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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) (ugA) (ug") (ugA) NO (ugA) (ugA) (ppm) MONITORING (Feet) (Feet) (Feet) MW-6 08/05/91 580 2982 -2402 NO ND NO ND ND -- -- PRE MW-6 08/15/91 580 --- -- -- MW-6 12/09/91 580 3042 -2462 ND NO NO NO ND -- --- PRE MW-6 03/09/92 580 2953 -2373 ND NO NO ND NO -- --- PRE MW-6 06/19/92 580 2924 -2344 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- — ANA MW-6 09/18/92 580 3103 -2523 ND<50 ND<0 5 ND<0 5 ND<0 5 NO<0 5 — ANA MW-6 12/09/92 580 3142 -2562 ND<50 ND<0 5 ND<O 5 ND<0 5 ND<0 5 --- -- ANA MW-6 03/11/93 580 2895 -2315 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- -- PACE MW-6 06/15/93 580 2691 -2111 NO<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- PACE MW-6 09/15193 580 2729 -2149 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 – -- PACE MW-6 12/22/93 580 2717 -21 37 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- PACE MW-6 04/01/94 580 2629 -2049 MW-6 07/27/94 580 2632 -2052 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 --- 36 PACE MW-6 11/30/94 580 2680 -2100 — MW-6 02/15/95 580 2573 -1993 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 --- 39 ATI MW-6 04/21/95 580 2374 -1794 MW-6 07/21/95 580 2298 -1718 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 — 63 ATI MW-6 (e) 10/20/95 580 2339 -1759 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 67 73 ATI MW-6 10/20/95 580 — --- ND<50 1 5 067 ND<0 50 ND<1 0 ND<5 0 65 ATI MW-6 (e) 04/23/96 580 2000 -1420 ND<500 ND<5 ND<5 ND<5 13 2700 -- SPL MW-6 04/23/96 580 -- --- ND<500 ND<12 NO<12 ND<12 ND<12 4100 --- SPL MW-6 07/12/96 580 2022 -1442 — — __ __- -__ – MW-6 10/18/96 580 1942 -1362 2300 10 ND<1 0 ND<1 0 ND<1 0 7900 44 SPL MW-6 02/26/98 580 1160 -580 490 ND<0 5 ND<1 0 ND<1 0 ND<1 0 590 49 SPL QC-1 (d) 02/26/98 -- — --- 460 ND<0 5 ND<1 0 ND<1 0 ND<1 0 680 -- SPL MW-6 07/07/98 580 1156 -575 ND<50 ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 37 SPL MW-6 01/19/99 580 1349 -769 7300 ND<1 0 ND<1 0 ND<1 0 ND<1 0 9700 -- SPL MW-6 07/14/99 580 1255 -675 1000 ND<1 0 ND<1 0 ND<1 0 ND<1 0 1100 --- SPL MW-6 10/07/99 580 1410 -830 4900 ND<1 0 ND<1 0 ND<1 0 ND<1 0 4200 --- SPL MW-6 01/20/00 580 1433 -853 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 6200 -- PACE Blaine Tech Services Inc Report 000120-T-2 BP Oil 11192 at 1403 Country Club Blvd,Stockton Califomia Page 5 I