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TABLE KEY <br /> STANDARD ABREVIATIONS <br /> -. = not analyzed,measured,or collected <br /> LPH = hquid-phase hydrocarbons <br /> Trace = less than 0 01 foot of LPH in well <br /> 99/1 = micrograms per liter(approx equivalent to parts per billion,ppb) <br /> ing/l = milligrams per liter(approx equivalent to parts per million,ppm) <br /> NDC = not detected at or above laboratory detection hmit <br /> TOC = top of casing(surveyed reference elevation) <br /> ANALYTES <br /> BTEX = benzene,tohiene,ethylbenzene,and(total)xylenes <br /> DIPE = di-isopropyl ether <br /> >r TBE = ethyl tertiary butyl ether <br /> MTBE = methyl tertiary butyl ether <br /> PCB = polychlonnated 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-dichloroethane <br /> 1,2-DCA = 1,2-dichloroethane(same as EDC,ethylene dichlonde) <br /> 1,1-DCH = 1,1-dichlomethene <br /> 1,2-DCE = 1,2- cbloroethene(cis-and trans-) <br /> NOTES <br /> 1 Elevations 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 /> (Dp 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 /> S 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 /> i <br /> 8 Groundwater vs Time graphs may be corrected for apparent level changes due to resurvey ' <br /> REFERENCE <br /> TRC began groundwater monnormg and sampling Former 76 Station 6981 in October 2003 Historical data compiled prior to that <br /> time were provided by Gettler-Ryan Inc <br /> E <br />