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680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650)364-9233 <br /> (D Sequoia404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> l 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> faller Analytica <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal 5421, 140162 02 Sampled 04/16/98 <br /> ' 6747 Sierra Court Suite J Sample Descript US-11(comp) Received 04/17/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/22/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/23/98 <br /> Attention Clyde Galantine Lab Number 9804C43-01 Reported 04f30/98 <br /> QC Batch Number GC042298BTEXEXB <br /> Instrument ID GCHP07 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 500 2700 <br /> Methyl t-Butyl Ether 12 N D <br /> Benzene 2.5 20 <br /> Toluene 2 5 190 <br /> Ethyl Benzene 2 5 54 <br /> Xylenes (Total) 2 5 300 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 110 <br /> 4-Bromofluorobenzene 60 140 5 Q <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA AN LYTICAL - ELAP 01210 <br /> gory <br /> sect Manager Page 3 <br />