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SequoiaJ Chesapeake Drive Redwood City, CA 94063 50) 364 9600 FAX`650)364 9233 <br /> 404 N Wi8et Lane Walnut Creek CA 94598 (510) 988 9600 FAX 510)988 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 MO <br /> Gettler Ryan/Geostrategles Client Prol ID Unocal SS#0187 -- _ µ Sampled 02/13/98 , <br /> 6747 Sierra Court Suite J Sample Descript U-9 Received 02/17/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/25/98 <br /> Attention Deanna Harding_ Lab Number_9802A45-10 _ Reparted 03j02198_ <br /> QC Batch Number GCO22598802005A <br /> Instrument ID GCHP05 <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 % % Recove <br /> Trifluorotoluene 70 130 82 <br /> I <br /> i <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br />* ry <br /> 0ject anger Page 10 <br />