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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker 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)79Z-034Z <br /> ATC Associates, Inc Client Prod ID Ripon Unified School Sampled 09/21/98 <br /> 1260 Graphics Drive Sample Descript RUSD-SB8-W Received 09/22/98 <br /> Modesto, CA 95351-1502 Matrix LIQUID <br /> 4 Analysis Method EPA 8260 Analyzed 09/30/98 <br /> i Attention Drew Van Allen Lab Number _9809E49-02 Reported 10f06f98 <br /> C Batch Number MS092998MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 5000 N D <br /> t-Butanol 1000 N D <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> DI-Isopropyl Ether (DIPS) 20 N D <br />'Ethyl t-Butyl Ether (ETRE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br />'Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 98 <br /> 1 <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP #1210 <br /> 1r1oj:ct Manager Page 5 <br /> 1 <br />