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~ Table 4: Historic Groundwater Chemical Data for Monitoring Wells Nell No. Date Well Depth Depth to Casing elev. Water Elev. Floating TPHG Benzene Toluene Ethylbenzene Xylene Fuel Ox. TPHD Sampled (ft.) Water(ft.) (MSLft.)' (MSL ft.) Product (ug/L) (ug/L) (ug1L) (ug/L) (ug/L) (ug/L) (ug/L) MW1 9/12/2001 20.97 8.41 45.09 36.68 None ND ND ND ND ND ND ND MW1 12/14/2001 20.97 8.20 45.09 36.89 None ND ND ND ND ND ND ND MW1 3/21/2002 20.97 7.99 45.09 37.10 None ND ND ND ND ND ND ND MW2 9/12/2001 25.05 7.89 45.41 37.52 None ND ND ND ND ND ND ND MW2 12/14/2001 25.05 7.61 45.41 37.8 None ND ND ND ND ND ND ND MW2 3/21/2002 25.05 7.44 45.41 37.97 None ND ND ND ND ND ND ND MW3 9/12/2001 24.81 8.19 46.01 37.82 None 58 ND ND ND ND ND 440 MW3 12/14/2001 24.81 7.95 46.01 38.06 None ND ND ND NDND ND 170 MW3 3/21/2002 24.81 7.62 46.01 38.39 None ND ND ND ND ND ND ND Table 5.Historic Groundwater Chemical Data for Offsite Water Wells Well No. Date TPHG Benzene Toluene Ethylbenzene Xylene Fuel Ox. TPHD (ug/L) (ug/L) (ug L) (ug/) (ug/L) (ug/L) (ugIL) Sampled OW1 4/16/2002 ND ND ND ND ND ND ND' OW1 4/15/2002 ND ND ND ND ND ND ND OW2 2/7/2002 ND ND ND ND ND ND ND OW2 4/16/2002 ND ND ND ND ND ND ND 1 Page 5