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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER MONITORING + I WELL DATE OF CASING DEPTH TO GROUNDWATER TPN-G B T E X MTBE DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ugA) (ugA) 09/1) (ugA) (ugA) NO (ppm) MONITORING (Feet) (Feet) (Feet) MW-3 05/01/90 5.52 25.23 -19.71 200 33 ND 2 1.5 PRE MW-3 08/05/91 5.52 DRY --- -- -- -- -- --- PRE MW-3 12/19/91 5.52 DRY - _- - --- --- -- PRE MW-3 03/09/92 5.52 DRY --- _.. --- --- --- - -- PRE MW-3 06119192 5.52 DRY --- - - --- --- -_ -_ ANA MW-3 09/18/92 5.52 DRY --- --- - --- --- ANA MW-3 12/09/92 5.52 DRY --- --- --- --- --- -- - ANA MW-3 03/11/93 5.52 DRY --- --- --- -- --- -- PACE W-3 06/15/93 5.52 27.02 -21.50 -- --- --- --- -- --- --- PACE MW-3 09/15/93 5.52 27.43 -21.91 --- PACE MW-3 12/22/93 5.52 27.30 -21.78 2300 31 6.5 120 220 PACE QC-1 (d) 12/22/93 --- 2300 31 6.6 120 220 - -- PACE MW-3 04/01/94 5.52 26.42 -20.90 --- _-_ MW-3 07/27/94 5.52 26.50 -20.98 920 8.2 2 41 64 3.2 PACE QC-1 (d) 07/27/94 --- 1100 8.6 2.4 60 90 --- PACE MW-3 11/30/94 5.52 26.86 -21.34 --- -- _-. MW-3 02/15/95 5.52 26.55 -21.03 1200 10 1.2 85 110 3.5 ATI QC-1 (d) 02/15/95 --- --- --- 950 9.1 0.99 59 79 --- - ATI MW-3 04/211'95 5.52 24.58 -19.08 --- --- -- --- MW-3 07/19/95 5.52 23.69 -18.17 --- MW-3 (e) 10/20155 5.52 24.11 -18.59 520 5.6 ND<0.50 2.2 1.4 410 4.3 ATI MW-3 10/20/95 5.52 --- --- 520 4.7 ND<0.50 14 12 240 4.7 ATI MW-3 (e) 04/23196 5.52 20.80 -15.28 ND<500 5.7 2 2 1 300 SPL MW-3 04123M 5.52 --- --- ND<500 5.1 ND<0.5 10 5 280 -- SPL QC-1 (d) 04/23/96 5.52 --- --- ND<500 5.1 ND<0.5 12 4 240 --- SPL MW-3 07112196 5.52 21.50 -15.98 --- --- --- --- - MW-3 10/18/96 5.52 20.67 -15.15 480 3.0 2.5 ND<1.0 ND<1.o 300 5.9 SPL MW-3 02/26/98 5.52 12.58 -7.08 1200 1.0 ND<i.0 ND<1.0 ND<1.0 890 4.3 SPL MW-3 07/07/98 5.52 12.19 -6.67 6600 ND<0.5 ND<1.0 ND<1.0 1.i 8300 3.7 SPL QC-1 (d) 07/07/98 5.52 --- -- 69DO ND<0.5 ND<1.0 ND<1.0 1.1 8500 4.3 SPL MW-3 01l19199 5.52 13.10 7.56 12000 ND<5.0 ND<5.0 ND<5.0 ND<5.0 15000 SPL MW-3 07/14/99 5.52 13.11 -7.59 29000 ND<5.0 ND<5.0 20 30 38000 -- SPL MW-3 10/07/99 5.52 14.58 -9.08 52000 ND<1.0 ND<1.0 8.7 1.1 35000 SPL Blaine Tech Services,Inc.,Report 991007-N-2,BP Oil 11192 at 1403 Country Club Bbd.,Stockton,California Page 2