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fs <br /> Sequoia 6"0'ch—l"'aife DriveRe&wood aty CA 94063 (650)364-9600 FAX(650)384-9233 <br /> 404 N wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(975)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9ZI-0100 <br /> frlll� Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 77 Gettler Ryan/Geostrategles—� Client Proj ID Tosco SS#6981, 180138 85 Sampled 05/27/98 _ <br /> '. 6 747 Sierra Court Suite,i Sample Descript VW-4 Received 05/28/98 - <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 06/04/98 <br /> Attention Deanna Hard_in_g _ Lab Number 9805H47-13_ _ _ _ _ _ Reported_07j24f98 - <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 1000 3900 <br /> Methyl t-Butyl Ether 50 N D <br /> Benzene 10 N D <br /> Toluene 10 N D <br /> Ethyl Benzene 10 N D <br /> Xylenes (Total) 10 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Tnfiluorotoluene 70 130 97 <br /> Analytes reported as N D were not present above the stated firrnt of detection <br /> SEQUOIA ANALYTICAL - ELAP #1849 <br /> Tojftanicher <br /> PrJW Manager Page 25 <br />