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r <br /> i• �:�' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(656)364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (925)988 9600 FAX(9I5)988-9673 <br /> I Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)792 0342 <br /> 4pettler-Ryan, Inc Client Project ID Tosco #6981, Stockton Sampled Mar 1, 1999 <br /> 3164 Gold Camp Dr, Ste#240 Sample Matrix Air Received Mar 2, 1999 <br /> Rancho Cordova, CA 95670 Analysis Method EPA 5030/8015 Mod /8020 Reported Mar 12, 1999 <br /> Attention Steve Carter First Sample # 903-0228 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> erg/L 903-0228 903-0229 <br /> I of Eff <br /> Purgeable <br /> Hydrocarbons 10 110 53 <br /> Benzene 0 050 0 81 0 054 <br /> Toluene 0 050 N D N D <br /> Ethyl Benzene 0 050 N D N D <br /> Total Xylenes 0 050 1 4 022 <br /> Chromatogram Pattern Gasoline Gasoline & <br /> Unidentified <br /> Hydrocarbons <br /> >C7 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 <br /> Date Analyzed 3/3/99 3/3/99 <br /> Instrument Identification HP-2 HP-2 <br /> Surrogate Recovery, % 97 102 <br /> (OC Limits = 70-130%) <br /> Purgeabie 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 /> � l <br /> lianne Fegley (f <br /> Project Manager <br /> 9030228 GGG <1> <br />