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<br />is <br />TABLE 7. - Trace elements in U.S. cement kiln dust, ug/gl-Continued <br />Sample Ag As Cd Ct Cu Li Mn Ni Pb Sb Zn <br />21 11 5.1 8.6 29 27 <4 440 26 154 <1.6 299 <br />22 11 6.3 22 48 30 23 489 33 204 1.6 500 <br />23 11 34 22 172 34 62 139 18 454 1.9 774 <br />24 14 11 6.4 47 57 18 204 34 278 3.4 475 <br />25 11 9.3 6.2 35 18 <4 668 24 101 C1.6 67 <br />26 6.7 8.4 6.4 64 18 <4 835 44 132 <1.6 156 <br />27 6.7 11 7.7 43 18 <4 620 36 92 <1.6 162 <br />28 7.0 14 5 18 56 <4 284 22 760 <1.6 1,860 <br />29 6.5 12 4.5 24 94 C4 390 17 322 <1.6 1,330 <br />30 6.5 8.7 5.8 22 18 C4 164 25 246 <1.6 38 <br />31 7.2 19 3.2 34 24 <4 372 22 90 2.1 54 <br />32 5.0 15 3.5 28 17 <4 150 26 76 2.3 53 <br />33 6.0 7.6 5 58 24 24 222 29 73 C1.6 83 <br />34 8.8 31 30 57 40 13 238 59 308 3.9 1,100 <br />35 6.4 32 19 36 40 <4 632 47 56 3.3 180 <br />36 5.9 20 8.2 36 24 14 535 32 128 5.8 228 <br />37 5.0 6.9 5 30 26 IS 224 26 128 3.9 29S <br />38 6.6 6.6 5.4 49 23 18 488 16 112 <1.6 126 <br />39 6.6 4.3 8.9 24 16 <4 174 14 86 <1.6 32 <br />40 6.7 7.6 6 120 20 7.5 390 14 595 3.1 372 <br />41 12 18 8.9 32 42 14 439 34 16l <1.6 167 <br />42 11 6 6.9 42 28 12 128 37 66 1.7 145 <br />43 10 18 8.2 31 27 23 1,370 52 231 2.5 516 <br />44 7.5 7.1 7.3 21 24 11 2,410 41 223 <1.6 155 <br />45 8.4 16 7.6 42 21 12 485 28 166 2.2 952 <br />46 6.9 3.4 11 28 44 42 125 20 446 <1.6 628 <br />47 6.4 8.6 7.8 53 34 11 376 30 494 <1.6 290 <br />48 8.8 3.7 3.8 27 22 8.2 244 22 35 <1.6 105 <br />49 8.6 4.6 8.8 90 54 <4 266 91 368 6.7 391 <br />50 6.6 3 4.9 21 12 12 398 20 111 <1.6 55 <br />S1 9.8 17 8.6 64 30 14 462 33 216 3.9 354 <br />52 3 28 70 34 56 <4 559 20 336 2.4 243 <br />53 7.3 29 6 30 26 <4 343 26 101 2.7 220 <br />54 9.1 8.8 6.4 40 52 <4 236 28 148 3.8 8,660 <br />55 9.7 4.3 9.4 32 39 6.5 240 23 232 3.7 2,740 <br />56 4.2 7.1 8.2 38 22 5 250 28 86 2.6 99 <br />57 14 6.5 20 77 22 21 176 18 1,590 3 468 <br />SS 7.4 11 7 34 23 16 156 32 148 4.4 144 <br />59 14 4 62 31 28 22 408 28 964 <1.6 158 <br />60 11 2.3 18 33 26 18 173 28 202 <1.6 401 <br />61 4.8 12 19 62 30 16 154 <12 132 <1.6 243 <br />62 6.9 9.5 <1.5 36 27 16 252 12 76 <1.6 58 <br />63 6.4 4.9 4 29 16 12 279 <12 36 <1.6 88 <br />64 <3 7.1 4 56 20 20 457 <12 420 <1.6 167 <br />65 C3 3.4 45 28 16 22 90 <12 288 <1.6 Z54 <br />66 <3 33 2.8 39 32 18 677 16 160 <1.6 l67 <br />67 <3 5.2 14 64 28 16 304 12 126 C1.6 113 <br />68 5.3 3.4 13 67 18 20 280 <12 94 C1.6 75 <br />lSee footnote ac end of table. <br />