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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9133 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> a)a) Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921-0100 <br /> Upgradlent Environmental Consultants Project Conrady Sampled 7/6/98 <br /> 336 Augusta Court Project Number N/A Received 7/7/98 <br /> Valley Sp,CA 95252 Project Manager Vic Cherven Reported 7/23/98 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Anal to Number Prepared Analyzed Limits Limit Result Units Notes' <br /> MW-5(canttT nUed) S807053-04 Aater <br /> Tert-amyl methyl ether 8070311 7/16/98 7/16/98 200 ND ug/l <br /> Surrogate 1 2-DCA-d4 600-140 105 % <br /> MW-6 5,807053-05 Water <br /> Tert-butyl alcohol 8070311 7/16/98 7/16198 200 ND ug/l <br /> Methyl tert-butyl ether " 11 200 ND " <br /> DL-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether " " " 200 ND " <br /> Tert-amyl methyl ether " " 200 ND " <br /> Surrogate 1,1-DCA-d4 600-140 101 % <br /> VE-1 5807053-06 Watei <br /> 0t-butyl <br /> alcohol 8070311 7/16198 7/16/98 200 ND ug/l <br /> hyl tent-butyl ether 200 ND " <br /> D1-isopropyl ether 200 ND " <br /> Ethyl tent-butyl ether 200 ND " <br /> Tert-amyl methyl ether " " 200 ND " <br /> Surrogate 1,2-DCA-d4 Of <br /> 600-140 112 % <br /> VE-2 5807053-07 Wate[ <br /> Tert-butyl alcohol 8070312 7/17198 7/17/98 200 ND ug/l <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate 1,1-DCA-d4 " 600-140 133 % <br /> SW-1 5807053-08 Watt <br /> Tert-butyl alcohol 8070312 7/17/98 7/17/98 200 ND ug/l <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tent-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate 1 2-DCA-d4 600-140 140 % <br /> AML <br /> uo,i� yticalA -Sacramento *Refer to end of report for tett of notes and definitions <br /> C <br /> da C Schnetde ,Laboratory Director Page 5 of 1 l <br />