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Sequoia 680 Chesapeake Drive Redwood CjM CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue,Suite a Sacramento,CA 95834 (916) 921-9600 FAX(916) 92.1 0100 <br /> Gettler RyanlGeostrategies - - _ Client Proj ID Chevron 9-6171, Stoc-kt-on -Sampled 03/01/98 <br /> 6747 Sierra Court Suite J Sample Descript MW-3 Received 03/02/98 - <br /> Dublin, CA 94568 Matrix LIQUID - <br /> Analysis Method 8015Mod/8020 Analyzed 03/09/98 <br /> Attention Deanna Harding Lab Number 9803027-02 Reported 03j12j98 <br /> DC Batch Number GC030998BTEX17A <br /> nstrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L. <br /> TPPH as Gas 50 150 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Reidentified HC C6-C8 <br /> Surrogates Control Limits % % Recovery <br /> Trifiluorotoluene 70 130 96 <br /> oalytes reported as N D were not present above the stated limit of detection <br />;EQUOIA ANALYTICAL - ELAP 41210 <br /> 1 16ory <br />'rolect Manager Page 3 <br /> eo <br />