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• Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707}792-1865 FAX(707)792-0342 <br /> I • <br /> Gettler Ryan/Geostrategles Client Pro' 1D Unocal 6981, 14012404 Sampled 08/27/98 <br /> 6747 Sierra Court Suite J Sample Descript Inf Received 08/28/98 <br /> Dublin, CA 94568 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 08/29/98 <br /> Attention Steve Carter Lab Number 9808H51-01 Reported 09f08f98 <br /> QC Batch Number GC082998STEX30A <br /> Instrument ID GCHP30 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 270 <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 3 7 <br /> Chromatogram Pattern <br /> Gas& Unidentified HC >C10 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 113 <br /> • <br /> Analytes reported as IN D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> ranicher <br /> Project Manager Page t <br />