30 CFR 70.100
§ 70.100 Respirable dust standards.
United States · 30 CFR — Mineral Resources · Status: effective
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- Citation
- 30 CFR 70.100, § 70.100 Respirable dust standards, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/133345
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Full text
(a) Each operator shall continuously maintain the average concentration of respirable dust in the mine atmosphere during each shift to which each miner in the active workings of each mine is exposed, as measured with an approved sampling device and expressed in terms of an equivalent concentration, at or below:
(1) 2.0 milligrams of respirable dust per cubic meter of air (mg/m 3).
(2) 1.5 mg/m 3 as of August 1, 2016.
(b) Each operator shall continuously maintain the average concentration of respirable dust within 200 feet outby the working faces of each section in the intake airways as measured with an approved sampling device and expressed in terms of an equivalent concentration at or below:
(1) 1.0 mg/m 3.
(2) 0.5 mg/m 3 as of August 1, 2016.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.