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Sequoia 680 Chesapeake Drive Redwood City CA 9406- (650) 364 9600 FAX(650)364-9233 <br /> 404N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5 10)988 9673 <br /> faller Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geost rategies Client Pro) ID Unocal SS#0187, 280045 85 Sampled 03/09/98 <br /> 6747 Sierra Court Suite J Sample Descnpt U-4 Received 03/09/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 03/12/98 <br /> Attention Deanna Harding Lab Number 9803523-05 Reported 03f 18198 <br /> QC Batch Number MS031198MTBEH6B <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 - 28 <br /> Di-Isopropyl Ether (DIPE) 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 S9 <br /> 0 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOe[AANTICAL - ELAP #1210 <br /> rolect Manager Page 1 <br />