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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9133 <br /> 404 N Wiget[ane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> frilly <br /> Analytical 819 5tnker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707)792-0341 <br /> ATC Associates, Inc Client Pro) ID Ripon Unified School <br /> 1260 Graphics Drive Sample Descript Method Blank Sampled <br /> Modesto, CA 95351-1502 Matrix LIQUID Received 09/22/98 <br /> Attention Drew Van Allen <br /> Analysis Method EPA 8260 Analyzed 09/29/98 C Batch Number MS092998MTBEH6A Lab Number 9809E49-05 <br /> Reported 10J06J98 <br /> Instrument 10 H6 <br /> 'Analyte Oxygenate Compounds (EPA 8260) <br /> Detection Limit Sample Results <br /> rug/L ug/L <br /> Ethanol <br /> t-Butanol 500 N D <br /> Methyl t-Butyl Ether (MTBE) 100 N D <br /> Di-Isopropyl Ether (DIPE) 20 N D <br /> 1 Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether(TAME) 20 N D <br /> 20 ND <br /> Surrogates Control Limits% <br /> ' 1,2-Dichloroethane-d4 76 114 % Recovery <br /> 99 <br /> 1 <br /> alytes reported as N!D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP #1210 <br /> l <br /> j'rojec anager <br /> Page 72 <br /> I <br />