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a1 • <br /> Groundwater Monitonng Data and Analytical Results <br /> Chevron Service Station#9-2033 <br /> 508 West Charter Way <br /> Stockton,California <br /> EXPLANATIONS <br /> Groundwater monitonng data and laboratory analytical results prior to May 31,2000,were compiled from reports prepared by Blaine Tech Services Inc <br /> TOC=Top of Casing B=Benzene Cd=Cadmium TBA=Tertiary butyl alcohol <br /> (ft)=Feet T=Toluene Cr=Chromium DIPE=Di-isopropyl ether <br /> GWE=Groundwater Elevation E=Ethylbenzene Ni=Nickel TAME=Tertiary amyl methyl ether <br /> (msl)=Mean sea level X=Xylenes Pb=Lead ETBE=Ethyl tertiary butyl ether <br /> DTW=Depth to Water MTBE=Methyl tertiary butyl ether Zn=Zinc <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel 1,2-DCA= 1,2-Dichloroethane (pph)=Parts per billion <br /> TPH-G=Total Petroleum Hydrocarbons as Gasoline TOG=Total Oil and Grease =Not Measured/Not Analyzed <br /> TOC elevation altered due to wellhead maintenance on May 21, 1998 <br /> i Chromatogram pattem indicates an unidentified hydrocarbon <br /> 2 2-Methylnaphtalene and Naphthalene were 8 7 and 33 ppb respectively <br /> I 2-M ethyl naphtalene and Naphthalene were 8 7 and 50 ppb respectively <br /> ° Naphthalene was detected at 34 ppb <br /> 5n 35 b respectively <br /> 2-Methyl naphtalene and Naphthalene were 5 3 and pp p y <br /> 6 Ethanol,TBA,DIPE,TAME and ETBE by EPA 8260 were not detected,see lab report for detection limits <br /> 7 MTBE by EPA Method 8260 <br /> 8 Diethylphthalate was detected at 6 9 ppb <br /> 9 Naphthalene was detected at 6 8 ppb <br /> 11' Due to laboratory error,TPH-D was not analyzed <br /> 11 Odor <br /> 12 Laboratory report indicates unidentified hydrocarbons>C16 <br /> 17 Laboratory report indicates gasoline C6-C12 <br /> 14 Semrvolatile Organic Compounds(SVOCs)by EPA Method 8270 were ND,except for Bis(2-ethylhexyl)phthalate was detected at 27 ppb <br /> i` Volatile Organic Compounds(VOCs)by EPA Method 8010 were less than the reporting limit <br /> 16 SVOCs by EPA Method 8270 were less than the reporting limit,except for Bis(2-ethylhexyyl)phtalate was detected at 12 ppb <br /> 17 VOCs by EPA Method 8010 were less then the reporting limit,except for Chloroform which was detected at 1 7 ppb <br /> iB Laboratory report indicates gasoline C6-C12+unidentified hydrocarbons<C6 <br /> i <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 xlsl#386847 5 As of 02/15/01 <br />