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♦ f <br /> Sequoia680 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) 988-9673 <br /> �III� Analytical 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Gettler Ryan/deostrategies Client Prol ID Chevron 9-6171, Stockton Sampled 03/01/98 <br /> ' 6747 Sierra Court Suite J Sample Descript MW-7 Received 03/02/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/10/98 <br /> Attention Deanna Harding Lab Number 9803027-07 Reported 03JI2198 <br /> CC Batch Number GC031098BTEX03A <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 50 330 <br /> Methyl t-Butyl Ether 25 35 <br /> Benzene 0 50 40 <br /> Toluene 050 46 <br /> Ethyl Benzene 050 74 <br /> Xylenes (Total) 34 <br /> Chromatogram 050 Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 102 <br /> 10 <br /> knalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA NALYTICAL - EL4P #1210 <br /> Gregory <br /> ct Manager Page 13 <br />