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Asbesto crisotilo en una zona recreativa de California
Science (New York, N.Y.)
|November 9, 1979
Resumen
Una caída de polvo recreativo en California.
Área de la Ciencia:
- Ciencias del medio ambiente Ciencias del medio ambiente.
- Geología Geología Geología.
- Salud ocupacional y salud en el trabajo.
Sus antecedentes:
- Las formaciones geológicas de serpentinita pueden contener amianto de forma natural.
- Las actividades recreativas en depósitos naturales pueden conducir a la exposición.
- El amianto crisotilo es un peligro conocido para la salud.
Objetivo del estudio:
- Para cuantificar los niveles de exposición al amianto por la caída de polvo natural.
- Para evaluar los riesgos para la salud de los usuarios recreativos en el área de Clear Creek.
- Para comparar los niveles de exposición con los estándares ocupacionales.
Principales métodos:
- Muestras de caída de polvo recolectadas a lo largo de caminos y senderos recreativos.
- Muestras de aire personales utilizadas por motociclistas en senderos.
- Concentraciones de fibra en el aire analizadas utilizando métodos de monitoreo ocupacional.
Principales resultados:
- Las muestras de las caídas de polvo fueron de 90% o más de amianto crisotilo.
- Las concentraciones de fibra en el aire oscilaron entre 0,3 y 5,3 fibras/mL.
- La concentración media total de polvo fue de aproximadamente 20 mg/m3, con un 90% de crisotilo.
Conclusiones:
- La exposición significativa al asbesto se produce a partir de depósitos naturales de serpentinita durante la recreación.
- Los niveles de exposición medidos se acercan o exceden las normas profesionales propuestas.
- Este es el primer informe de exposición al asbesto de gran magnitud de depósitos naturales no perturbados.
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