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oldodolNorth State Environmental <br />Chemical Waste Disposal • Trucking • Consulting <br />CERTIFICATE OF ANALYSIS <br />Job Number: 98-305 <br />Client : Semco <br />Project : Corral Hollow Rd. <br />Date Sampled : 03/18/96 <br />Date Analyzed: 03/19/98 <br />Date Reported: 03/30/98 <br />Volatile Organics by GC/MS Method 8260 <br />Laboratory Number <br />98-305-60 <br />98-305-61 <br />98-305-62 <br />98-305-82 <br />98-305-83 <br />Client ID <br />T -2-E-13 <br />T -2-M-13 <br />T -2-W-13 <br />D-9-40 <br />DP -9-42 <br />Matrix <br />SOIL <br />SOIL <br />SOIL <br />SOIL <br />SOIL <br />Analyte <br />ug/Kg <br />ug/Kg <br />ug/Kg <br />ug/Kg <br />ug/Kg <br />Ethanol <br />ND<2500 <br />ND<2500 <br />ND<2500 <br />ND<2500 <br />ND<2500 <br />Methyl -t -Butyl Ether <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />Di -isopropyl Ether <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />tertiary Butyl Alcohol <br />ND<5 <br />ND<5 <br />ND<5 <br />NO<5 <br />ND<5 <br />Ethyl -t -Butyl Ether <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />t -Amyl Methyl Ether <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />SUR-Dibroatofluoromethane <br />137% Rec <br />131% Rec <br />1406 Rec <br />1419 Rec <br />1366 Rec <br />SUR -Toluene -d8 <br />1386 Rec <br />1326 Rec <br />1346 Rec <br />1396 Rec <br />1246 Rec <br />SUR-4-Bromofluorobenzene <br />1276 Rec <br />1256 Rec <br />1256 Rec <br />1256 Rec <br />1276 Rec <br />Page 4 Of 5 <br />P. 0. Box 5624 • South San Francisco, California 94083 • 650-588-2838 FAX 588-1950 <br />