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•� Sequoia 680 Chesapeake Drive Redwood Cory CA 94063 (654)364-9600 FAX(650)364-9233 <br /> 404 N Wiger lane Walnut Creek CA 94598 (925)988-9600 FAX(9z5)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> *lop1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Prol ID Chevron 9-4275/980624-J1 Sampled 06/24/98 <br /> 1680 Rogers Avenue Sample Descript MW-8 Received 06/25/98 <br /> San Jose CA 95112 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 07/01/98 <br /> Attention Fran Thie Lab Number 9806G68-08 Reported 07JO9198 <br /> QC Batch Number MS070198MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> Di-Isopropyl Ether (DIPE) 20 N D <br /> Ethyl t-Butyl Ether (ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichlorcethane-d4 76 114 103 <br /> 10 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> r ect ry Manager Page 15 <br />