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1 Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wlget 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-Oi00 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> 'Pet-tier-Ryan - Dublin Client Project Ib Tosco #11193, Stockton Sampled bec 22, 1998 <br /> 6747 Sierra Court, Suite J Sample Matrix Sol] Received Dec 22, 1998 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Dec 23, 1998 <br /> Attention Doug Lee First Sample # 812-1862 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample Sample <br /> Analyte Limit ID ID ID <br /> mg/Kg 812-1862 812-1863 812-1864 <br /> P3 P4 P5 <br /> Purgeable <br /> Hydrocarbons 10 20 93 N D <br /> Benzene 00050 N D 012 0 0088* <br /> Toluene 00050 N D 027 N D <br /> Ethyl Benzene 00050 021 020 N D <br /> Dotal Xylenes 00050 1 1 0 80 N D <br /> MTBE 0 050 N D 053 0 56* <br /> Chromatogram Pattern Gasoline Gasoline -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 20 50 10 <br /> Date Analyzed 12/23/98 12/23/98 12/23/98 <br /> Instrument Identification HP-5 HP-5 HP-5 <br /> Surrogate Recovery, % 87 125 87 <br /> (QC Limits = 40-140%) <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 /> QUOIA ANALYTICAL, #1271 Please Note <br /> * Result preliminary and subject to revision,to completion of confimation analysts <br /> Ilianne Fegley <br /> Project Manager <br /> 8121856 GET <2> <br /> ,per a <br />