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<br />3 <br />TABLE 1. - Cement kiln dust samples received, by Statel <br /> <br />State Number of <br />samples <br />State Number of <br />samples <br />State Number of <br />samples <br />Alabama...... 4 Kentucky....... 1 Ohio........... 5 <br />Arizona...... 3 Louisiana...... 1 Oklahoma....... 3 <br />Arkansas..... 2 Maine.......... 0 Oregon......... 1 <br />California... 11 Maryland....... 3 Pennsylvania... 9 <br />Colorado..... 4 Michigan....... 3 South Carolina. 1 <br />Florida...... 2 Mississippi.... 1 South Dakota... 3 <br />Georgia...... 1 Missouri....... 6 Tennessee...... S <br />Hawaii....... 1 Montana........ 1 Texas.......... 14 <br />Idaho........ 1 Nebraska....... 3 Utah........... 1 <br />Illinois..... 2 Nevada......... 0 Virginia....... 1 <br />Indiana...... 2 New Mexico..... 1 Washington..... 4 <br />Iowa......... 4 New York....... 2 Wisconsin...... 0 <br />Kansas....... 5 North Carolina. 1 W owing........ 1 <br />Only those States are listed that have cement plants in operation. <br />3. The minus 100-mesh material <br />(~ 1/2 gallon) was reblended Eor <br />30 minutes. <br />4. The sample was then riffle- <br />split again into two fractions for char- <br />acterization. <br />100-mesh material. The extraction pro- <br />cedure (EP) toxicity leach test was <br />performed on the blended as-received <br />material. Samples were coded based on <br />receipt date, and the tables of data <br />have no correlation with the State <br />Listings in table 1. <br />A11 mineralogical and chemical ana- <br />lysis data were obtained using the minus <br />MINERALOGY <br />Standard X-ray diffraction proce- <br />dures using CuKa radiation were <br />performed on the minus 100-mesh material <br />to determine the minerals present. <br />The results are given in table 2. All <br />but seven samples contained calcite <br />(CaC03) as a major constituent, <br />and those seven samples had calcite as a <br />minor constituent. A11 but two samples <br />contained quartz (Si02). Lime <br />(Ca0) and anhydrite (CaSOy) were <br />present in most samples; amounts ranged <br />Erom <5 to >30 wt-pct. Other minerals <br />identified in the samples included aph- <br />thitalite [(K,Na)2SOy, nine samples], <br />arcanite (KZSOy, nine samples), sylvite <br />(KC1, nine samples), slaked lime <br />[Ca(OH)Z, six samples], halite (NaCl, <br />one sample), and gypsum (CaSOy•2H2O, one <br />sample). Two samples contained low levels <br />of chlorite [Mg3(Si4010)(OH)Z•Mg3(OH)6]. <br />