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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> ,5�, 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[Geostrategtes _ - Client Prod ID Chevron 9-6171, Stockton Sampled 03/01/98 - <br /> 6747 Sierra Court Suite J Sample Descript MW-2 Received 03/02/98 <br /> a Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/10/98 <br /> Attention Deanna Harding Lab Number 9803027-04 Reported 03J12198 <br /> QC Batch Number G0031098BTEX03A _ <br /> Instrument ID GCHP3 <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 50 280 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 28 <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern C6-C8 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 341 Q <br /> f <br /> F <br /> 4nalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ALYTICAL - ELAP 41210 <br /> egory <br /> 3roject Manager Page 7 <br /> m <br />