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i MAV J <br /> Groundwater Monitoring Dd Analytical Results . <br /> Chevron Service StVKn#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 /> TOC=Top of Casing B=Benzene Cd=Cadmium TBA=Tertiary butyl alcohol <br /> (ft)=Feet T=Toluene Cr=Chromium DIPS=Di-isopropyl ether <br /> GWE 4 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-Mcbloroethane (ppb)=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 /> 1 Chromato <br /> gram pattern indicates an unidentified hydrocarbon <br /> 2 2-Methylnaphtatene and Naphthalene were 8 7 and 33 ppb respectively <br /> 3 2-Methylnaphtalene and Naphthalene were 8 7 and 50 ppb respectively <br /> Naphthalene was detected at 34 ppb <br /> ` 2-Methylnaphtalene and Naphthalene were 5 3 and 35 ppb respectively <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 /> 10 Due to laboratory error,TPH-D was not analyzed <br /> " Odor <br /> '2 Laboratory report indicates unidentified hydrocarbons>C16 <br /> 13 Laboratory report indicates gasoline C6-C12. <br /> 14 <br /> All other Semivolattle Organic Compounds(SVOCs)by EPA Method 8270 were ND,except for Bis(2-ethylhexyl)phthalate was detected at 27 ppb <br /> 1i All other Volatile Organic Compounds(VOCs)by EPA Method 8010 were less than the reporting limit <br /> t6 All other SVOCs b EPA Method 8270 were less than the reporting porting limit,except for Bis(2-ethyihexyyl)phtalate was detected at I2 ppb <br /> 17 All other VOCs by EPA Method 8010 were less then the reporting Urnit,except for Chloroform which was detected at 17 ppb <br /> iR Laboratory report indicates gasoline C6-C12+unidentified hydrocarbons<C6 <br /> '9 Laboratoryort indicates that this sample was <br /> rep p analyzed outside of the EPA recommended holding time <br /> 20 All sample containers were broken on this date <br /> 21 Laboratory report indicates hydrocarbon patterni is Present to the <br /> requested fuel quantitation range but does not resemble the pattern of the requested I, <br /> fuel The pattern more closely resembles that of a heavier hydrocarbon mix <br /> 22 All other VOCs by EPA Method 8021 were less then the reporting limit. <br /> 9 2033 xls/#386847 5 As of 08/16/01 <br /> f <br />