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Groundwater Monitoring Data and Analytical Results <br /> Chevron Service Station#4-3232 <br /> 8660 Lower Sacramento Road <br /> Stockton,California <br /> EXPLANATIONS <br /> Groun6kater monitoring data and 4aboratory analytical results prior to Tune 22,2000,were compiled from reports prepared by Blaine Tech Services Inc <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline MTBE=Methyl tertiarp hut)I ether <br /> (ft)=Feet B=Benzene (ppb)=Parts per billion <br /> GWE=Groundwater Elevation T=Toluene --=Not Measured/Not Analvzed <br /> (mel) Mean sea level E=Ethylbenzene QA m Quality AssurancefTnp Blanf <br /> DTW=Depth to Water X=Xylenes NP No Purge <br /> * TOC elevations were resurveyed in April of 2002 by Morrow Surveying Elevations are based on San Joaquin County Benchmark No 1N-6 Brass disk <br /> in well at Thornton and Davis Roads(13enchmaik Elevation= 14 43 feet) <br /> TOC elevation changed due to well head maintenance � <br /> Z MTBE by EPA Method 8260 <br /> 1 t abointor) report indicates gasoline C6-C12 <br /> Laboratory report indicates unidentified hydrocarbons C6-C12 <br /> S TOC has been altered <br /> 6 Well development performed <br /> 7 BTEX and MTBE by EPA Method 8260 <br /> 6 TOC was incoriectly presented as 13 73 feet in previous report GWE has been updated <br /> I <br /> r <br /> 9 3232463 <br /> AS 06105 I <br />