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Sequoia 680 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 /> llco Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ;i Gettler Ryan/Geostrategtes Client Prof ID Chevron 9-1848, Manteca Sampled 08/25/97 <br /> 3164 Gold Camp Drive #240 Sample Descript B4 Received 08/30/97 <br /> '= Rancho Cordova, CA 95670 Matrix LIQUID <br /> !=2 Analysis Method 8015Mod/8020 Analyzed 09/19/97 <br /> ="Attention Greg Gurss ry Lab Number 9709993-12 Reported 10J27 97 <br /> QC Batch Number GC091997BTEX03A <br /> Instrument ID GCHP03 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 103 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> r ry <br /> Project Manager Page 12 <br />