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+ cA 4406_ 650) 364 9600 FAX{650)364 9133 <br /> Sequoia 8o Chesapeake Dnve Redwood City <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 989 %00 FAX(510)988%73 <br /> fr�Il� Analytical 819 Stnker Avenue,Suite B Sacramento,CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Prod ID Unocal SS#0187, 280045 85 Sampled 03/09/98 <br /> 6747 Sierra Court Suite J Sample Descript TB-LB Received 03/09/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/10/98 <br /> Attention Deanna Harding Lab Number 9803523-01 Reported 03J18198 <br /> QC Batch Number GC031098BTEX03A <br /> Instrument 1D GCHP3 <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 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 93 <br /> Anaiytes reported as N D were not present above the stated Itmd of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> egory <br /> Project Manager Page 4 <br />