Lowell Chandler held up the palms of his hands so members of the Missoula City Council and the public could see the black smears from his home near the rail yard. Chandler had rubbed his hand on a railing before speaking Wednesday at a Public Safety and Health Committee meeting about the way train operations and the rail yard affect Missoula residents. “There’s definitely coal dust coming off the trains,” Chandler said. “I don’t know if it’s from the loaded trains or the empty trains.”