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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 (510) 989 9600 FAX(510)989 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> qwrM <br /> Blaine Tech Services Client Prod ID Chevron 9-1848/971120-G3 Sampled 11/20/97 <br /> 1680 Rogers Avenue Sample Descript C-2 Received 11/26/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/04/97 <br /> Attention Fran Thie Lab Number 9711G04-02 Reported 12111197 <br /> QC Batch Number GC120497BTEX04A <br /> Instrument ID GCHP4 <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 640 <br /> Benzene 050 072 <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 115 <br /> r. <br /> AnalysestPenner <br /> N D were not present above the stated limit of detection <br /> SEQUALYTICAL - ELAP #1271 <br /> gy <br /> Project Manager Page 4 <br />