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r <br /> r <br /> Table 1 <br /> Groundwater Monitoring Data and Analytical Results <br /> Former Chevron Service Station#9-8632 <br /> 575 Grant Line Road ` <br /> Tracy,California <br /> EXPLANATIONS <br /> Groundwater monitoring data and laboratory analytical results prior to June 26,2000,were compiled from reports prepared by Blaine Tech Services, Inc ` <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline - = TOG=Total Oil'and Grease <br /> (tt)=Fee[ B=Benzene _ (ppb)=Parts per billion <br /> GWE=Groundwater Elevation T=Toluene ` NP=No Purge <br /> (msi)=Mean sea level E=Ethylbenzene - _ _ - =Not Measured/Not Analyzed - <br /> DTW=Depth to Water i X Xylenes <br /> QA=Quality Assurance/Trip Blank <br /> TPH-D=Total Petroleum Hydrocarbons as Diesel - MTBE L Methyl tertiary butyl ether - <br /> i <br /> * TOC elevations were re-surveyed on March 19 2002 by Morrow Surveying Previous survey was completed on November 16 2000,by Virgil Chavez Land <br /> r , <br /> Surveying The elevations are based on the data provided by G-R Inc,holding TOC of M W-1 Measurements taken at approximate north side of top of box top,of <br /> t <br /> casings were marked at location of measurements - - <br /> i Chromatogram pattern indicates an unidentified hydrocarbon <br /> EPA Method 5520 ' <br /> Laboratory report indicates gasoline C6-C12 - <br /> 4 Laboratory report indicates unidt ntitied hydrocarbons C 10-C24 - t <br /> 5 Laboratory report indicates unidentified hydrocarbons C9-C24 - <br /> 6 Laboratory report indicates unidentified hydrocarbons<C16 - <br /> ' 3 <br /> 7 MTBE by EPA Method 8260 <br /> Laboratory report indicates discrete peaks <br /> 9 Laboratory report indicates unidentified hydrocarbons>C16 - <br /> '° Laboratory report indicates hydrocarbon pattern present in the requested fuel quantitation range but does not resemble the pattern of the requested fuel <br /> ' Laboratory report indicates gasoline <br /> 12 Laboratory report indicates Toluene did not confirm via GCMS _ p <br /> " Laboratory report indicates this sample was originally analyzed within holding time Re-analysis for confirmati6n or dilution was performed past the <br /> recommended holding time <br /> E _ <br /> 14 MTBE by EPA Method 8260 was analyzed outside recommended holding time <br /> j5 Due to laboratory error the TPN-D samples for MW-3 and MW-4 were composited The corresponding result is reported as MW-3 _ <br /> 16 Analysis with silica gel cleanup <br /> 9 8632%0855 . _ I AS 09/05 <br /> 1 ; <br /> S C v I <br />