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TABLE1-SUMMARY OF RESULTS OF GROUNDWATER MONITORING WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPN-D TPH B T E X MTBE HVOC DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ug11) (ugll) (ugll) (ug") (ugll) (ug/1) (ug/1) (ugll) (ugll) (ppm) MONITORING (Feet) (Feet) (Feet) MW-2 12/21/92 482 2126 -1644 1500 – --- 120 96 10 24 -- -- – -- MW-2 04/04/93 482 1845 -1363 2600 --- -- 460 13 77 81 — — – PACE MW-2 04/26/93 482 18 11 -1329 -- -- — -- --- --- -- -- -- -- MW-2 10/05/93 482 11385 -1403 1500 --- — 3200 120 540 710 — — -- PACE MW-2 01/07/94 482 1848 -1366 1900 – -- 400 13 56 79 410 (c) – – PACE MW-2 04120/94 482 1782 -1300 18000 – -- 3700 120 610 900 710D (c) --- 43 PACE MW-2 04/25/94 482 1780 -1298 -- - - — -- --- --- - --- --- --- MW-2 07/28/94 482 1814 -13 32 28000 --- — 5300 80 750 340 -- — 43 PACE MW-2 12109/94 482 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 04/12195 482 1623 -1141 1800 -- – 360 33 70 50 — -- 76 ATI QC-1 (d) 04/12/95 -- — --- 1900 -- – 360 32 70 51 — -- --- ATI MW-2 07/20195 482 1645 -1163 8800 (e) -- - 1600 22 290 290 -- --- 64 ATI QC-1 (d) 07/20195 -- --- -- 7200 (e) -- – 1300 17 240 240 -- — -- ATI MW-2 11/02195 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 01/16/96 482 1666 -1184 2000 --- --- 300 86 62 48 3200 — -- ATI: QC-1 (d) 01/16196 --- -- --- 2000 – --- 290 84 59 44 3000 — --- ATI MW-2 04/22/96 482 1482 -1000 680 --- --- 140 4 36 12 1700 — -- SPL QC-1 (d) 04/22/96 — -- -- 490 -- – 130 3 34 11 2100 — -- SPL MW-2 07112/96 482 1512 -1030 4800 -- – 890 19 190 52 190DO -- 22 SPL QC-1 (d) 07112/96 --- --- -- 5300 --- – 990 21 220 55 20000 -- --- SPL MW-2 11/14/96 482 1603 -1121 24000 – --- 590 25 70 ND<25 18000 --- 29 SPL QC-1 (d) 11114/96 -- --- --- 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) 05/22/97 -- --- — 2800 --- – 77 1 1 95 21 3400 -- -- SPL MW-2 08/06197 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 -- 60 SPL QC-1 (d) 01/07/98 -- --- --- 12 --- --- 110 ND<1 0 ND<1 0 23 18000 --- -- SPI. MW-2 07101/98 482 1078 -596 1200 — – 22 ND<1 0 21 ND<1 0 4900 - 48 SPL QC-1 (d) 07/01/98 -- --- -- 1000 --- – 22 N0<10 19 ND<1 0 4800 --- SPL MW-2 09/18/98 482 1251 -769 12000 --- -- 69 1 8 ND<100 77 14000 — 56 SPL QC-1 (d) 09/18198 -- --- --- 13000 --- -- 56 17 ND<100 59 15000 — -- SPL MW-2 01119199 482 1251 -769 3500 -- --- ND<1 0 ND<1 0 ND<1 0 ND<1 0 3600 -- – SPL MW-2 0) 10/14/99 482 1339 -857 -- - -- -- --- --- — – --- --- Blaine Tech Services Inc,Report 000714-U-1 BP Oil 11193 at 3202 W Hammer Lane,Stockton,California Page 2