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` Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-96DO FAX(650)364-9Z33 <br /> 404 N Wiget lane Walnut Creek CA 94598 (9Z5)988-9600 FAX(92S)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> E455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-034Z <br /> �ttler-Ryan - Dublin Client Project ID Tosco 88#6981, Stockton Sampled Dec 31, 1998 <br /> 6747 Sierra Court, Suite J Sample Matrix Air Received Dec 31, 1998 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Jan 14, 1999 <br /> Attention Steve Carter First Sample # 812-2475 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> erg/L 812-2475 812-2476 <br /> Eff I of <br /> Purgeable <br /> Hydrocarbons 10 12 760 <br /> Benzene 0 050 N D 22 <br /> Toluene 0 050 N D 2 0 <br /> Ethyl Benzene 0 050 N D 0 51 <br /> Dotal Xylenes 0 050 N D 2 7 <br /> Chromatogram Pattern Gasoline& Gasoline <br /> Unidentified <br /> Hydrocarbons <br /> >G8 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 10 <br /> Date Analyzed 12/31/98 12/31/98 <br /> Instrument Identification HP-2 HP-2 <br /> Surrogate Recovery, % 100 158 * <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the slated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> * Surrogate recovery above control limit due to coelution <br /> Janne Fegley <br /> Project Manager <br /> 6122475 GET <1> <br />