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680 Chesapeake Dave Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 4804 N Wiget Lane Walnut Creek CA 94598 (925)9aB-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Prod ID Shell 2575 Country Club Blvd Sampled 10/06/98 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 10/08/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> - Analysis Method =EPA-8260 Analyzed=10/14/98= <br /> Attention Fran Thie Lab Number 9810737-03 Reported 10127198 <br /> QC Batch Number MS1 01 498MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 835 N D <br /> t-Butanol 167 N D <br /> Methyl t-Butyl Ether (MTBE) 33 240 <br /> DI-Isopropyl EtherDIPE) 33 N D <br /> Butyl <br /> Ethyl t- Ether 6BE) 33 N D <br /> t-Amyl Methyl Ether (TAME) 33 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 102 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA A L CAL - ELAP #1210 <br /> Peggy Pener <br /> Project Man W <br /> r Page 7 <br />