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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)3649233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(9 16)921-0 100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070 41 11 (650)232-9600 FAX(650)232-9612 <br /> 4i <br /> Gettler-Ryan - Dublin Client Project 10 Tosco #6981, Stockton Sampled Apr 23, 1999 <br /> 6747 Sierra Court, Suite J Sample Matrix Air Received Apr 23, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported May 13, 1999 <br /> Attention Steve Carter First Sample # 904-2081 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D <br /> pg/L 904-2081 904-2082 904-2083 904-2084 <br /> Eff Inf VIN-3 VW-6 <br /> Purgeable <br /> Hydrocarbons 10 40 140 59 110 <br /> Benzene 0 050 0 068 025 N D 035 <br /> Toluene 0 050 N D N D N D N D <br /> Ethyl Benzene 0 050 N D N D N D N D <br /> Total Xylenes 0 050 013 099 N D N D <br /> Chromatogram Pattern Gasoline Gasoline Gasoline Gasoline& <br /> Unidentified <br /> Hydrocarbons <br /> >C11 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 50 <br /> Date Analyzed 4/26/99 4/26/99 4/26/99 4/26/99 <br /> Instrument Identification HP-2 HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 93 85 95 93 <br /> (OC 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 /> EQUOIA ANALYTICAL, #1271 <br /> Anne Fegley y <br /> Project Manager <br /> 9042081 GET ¢1> <br />