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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER MONITORING WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-D TPH B T E X MTBE HVOC DO LAS ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ug1l) (ug1l) (ug1l) (ug1l) (ugh) (ug/1) (ug/1) (ugll) (ug") (ppm) MONITORING (Feet) (Feet) (Feet) MW-2 12/21/92 482 21 26 -1644 1500 -- - 120 96 1 0 24 --- --- — -- MW-2 04104193 482 1845 -1363 2600 --- - 460 13 77 81 -- -- PACE MW-2 04/26/93 482 1811 -1329 — -- - --- --- -- --- -- - --- MW-2 10/05/93 482 1885 -1403 1500 -- - 3200 120 540 710 --- - -- PACE MW-2 01107194 482 1848 -1366 1900 -- -- 400 13 56 79 410 (c) --- -- PACE MW-2 04/20194 482 1782 -1300 18000 --- 3700 120 610 900 7100 (c) --- 43 PACE MW-2 04/25/94 482 1780 -1298 — - - -- — --- --- — - --- -- MW-2 07128194 482 1814 -1332 28000 --- - 5300 80 750 340 -- -- 43 PACE MW-2 12/09/94 482 1871 -1389 32000 - --- 4000 150 760 800 -- - 43 PACE MW-2 03/03/95 482 1735 -1253 2600 (e) - - 540 68 96 64 -- --- 49 ATI MW-2 04112/95 482 1623 -1141 1800 - - 360 33 70 50 --- 76 AT] QC-1 (d) 04/12/95 — --- -- 1900 -- - 360 32 70 51 -- -- -- ATI MW-2 07/20/95 482 1645 -11 63 8800 (e) -- - 1600 22 290 290 - -- 64 ATI QC-1 (d) 07/20/95 -- --- -- 7200 (e) - -- 1300 17 240 240 - --- -- ATI MW-2 11/02/95 482 1730 -1248 5000 — --- 780 14 150 140 7900 -- 52 ATI QC-1 (d) 11/02/95 -- -- — 4800 -- - 840 15 160 140 8400 -- — ATI MW-2 01116/96 482 1666 -1184 2000 --- — 300 86 62 48 3200 --- --- ATI QC-1 (d) 01/16196 ~- — --- 2000 — - 290 84 59 44 3000 --- — ATI MW-2 04/22196 482 1482 -1000 680 -- -- 140 4 36 12 1700 - --- SPL QC-1 (d) 04122/96 — --- — 490 - 130 3 34 11 2100 -- — SPL MW-2 07112196 482 1512 -1030 4800 -- — 890 19 190 52 19000 -- 22 SPL QC-1 (d) 07112/96 -- 5300 --- — 990 21 220 55 20000 --- — SPL MW-2 11/14196 482 1603 -1121 24000 -- 590 25 70 ND<25 18000 — 29 SPL QC-1 (d) 11114196 — --- -- 23000 --- - 570 ND<25 68 ND<25 21000 — --- SPL MW-2 03/11/97 482 1286 -804 770 - - 12 ND<5 0 ND<5 0 ND<5 0 970 — 40 SPL MW-2 05/22/97 482 1345 -863 2700 -- — 76 12 93 21 3100 -- 42 SPL QC-1 (d) 05122!97 -- --- -- 2800 -- -- 77 1 1 95 21 3400 - --- SPL MW-2 08/06/97 482 1432 -950 -- — --- -- -- --- --- — 63 -- MW-2 09/22/97 482 1341 -859 2400 - --- 730 10 79 74 2100 - 65 SPL MW-2 01/07/98 482 1437 -955 16 - --- 90 ND<5 0 ND<5 0 ND<5 0 17000 - 50 SPL QC-1 (d) 01/07/98 — --- --- 12 -- - 110 ND<1 0 ND<1 0 23 18000 -- -- SPL MW-2 07101/98 482 10 78 -596 1200 -- --- 22 ND<1 0 2 1 ND<1 0 4900 - 48 SPL QC-1 (d) 07/01/98 — --- --- 1000 - - 22 ND<10 19 ND<10 4800 -- SPL MW-2 09118/98 482 1251 -769 12000 -- --- 69 1 8 ND<100 77 14000 -- 56 SPL QC-1 (d) 09118/98 -- --- --- 13000 --- 56 17 ND<100 59 15000 - -- SPL MW-2 01119/99 482 1251 -769 3500 -- ND<1 0 ND<1 0 ND<1 0 ND<1 0 3600 -- - SPL MW-2 (I) 10114199 482 1339 -857 --- --- - - ~- - — --- --- --- ~" Blaine Tech Services,Inc Report 001027-X-1 BP Oil 11193 at 3202 W Hammer Lane Stockton California Page 2