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0 0 0 Z. TABLEUMMARY OF RESULTS OF GROUNDWATER MONITORING WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-D TPH B T E X MTBE HVOC DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ug/1) (ug/1) (ug/1) (ug/1) (ug/1) (ugll) (ug4) (ugll) (ugll) (ppm) MONITORING (Feet) (Feet) (Feet) I MW-1 12121/92 397 2040 -1543 2200 --- --- 56 15 ND<0 5 89 --- — MW-1 04/04/93 397 1551 -1154 160 --- --- 92 ND<0 5 ND<0 5 06 --- --- -- PACE MW-1 04/26/93 397 1725 -1328 --- --- --- -- -- --- 460 (c) -- — --- MW-1 10/05/93 397 1800 -1403 6000 — -- 450 41 17 18 350 (c) -- PACE MWA 01/07/94 397 1775 -1378 6600 -- -- 410 200 45 460 2800 (c) -- PACE j QC-1 (d) 01/07/94 --- -- -- 8700 -- — 460 240 57 600 2800 (c) -- --- PACE MW-1 04/20/94 397 1698 -1301 63 — - ND<0 5 ND<0 5 ND<0 5 ND<0 5 120 (c) --- 40 PACE QC-1 (d) 04/20/94 --- -- --- ND<50 — -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 200 (c) — --- PACE MW-1 04/25/94 397 1697 -1300 _— _ __ _- MW-1 07/28/94 397 1741 -1344 430 — --- 36 12 24 71 -- --- 39 PACE MW-1 12/09/94 397 1789 -1392 2200 — — 36 74 37 1 7 -- -- 41 PACE MW-1 03/03/95 397 1655 -1258 1400 (e) -- - ND<2 5 ND<2 5 ND<2 5 ND<5 0 -- --- 51 ATI QC-1 (d) 03/03/95 --- -- --- 1400 (e) --- -- ND<2 5 ND<2 5 ND<2 5 ND<5 0 — --- --- ATI MW-1 04112/95 397 1527 -1130 4700 — — 310 ND<5 0 79 450 --- -- 78 ATI MWA 07/20/95 397 1557 -1160 180 — 47 062 37 38 --- -- 68 ATI MW-1 11/02195 397 1645 -1248 1400 --- -- 330 57 83 85 3100 -- 43 ATI MW-1 01116/96 397 1586 -1189 1400 -- 110 ND<5 0 ND<5 0 51 3900 --- ATI MW-1 04/22/96 397 1375 -978 ND<50 -- — ND<0 5 ND<1 ND<1 ND<1 27 -- -- SPL MW-1 07/12/96 397 1406 -1009 1100 -- - 70 ND<10 ND<10 ND<10 7700 24 SPL MW-1 11/14/96 397 1496 -1099 40000 -- -- 350 ND<25 ND<25 ND<25 88000 -- 33 SPL MW-1 03/11/97 397 1201 -804 NDe50 __ ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 — 43 SPL QC-1 (d) 03/11/97 -- — --- ND<50 -- — ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 -- SPL MW-1 05/22/97 397 1264 -867 60 — -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 17 --- 37 SPL MW-1 08/06/97 397 1380 -983 --- — --- -- --- -- -- -- — 62 -- MW-1 09/22/97 397 1386 -969 ND<50 --- -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 - 60 SPL MW-1 01/07/98 397 1357 -960 ND<50 -- — ND<0 5 ND<1 0 ND<1 0 NO<1 0 14 - 57 SPL MW-1 07/01/98 397 986 -589 2600 — — ND<0 5 ND<1 0 ND<1 0 ND<1 0 7100 --- 55 SPL MW-1 09/18/98 397 1150 -753 3000 --- --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 3500 --- 63 SPL MW-1 (1) 01/19/99 397 -- -_ Blaine Tech Services Inc, Report 000504-S-1 BP Oil 11193 at 3202 W Hammer Lane,Stockton,California Page i