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6bV Chesapeake Drive Redwood Ciry CA 94u63 (650)364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 5tnker Avenue Swte 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0362 <br /> Cambria -Client Prol ID Shell 42o-W Kettleman Lane Sampled 10/29/98 <br /> 1144 65th St Suite C Sample Descript SB-B(8 0') Received 10/30/98 <br /> Oakland, CA 94608 Matrix SOLID Extracted 11/05/98 <br /> Analysis Method EPA 8260 Analyzed 11/06/98 <br /> Attention Aubrey Caal Lab Number 9811146-03 Reported 11117198 <br /> QC Batch Number MS110498MTBEEXA - <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-Dlchloroethane-d4 70 121 85 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA N LYTICAL - ELAP #1210 <br /> 0 <br /> Peg y Pe ner <br /> Prol anager Page 7 <br /> — - - - - —cam -- -- - <br />