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Notice is hereby given that the Doe Run Company, 7733 Forsyth
Boulevard, Clayton, Missouri 63105, has made an application for a
permanent variance from the provision in the lead standard [29 CFR
1910. 1025(f)(2), Table II] limiting the use of half-mask,
air-purifying respirators equipped with high efficiency filters, to
areas where the lead concentration in air is not in excess of 500
micrograms per cubic meter of air. The applicant has requested that
it be authorized, under specified conditions, to permit employees to
wear such respirators where they are exposed to lead at
concentrations in excess of that limitation.