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TABLE KEY <br /> STANDARD ABREVIATIONS <br /> not analyzed,measured, or Collected <br /> LPH liquid-phase hydrocarbons <br /> Trace = less than 0 01 foot of LPH in well <br /> µg11 = micrograms per liter(approx equivalent to parts per billion,ppb) <br /> mg/1 = milligrams per hter(approx equivalent to parts per million,ppm) <br /> ND[ = not detected at or above laboratory detection limit <br /> TOC = top of casing(surveyed reference elevation) <br /> ANALYTES <br /> BTEX = benzene,toluene,ethylbeiizene,and(total)xylenes <br /> DIPS = di-isopropyl ether <br /> ETBE = ethyl tertiary butyl ether <br /> MTBE = methyl tertiary butyl ether <br /> PCB = polychlorinated biphenyls <br /> PCE = tetrachloroethene <br /> TBA = tertiary butyl alcohol <br /> TCA = trichloroethane <br /> TCE = trichloroethene <br /> TPH-G = total petroleum hydrocarbons with gasoline distinction <br /> TPH-D = total petroleum hydrocarbons with diesel distinction <br /> TPPH = total purgeable petroleum hydrocarbons <br /> TRPH = total recoverable petroleum hydrocarbons <br /> TAME = tertiary amyl methyl ether <br /> 1,1-DCA = 1,1-hchloroetbane <br /> . 1,2-DCA 1,2-dichloroethane(same as EDC,ethylene dichlonde) <br /> 1,1-DCE = I,l�hchloroethene <br /> 1,2-DCE = 1,2-dtchloroethene(cis-and trans-) <br /> NOTES <br /> 1 EIevations are in feet above mean sea level Depths are in feet below surveyed top-of-casing <br /> 2 Groundwater elevations for wells with LPH are calculated as Surface Elevation-Measured Depth to Water_+ <br /> MR x LPH Thickness),where Dp is the density of the LPH,if known A value of 0 75 is used for gasoline and <br /> when the density is not known A value of 0 83 is used for diesel <br /> 3 Wells with LPH are generally not sampled for laboratory analysis(see General Field Procedures) <br /> 4 Comments shown on tables are general Additional explanations may be included in field notes and laboratory <br /> reports,both of which are included as part of this report <br /> 5 A"J"flag indicates that a reported analytical result is an estimated concentration value between the method <br /> detection limit(MDL)and the practical quantification limit(PQL)specified by the laboratory <br /> 6 Other laboratory flags(qualifiers)may have been reported See the official laboratory report(attached)for a <br /> complete list of laboratory flags <br /> 7 Concentration graphs based on tables(presented following Figures)show non-detect results prior to the Second <br /> Quarter 2000 plotted at fixed values for graphical display Non-detect results reported since that time are plotted at <br /> reporting limits stated in the official laboratory report <br /> 8 Groundwater vs Time graphs may be corrected for apparent level changes due to resurvey <br /> 9 Historical data has been validated for this report Values presented m the following tables supersede those from <br /> previous reports <br /> REI+ERENCE <br /> TRC began groundwater monitoring and sampling for Former 76 Station 6981 in October 2003 Histoncal data compiled prior to <br /> that time were provided by Gettler-Ryan Inc <br />