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<br />CONTENTS <br /> <br />Page <br />Abstract ........................................................... 1 <br />Introduction ....................................................... 2 <br />Samples ............................................................ 2 <br />Mineralogy ......................................................... 3 <br />Chemical analyses .................................................. 6 <br />Chemically bout water, carbon dioxide,and noncatbonate carbon. 6 <br />Anions ........................................................ 8 <br />Major, minor, and trace elements .............................. 8 <br />Interelement correlations ..................................... 17 <br />EPA hazardous waste test ........................................... 18 <br />Summary and conclusions ............................................ l8 <br />References ......................................................... 19 <br />TABLES <br />1. Cement kiln dust samples received, by State ................... 3 <br />2. Mineralogical composition of U.S. cement kiln <br /> dust samples ................................................ 4 <br />3. Chemically bound water, COZ, and noncarbonate <br /> carbon in U.S. cement kiln dust ............................. 7 <br />4. Anions in U.S. cement kiln dust ............................... 9 <br />5. Comparison of NBS SRM-637 certificate values with Bureau of <br /> Mines analytical method values .............................. 10 <br />6. Major and minor elements in U.S. cement kiln dust ............. 11 <br />7. Trace elements in U.S. cement kiln dust ....................... 13 <br />8. Elemental and anion variation in U.S. cement kiln <br /> dust ........................................................ I6 <br />9. Mercury in selected U.S. cement kiln dust samples ............. L7 <br />10. Interelement correlation coefficients for U. S. cement <br /> kiln dust ................................................... 17 <br />ll. Maximum concentration of contaminants allowed for <br /> EP toxicity test ............................................ LS <br />