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TABLE 1 (continued) <br /> Casing Depth Groundwater LPH Concentration (Vg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- - <br /> No Date (ft ms]) (ft) (ft msl <br /> (ft) Benzene Toluene benzene Xylenes TPH-= MTBE <br /> Trip 11/11/97 <0 5 <0 5 <0.5 <0 5 <50 <2 5 <br /> Blank <br /> Rinse 11/11/97 <0 5 <0 5 <0 5 <0 5 <50 <2 5 <br /> Blank <br /> a Water in well may be residua] water in end cap <br /> b Unidentified hydrocarbons present <br /> c Hydrocarbons ranging from C6-C12 identified on the gasoline sample chromatogram, <br /> indicating the presence of weathered gasoline in the sample <br /> d Analytical results may be incorrect due to possible mislabeling of samples for UVB-MWI and UVB-MW2 <br /> Resampled on 2 October 1997 <br /> * Confirmatory value,calculated by EPA Method 8260 <br /> ft msl Feet relative to mean sea level <br /> LPH Liquid-phase hydrocarbons <br /> MTBE Methyl t-butyl ether <br /> TPH-g Total Petroleum Hydrocarbons as gasoline <br /> lig/L Micrograms per liter <br /> -- Not measured, not sampled,or not analyzed <br /> Note Groundwater elevations adjusted for LPH, when present <br /> Data from 1187 from HLA <br /> Water sample taken from SW2 on 17 February 1994 was labeled as AS2 on chain of custody and laboratory results <br /> X LS71942Q 11977'12 <br /> i'rbe 18 <br />