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OP4North State Environmental <br /> Chemical Waste Disposal • Trucking Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Job Number: 98-1683 Date Sampled : 12/10/98 <br /> Client : Chromalab Date Analyzed: 12/23/98 <br /> Project : 9812196 Date Reported: 12/31/98 <br /> Volatile Organics by GC/MS Method 8260 <br /> Quality Control/Quality Assurance Summary <br /> Laboratory Number 98-1683 MS/MSD RPD <br /> Client ID Blank Recovery <br /> Matrix SOIL SOIL <br /> Analyte Results %Recoveries <br /> ug/Kg <br /> Bromochloromethane ND<25 <br /> Dichlorodifluoromethane ND<25 <br /> Chloromethane ND<25 <br /> Vinyl Chloride ND<25 <br /> Bromomethane ND<25 <br /> Chloroethane ND<25 <br /> Trichlorofluoromethane ND<5 <br /> Dichloroethene ND<5 89 2 <br /> 1%.a-one ND4250 <br /> Trichlorotrifluoroethane ND<5 <br /> Methylene Chloride ND<5 <br /> t-1,2-Dichloroethene ND<5 <br /> Methyl-t-butyl Ether ND<5 <br /> 1,1-Dichloroethane ND<5 <br /> 2,2-Dichloropropane ND<5 <br /> cis-1,2-Dichloroethene ND<5 <br /> 2-Butanone ND<50 <br /> Chloroform ND<5 <br /> 1,1,1-Trichloroethane ND<5 <br /> Carbon Tetrachloride ND<5 <br /> 1,1-Dichloropropene ND<5 <br /> Benzene ND<5 107 2 <br /> 1,2-Dichloroethane ND<5 <br /> Trichloroethene ND<5 110 3 <br /> 1,2-Dichloropropane ND<5 <br /> Dibromomethane ND<5 <br /> Bromodichloromethane ND<5 <br /> trans-1,3-Dichloropropene ND<5 <br /> 4-Methyl-2-Pentenone ND<50 <br /> Toluene ND<5 103 1 <br /> Cis-1,3-Dichloropropene ND<5 <br /> 1,1,2-Trichloroethane ND<5 <br /> Tetrachloroethene ND<5 <br /> 1,3-Dichloropropane ND<5 <br /> 2-Hexanone ND<50 <br /> Dibromochloromethane ND<5 <br /> '-Dibromoethane ND<5 <br /> lkm..arobenzene ND<5 109 1 <br /> 1,1,1,2-Tetrachloroethane ND<5 <br /> Ethylbenzene ND<5 <br /> m,p-Xylene ND<5 <br /> Page 3 Of 4 <br /> P. 0 . Box 5624 South San Francisco, California 94083 650 - 588-2838 FAX 588- 1950 <br />