MSHA chief says new silica rule is personal
TRIDELPHIA, W.Va. --- U.S. Assistant Secretary for Mine Safety Chris Williamson says the recently approved changes to the silica dust rules in U.S. mines was one of his greatest go…
TRIDELPHIA, W.Va. --- U.S. Assistant Secretary for Mine Safety Chris Williamson says the recently approved changes to the silica dust rules in U.S. mines was one of his greatest go…