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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)3649600 FAX(650)364 9233 <br /> 404 N Wget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)79Z-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232 9600 FAX(650)231-9612 <br /> Gettler- Ryan, Inc Client Project ID Tosco#6981, Stockton Sampled Jun 21, 1999 <br /> 3164 Gold Camp Dr, Ste#240 Sample Matrix Air Received Jun 22, 1999 <br /> Rancho Cordova, CA 95670 Analysis Method EPA 5030/8015 Mod /8020 Reported Jul 8, 1999 <br /> Attention Steve Carter First Sample# 906-1714 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> erg/L 906-1714 906-1715 <br /> I of Eff <br /> Purgeable <br /> Hydrocarbons 50 87 100 <br /> Benzene 050 23 027 <br /> Toluene 050 N D N D <br /> Ethyl Benzene 050 N D N D <br /> Total Xylenes 050 044 N D <br /> MTBE 2 5 270 <br /> Chromatogram Pattern Gasoline Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 50 50 <br /> Date Analyzed 6/23/99 6/23/99 <br /> Instrument Identification HP-2 HP-2 <br /> Surrogate Recovery, % 104 94 <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 <br /> 0 <br /> J <br /> Ju anne Fegley <br /> roject Manager <br /> 9461714 GGG <1> <br />