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4D (91Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-%W FM(650)364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(9Z5)988-9673 <br /> Analytical $19 Striker Avenue Suite 8 Sacramento.CAma. 95834 <br /> 6)92 -9600 FAX�916�921-0100 <br /> 1455 McDowell Blvd North Ste D PetaluCA 94954 707 792-1865 FAX 707 792-0342 <br /> Opgradient Environmental Consultants Project Conrady Property Sampled 12/7198 <br /> 336 Augusta Court Project Number NIA Received 1218198 <br /> Valley S ,CA 95252 Project Manager 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 /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> mw--5 S812111-05 Water <br /> Ethanol 8120203 12/11/98 12/11/98 3000 ND ugll <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-amyl methyl ether 200 ND " <br /> Surrogate 12-DCA-d4 " 600-140 107 <br /> MML-6 5812111-064C <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 /> Dl-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND <br /> 0rrogate 12-DCA-d4 600-140 130 <br /> VW-1 5812111-07 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 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate 1,2-DCA-d4 600-140 136 % <br /> VFW 2 5812111-08 Water <br /> Ethanol 8120205 12/10198 12/10/98 3000 ND ug/! <br /> Tert-butyi 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-amyl methyl ether 200 ND <br /> Surrogate 12-DCA-d4 60 0440 123 <br /> SW-1 5812111-09 Water <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 /> lopuoiaAnalytical-Sacramento *Refer to end of report far tex of notes and definitions <br /> I� <br /> Linda C Schneider,Laborato ry Director Page 5 of 12 <br />