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0$diolNorth 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 : 03/18/98 <br />Date Analyzed: 03/19/98 <br />Date Reported: 03/30/98 <br />Volatile Organics by GC/MS Method 8260 <br />Laboratory Number <br />98-305-47 <br />98-305-48 <br />98-305-49 <br />98-305-57 <br />98-305-58 <br />98-305-59 <br />Client ID <br />D1-48 <br />D1-72 <br />D2-72 <br />T -1-E-13 <br />T -1-M-13 <br />T -1-W-13 <br />Matrix <br />SOIL <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 />ug/Kg <br />Ethanol <br />ND<2500 <br />ND<2500 <br />MD<2500 <br />ND<2500 <br />ND<2500 <br />ND<2500 <br />Methyl -t -Butyl Ether <br />ND<5 <br />ND<5 <br />180 <br />27 <br />ND<5 <br />26 <br />Di -isopropyl Ether <br />ND<5 <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 />ND<5 <br />ND<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 />ND<5 <br />t -Amyl Methyl Ether <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />ND<5 <br />SUR-DibrnmofluoroMethane <br />132% Rec <br />1304 Rec <br />1428 Rec <br />1368 Rec <br />147% Rec <br />136% Rec <br />SUR -Toluene -d8 <br />132% Rec <br />135% Rec <br />117% Rec <br />84 9 Rec <br />1349 Rec <br />132% Rec <br />SUR-4-firomofluorobenzene <br />1189 Rec <br />1229 Rec <br />1149 Rec <br />1489 Rec <br />1279 Rec <br />1239 Rec <br />Page 3 Of 5 <br />P. 0. Box 5624 • South San Francisco, California 94083 • 650-588-2838 FAX 588-1950 <br />