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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ' 404 N Wisct 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 /> i <br /> Gettler Ryan/Geostrategies Client Prol LID Unocal 4855 06, #6981 Sampled 12/20/96 <br /> 3164 Gold Camp Drive #240 Sample Descript Inf Received 12/2.1/96 <br /> Rancho Cordova, CA 95670 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 12/21/96 <br /> Attention Greg Gurss Lab Number 9612C85_-02 » Reported 12/30/96 =, <br /> » -µ s'� s » -- - _ _ <br /> QC Bsatch Number GC122096BTEX176 <br /> Instrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas .. ... 100 1600 <br /> Benzene 1 0 N D <br /> Toluene .. 1 0 29 <br /> Ethyl Benzene .. 1 0 _ 16 <br /> Xylenes (Total) ... .. 1.0 76 <br /> Chromatogram Pattern <br /> Unidentified HC C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 142 Q <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Mregory <br /> Pro ct Manager Page 2 <br />