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Table 1 Groundwater Levels and Chemical Analysis Former Mobil Bulk Plant 04-343 I Well Date Top of Depth Ground- TPH-G TPH-D Benzene Toluene Ethyl- Total Fecal Lead Phenol Diethyl 2-HEX MTBE ID Casing to water (ppb) (ppb) (ppb) (ppb) benzene Xylenes Coliform (ppb) (ppb) Phthalate (ppb) (ppb} Elevation Water Elevation (ppb) (ppb) (ppb) (ppb) (feet) (feet) (feet) AW-12 04/02/93 31.56 10.00 21.56 NO 63 NO NO NO NO - 0527/93 10.08 21.46 NO ND 9.6 NO NO NO - 1028/'93 10.42 21.14 NO NO NO NO NO NO 01x21/94 10.38 21.18 NO NO NO ND NO NO - - - - - - 05/02/94 10.15 21.41 NO NO NO NO NO NO - - -- - - - 07/15/94 10.36 21.20 NO NO NO NO NO 0.80 - - - - - 10/08/94 10.58 20.98 NO NO NO NO NO NO - - -- - - " 01/12/95 10.24 21.32 NO ND NO NO NO NO - 04/20/95 10.35 21.21 87 56 2.1 7.8 5.6 23 - 08/16/95 10.45 21.11 NO ND NO NO NO NO - -- -- - - 10/24/95 10.54 21.02 NO NO NO NO NO NO - - - - - NO 0126/96 10.20 21.36 NO 87 0.77 NO NO NO - - - - - NO 04/12/96 1028 21.28 NO 160 NO NO NO NO -- - - - - 0.98 07/25/96 10.44 21.12 NO NO NO NO NO NO - - - - - NO 11/06/96 10.34 21.22 NO 60 NO 0.61 NO NO - - - - - NO I NOTES: ppb= parts per billion Top of casing elevations were surveyed in reference to a railroad splim set in an TPH-G= total petroleum hydrocarbons as gasoline island of the approximate centerline of East Grantllne Road 19.5 feet west from the TPH-13= total petroleum hydrocarbons as diesel centerline of the railroad spur tracks. Nil= not detected at or above method detection lmll All welts resurveyed on April 7.1992,by Land Improvement Services.April 7 and 24, not measured/not analyzed 1992,data reflect resurveyed elevations. 2-HEX= 2-Hexerr i-ot(E) sample reported as nol matching typical gasoline pattern •*= sample reported as not appearing to amain gasoline k. •• = well obstructed Page 12 0112 30-013GOW Date,1212186