National Institute for Occupational Safety and Health; Occupational Exposure to Inorganic Lead: Request for Comments and Information; Republication

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NIOSH is reviewing its recommendations contained in the document Criteria for a Recommended Standard....Occupational Exposure to Inorganic Lead, Revised Criteria--1978 [NIOSH 1978]. The evaluation of recent literature indicates that the NIOSH recommended exposure limit (REL) of 100 g/m 3 as an 8-hour time-weighted average (TWA) in that document does not sufficiently protect workers from the adverse effects of exposure to inorganic lead. NIOSH is requesting comments and information relevant to the evaluation of the potential health risks associated with occupational exposure to inorganic lead, as well as case reports or other data that demonstrate adverse health effects in workers exposed to inorganic lead at or below the OSHA permissible exposure limit (PEL) of 50 g/ m 3 as an 8-hour TWA and any information pertinent to evaluating the technical feasibility of establishing a more protective REL for inorganic lead. NIOSH is also soliciting information on worker blood lead levels (BLLs) including data on methodologies used in measuring BLLs in the workplace and information that can be used for comparing airborne inorganic lead concentrations to observed BLLs. NIOSH intends to analyze