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s � s TABLE 1 SUMMARY OF RESULTS OF GROUNDWATER MONITORING WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G B. T E X MTBE DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ug/1) (ug") WWI) (ugll) (ug/1) (ug/1) (ppm) MONITORING (Feet) (Feet) (Feet) MW-3 03/11/93 5.52 DRY --- -- --- - - --- --- - PACE MW-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) 12122193 -- --- -- 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 11130/94 5.52 26.86 -21.34 --- -- -- - -_ - -_ MW-3 02115195 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 04/21/95 5.52 24.58 -19.06 --- -- -- _- MW-3 07/19/95 5.52 23.69 -18.17 -- --- - -- -- ___ - MW-3 (e) 10/20/95 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) 04/23/96 5.52 20.80 -15.28 ND<500 5.7 2 2 1 300 --- SPL MW-3 04/23/96 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 07/12/96 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<1.0 300 5.9 SPL MW-3 02/26/98 5.52 12.58 -7.06 1200 1.0 ND<1.0 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 1.1 8300 3.7 SPL QC-1 (d) 07/07/98 5.52 - --- 6900 ND<0.5 ND<1.0 ND<1.0 1.1 8500 4.3 SPL MW-3 01119199 5.52 13.10 -7.58 12000 ND<5.0 ND<5.0 ND<5.0 ND<5.0 15000 --- SPL MW-4 05/01/90 6.75 26.31 -19.56 ND ND ND ND ND --- -- PRE MW-4 08/05/91 6.75 DRY -- - - - - - -- PRE MW-4 12/09/91 6.75 DRY - - -- - - --- - PRE MW-4 03/09/92 6.75 DRY - -- --- --- - -- -- --- ANA MW 4 06/19/92 6.75 DRY - -- --- -__ - __ ANA MW-4 09/18/92 6.75 DRY - --- -- - -- --- ANA MW-4 12/09/92 6.75 DRY --- - --- --- - --- - - ANA MW-4 03/11/93 6.75 DRY -- - -- -- --- PACE h1W-4 06/15/93 6.75 28.01 -21.26 - - - -- --- - PACE MW-4 09/15/93 6.75 28.50 -21.75 - -- --- - - --- PACE MW-4 12/22/93 6.75 28.33 -21.58 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 __ -- PACE MW-4 04/01/94 6.75 27.45 -20.70 --- --- --- MW-4 07/27/94 6.75 27.46 -20.71 190 ND<0.5 ND<0.5 ND<0,5 ND<0.5 --- 2.3 PACE MW-4 11/30/94 6.75 27.97 -21.22 -- --- -- - - - - Blaine Tech Services, Inc.,Report 990119-J-1,BP Oil 11192 at 1403 Country Club Blvd.,Stockton,California Page 2