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. . , Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(4t5) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> WIF Analytical 819 Striker Avenge Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Gettler Rya%Geostrategies Client Prol ID Chevron 9-6171, Stockton -� - Sampled 07/20/97 <br />, 6747 Sierra Court Suite G Sample Descript TB-LB Received 07/22/97 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 07/24/97 <br />, Attention Deanna Harding Lab Number 9707637-01 - Reported 07J31197 <br /> QC Batch Number GC072497BTEX03A <br /> Instrument ID GCHP03 <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 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Tri luorotoluene 70 130 92 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> rregoryPr Page <br />