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Airborne Asbestos Fiber Concentrations in Asbestos Mines and Mills in the United States.

PB222611

Publication Date	1973
Personal Author	Schultz, L.; Bank, W.; Weems, G.
Page Count	20
Abstract	Personnel of the Bureau of Mines have conducted investigations in the principal asbestos mines and mills in the United States to determine the concentration of airborne asbestos fibers in the work place, and to establish the exposure of workers to such fibers. The surveys were conducted using the sampling and evaluation method recommended by the National Institute for Occupational Safety and Health. The method consists of collecting the airborne sample on filters and, after appropriate sample preparation, counting the fibers utilizing phase contrast microscopy. The results of the investigation show that fiber concentrations are low in the asbestos mines but high in the asbestos mills, ranging well above 5 fibers/ml of air based on a count of fibers greater than 5 micrometers in length.
Keywords	Industrial hygiene Asbestos Mining Mills Fibers Thresholds(Perception) Exposure Industrial medicine Indoor air pollution
Source Agency	Bureau of Mines
NTIS Subject Category	57U - Public Health & Industrial Medicine 68G - Environmental Health & Safety
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Supplemental Notes	Prepared in cooperation with Denver Technical Support Center, Colo.
Document Type	Technical Report
Title Note	Technical progress rept.
NTIS Issue Number	197320

Airborne Asbestos Fiber Concentrations in Asbestos Mines and Mills in the United States.

Airborne Asbestos Fiber Concentrations in Asbestos Mines and Mills in the United States.
PB222611

Publication Date	1973
Personal Author	Schultz, L.; Bank, W.; Weems, G.
Page Count	20
Abstract	Personnel of the Bureau of Mines have conducted investigations in the principal asbestos mines and mills in the United States to determine the concentration of airborne asbestos fibers in the work place, and to establish the exposure of workers to such fibers. The surveys were conducted using the sampling and evaluation method recommended by the National Institute for Occupational Safety and Health. The method consists of collecting the airborne sample on filters and, after appropriate sample preparation, counting the fibers utilizing phase contrast microscopy. The results of the investigation show that fiber concentrations are low in the asbestos mines but high in the asbestos mills, ranging well above 5 fibers/ml of air based on a count of fibers greater than 5 micrometers in length.
Keywords	Industrial hygiene Asbestos Mining Mills Fibers Thresholds(Perception) Exposure Industrial medicine Indoor air pollution
Source Agency	Bureau of Mines
NTIS Subject Category	57U - Public Health & Industrial Medicine 68G - Environmental Health & Safety
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Supplemental Notes	Prepared in cooperation with Denver Technical Support Center, Colo.
Document Type	Technical Report
Title Note	Technical progress rept.
NTIS Issue Number	197320