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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 {650) 364 9600 FAX(650)364-9233 <br /> ,!D404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Iwo Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> 4 Gettler RyanZGeostrategies - - Client Prof 1D t Unocal SS#5885 ' -' 'µ-Sample-d--0-3--/-25-%98 ' s <br /> 18747 Sierra ourt Suite J Sample Descript MW-7S Received 03/25/98 ,- <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/03/98 <br /> = Attention Deanna Harding _ Lab Number 9803G84-12 Reported 04J08J98 <br /> QC Batch Number GC040398802009A <br /> Instrument ID GCHP09 <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 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 9$ <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01271 <br /> 4Wt <br /> oryanager Page 6 <br />