41. Two years later, the organization adopted its first list of 148 exposure limits , then referred to as Maximum Allowable Concentrations. 42. The National Institute for Occupational Safety and Health has designated a recommended exposure limit of 0.5 ppm over 15 minutes. 43. Radiation exposure limits prior to the accident were 100 r�ntgens to save a life and 25 to save valuable property. 44. The National Institute for Occupational Safety and Health report came a year later, recommending a much lower asbestos exposure limit . 45. There is now a move under way at DOE a push the exposure limits to as low as practically possible, 46. When they exceed their allowable radiation exposure limit at a specific facility, they often migrate to a different nuclear facility. 47. Occupational exposure limits are based on available toxicology and epidemiology data to protect nearly all workers over a working lifetime. 48. They proposed a permissible exposure limit , or PEL, of . 2 milligrams per cubic meter of air over an eight-hour workday. 49. The NIOSH recommended skin exposure limit for a work related time weighted average concentration is 4ppm ( 18mg / m3 ). 50. The exposure assessment is initiated by selecting the appropriate exposure limit averaging time and " decision statistic " for the agent.
