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K \ Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 968 9600 FAX(5t0)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/970206-1-12 Sampled 02/06/97 <br /> 1680 Rogers Avenue Sample Descrlpt DUP Received 02/10/97 <br /> San ,dose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/14/97 <br /> Attention Fran Thie Lab Number 9702578-04 Reported 02J25197 <br /> QC Batch Number GCO21497BTEX21 A <br /> Instrument ID GCHP21 <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 50 N D <br /> Methyl t-Butyl Ether 25 33 <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 078 <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 101 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQ IA ANALYTICAL - ELAP #1210 <br /> y Penner <br /> Project Manager Page 4 <br />