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� W � � � � � � <br /> TABLE 1 (continued) <br /> Casing Depth Groundwater LPH Concentration(pg/L) <br /> Well Elevation to Water Elevation Thickness Ethyl- <br /> No Date (ft mst) (ft) (ft msl) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE <br /> V4 02/13/96 938 2474 -15 36 Sheen <br /> 04/18/96 2236 -1298 Sheen <br /> 08/08/96 23 60 -1422 Sheen <br /> 11/04/96 2402 -1464 000 3,200 24,000 2,900 16,000 120,000 <1,250 <br /> Trip 11/04/96 <0 5 <0 5 <0.5 <0 5 <50 <2 5 <br /> Blank <br /> Rinse 11/04/96 <0 5 <0 5 <0.5 <0 5 <50 <2 5 <br /> Blank <br /> a Water in well may be residual water in end cap <br /> b Unidentified hydrocarbons present <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 /> pg/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 /> XLS71942Q 1196 T 12 <br /> Page 24 <br />