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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wget Lane walnut Creek C4 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 /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> I <br /> gradient Environmental Consultants Project Conrady Property Sampled 1217198 <br /> 6 Augusta Court Project Number NIA Received 1218198 <br /> lle S ,CA 95252 Pira ect Manager Vic Cherven Reported 12130198 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> M'��-1 5812111-01 Water <br /> Ethanol 8120205 12/10/98 12/10/98 3000 ND ug/1 <br /> Tert-butyl alcohol 1. 200 ND " <br /> Methyl tert-butyl ether to200 150 " <br /> Di-isopropyl ether to200 ND " <br /> Ethyl Cert butyl ether 200 ND " <br /> Tert-amyl methyl ether I, to 200 ND " <br /> Surrogate 12-DCA-d4 10 to 600-140 119 % <br /> Ethanol 8120340 12/28/98 12/28/98 3000 ND ug/1 <br /> Tert-butyl alcohol 200 ND " <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether " " It 200 ND It <br /> Tert-amyl methyl ether to 11200 ND " <br /> Surrogate 1 2-DCA-d4 " 11 <br /> to <br /> 600-140 120 % <br /> S812111-02 Water <br /> hano1 8120205 12/10/98 12/10/98 3000 ND ug/l <br /> Tert-butyl alcohol it 11200 ND <br /> Methyl tert-butyl ether 11 It 200 ND " <br /> Di-isopropyl ether to 11200 ND " <br /> Ethyl tent-butyl ether " 200 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate 1,1-DCA-d4 600-140 113 % <br /> MW-3 5812111-03 Water <br /> Ethanol 8120205 12/10/98 12/10/98 3000 ND ug/1 <br /> Tert-butyl alcohol " 200 ND " <br /> Methyl tert-butyl ether " 200 ND " <br /> Di-isopropyl ether to 1. 200 ND " <br /> Ethyl tert-butyl ether 1. 1. 200 ND " <br /> Tert-amyl methyl ether 41 to 200 ND " <br /> Surrogate 1,1-DCA-d4 600-140 127 % <br /> MW 5812111--0 Wale <br /> Ethanol 8120205 12/10/98 12/10/98 3000 ND ug/l <br /> Tert-butyl alcohol " 200 ND " <br /> Methyl Cert-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 11-DCA-d4 to to 1. 600-140 121 °Jo <br /> uoia Analytical-Sacramento *Refer to end ofreport for text of notes and definitions <br /> Linda C Schneider,Laboratory Director Page 4 of 12 <br />