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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 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 Pro) 10 Chevron 9-6171, Stockton Sampled 05/12/96 <br /> 6747 Sierra Court Suite G Sample Descript MW-7 Received 05/15/96 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/20/96 <br /> Attention Deanna Harding Lab Number 9605A58-02 Reported 05/23196 <br /> QC Batch Number GC052096BTEX21A - <br /> Instrument ID GCHP21 <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 <br /> Methyl t-Butyl Ether 25 N DN D <br /> Benzene <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern 0 50 N D <br /> Surrogates Control Limits % % Recov <br /> Trifluorotol uene Recovery <br /> 70 130 er <br /> 14 <br /> nalytes reported as N D were not present above the stated limit of detection <br /> rEQUOIA ANALYTICAL - ELAP 01210 <br /> Irregory <br /> ct Manager <br /> Page 2 <br />