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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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916 )921-0100 <br /> Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 707 792-t 865 FAX 707 792-0342 <br /> 1551 Industrial Road San Carlos, CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Blaine Tech Services Client Prol-ID Chevron 9-2033/990217-P1 Sampled 02/17/99 <br /> 1680 Rogers Avenue Sample Descrlpt MW-1 Received 02/17/99 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/24/99 <br /> Attention Christine Lillie Lab Number 9902842-01 r Reported 03105199 <br /> QC Batch Number GCO22499BTEX30A <br /> Instrument ID GCHP30 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 87 <br /> Methyl t-Butyl Ether 25 80 <br /> Benzene 050 N D <br /> Toluene 0 50 077 <br /> Ethyl Benzene 0 50 060 <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 121 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> t cum� vii <br /> l Mel Shin <br /> lect Manager Page 2 <br />