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TABLE 1 -SUMMARY OF RESULTS OF GROUNDWATER MONITORING WELL DATE OF CASING DEPTH TO GROUNDWATER TPN-G B T E X MTBE DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ug/L) (ug/L) (ug/L) (ug/L) (ug1L) (ug/L) (ppm) MONITORING (Feet) (Feet) (Feet) MW-6 08/05/91 580 2982 -2402 ND ND ND ND ND --- — PRE MW-6 08/15/91 580 — — _- MW-6 12/09/91 580 3042 -2462 ND ND ND ND ND --- — PRE MW-6 03/09/92 580 2953 -2373 ND ND ND ND ND — -- PRE MW-6 06/19/92 580 2924 -2344 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 — — ANA MW-6 09/18/92 580 3103 -2523 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<O 5 — — ANA MW-6 12/09/92 580 3142 -2562 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 — -- ANA MW-6 03/11/93 580 2895 -2315 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<0 5 — {I) — PACE MW-6 06/15/93 580 2691 -2111 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<O 5 -- {I) — PACE MW-6 09/15/93 580 2729 -2149 MW-6 12/22/93 580 2717 -2137 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 — {I) --- PACE MW-6 04/01/94 580 2629 -2049 — — — _- — ._ — MW-6 07/27/94 580 2632 -2052 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 G) 36 PACE MW-6 11/30/94 580 2680 -2100 — — — -_- _ — — MW-6 02115/95 580 2573 -1993 ND<50 ND<O 50 ND<O 50 ND<0 50 ND<1 0 --- 39 ATI MW-6 04/21/95 680 2374 -1794 --- --- -_ _ — — MW-6 07/21/95 580 2298 -1718 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 — 63 ATI MW-6 (e) 10/20/95 580 2339 -1759 ND<50 ND00 50 ND<O 50 ND<0 50 ND<1 0 67 73 ATI MW-6 10/20/95 580 — — ND<50 15 067 ND<0 50 ND<10 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 04/23196 580 -- — ND<500 ND<12 ND<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<O 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 1155 -575 ND<50 ND<O 5 ND<1 0 ND<1 0 ND<1 0 ND<10 37 SPL MW-6 01!19199 580 1349 -769 7300 ND<1 0 ND<1 0 ND<10 ND<1 0 9700 -- SPL MW-6 07/14/99 580 1255 -675 1000 ND<1 0 ND<10 ND<10 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<O 5 ND<O 5 ND<O 5 ND<O 5 6200 — PACE MW-6 04/11/00 580 1526 -945 77 ND<0 5 ND<O 5 ND<0 5 ND<O 5 180 — PACE MW-6 07/14/00 580 1197 -617 55 ND<O 5 ND<O 5 ND<0 5 ND<0 5 150 — PACE MW-6 10/26/00 580 1360 -780 1300 100 79 11 72 2200 — PACE MW-6 01/16/01 580 1339 -759 1200 206 ND<O 5 ND<O 5 ND<O 5 1700 — PACE MW-6 04112/01 580 1193 -613 120 ND<O 5 NO<0 5 ND<O 5 ND<1 5 157 — PACE MW-6 07/23/01 580 1356 -776 200 ND<0 5 ND<O 5 ND<0 5 ND<1 5 254 — PACE MW-6 12!14101 580 1475 -895 2100 ND<O 5 ND<O 5 ND<O 5 ND<1 0 2140 — PACE MW-6 01/10/02 580 1292 -712 1600 ND<5 0 ND<5 0 ND<5 0 ND<10 1580 -- PACE Blaine Te�rvices,Inc,Report 020110-KF-1,BP Oil11192 at 1403 Country Club Blvd,Stockt�California Page 7