Workplace safety and asbestos contamination : hearing of the Committee on Health, Education, Labor, and Pensions, United States Senate, One Hundred Seventh Congress, first session on examining workplace safety and asbestos contamination, focusing on the combined authority and efforts of the Occupational Safety and Health Administration, Mine Safety and Health Administration, and the Environmental Protection Agency to prescribe and enforce regulations to prevent health risks to workers from exposure to airborne asbestos, July 31, 2001.