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i <br /> TABLE KEY <br /> �s <br /> STANDARD ABBREVIATIONS <br /> -- = not analyzed,measured,or collected <br /> LPH — Iiquid-phase hydrocarbons <br /> Trace = less than 0.01 foot of LPH in well <br /> µg/1 — micrograms per liter(approx.equivalent to parts per billion,ppb) <br /> mg/l = milligrams per titer(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,ethylbenzene,and(total)xylenes <br /> DIPE = di-isopropyl ether <br /> ETBE = ethyl tertiary butyl ether <br /> MTBE = methyl tertiary butyl ether <br /> PCB = polychlorinated biphenyls <br /> PCE = tetrachloroethcne <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 dichloride) <br /> '} 1,1-DCE — 1,1-dichloroethene <br /> 1,2-DCE 1,2-dichloroethene(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+(Dp x <br /> LPH Thickness),where Dp is the density of the LPH,if known. A value of 0.75 is used for gasoline and when the <br /> 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 detection <br /> 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 /> &. 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 that <br /> time were provided by Gettler-Ryan Inc. <br />