H.R. 987, the Workplace Preservation Act; H.R. 1438, the Safety and Health Audit Promotion Act; H.R. 1439, the Safety and Health Audit Promotion and Whistleblower Improvement Act, and H.R. 1459, the Models of Safety and Health Excellence Act : hearing before the Subcommittee on Workforce Protections of the Committee on Education and the Workforce, House of Representatives, One Hundred Sixth Congress, first session, hearing held in Washington, DC, April 21, 1999.