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H ■ <br /> Sequoia 0 680 Chesapeake Dnve Redwood GM CA 94 (415) 364-9600 FAX(415) 364 9233 <br /> 1 404 N Wtgct Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 1195tnker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Proj ID Unocal 6981, 4707 Stockton Sampled 04/23/96 <br /> 3164 Gold Camp Drive #240 Sample Descript Eff Received 04/23/96 <br /> ' Rancho Cordova, CA 95670 Matrix AIR <br /> ,l Analysts Method 8015Mod/8020 Analyzed 04/25/96 <br /> Attention Greg Gurss Lab Number 96041`58-02 Reported 05/02j96 <br /> r ' <br /> QC Batch Number GC042596BTEXI7A <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 10 N D <br /> Benzene 0 10 N D <br /> Toluene 0 10 N D <br /> Ethyl Benzene 0 10 N D <br /> Xylenes (Total) 010 059 <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 101 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Agillk xe� <br /> 11111111111111111ke Gregory <br /> Project Manager Page 2 <br />