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TABLE 1 (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 /> UVB-MW2 03/03/98 775 <20* <br /> 05/20/98 15 82 -807 000 2,500 180 950 1,300 16,000 560 <br /> 05/20/98 <14* <br /> 08/19/98 1703 -928 000 14 4 8 2 7 24 250 16 <br /> 08/19/98 <2 0* <br /> 11/18/98 1753 -9 78 000 230 8 0 25 23 760 <25 <br /> 03/30/99 1663 -8 88 000 805 76 1 366 240 6,290 <20 <br /> 05/05/99 1612 -837 0.00 693 366 457 225 5,510 35.8 <br /> Trip 05/05/99 <0 5 <0 5 <0 5 <0 5 <50 <2 0 <br /> Blank <br /> a Water in well may be residual water in end cap <br /> b Unidentified hydrocarbons present <br /> c Hydrocarbons ranging from C6-C12 identified on the gasoline sample chromatogram <br /> d Analytical results may be incorrect due to possible mislabeling of samples for UVB-MW 1 and UVB-MW2 <br /> Resampled on 2 October 1997 <br /> e Gas and unidentified hydrocarbons ranging from C6-C8 identified on the gasoline sample chromatogram <br /> f Analyzed outside of hold time <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 /> µg/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 Q599 T1 XLS Page 31 <br /> I <br />