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� • • -s Table 2 HISTORIC GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS August 2003 Through February 2004 Former BP Oil 11192 Date TOC Depth to LPH Ground- Change in TPH-G TPPH Benzene Toluene Ethyl. Total MTBE MTBE Comments Sampled Elevation Water Thickness water Elevation 8260B benzene Xylenes 8021E 8260B Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (lcg/l) (µ911) (µall) (µg11) (µg/1) (µg11) (µg/1) MW-1 8/14/03 500 1531 400 -10 31 -- ND<250 ND<2 5 ND<2 5 ND<2 5 ND<5 0 ND<10 11/26/03 500 1618 000 -1118 -087 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<10 ND<2 0 2123104 500 1483 000 -983 135 ND<100 ND<10 ND<1 0 ND<1 0 ND<2 0 ND<4 0 MW-3 8/14/03 568 1604 000 -1036 -- ND<10000 ND<100 ND<100 ND<100 ND<200 ND<400 11/26/03 568 1696 000 -1128 -092 ND<10000 ND<100 ND<100 ND<100 ND<200 ND<400 2123104 568 1560 000 -992 136 ND<10000 ND<100 ND<100 ND<100 ND<200 ND<400 MW-4 8114103 621 1651 0 00 -1030 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 42 11/26/03 621 1837 000 -1216 -186 I30 ND<O 50 070 ND<O 50 ND<1 0 71 2123104 621 1587 000 -966 250 ND<50 ND<O 50 ND<O 50 ND<O 50 NDM 0 20 MW-5 8114103 563 1581 000 -1018 — 61 ND<O 50 ND<O 50 ND<O 50 ND<1 0 23 11/26/03 563 1671 000 -1108 -090 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<10 69 2123104 563 1535 000 -972 136 ND<50 ND<0 50 068 ND<O 50 17 40 MW-6 8/14/03 528 1543 000 -1015 -- ND<50 ND<O 50 ND<0 50 ND<0 50 ND<10 ND<2 0 11/26/03 528 1629 000 -1101 -086 50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 73 2123104 528 1481 000 -953 148 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 3 1 MW-7 8/14103 569 1607 000 -1038 -- NfD<10M0 ND<100 ND<100 ND<100 ND<200 ND<400 11/26/03 569 1697 000 -1128 -090 1Doaro ND<200 ND<200 ND<200 ND<400 ND<800 2/23104 569 1563 000 -994 134 ND<00 a ND<100 ND<100 ND<100 ND<200 ND<400 MW-8 8114103 479 1496 000 -1017 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND 11192 Page I of 2