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r <br /> TABLE KEY <br /> STANDARD ABREVIATIONS ; <br /> = not analyzed, measured, or collected k <br /> E=' <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 /> K <br /> mgll — milligrams per liter(approx. equivalent to parts per million,ppm) F <br /> ND< = not detected at or above laboratory detection limit <br /> TOC = top of casing(surveyed reference elevation) <br /> ANALYTES <br /> BTEX = benzene,toluene, ethylbenzene, and(total)xylenes <br /> DIPE = di-isopropyl ether i <br /> ETBE 4 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 r <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 f <br /> 1,1-DCA = 1,1-dichloroethane <br /> 1,2-DCA = 1,2-dichloroedme(same as EDC,ethylene dichloride) E <br /> 1,1-DCE = 1,1-dichloroethene <br /> 1,2-DCE = 1,2-dichloroethene(cis-and trans-) <br /> NOTES 11 <br /> 1 <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 /> :j <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 /> G. Other laboratory flags(qualifiers)may have been reported. See the official laboratory report(attached)for a =1 <br /> complete list of laboratory flags. f <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 's <br /> reporting limits stated in the official laboratory report. <br /> r <br /> 8. Groundwater vs. Time graphs may be corrected for apparent level changes due to resurvey. : <br /> REFERENCE <br /> TRC began groundwater monitoring and sampling for Former BP Oil 11195 in October 2003. Historical data compiled prior to <br /> 1 that time were provided by Gettler-Ryan Inc. <br /> tai <br /> j <br />