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680 Chesapeake Drive Redwood City CA 94063 (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 Straker Avenue Suite 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)792-0342 <br /> ATC Associates, Inc Client Pro) ID Ripon Unified School Sampled 09/21/98 <br /> 1260 Graphics Drive Sample Descript RVSD-SB10-20 0 Received 09/22/98 <br /> Modesto, CA 95351-1502 Matrix SOLID Extracted 09/25/98 <br /> Analysis Method EPA 8260 Analyzed 09/26/98 <br />[Attention Drew Van Allen Lab Number 9809E04-05 Reported 09j30[98 <br /> C Batch Number MS092598MTBEEXA - - <br /> Instrument ID F2 <br /> 1 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 /> ,2-Dichloroethane-d4 70 121 101 <br /> i <br /> 1 <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> alytes reported as N D were not present above the stated lima of detection <br /> I'EQUOIA ANALYTICAL - ELAP121 <br /> # o <br />' r <br /> rolect Manage Page 10 <br />