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DOL/MSHA | RIN: 1219-AB36 | Publication ID: Fall 2003 |
Title: ●Respirable Crystalline Silica Standard | |
Abstract: Current standards limit exposures to quartz (crystalline silica) in respirable dust. The coal mining industry standard is based on the formula 10mg/m3 divided by the percentage of quartz where the quartz percent is 5.0 percent or greater calculated as an MRE equivalent concentration. The metal and nonmetal mining industry standard is based on the 1973 American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values formula: 10 mg/m3 divided by the percentage of quartz plus 2. Overexposure to crystalline silica can result in some miners developing silicosis which may ultimately be fatal. Both formulas are designed to maintain exposures to 0.1 mg/m3 (100 ug) of silica. The Secretary of Labor's Advisory Committee on the Elimination of Pneumoconiosis Among Coal Mine Workers made several recommendations related to reducing exposure to silica. NIOSH and ACGIH recommend a 50ug/ m3 exposure limit for respirable crystalline silica. MSHA is considering several options to reduce miners' exposure to crystalline silica. | |
Agency: Department of Labor(DOL) | Priority: Other Significant |
RIN Status: First time published in the Unified Agenda | Agenda Stage of Rulemaking: Prerule Stage |
Major: Undetermined | Unfunded Mandates: No |
CFR Citation: 30 CFR 70 30 CFR 71 30 CFR 90 30 CFR 72 30 CFR 58 ... (To search for a specific CFR, visit the Code of Federal Regulations.) | |
Legal Authority: 30 USC 811 30 USC 813 |
Legal Deadline:
None |
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Timetable:
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Regulatory Flexibility Analysis Required: Undetermined | Government Levels Affected: None |
Federalism: No | |
Energy Effects: Statement of Energy Effects planned as required by Executive Order 13211. | Included in the Regulatory Plan: No |
Agency Contact: Marvin W. Nichols Jr. Director, Office of Standards Department of Labor Mine Safety and Health Administration Room 2352, 1100 Wilson Boulevard, Room 2350, Arlington, VA 22209 Phone:202 693-9440 Fax:202 693-9441 Email: nichols-marvin@dol.gov |