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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER MONITORING • r WELL DATEOF CASING DEPTH TO GROUNDWATER TPH-G TPH-D TPH B T E X MTBE HVOC DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ugA) (UgA) NO (UgA) (UgA) (UgA) (UgA) (ug11) (UgA) (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 2500 --- --- 460 13 77 81 --- - --- PACE MW-2 04/26/93 482 18 11 -1329 --- --- --- --- --- -- MW-2 MW-2 10/05/33 482 18 85 -1403 1500 -- --- 3200 120 540 710 -- --- --- PACE MW-2 01/07/34 482 1848 -1366 1900 400 13 56 79 410 (c) --- --- PACE MW 2 04/20/94 482 1782 -1300 18000 --- — 3700 120 610 900 7100 (c) --- 43 PACE MW-2 04/25/94 482 1780 -1298 --- - -- --- --_ --- --- --- --- --- MW 2 07/28/94 482 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 04/12/95 482 1623 -1141 1800 --- - 360 33 70 50 --- --- 76 ATI QC-1 (d) 04/12/95 --- --- -- 1900 — 360 32 70 51 -- --- ATI MW-2 07/20/95 482 1645 -1163 8800 (e) --- - 1600 22 290 290 --- --- 64 ATI QC-1 (d) 07/20/95 --- --- --- 7200 (e) - --- 1300 17 240 240 -- --- --- ATI MW-2 11102195 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) 01/16/96 --- --- -- 2000 -- --- 290 84 59 44 3000 --- --- ATI MW-2 04/22/96 482 14 82 -1000 680 -- --- 140 4 36 12 1700 --- --- SPL QC-1 (d) 04/22/96 --- -- --- 490 -- --- 130 3 34 11 2100 --- --- SPL MW-2 07/12/96 482 1512 -1030 4800 --- 890 19 190 52 19000 --- 22 SPL QC-1 (d) 07/12/96 --- --- --- 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) 11/14/96 --- --- --- 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 00-1 (d) 05/22/97 --- --- --- 2800 --- --- 77 11 95 21 3400 --- SPL MW-2 08/06/97 482 1432 -950 --- --- --- -__ MW-2 09/22/97 482 1341 -859 2400 --- - 730 10 79 74 2100 - 65 SPL MW-2 01/07/98 482 1437 -956 16 --- -- 90 ND<5 0 ND<5 0 ND<5 0 17000 — 60 SPL QC-1 (d) 01/07/98 --- -- --- 12 --- 110 ND<10 ND<1 0 23 18000 --- --- SPL MW-2 07/01/98 482 1078 -596 1200 --- - 22 ND<10 21 ND<10 4900 --- 48 SPL QC-1 (d) 07/01/98 --- --- --- 1000 --- - 22 ND<10 19 ND<10 4800 - --- SPL MW-2 09/18/98 482 112511 -769 12000 --- --- 69 18 ND<100 77 14000 56 SPL QC-1 (d) 09/18/98 --- --- --- 13000 --- -- 56 1 7 ND<100 59 15000 - --- SPL MW-2 01/19/99 482 1251 -769 3500 --- --- ND<1 0 ND<10 ND<10 ND<10 3600 — -- SPL MW-2 (I) 10/14/99 482 1339 -857 - --- --- --_ --- --- --- Blaine Tech Services,Inc,Report 991014-C-1, BP Oil 11193 at 3202 W Hammer Lane,Stockton,California Page 2