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• TABLE 1- 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/I) (ug/I) (ug/1) (ug11) (ug/1) (ug/1) (ug/1) (ug/0 (ppm) MONITORING (Feet) (Feet) (Feet) MW-1 12/21192 397 2040 -1643 2200 -- — 56 15 ND<O 5 89 -- -- -- -- MW-1 04/04/93 397 1551 -1154 160 -- --- 92 ND<O 5 ND<O 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 MW-1 01!07194 397 1775 -1378 6600 --- — 410 200 45 460 2800 (c) -- --- PACE QC-1 (d) 01/07/94 -- — --- 8700 — 460 240 57 600 2800 (c) -- — PACE MW-1 04/20/94 397 1698 -1301 63 --- ND<O 5 ND<O 5 ND<O 5 ND<O 5 120 (c) --- 40 PACE QC-1 (d) 04120194 --- -- -- ND<50 -- --- ND<O 5 ND<O 5 ND<O 5 ND<O 5 200 (c) — -- PACE MW-1 04/25/94 397 1697 -1300 --- — — -- — --- — _ -- —_ MW-1 07/28/94 397 1741 -1344 430 -- --- 36 1 2 24 71 39 PACE MW-1 12/09/94 397 1789 -1392 2200 — — 36 74 37 17 --- -- 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 04/12195 397 15 27 -1130 4700 — 310 ND<5 0 79 450 - — 78 ATI MW-1 07/20/95 397 1557 -1`160 180 — — 47 062 37 38 — — 68 ATI MW-1 11/02/95 397 1645 -1248 1400 — -- 330 57 83 85 3100 --- 43 ATI MW-1 01/16/96 397 1586 -1189 1400 -- --- 110 ND<5 0 ND<5 0 51 3900 — --- ATI MW-1 04/22/96 397 1375 -978 ND<50 --- — ND<O 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 11114196 397 1496 -1099 40000 -- - 350 ND<25 ND<25 ND<25 88000 -- 33 SPL I MW-1 03/11/97 397 1201 -804 ND<50 -- --- ND<O 5 ND<1 0 ND<1 0 ND<1 0 ND<10 --- 43 SPL QC-1 (d) 03111/97 --- -- -- ND<50 — — ND<O 5 ND<1 0 ND<1 0 ND<1 0 ND<10 - --- SPL MW-1 05122197 397 1264 -867 60 --- -- ND<O 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 -989 ND<50 -- — ND<O 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<O 5 ND<1 0 ND<1 0 ND<1 0 14 -- 57 SPL MWA 07/01/98 397 986 -589 2600 — --- ND<O 5 ND<1 0 ND<1 0 ND<1 0 7100 --- 55 SPL MW-1 09/18/98 397 11 50 -753 3000 --- -- ND<O 5 ND<1 0 ND<1 0 ND<1 0 3500 --- 63 SPL MW-1 (i) 01/19/99 397 --- --- -- -- — -- -- — -- -- -- — -- I Blaine Tech Services, Inc, Report 000714-U-1, BP Oil 11193 at 3202 W Hammer Lane Stockton California Page 1