Los valores límites permisibles para concentraciones de polvo con contenido de sílice superior al 5%, se fijarán mediante análisis químico de SiO2 que realicen laboratorios especializados y las reglamentaciones que para este caso dicte la Sección de Normas y Control de la División de Seguridad e Higiene Minera del Ministerio de Minas y Energía.
Decreto 1335 de 1987 →In force
Article 49
Decreto 1335 de 1987 · mediante el cual se expide el reglamento de seguridad de las labores subterráneas.
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