OSHA has approved the Alaska State Standards Amendments, which have been determined to be at least as effective as the following comparable Federal Standard Amendments: 1910.1025, Occupational Exposure to Lead; 1910.1001 and 1926.58, Asbestos, Tremolite, Anthophyllite and Actinolite; 1910.66, Powered Platforms for Building Maintenance; 1910. 147, Control of Hazardous Energy Sources (Lockout/Tagout); 1926.800, Underground Construction; and 1926.650, Excavations. OSHA has determined that differences between the State and Federal standard amendments are minimal. OSHA reserves the right to reconsider approval, should substantial objections be submitted to the Assistant Secretary. This decision is effective 10/9/91.