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® Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> `� 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytics B 19 Striker Avenue Suite 8 Sacramento,C4 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Cambria Client Prof-ID Shell Manteca Sampled 03/25/98 <br /> 1144 65th St Suite C Sample Descript MW-1, 26-27 Received 03/26/98 <br /> Oakland, CA 94608 Matrix SOLID Extracted 04/01/98 <br /> Analysis Method EPA 8260 Analyzed 04/01/98 <br /> Attention Paul Waite Lab Number 9803J57-07 Reported 04JO9198 <br /> QC Batch Number MSO40198MTBEEXA - <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/kg ug/kg <br /> Ethanol 25000 N D <br /> t-Butanol 5000 N D <br /> Methyl t-Butyl Ether (MTBE) 100 N D <br /> Di-Isopropyl Ether(DIPE) 100 N D <br /> Ethyl t-Butyl Ether(ETBE) 100 N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 70 121 75 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> R d Herling <br /> Project Manager Page 13 <br />