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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 rAX(650)364 9233 <br /> Ci) <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> CIIi) Analytical 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> _ <br />= Gettler Ryan/Geostrategles Client Prol ID Unocal 7827 21, #0187 Sampled 08/25/97 <br />! 6747 Sierra Court Suite G Sample Descript U-9 Received 08/26/97 <br />' Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 08/29/97 " <br /> Y <br />'= Reported 09j03f97 <br /> Attention Steve Carter Lab Number 970SE35-02 <br /> QC Batch Number GC082997BTEX17A <br /> Instrument lD GCHP17 <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 12 990 <br /> Methyl t-Butyl Ether N D <br /> 2 <br /> Benzene 2 5 13D <br /> Toluene 2 5 N D <br /> Ethyl Benzene 2 5 30 <br /> 2 5 N D <br /> Xylenes (Total) <br /> Chromatogram Pattern C6-C12 <br /> Unidentified HC - <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 102 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - FLAP #1210 <br /> AiProject Manager Page 2 <br />