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t <br /> Table 1 <br /> Groundwater Monitoring Data and Analytical Results I <br /> Chevron Service Station#9-8264 <br /> E 3775 Tracy Boulevard <br /> Tracy,California q <br /> EXPLANATIONS: <br /> Groundwater monitoring data and laboratory analytical results prior to May�18,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> 1 <br /> TOC=,Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline SVOCs=Semivolatile Organic Compounds <br /> {ft)= <br /> Feet, ! B=Benzene VOCs=Volatile Organic Compounds <br /> GWE Groundwater Elevation T=Toluene (ppb)-Parts per billion <br /> (msl)=Mean sea level E=Ethylbenzene -- Not Measured/Not Analyzed <br /> DTW Depth to Water it X=�Xylenes QA=Quality Assurance <br /> SPHT=Separate Phase Hydrocarbon Thickness ! MTBE=Methyl tertiary butyl ether <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel ;I TOG=Total Oil and Grease •k <br /> i Chromatogram pattern indicated an unidentified hydrocarbon <br /> Insufficient preservative to reduce the sample pH to less than 2 Sample was analyzed within 14 days of sampling,but beyond the 7 days recommended <br /> for benzene,Toluene and Ethylbenzene - <br /> i TOC elevation altered due to casing repairs <br /> 4 Laboratory report indicates gasoline C6-C 12 <br /> s Laboratory report indicates unidentified hydrocarbons<C16 �m <br /> 6 Diesel data for MW 1 is not available because there was not enough sample for extraction f <br /> sLaboratory report indicates unidentified hydrocarbons C9-C24 1 <br /> MTBE by EPA Method 8260 <br /> 9 Laboratory report indicates second highest MTBE concentration wlas coli firmed by 8260 Initial BTEX analysis indicated that this well appeared to <br /> have the highest MTBE concentration u <br /> io Laboratory report indicates discrete peaks i f - <br /> i n BTEX and MTBE b EPA Method 8260 <br /> ix � y <br /> Laboratory report indicates the observed sample pattern is not typical of diesel/#2 fuel oil <br /> I E <br /> I # <br /> - <br /> I � s <br /> E F <br />` 9-826 #386854 # <br /> � 10/28/42 <br /> _ <br />