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t. <br /> 4� <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-010 0 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707) 792-0342 <br /> 4pettler-Ryan, Inc Client Project Ib Tosco #4707, Stockton Sampled Jan 4, 1999 <br /> 3164 Gold Camp Dr, Ste #240 Sample Matrix Air Received Jan 5, 9999 <br /> Rancho Cordova, CA 95670 Analysis Method EPA 5030/8015 Mod /8020 Reported Jan 15, 1999 <br /> Attention Steve Carter First Sample# 901-0120 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> erg/L 901-0120 901-0121 <br /> Eff I of <br /> Purgeable <br /> Hydrocarbons 10 26 91 <br /> Benzene 0 050 0 057 1 4 <br /> Toluene 0 050 0 061 N D <br /> Ethyl Benzene 0 050 N D N D <br /> lootal Xylenes 0 050 015 0 82 <br /> Chromatogram Pattern Gasoline& Gasoline <br /> Unidentified <br /> Hydrocarbons <br /> C6-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 5 0 <br /> Date Analyzed 1/7/99 1/7/99 <br /> Instrument Identification HP-2 HP-2 <br /> Surrogate Recovery, % 95 103 <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 stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 <br /> ianne Fegley <br /> Project Manager <br /> 9010120 GGG <1> <br />