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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 /> u 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)792-186S FAX(707)792-0342 <br /> Blame Tech Services Client Prol ID Chevron 9-4275/990310-Z1 Sampled 03/10%99 <br /> 1680 Rogers Avenue Sample Descript MW1 L Received 03/11/99 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/23/99 <br /> Attention Christine Lillie - Lab Number 9903653-01 r Reported 03f26199 <br /> QC Batch Number GC0323998TEX02A _ <br /> Instrument ID GCHP02 <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 50 550 <br /> Methyl t-Butyl Ether 25 77 <br /> Benzene 050 32 <br /> Toluene 050 1 1 <br /> Ethyl Benzene 050 11 <br /> _ Xylenes (Total) 050 _ 54 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 1370 <br /> '—Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Orel Shin <br /> ct Manager Pae 1 <br /> 9 <br />