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Sequoia 404 N Vtl a <br /> Walnut Creek CAA Lane <br /> (925)988 9600 <br /> Analytical FAX(925)988-9673 <br /> 40ettler-Ryan -Dublin Client Project ID Tosco #6981, Stockton Sampled Jul 27, 1999 <br /> 6747 Sierra Court, Suite J Sample Matrix Air Received Jul 27, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Aug 11, 1999 <br /> Attention Steve Carter First Sample# 907-1694 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> Mg/L 907-1694 907-1695 <br /> 1 of Eff <br /> Purgeable <br /> Hydrocarbons 10 92 25 <br /> Benzene 0 050 6 4 0 21 <br /> Toluene 0 050 N D N D <br /> Ethyl Benzene 0 050 N D N D <br /> •Total Xylenes 0 050 N D N D <br /> MTBE 025 260 <br /> Chromatogram Pattern Gasoline& Gasoline <br /> Unidentified <br /> Hydrocarbons <br /> <C6 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 5 0 1 0 <br /> Date Analyzed 7/30/99 7/30/99 <br /> Instrument Identification HP-2 HP-2 <br /> Surrogate Recovery, % 190 95 <br /> (QC Limits w 70-130%) <br /> Purgeable Hydrocarbons are quantitated against afresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 <br /> AkU4�� <br /> Ju ianne Fegley <br /> Project Manager <br /> ,Q , 9071694 GET <t> <br />