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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 404 N Wrget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue Suite 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 /> i <br /> Blaine Tech Services Client Prol ID Chevron 9-4275/980326-G1 Sampled 03/26/98 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 03/27/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 04/02/98 <br /> Attention Fran Thle Lab Number 9803157-04 Reported 04112198 <br /> QC Batch Number MSO40198MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 4200 N D <br /> t-Butanol 830 N D <br /> Methyl t-Butyl Ether (MTBE) 17 1100 <br /> Di-Isopropyl Ether (DIPE) 17 <br /> ND <br /> Ethyl t-Butyl Ether (ETBE) 17 N D <br /> t-Amyl Methyl Ether (TAME) 17 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 76 114 88 <br /> 0 <br /> Analytes reported as N D were not present above the stated Irmit of detection <br /> SE 7711 <br /> ELAP #1210 <br /> y Pe <br /> sect Manager <br /> Page 10 <br />