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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 (9z5)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Prol ID Shell 141 N EI Dorado Sampled 10/05/98 <br /> 1680 Rogers Avenue Sample Descript RW-2 Received 10/08/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method-8015Mod%8020 Analyzed-10%13%98—" <br /> Attention Fran Thie Lab Number 9810725-02 Reported 10121/98 <br /> QC Batch Number GC101398BTEX03A <br /> Instrument ID GCHP03 <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 36 <br /> Benzene 050 N D <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 96 <br /> Analytes reported as N D re not present above the stated limit of detection <br /> SEQUOI L CAL - ELAP #1210 <br /> Peggy Penner <br /> Project Manager Page 2 <br />