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TABLE I (continued) <br /> Casing Depth Groundwater LPH Concentration (pg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (ft msl) (ft) (ft msl) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> LPH Liquid-phase hydrocarbons <br /> MTBE Methyl t-butyl ether <br /> TPH-g Total Petroleum Hydrocarbons as gasoline <br /> pg/L Micrograms per liter <br /> -- Not measured, not sampled,or not analyzed <br /> Note Groundwater elevations adjusted for LPH,when present,using an average specific gravity of 0 75 for gasoline <br /> Data from 1/87 from HLA <br /> Water sample taken from SW2 on 17 February 1994 was labeled as AS2 on chain of custody and laboratory results <br /> 73942 Q1198 TI XLS <br /> Page 31 <br />