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Tab,W <br /> - Groundwater Monitoring qW and Analytical Results <br /> Chevron Service Station#9-2033 <br /> 508 West Charter Way <br /> Stockton,California <br /> EXPLANATiONS <br /> Groundwater monitoring data and laboratory analytical results prior to May 31,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> 10C= fop of Casing E=Ethylbenzene Pb=Lead <br /> (ft)=feet X=Xylenes Zn=Zinc <br /> GWE—Groundwater Elevation - <br /> MTBE=Methyl tertiary butyl ether --=Not Measure <br /> dMot Analyzed <br /> (msl)=Mean sca level 1,2-DCA= 1,2-Dichloroethane TBA=Tertiary butyl alcohol <br /> DTW=Depth to Water (ppb)=Parts per billion RIPE=Di-isopropyl ether <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel TOG=Total Oil and Grease TAME=Tertiary amyl methyl ether <br /> TPH-G=Total Petroleum Hydrocarbons as Gasoline Cd=Cadmium ETBE=Ethyl tertiary butyl ether <br /> B=Benzene Cr=Chromium QA=Quality Assurance/Trip Blank <br /> T=Toluene Ni=Nickel <br /> TOC elevation altered due to wellhead maintenance on May 21, 1998 <br /> ' Chromatogram pattern indicates an unidentified hydrocarbon <br /> '- 2-Metliylnaphtalene and Naphthalene were 8 7 and 33 ppb respectively <br /> z 2-Metliylnaphtalene and Naphthalene were 8 7 and 50 ppb respectively <br /> Naphthalene was detected at 34 ppb <br /> 5 2-Methylnaphtalene and Naphthalene were 5 3 and 35 ppb respectively <br /> F Ethanol TBA DiPE,TAME and ETBE by EPA 8260 were not detected see lab report for detection limits <br /> 7 M 1 BE by EPA Method 8260 <br /> B Diethylphthalate was detected at 6 9 ppb <br /> 9 Naphthalene was detected at 6 8 ppb <br /> 10 Due to laboratory error,TPH-D was not analyzed <br /> " Odor <br /> 'Z Laboratory report indicates unidentified hydrocarbons>C 16 <br /> 13 Laboratory report indicates gasoline C6-C 12 <br /> 14 All other Semivolatile Organic Compounds(SVOCs)by EPA Method 8270 were ND,except For Bis(2-ethylhexyl)phthalate was detected at 27 ppb <br /> 15 All other Volatile Organic Compounds(VOCs)by EPA Method 8010 were less than the reporting limit <br /> 16 All other SVOCs by EPA Method 8270 were less than the reporting limit,except for B i s(2-ethyl hexyyl)phthal ate was detected at 12 ppb <br /> 17 All other VOCs by EPA Method 8010 were less then the reporting limit,except for Chloroform which was detected at 17 ppb <br /> 1R Laboratory report indicates gasoline C6-C12+unidentified hydrocarbons<C6 <br /> 19 Laboratory report indicates that this sample was analyzed outside of the EPA recommended holding time <br /> 20 All sample containers were broken on this date <br /> 9-2033\19/#386847 7 As of 05/09/05 <br />