| ID (ISN) del documento | 24823 |
| Número CIS |
76-675 |
| ISSN - Título de la serie |
0097-6326 - Federal Register |
| Año |
1974 |
| Número de serie |
|
| Título |
Amendment 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 |
Code of Federal Regulations, Title 30, Chapter 1. Bureau of Mines, Department of the Interior, Washington, D.C. Washington, D.C., USA, 7 Aug. 1974, Vol.39, no.153, p.28433-28434. |
| Resumen |
These amendments, dated 2 Aug. 1974, became effective on 7 Aug. 1974. The standards are revised to prescribe that no employee shall be permitted an exposure to noise in excess of 90dBA for 8h a day, 92dBA:6h, 95dBA:4h, 97dBA:3h, 100dBA:2h, 102dBA:1h30min, 105dBA:1h, 110dBA:30min, 115dBA:15min or less. No exposure to exceed 115dBA. Impact or impulsive noise not to exceed 140dBA peak sound pressure level. When the daily noise exposure is composed of two or more periods of noise exposure at different levels, their combined effect shall be considered rather than the individual effect of each. |
| Descriptores (primarios) |
Estados Unidos; industrias de extracción; lucha contra el ruido; ruido |
| Descriptores (secundarios) |
criterios de nocividad del ruido; ruido recurrente; nivel de ruido; ley; trabajos a cielo abierto; limitación de la exposición; trabajos subterráneos |
| Tipo de documento |
A - Leyes, reglamentos, directivas |
| País / Estado o Provincia | Estados Unidos |
| Tema(s) |
Normas y directivas con fuerza de ley
|
| Broad subject area(s) |
Riesgos físicos
|
| Navegación por categoria(s) |
Noise
Mining and quarrying
|
