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I . 5.9 Noise <. f Work around large equipment often creates, excessive noise. The effects of noise can include: ❑ Workers being startled, annoyed,;or distracted i ❑ Physical damage to the ear, pain`; and temporary and/or permanent hearing loss ❑ Communication interference that.:may increase potential hazards due to the 1 inability to warn of danger and!the proper safety precautions to be taken. If employees are subjected to noise exceeding an 8-hour, time-weighted average sound level of 90 Dba (decibels on the A-weighted scale), feasible administrative or engineering controls must be utilized. In addition, whenever employee noise exposures equal or L exceed an 8-hour, time-weighted average< sound level of 85 Dba, employers must `.. administer a continuing, effective hearing conservation program as described in OSHA regulation 29 CFR Part 1910.95. 5.10 Ionizing Radiation Radioactive materials emit one or more of three types of harmful radiation: alpha, beta, and gamma. Alpha radiation has limited penetration ability and is usually stopped by clothing and the outer layers of skin. Alpha radiation poses little threat outside the body, but can be hazardous if materials that emit alpha radiation are inhaled or ingested. _ 4 Beta radiation can cause harmful "beta burns" to the skin and damage the subsurface blood system. Beta radiation is also hazardous if materials that emit beta radiation are inhaled or ingested. Use of protective clothing, coupled with scrupulous personal hygiene and decontamination, affords good protection against alpha and beta radiation., 1. 4 Gamma radiation easily passes through clortling and human tissue and can also cause Ia serious permanent damage to the body:' :Chemical-protective clothing affords no protection against gamma radiation itself; h6wever, use of respiratory and other protective ' s:\13FS\ST0CKT0N\H5P001f 10/15/99 t5"10