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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 /> 4 Analytical 8t9 StrskcrAvenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(9t6)921-0100 <br /> !Enviros- W Client Prof ID Shell 6131 Pacific, Stockton Sampled 09/16/97 <br /> 270 Perkins Ave Sample Descript MW-7-35' Received 09/19/97 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 09/29/97 <br /> INNAnalysis Method EPA 8260 Analyzed 09/30/97 <br /> —� _ .. _._ . _... R orted -1010P <br /> I"Attention J Gaarder _ Lab umber 9709C09=12 _"` _ _ _ _ <br /> ep 97 <br /> QC Batch Nurnber�MS092997MTBEEXA <br /> Instrument ID F2 <br /> ----Oxygenate-Compounds (EPA <br /> Analyte Detection Limit Sample Results <br /> ug/K9 u9/Kg <br /> Ethanol 50000 N D <br /> t-Butanol 5000 N D <br /> Metyl t-Butyl Ether (MTBE) 100 N D <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-D ichl o roethane-d4 70 121 102 <br /> i <br /> x <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN LYTICAL - ELAP #1210 <br /> Mik G gory Page 35 <br /> Project Manager <br />