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Sequoia <br /> 680 Chesapeake Drive Redwood City,CA 9400- (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wigct Lane Walnut Creek,CA 94596 (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 /> s'11s <br />:1 Gettler Ryan/Geostrategles Client Prol ID Unocal 707 Pacific Ave Stockt Sampled 08/30/96 <br /> 6747 Sierra Court Suite G Sample Descript Eff Received 08/31/96 <br />' Dublin, CA 94568 Matrix AIR i <br /> Analysis Method 8015Mod/8020 Analyzed 09/03/96 <br /> ' <br /> Attention Deanna Harding Lab Number 9608J10-02 Reported 09f10f96 <br /> QC Batch Number GCO903963TEX17A <br /> Instrument lD 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 1.400 <br /> Benzene 1 0 N D <br /> Toluene 1 0 67 <br /> Ethyl Benzene -•• - - - - 1.0 37 <br /> Xylenes (Total) 1.0 270 <br /> Chromatogram Pattern C7-C-12 <br /> Weathered Gas - -- -- -- - - - <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 101 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - EIAP #1210 <br /> e Gregory <br /> Project Manager Page z <br />