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(D• 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9Z33 <br /> Sequoia 404 N Wiget Lane Walnut Creek,CA 94598 (925)9a8-9600 FAX(925)988-9673 <br /> fall>� 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 /> Geitler Ryan/Geastrategies Client Prol ID Chevron 9-6171, Stockton "Sampled 08/18/98 - " <br /> 12 6747 Sierra court Suite J Sample Descnpt MW-2 Received 08/18/98 _ <br /> 3.1 Dublin, CA 94568 Matrix LIQUID x <br /> Analysis Method 8015Mod/8020 Analyzed 08/31/98 <br />=s Attention Deanna Harding " " Lab Number 9808624-07 Reported 09j04j98 <br /> _ " _ ____ _ _ _ _ _ - <br /> QC Batch Number GC083198802009A <br /> Instrument ID HP9 <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 ..... 270 <br /> Methyl t-Butyl Ether 25 ... 90 <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 /> Unidentified HC ..... --- - --• --- - >C8 <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 299 Q <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> iary <br /> ralect Manager Page 7 <br />