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• 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia <br /> r'Yl 404 N Wtget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 'Wr Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> Blaine Tech Services Client Prod ID Chevron 9-4275/980910-Z2 Sampled 09/10/98 <br /> 1680 Rogers Avenue Sample Descnpt MW-7 Received 09/11/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 09/17/98 <br /> Attention Fran Thie Lab Number 9809721-07 Reported 09f25/98 <br /> QC Batch Number GC091798802009A <br /> Instrument ID HP9 <br /> Total Purgeable 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 51 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Tri luorotoluene 70 130 103 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA NA ICAL - ELAP #1271 <br /> —0 r <br /> ct Manager Page 7 <br />