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` 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia <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 9-8632/980610-1-1 Sampled 06/10/98 <br /> 1680 Rogers Avenue Sample Descript MW-2 Received 06/11/98 <br /> San Jose, CA 95112 Matrix LIQUID Extracted 06/18/98 <br /> Analysis Method EPA 8015 Mod Analyzed 06/20/98 <br /> Attention Fran Thie Lab Number 9806741-02 Reported 06J24J98 <br /> QC Batch Number GC0618980HBPEXA <br /> Instrument ID GCHP4B <br /> Total Extractable Petroleum Hydrocarbons (TEPH) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TEPH as Diesel 50 140 <br /> Chromatogram Pattern C9-C24 Unit! -HC <br /> Surrogates Control Limits% % Recovery <br /> n-Pentacosane (C25) 50 150 93 <br /> i <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> regory <br /> oject Manager Page 4 <br />