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Table 2 HISTORIC GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS August 2003 Through November 2003 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 8021B 8260B Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (µg11) (4g/1) (µg11) (µg11) (µg11) (Ag/1) MW-1 8/14/2003 500 153t 000 -1031 -- -- ND<250 ND<2 5 ND<2 5 ND<2 5 ND<5 0 -- ND<10 11/26/2003 500 16 18 000 -11 18 -087 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 MW-3 8/14/2003 568 1604 000 -1036 -- .- rm<10000 ND<100 ND<100 ND<100 ND<200 -- ND<400 11/26/2003 568 1696 000 -1128 -0 92 -- ND<10000 ND<100 ND<100 ND<100 ND<200 -- ND<400 MW-4 8/14/2003 6 21 1651 000 -1030 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- 42 11/26/2003 6 21 1837 000 -1216 -186 -- 130 ND<0 50 0 70 ND<0 50 ND<l 0 -- 71 MW-5 8/14/2003 5 63 1581 000 -1018 -- -- 61 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 23 11/26/2003 563 1671 000 -1108 -090 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- 6 9 MW-6 8/14/2003 5 28 1543 000 -1015 -- -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 11/26/2003 528 1629 000 -1101 -086 -- 50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- 73 MW-7 8/14/2003 569 1607 000 -1038 -- -- rroa0000 ND<100 ND<100 ND<100 ND<200 -- ND<400 11/26/2003 569 1697 000 -1128 -090 -- Nn<20000 ND<200 ND<200 ND<200 ND<400 -- ND<800 MW-8 8/14/2003 479 1496 000 -1017 -- -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 — ND<2 0 11/26/2003 479 15 83 000 -1104 -087 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 i MW-9 8/14/2003 426 14 81 000 -1055 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 11/26/2003 426 1572 000 -1146 -091 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 I , MW-10 8/14/2003 4 06 1443 000 -1037 -- -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 11192 Page 1 of 2