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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 (510) 988 9600 FAX (510) 988 %73 <br /> Analytical 815 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916) 911 0100 <br /> ' Blaine Tech Services Client Prol ID Shell Stockton/971009-G1 Sampled 10/09/97 <br /> 1680 Rogers Avenue Sample Descript RW-2 Received 10/10/97 <br /> ,= San .lose, CA 95112 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 10/18/97 <br /> =-Attention=Fran Thie _ _ - _ Lab Number-97-10591=02 Reported _10J23197 <br /> QC Batch Number MS1 01 797MTBEF2A - <br /> Instrument ID F2 <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 /> Metyl t-Butyl Ether (MTBE) 20 56 <br /> Di-Isopropyl Ether (DIPS) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dtchloroethane-d4 76 114 91 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQU A AL ICAL - ELAP #1210 <br /> Peggy enn • <br /> Project Manager Page 4 <br />