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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> ,!D 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> e nalytica 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Cambria - Client Prod 1D Shell Manteca Sampled 03/25/98 <br /> 1144 65th St Suite C Sample Descript MW-1, 15 5-16 5 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_9803J57-03 _ _ Reported 04JO9198 <br /> OC 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 . . . 220 <br /> Di-Isopropyl Ether (DIPE) 100 N D <br /> Ethyl t-Butyl Ether(ETRE) 100 N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 70 121 86 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> rd Herling <br /> Project Manager Page 7 <br />