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' Sequoia680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Prol ID Chevron 9-8632/980212-C1 Sampled 02/12/98 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 02/13/98 <br /> San Jose, CA 95112 Matrix LIQUID Extracted 02/18/98 <br /> Analysis Method EPA 8015 Mod Analyzed 02/21/98 <br /> Attention Fran Thie Lab Number 9802902-04 Reported 03J02J98 <br /> QC Batch Number GCO218980HBPEXZ - <br /> Instrument ID GCHP19B <br /> Total Extractable Petroleum Hydrocarbons (TEPH) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TEPH as Diesel 50 150 <br /> Chromatogram Pattern C9-C24 Unidentified HC <br /> Surrogates Control Limits % % Recovery <br /> n-Pentacosane (C25) 50 150 93 <br /> Results quantitated against a diesel. standard <br /> Anaiytes reported as N D were not present above the stated limit of detection <br /> VIALYTICAL - ELAP #1210 <br /> Pe 4 WP<lnner <br /> ct Manager Page 8 <br />