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• . � `� I Table 2 y HISTORIC GROUNDWATER LEVELS AND CHEMICAL ANALYSIS RESULTS August 2003 Through November 2003 Former BP Oil 11192 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water in 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg11) (µg/1) (41) (µg11) (µg/1) (µg/1) (µg/1) MW-1 8114103 500 1531 000 -1031 -- -- ND<250 ND<2 5 ND<2 5 ND<2 5 ND<5 0 -- ND<10 11/26/03 500 16 18 0 00 -1118 -087 __ ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<2 0 MW-3 8/14103 568 1604 000 -1036 -- -- rm<10000 ND<100 ND<100 ND<100 ND<200 -- ND<400 11/26/03 568 1696 000 -1128 -0 92 -- Nn<IwOO ND<100 ND<100 ND<100 ND<200 -- ND<400 MW-4 8/14103 621 1651 000 -1030 -- - ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 42 11/26/03 621 1837 0 00 -1216 -186 -- 130 ND<0 50 0 70 ND<0 50 ND<1 0 71 MW-5 8114/03 563 1581 000 -1018 -- 61 ND<0 50 ND<0 50 ND<0 50 ND<1 0 - 23 11/26/03 563 1671 000 -1108 -090 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 6 9 MW-6 8/14/03 528 1543 000 -10 15 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<0 11/26/03 528 1629 000 -1101 -086 -- 50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 7 3 MW-7 8114/03 569 1607 000 -1038 -- ND<10000 ND<100 ND<100 ND<100 ND<200 -- ND<400 11/26/03 569 1697 000 -1128 -090 -- ND<20000 ND<200 ND<200 ND<200 ND<400 -- ND<800 MW-8 8/14103 479 1496 0 00 -1017 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 11/26/03 479 1583 000 -1104 -087 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 MW-9 8/14/03 426 1481 0 00 -1055 -- -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 11/26/03 426 1572 000 -1146 -091 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 MW-10 8/14/03 406 1443 000 -1037 -- -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND-<l 0 ND<2 0 11192 Pagel of 2