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Groundwater Monitoring Rand Analytical Results • <br /> Chevron SerVLce ion#9-2033 <br /> 508 West Charter Way <br /> Stockton,California <br /> EXPLANATIONS - <br /> Gi oundwater monitoring data and laboratory analytical results prior to May 31,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> C=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline --=Not MeasurM Not Analyzed <br /> TOC <br /> B=Benzene TBA=Tertiary butyl alcohol <br /> T=Toluene DIPS=Di-isopropyl ether <br /> GWE=Groundwater Etevation <br />' (msl)=Mean sea level E=EEhylbenzene TAME=Tertiary amyl methyl ether <br /> X=Xylenes <br /> ETRE=Ethyl tertiarybutyl ether <br /> DTW=Depth to Water <br /> MTBE=Meth 1 tertiarybutyl ether QA=Quality Assurance/Trip Blank <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel y <br /> TPH-MO-Total Petroleum Hydrocarbons as Motor Oil (pph)=Parts per billion <br /> ^ TQC elevation altered due to wellhead maintenance on May 21, 1998 <br /> ' Chromatogram pattern indicates an unidentified hydrocarbon <br /> 2 MTBE by EPA Method 8260 <br /> Due to laboratory error TPH-D was not analyzed <br /> 4 Odor <br /> S Laboratory report indicates unidentified hydrocarbons>C16 <br /> G Laboratory report indicates gasoline C6-C12 <br /> 7 Laboratoi y report indicates gasoline C6-C 12+unidentified hydrocarbons<C6 <br /> 8 All sample containers were broken on this date <br /> Q Laboratory report indicates hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of the requested <br /> fuel The pattern more closely resembles that of a heavier hydrocarbon mix <br /> 10 BTEX and MTBE by EPA Method 8260 <br /> 11 Laboratory report indicates the observed sample pattern is not typical of#2 fuel/diesel 1t elutes In the DRO range later than#2 fuel <br /> 12 Laboratory report indicates the observed sample pattern includes 92 fuel/diesel and an additional pattern which elutes later in the DRQ range <br /> 3 Laboratory report indicates the observed sample pattern includes#2 fuel/diesel and an additional pattern which elutes earlier and later In the DRO range <br /> 14 Analyzed with silica gel clean-up <br /> 9-2033 xis/#386847 7 As of 08/08/05 <br />