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4 Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget[ane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (9t6)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Cambria Client Prol ID Shell 2494 Fremont Sampled 04/30/98- <br /> 270 Perkins Ave Sample Descnpt S-1-65' Received 05/01/98 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 05/04/98 <br /> Analysis Method EPA 8260 Analyzed 05/08/98 <br /> Attention Mike Murphy Lab Number 9805086-03 Reported 05j18198 <br /> QC Batch Number MS050498MTBEEXA <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/kg ug/kg <br /> Ethanol 500000 N D <br /> t-Butanol 100000 N D <br /> Methyl t-Butyl Ether (MTBE) 2000 N D <br /> Di-Isopropyl Ether (DIPE) 2000 N D <br /> Ethyl t-Butyl Ether (ETRE) 2000 N D <br /> t-Amyl Methyl Ether (TAME) 2000 N D <br /> Surrogates Control Limits% % Recovery <br /> 1,2-Dichloroethane-d4 70 121 84 <br /> Analytes reported as IN <br /> re not present above the stated limit of detection <br /> SEQUO ICAL - ELAP #1210 - <br /> Peggy r <br /> Project Manager Page 8 <br />