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Sequoia 6aO Chesapeake Drive Redwood City CA 94063 (650),364-9600 FAX(650)364-9233 <br /> 404 N Wlget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)908-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9Zt-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Upgradient Environmental Consultants Project Conrady Property Sampled 1217198 <br /> 336 Augusta Court Project Number NIA Received 1218198 <br /> Valley SR.CA 95252 Pro ect Mana er Vic Cherven Reported 12/30/98 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Anal a Number Prepared Analyzed Limits Limit Result Units Notes* <br /> SW-1 (cantinM) 8812111-09 W ateE <br /> Tert-amyl methyl ether 8120205 12/10/98 12/10/98 200 ND ug/l <br /> Surrogate 12-DCA-d4 " 600-140 129 '/o <br /> SW-2 5812111-10 Watec <br /> Ethanol 8120205 12/10/98 12/10/98 3000 ND ug/l <br /> Tert-butyl alcohol 200 ND " <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether " 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyi methyl ether 200 ND " <br /> Surrogate 1,2-DCA-d4 600-140 120 YO <br /> uoia Analytical-Sacramento *Refer to end of report for texi of nates and definitions <br /> tnda C Schneider,Laboratory Director Page 6 of 12 <br />