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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(6SO)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Proj ID Unocal 6981, 7855 22 Sampled 12/08/97 <br /> 3164 Gold Camp Drive #240 Sample Descript MW-5 Received 12/09/97 <br /> Rancho Cordova, CA 95670 Matrix LIQUID <br /> Analysis Method EPA 8015 Mod Analyzed 12/12/97 <br /> Attention Steve Carter Lab Number 9712694-07 Reported 12/18197 <br /> QC Batch Number GC1209971SHSHSB <br /> Instrument ID GCV-01 <br /> Industrial Solvents <br /> Analyte Detection Limit Sample Results <br /> mg/L mg/L <br /> Methanol 1 0 N D <br /> Surrogates Control Limits% % Recovery <br /> Pentanol RTX 200 55 157 94 <br /> Pentanol DBWAX 57 170 105 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AtIALYTICAL - ELAP #1210 <br /> —4 <br /> MI ory <br /> Project Manager Page 14 <br />