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Sequoia 680 Chesapeake Dnve 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 Shell Stockton/971009-G1 Sampled 10/09/97 <br /> 1680 Rogers Avenue Sample Descrlpt DUP Received 10/10/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/21/97 <br /> Attention Fran Thie Lab Number 9710593-13 Reported 10f23197 <br />)C Batch Number GC102197BTEX02A <br /> nstrument ID GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) witt^ BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether - --- 25 - 50 <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 95 <br /> knalytes reported as N D were not present above the stated limit of detection <br /> 5E(' AL iCAL - El #1210 <br />' Penner <br />'rol ct Manager Page 12 <br />