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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(5 10) 988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 01W <br /> Blaine Tech Services Client Prol ID Shell Stockton/971202-L1 Sampled 12/02/97 <br /> 1680 Rogers Avenue Sample Descrlpt MW-11 Received 12/03/97 <br /> San.lose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/12/97 <br /> Attention Fran Thle Lab Number 9712360-13 Reported 12J1 91 97 <br /> bC Batcli Number GC121297BTEX21 A µ <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 N D <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 84 <br /> Analytes reported as N D were t present above the stated limit of detection <br /> SEQUOIA A L I AL - ELAP #1210 <br /> eggy Penner <br /> Project Manager Page 6 <br />