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0 • TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER MONITORING _a 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) (ug/1) (ug/1) (ugll) (ug") (ppm} MONITORING (Feet) (Feet) (Feet) MW-1 12/29/92 397 2040 -1643 2200 -- 56 15 ND<0 5 89 MW-1 04/04193 397 15,51 -1154 160 - --- 92 ND<0 5 ND<0 5 06 PACE MW-1 04/26/93 397 1726 -1328 --- -- --- --- --- -- -- 460 (c) MW-1 10105/93 397 1800 -1403 6000 -- 450 41 17 18 350 (c) --- PACE MW-1 01107/94 397 1775 -1378 6600 -- — 410 200 45 460 2800 (c) --- --- PACE QC-1 (d) 01107194 -- --- -- 8700 – 460 240 57 600 2800 (c) --- -- PACE MW-1 04120194 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<54 __ ND<0 5 ND<0 5 ND<0 5 ND<0 5 200 (c) -- PACE MW-1 04/25194 397 1697 -1300 --- __- MW-1 07128!94 397 1741 -1344 430 -- -- 36 1 2 24 7 1 - --- 3 9 PACE MW-1 12/09/94 397 1789 -1392 2200 -- -- 36 74 37 17 -- 41 PACE MW-1 03103/95 397 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 04/12/95 397 1527 -1130 4700 --- 310 ND<5 0 79 450 --- 78 ATI MW-1 07/20/95 397 1557 -1160 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 -11 89 9400 --- 110 ND<5 0 ND<5 0 5 1 3900ATI 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 ND<50 – --- 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 -989 ND<50 ND<D 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<D 5 ND<1 0 ND<1 0 ND<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 D ND<1 0 3500 63 SPL MW-1 (1) 01/19/99 397 -- --_ --_ Blaine Tech Services, Inc Report 010119-K-1,BP Oil 11193 at 3202 W Hammer Lane Stockton Califomia Page 1