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4 <br /> Sequoia680 Chesapeake Dnvc 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 /> Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (9t6) 921-9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal SS#0187, 280045 85 - Sampled 03/09/98 <br /> 6747 Sierra Court Suite J Sample Descript U-9 Received 03/09/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/11/98 <br /> Attention Deanna Harding Lab Number 9803524-10 Reported 03118198 <br /> QC Batch Number GC031198BTEX21A <br /> Instrument ID GCHP21 <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 50 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 104 <br /> 9 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> :SE;UOIA LYTiCAL - ELAP #1210 <br /> egory <br /> Project Manager Page 10 <br />