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Base de datos CISDOC

ID (ISN) del documento22368
Número CIS 75-209
ISSN - Título de la serie 0097-6326 - Federal Register
Año 1974
Número de serie
Autor(es)
Code of Federal Regulations, Title 30, Chapter 1. Bureau of Mines, Department of the Interior, Washington, D.C.
Título Miscellaneous amendments to 30 CFR Parts 55 - Health and safety standards: Metal and nonmetallic open pit mines; 56 - Health and safety standards: Sand, gravel and crushed stone operations; and 57 - Health and safety standards: Metal and nonmetallic underground mines.
Información bibliográfica 1 july 1974, Vol.39, No.127, p.24316-24320.
Resumen These amendments, dated 26 june 1974, became effective on 1 July 1974. They prescribe that exposure to airborne contaminants must not exceed the TLVs adopted by the ACGIH, and that the 8-h time-weighted average airborne concentration of asbestos dust to which workers are exposed must not exceed 5 fibres >5µm in length per ml, as determined by the membrane filter method. Control of employee exposure must be preferably by prevention of contamination, removal by exhaust ventilation or by dilution with uncontaminated air. Other provisions concern respirators, blasting agents, avoidance of spark or flame in repairing premise used for storage of explosives, coupling of oxygen hoses to jet-piercing drills, electrical equipment, prevention of over-travel of man hoists, etc.
Descriptores (primarios) Estados Unidos; polvos; minas; separación, selección; pulverización
Descriptores (secundarios) valores umbrales; lucha contra los polvos; agentes de voladura; ley; prevención de las explosiones; respiradores; amianto
Tipo de documento A - Leyes, reglamentos, directivas
País / Estado o ProvinciaEstados Unidos
Tema(s) Normas y directivas con fuerza de ley
Broad subject area(s) Industrias y ocupaciones
Navegación por categoria(s) Mining and quarrying