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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through August 2004 Pormer BP Otl 11192 Date TOC Depth to LPH Ground- Change TPH-G 'IDPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thtclrness water to 9260B benzene Xylenes 8021E 8260E Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) WA) (99n) (µpi) (µg/l) (98/1) (ug/l) (µgA) MW-6 continued 12/09/91 580 3042 000 -2462 -- 03/09/92 580 2953 000 -2373 089 06/19/92 580 2924 000 -2344 029 ND<50 — ND<O 5 ND<O 5 ND<O 5 ND<O 5 — — 09/18/92 580 3103 000 -2523 -179 ND<50 — ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- — 12/09/92 580 3142 000 -2562 -039 ND<50 — ND<O 5 ND<O 5 ND<O 5 ND<O 5 •- .- 03/11/93 580 2995 000 -23 15 247 ND<50 -- ND<O 5 ND<0 5 ND<O 5 ND<O 5 06/15/93 580 2691 000 -21 11 204 ND<50 -• ND<O 5 ND<O 5 ND<O 5 ND<O 5 09/15/93 580 2729 000 -2149 -038 12/22/93 580 2717 000 -2137 012 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 04/01/94 580 2629 000 -2049 088 07/27/94 5 80 2632 000 -2052 -003 ND<50 — ND<O 5 ND<O 5 ND<0 5 ND<O 5 ND<5 0 — 11/30/94 580 2680 000 -2100 -048 02/15/95 580 2573 000 -1993 107 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<l 0 04/21/95 580 2374 000 -1794 199 07/21/95 580 2298 000 -1718 _ ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<1 0 10/20/95 580 2339 000 -1759 -041 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<1 0 67 .- 04/23/96 580 2000 000 -1420 339 ND<500 -- ND<5 ND<5 ND<5 I3 2700 -- 07/I2/96 580 2022 000 -1442 -022 .- _- 10/18/96 5 80 1942 000 -1362 080 2300 -- 10 ND<1 0 ND 02/26/98 580 1160 000 -580 782 490 -- ND<O 5 ND<1 0 ND<1 0 ND<1 0 590 -_ 07/07/98 580 1155 0 00 -575 005 ND<50 -- ND<O 5 ND<1 0 ND<1 0 ND<1 0 ND 01/19/99 580 1349 000 -769 -194 7300 -- ND<1 0 ND<1 0 ND<1 0 ND<l 0 9700 -- 07/14/99 580 1255 000 -675 094 1000 — ND< 0 ND<1 0 ND<1 0 ND<l 0 1100 — I0/07/99 580 1410 000 -830 __ 4900 — ND<1 0 ND<1 0 ND<10 ND<l 0 4200 — I 111e2 • Page 9� I