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i • • 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 LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) OWL) (ug/L) (ug/L) (ug/L) (ppm) MONITORING (Feet) (Feet) (Feet) MW-5 04125/94 438 1740 -1302 170 --- -- 34 10 ND<O 5 81 11 (0) --- 39 PACE MW-5 07/28/94 438 1786 -1348 1000 — — 440 19 10 38 ND<5 0 (o) — 39 PACE QC-1 (d) 07/28194 --- --- — 1200 — — 470 23 11 46 --- --- --- PACE MW-5 12/09/94 438 1834 -1396 930 — — 260 53 31 21 — — 46 PACE QC-1 (d) 12/09/94 --- — — 1000 — --- 280 6 34 24 --- --- — PACE MW-5 03/03/95 438 1699 -1261 1200 — — 450 74 59 28 — — 54 ATI MW-6 04/12/95 438 1571 -1133 N D<50 --- — 90 N D<0 50 26 15 — — 79 ATI MW-5 07/20/95 438 1600 -1162 4100 (e) --- — 220 ND<5 0 28 ND<10 --- -- 67 ATI MW-5 11/02/95 438 1690 -1252 220 — — 44 14 87 74 ND<5 0 — 36 ATI MW-5 01/16/96 438 1627 -1189 160 — — 47 30 13 11 ND<5 0 --- — ATI MW-5 04/22196 438 1417 -979 100 — — 48 3 6 11 ND<10 — — SPL MW-5 07/12/96 438 1446 -1008 960 --- --- 320 38 78 422 31 -- 29 SPL MW-5 11/14/96 438 1536 -1098 560 --- — 180 ND<1 0 49 17 19 — 31 SPL MW-5 03/11197 438 1242 -804 ND<50 --- — 052 ND<1 0 ND<1 0 ND<1 0 ND<10 --- 37 SPL MW-5 05/22/97 438 1304 -866 60 — — ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 — 49 SPL MW-5 08/06/97 438 1390 -952 --- — --- --- --- — — --- — 62 --- MW-5 09/22/97 438 1399 -961 ND<50 — --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 — 70 SPL QC-1 (d) 09/22/97 — --- — ND<50 — --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 --- — SPL MW-5 01107/98 438 1398 -960 ND<50 -- --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 — 63 SPL MW-5 07/01/98 438 1036 -598 ND<50 --- -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 11 --- 56 SPL MW-5 09/18/98 438 1190 -752 ND<50 -- -- 32 ND<1 0 ND<1 0 ND<1 0 ND<10 — 59 SPL MW-5 01/19/99 438 1211 -773 70 --- — ND<1 0 ND<1 0 ND<1 0 ND<1 0 65 -- --- SPL MW-5 10/14/99 438 1305 -867 610 — — ND<1 0 ND<1 0 ND<1 0 ND<1 0 640 --- — SPL MW-5 01/20/00 438 1285 -847 ND<50 — — ND<0 5 ND<0 5 ND<0 5 ND<O 5 50 — --- PACE MW-5 05/04/00 438 1025 -687 ND<50 --- --- ND<0 5 ND<0 5 ND<0 5 ND<O 5 17 -- — PACE MW-5 07114/00 438 1185 -747 140 — — ND<0 5 ND<0 5 ND<0 5 ND<O 5 360 — — PACE MW-5 10/27/00 466 (n) 1276 -810 100 --- --- ND<0 5 ND<0 5 06 098 130 — — PACE MW-5 01/19/01 466 1259 -793 ND<50 --- --- ND<0 5 ND<0 5 ND<O 5 ND<O 5 515 -- --- PACE MW-5 04/23/01 466 1160 -694 ND<50 — — ND<0 5 ND<0 5 ND<0 5 ND<1 5 247 — — PACE MW-5 07/27/01 466 1280 -814 1400 --- -- ND<2 5 ND<2 5 ND<2 5 ND<7 5 1810 — -- PACE MW-5 11/01/01 466 1389 -923 1800 — — ND<0 5 ND<0 5 ND<0 5 ND<1 5 2490 -- -- PACE Blaine Tech Services,Inc,Report 011101-K-1,BP Oil 11193 at 3202 W Hammer Lane,Stockton,California Page 6