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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") (ug/0 (ugA) (ug/1) (ug/1) (ppm) MONITORING (Feet) (Feet) (Feet) QC-1 (d) 06/15/93 --- --- -- 120 1.9 ND<0.5 5.9 4.6 --- -- PACE MW-7 09115/93 6.21 28.16 -21.95 170 1.2 ND<0.5 5.8 2.5 - - PACE QC-1 (d) 09115/93 --- --- - 160 1 ND<0.5 5.5 2.6 --- - PACE MW-7 12/22/93 6.21 28.03 -21.82 110 1.9 1.3 3.8 10 - PACE MW-7 04/01/94 6.21 27.15 -20.94 340 2.5 1 30 43 - 3.8 PACE QC-1 (d) 04101/94 --- -- -- 330 2.6 0.9 28 42 - - PACE MW-7 07/27194 6.21 27.21 -21.00 72 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- 2.9 PACE MW-7 11/30/94 6.21 27.58 -21.37 140 ND<0.5 0.8 4,4 8.3 - 3.8 PACE QC-1 (d) 11/30/94 --- --- -- 140 0.6 1 5 9.3 --- --- PACE MW-7 02/15/95 6.21 26.58 -20.37 90 ND<0.50 ND<0.50 2.1 1.7 - 3.4 ATI MW-7 04/21/95 6.21 24.61 -18.40 53 0.65 ND<0.50 1.4 1.4 -- 4.9 ATI MW-7 07/19/95 6.21 23.74 -17.53 81 0.59 ND<0.50 0.55 ND<1.0 - 5.4 ATI QC-1 (d) 07119/95 --- --- -- 82 ND<0.50 ND<0.50 0.54 ND<1.0 -- - ATI MW-7 (e) 10/20/95 6.21 24.15 -17.94 110 ND<0.50 ND<0.50 ND<0.50 ND<1.0 160 5.4 ATI MW-7 10/20/95 6.21 --- --- 89 ND<G,50 ND<0.50 ND<0.50 ND<1.0 110 5.2 ATI MW-7 (e) 04/23/96 6.21 20.78 -14,57 ND<500 ND<0.5 ND<0.5 ND<0.5 ND<0.5 150 - SPL MW-7 04/23/96 6.21 --- --- ND<500 ND<0.5 ND<G.5 ND<0.5 ND<0.5 160 --- SPL MW-7 07/12/96 6.21 21.18 -14.97 ND<50 ND<0.5 N0<1 ND<1 ND<1 ND<10 5.9 SPL QC-1 (d) 07/12/96 --- --- -- ND<50 ND<0.5 ND<1 ND<1 ND<1 ND<10 -- SPL MW-7 10118196 6.21 20.70 -14.49 220 ND<0.5 ND<1.0 ND<1.0 ND<1.0 200 5.3 SPL QC-1 (d) 10/18/96 --- -- -- 240 ND<0.5 ND<1.0 ND<1.0 ND<1.0 200 --- SPL MW-7 02/26/98 6.21 13.00 -6.79 120 ND<0.5 ND<1.0 ND<1.0 ND<1.0 95 4.5 SPL MW-7 07/07/98 6.21 12.20 -5.99 1800 ND<0.5 ND<1.0 ND<1.0 ND<1.0 2400 3.5 SPL HW-7 01/19/99 6.21 14.33 -8.12 3200 ND<1.0 ND<1.0 ND<1.0 ND<1.0 3800 --- SPL QC-2 (g) 09/18/92 --- -- --- ND<50 ND<0.5 ND<0,5 ND<0.5 ND<0.5 --- --- ANA QC-2 (g) 12/09/92 --- --- ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 -- - ANA QC-2 (g) 03/11/93 --- --- --- ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - --- PACE QC-2 (g) 06/15/93 - - ND<50 ND<0.5 ND<0.5 ND<0.5 1.3 --- --- PACE QC-2 (g) 09/15/93 --- - - ND<50 ND<0.5 ND<0.5 ND<0.5 0.7 - --- PACE QC-2 (g) 12122/93 --- - -- ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - PACE QC-2 (g) 04101/94 --- --- - ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - PACE QC-2 (g) 07/27/94 - --- ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - PACE QC-2 (g) 11/30/94 - ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- PACE QC-2 (g) 02/15/95 - - - ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 - - ATi QC-2 (g) 04/21/95 - ND<50 0.8 1.5 ND<0.50 ND<1.0 --- - ATI QC-2 (g) 07/19/95 --- --- --- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 - -- ATI QC-2 (g) 10/20/95 -- ND<50 ND<0.50 ND<0.50 ND<0.50 N130.0 ND<5.0 - ATI, QC-2 (g) 04123196 --- --- -- ND<500 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<10 - SPL Blaine Tech Services, Inc.,Report 990119-J-1,BP Oil 11192 at 1403 Country Club Blvd.,Stockton,California Page 5