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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 (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 <br /> Analysis Method 8015Mod/8020 Analyzed 06/15/98 <br /> Attention Fran Thie Lab Number 9806741-02 Reported 06f24j98 <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 5000 54000 <br /> Methyl t-Butyl Ether 50 1600 <br /> Benzene 50 3100 <br /> Toluene 50 N D <br /> Ethyl Benzene 50 2900 <br /> Xylenes (Total) 50 480 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 73 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41849 <br /> gory <br /> sect Manager Page 5 <br />