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.I 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 /> 4D— Analytical 819 5tnker Avenue Swte 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792 1865 FAX(707)792 0342 <br /> Blaine Tech Services Client Prol ID Chevron 9-8264/980810-T1 Sampled 08/10/98 <br /> 1680 Rogers Avenue Sample Descrlpt MW-4 Received 08/13/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 08/24/98 <br /> Attention Fran Thie Lab Number 9808910-04 Reported 08j31 j98 <br /> QC Batch Number MS082298MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 4150 N D <br /> t-Butanol 830 N D <br /> Methyl t-Butyl Ether (MTBE) 17 1100 <br /> Di-Isopropyl Ether (DIPE) 17 N D <br /> Ethyl t-Butyl Ether (ETBE) 17 N D <br /> t-Amyl Methyl Ether (TAME) 17 150 <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 95 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> i ory <br /> P <br /> an <br /> ager Page 14 <br />