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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 (92S)988-9600 FAX(925)988-9673 <br /> 8i9 5tnker Avenue Su to 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 Prol ID Ripon Unified School Sampled 09/21/98 <br /> 1260 Graphics Drive Sample Descript RVSD-SB11-20 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 9809E04-07 Reported 09130198 <br /> C Batch Number MS092598MTBEEXA <br /> Instrument ID F2 <br /> I <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 70 121 104 <br /> li <br /> 1 <br /> Lal <br /> ytes reported as N D were not present above the stated limit of detection <br /> DUOIA ANALYTICAL - ELAP #1210 <br /> Vrojec;a�nager Page 14 <br /> 1 <br />