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Groundwater Monitor ngsa and Analytical Results <br /> Chevron Service Station#9-1452 <br /> 334 East Main Street <br /> Ripon,California <br /> EXPLANA'T'IONS <br /> Groundwater monitoring data and laboratory analytical results prior to November 29,2001,were compiled from reports prepared by Blaine Tech Services,Inc <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline (ppb)=Parts per billion <br /> (ft)=Feet B=Benzene --=Not Measured/Not Analyzed <br /> DTW=Depth to Water T=Toluene ND—Not Detected <br /> (ms])=Mean Sea Level E=Ethylbenzene QA=Quality Assurance/Trip Blank <br /> GWE—Groundwater Elevation X—Xylenes <br /> TPH-D—Total Petroleum Hydrocarbons as Diesel MTBE—Methyl tertiary butyl ether <br /> * TOC elevations are reference to ms] TOC elevations were resurveyed by Morrow Surveying on April 14,2003 Elevations are based on USGS benchmark H-1413, <br /> (Benchmark Elevation=7171 feet,NAVD 88) <br /> i BTEX and MTBE by EPA Method 8260 <br /> 2 Well development performed <br /> 9-1452 xis/#386582 6 As of 11/11/03 <br />