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0 0 ! 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) (ugA) (ugA) (ugA) (ugA) (ug/1) (ppm) j MONITORING (Feet) (Feet) (Feet) MW-7 08/05/91 621 3082 -2461 70 19 NO NO ND --- PRE MW-7 08/15/91 621 --- --- --- --- --- — -- -- – PRE MW-7 12/09/91 621 3136 -2515 NO 19 NO 12 ND -- — PRE MW-7 03/09/92 621 3015 -2394 NO ND NO NO ND — --- PRE MW-7 06/19/92 621 3019 -2398 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 – – ANA MW-7 09/18/92 621 3198 -2577 90 ND<0 5 ND<O 5 ND<O 5 ND<O 5 --- - ANA MW-7 12/09/92 621 3233 -2612 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- -- ANA QC-1 (d) 12/09/92 — — -- ND<50 ND<O 5 ND<0 5 ND<0 5 ND<O 5 -- — ANA MW-7 03/11/93 621 2985 -2364 110 31 08 22 14 -- --- PACE MW-7 06/15/93 621 2774 -2153 71 14 08 28 24 -- — PACE QC-1 (d) 06/15/93 — --- -- 120 1 9 ND<O 5 so 46 — -- PACE MW-7 09/15/93 621 2816 -2195 170 1 2 ND<0 5 58 25 – --- PACE QC-1 (d) 09/15/93 -- -- — 160 1 ND<O 5 55 26 -- — PACE MW-7 12/22/93 621 2803 -2182 110 1 9 1 3 38 10 --- - PACE MW-7 04/01/94 621 2715 -2094 340 25 1 30 43 38 PACE QC-1 (d) 04/01/94 --- --- — 330 26 09 28 42 – --- PACE MW-7 07127194 621 2721 -21 00 72 ND<O 5 ND<O 5 ND<0 5 ND<O 5 29 PACE M11-7 11/30/94 121 2751 -2137 140 ND<0 5 08 44 13 – 38 PACE QC-1 (d) 11/30/94 --- -- — 140 06 1 5 93 -- -- PACT= MW-7 02/15/95 621 2658 -2037 90 ND<0 50 ND<O 50 21 17 — 34 ATI MW-7 04121/95 621 2461 -1840 53 065 ND<O 50 14 14 — 49 ATI MW-7 07/19/95 621 2374 -1753 81 059 ND<O 50 055 ND<1 0 -- 54 ATI QC-1 (d) 07/19/95 — --- — 82 ND<O 50 ND<O 50 054 ND<1 0 — --- ATI MW-7 (e) 10/20/95 621 2415 -1794 110 ND<O 50 ND<O 50 ND<O 50 ND<1 0 160 54 ATI MW-7 10/20/95 621 --- -- 89 ND<O 50 ND<O 50 ND<O 50 ND<1 0 110 52 ATI MW-7 (e) 04/23/96 621 2078 -1457 ND<500 ND<0 5 ND<0 5 ND<O 5 ND<O 5 150 — SPL MW-7 04/23/96 621 -- -- ND<500 ND<0 5 ND<O 5 ND<O 5 ND<O 5 160 -- SPL MW-7 07/12/96 621 2118 -1497 ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 59 SPL QC-1 (d) 07/12/96 — — -- ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 --- SPL MW-7 10/18/96 621 2070 -1449 220 ND<O 5 ND<1 0 ND<1 0 ND<1 0 200 53 SPL QC-1 (d) 10/18/96 --- --- --- 240 ND<O 5 ND<1 0 ND<1 0 ND<1 0 200 --- SPL MW-7 02/26/98 621 1300 -679 120 ND<O 5 ND<1 0 ND<1 0 ND<1 0 95 45 SPL MW-7 07/07/98 621 1220 -599 1800 ND<O 5 ND<1 0 ND<1 0 ND<1 0 2400 35 SPL MW-7 01/19/99 621 1433 -812 3200 ND<1 0 ND<1 0 ND<1 0 ND<1 0 3800 -- SPL MW-7 (h) 07/14/99 621 1313 -692 -- — — — --- --- – -- MW-7 07/26/99 621 1330 -709 21000 ND<1 0 ND<1 0 72 24 18000 – SPL MW-7 10/07/99 621 1464 -111 33000 ND<1 0 ND<1 0 1 1 ND<1 O 19000 – SPL MW-7 01/20/00 621 1515 -894 200 16 ND<O 5 ND<O 5 ND<O 5 25000 -- PACE Blaine Tech Services, Inc, Report 000120-T-2,BP Oil 11192 at 1403 Country Club Blvd,Stockton,California Page 6