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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925) 988-9600 <br /> Analytical FAX(925) 988 9673 <br /> loettler-Ryan - Dublin Client Project ID Tosca# 6981, Stockton Sampled Aug 22, 1999 <br /> 3164 Gold Camp Drive #240 Sample Matrix Air Received Aug 23, 1999 <br /> Rancho Cordova, CA 95670 Analysis Method EPA 5030/8015 Mod /8020 Reported Sep 7, 1999 <br /> Attention Mike Mitchener First Sample # W908440 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/MTBE <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> Ng/L W908440-01 908440-02 <br /> I of Eff <br /> Purgeable <br /> Hydrocarbons 10 2,400 26 <br /> Benzene 0 050 61 018 <br /> Toluene 0 050 19 N D <br /> Ethyl Benzene 0 050 N D N D <br /> *Total Xylenes 0 050 096 N D <br /> MTBE 0 250 360 N D <br /> Chromatogram Pattern Unidentified Gasoline <br /> Hydrocarbons <C6 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 <br /> Date Analyzed 8/24/99 8/24/99 <br /> Instrument Identification HP-2 HP-2 <br /> Surrogate Recovery, % 103 <br /> (QC Limits = 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 Please Note <br /> Surrogate recovery was above the EPA recommended limit due to coelution <br /> lianne Fegley <br /> Project Manager W908440 GET <1> <br />