Federal safety officials proposed fines totaling $704,000 against three contractors recently over lead safety issues. The U.S. Occupational Safety and Health Administration on April 10 proposed a $323,000 fine against Leo J. Roth Corp., Webster, N.Y., for allegedly failing to protect workers from lead exposure hazards during replacement of a copper roof at the State University of New York-Geneseo. Company officials could not be reached for comment. Last month, OSHA proposed fines against two contractors working at a battery plant in Michigan. One of the Michigan contractors says it will appeal the fine.