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4D- , Sequoia 680 Chesapeake Dave 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 /> SIO Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Gettfer Ryan/Geostrategies Client Prol ID Chevron 9-6171, Stockton Sampled 02/24/97 <br /> 6747 Sierra Court Suite G Sample Descript TB-LB Received 02/25/97 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/28/97 <br /> Attention Deanna Harding _ Lab Number 9702D34-01 _ _ Reported 03105/97 - <br />]C Batch Number GCO22897BTEX06A _ - - --�- ---- - --- ---- - -- -- <br /> istrument ID GCHP6 <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 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 84 <br /> laiytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP 01210 <br /> gory <br /> of onager Page 7 <br />