - -- --- -- PACE MW-3 09/15/93 16.10 10.44 4.66 38000 - 770 34 1700 3300 - --- - -- PACE MW-3 01/12/94 15.10 11.15 3.95 380 - ND<0.5 ND4.5 ND<0.5 NU O.5 -- -- 5.3 PACE OGl (c) 01112/94 15,10 - - 400 -- ND<0.5 ND<0.5 ND<0,5 ND<0.5 PACE MW-3 05112/94 15.10 10.45 4.65 180 - 0.7 ND<05 4.3 4.2 - - -- 4.4 PACE OC-1 (C) 05/12/94 15.10 - •- 170 - 0.7 ND<0.5 3.6 3.9 - - - PACE MW-3 14107/94 15.10 11.21 3.69 120 - ND<0.5 ND<0.5 ND<0.5 ND4.5 - -- - 4.3 PACE OC-1 (c) 10/07/94 15.10 - -- ND<50 - 0.7 ND<0.5 ND<0.5 ND O.S - --- --- - PACE MW-3 12/08/94 15.10 11.40 3.70 470 -• 1.1 1.8 ND<0.5 9.0 - -- 4.6 PACE OC-1 (c) 12/06/94 15.10 -- - 460 - 0.7 1.1 ND<0.5 5.9 - -- - PACE MW3 02/21195 15.10 9.11 5.99 4900 6.4 ND<5.0 370 400 -- -- - 6.2 ATI MW-3 06/09195 15.10 8.59 6.51 -- - --- MW-3 08131195 15.10 10.46 4.64 5500 -- 11 ND<S.D 890 460 4300 - 8.0 ATI MW- 11/02/95 15.10 11.05 4.05 - - --- - _-- - - MW-3 02!26796 15.10 7.66 7.44 1600 - 32 ND<l 270 227 1200 --- - 8.0 SPI- OC-1 (c) 02128/96 15.10 - --- 1400 - 2.8 ND<l 240 204 1100 •-• -- - SPL MW-3 09/05/96 15.10 9.99 5.11 3700 - ND<12 ND<25 420 NDQ5 2100 - -- 7.7 SPL 24-0ct-96 PAGE1