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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 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> fr07 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 <br /> 1260 Graphics Drive Sample Descript Method Blank A Received 09/22/98 <br /> Modesto, CA 95351-1502 Matrix LIQUID 98 09 30 zed <br /> Analysis Method EPA 8260 Analyzed / / <br /> Attention Drew Van Allen Lab Number 9809E49-06 Reported 10J06J98 <br /> C Batch Number MS092998MTBEH6A <br /> nstrument ID Hfi <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> 'Ethanol 500 N D <br /> 100 N D <br /> t-Butanol <br /> Methyl t-Butyl Ether(MTBE) 20 N D <br /> Di-Isopropyl Ether(DIPE) 20 <br /> 'Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Sun•ogates Control Limits % % Recovenj <br /> '1,2-Dichloroethane-d4 76 114 96 <br /> alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP 41210 <br /> rolect M ager Page 15 <br /> I <br />