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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364-9Z33 <br /> 5t0 9 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX( ) 9673 <br /> $19 Straker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(<)t6)92i21 0100 <br /> 1QF Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)792-0342 <br /> 0 <br /> I Gettler Ryan/Geostrategies Client Prod ID Unocal 5421, Stockton Sampled 04/16/98 <br /> 6747 Sierra Court Suite J Sample Descript US-7 Comp Received 04/17/98 <br /> Dublin, CA 94568 Matrix SOLID Extracted 04/24/98 <br /> Analysis Method 8015Mod/8020 Analyzed 04/24/98 <br /> Attention Clyde Galantine Lab Number 9804692-07 Reported 05/01198 <br /> OC Batch Number SP0424988020EXA <br /> Instrument ID GCHPO4 <br /> Total Purgeable Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas - 20 140 <br /> Methyl t-Butyl Ether 050 N D <br /> Benzene 010 N D <br /> Toluene 0 10 082 <br /> Ethyl Benzene 010 1 4 <br /> Xylenes (Total) 010 8 4 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 1670 <br /> 4-Bromofluorobenzene 60 140 Q <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUQIAïż½ ALYTlCAL - ELAP #1271 <br /> e egory <br /> Project Manager Page 8 <br />