Title 30 — Mineral Lands and MiningRelease 119-73
§845 Dust standards in presence of quartz
Title 30 › Chapter CHAPTER 22— - MINE SAFETY AND HEALTH › Subchapter SUBCHAPTER II— - INTERIM MANDATORY HEALTH STANDARDS › § 845
Summary
If a mine's breathable dust has more than 5% quartz, the Secretary of Health and Human Services must set a formula to calculate the allowed respirable dust limit for that work area and must use that formula when enforcing the rules.
Full Legal Text
Title 30, §845
Mineral Lands and Mining — Source: USLM XML via OLRC
In coal mining operations where the concentration of respirable dust in the mine atmosphere of any working place contains more than 5 per centum quartz, the Secretary of Health and Human Services shall prescribe an appropriate formula for determining the applicable respirable dust standard under this subchapter for such working place and the Secretary shall apply such formula in carrying out his duties under this subchapter.
Legislative History
Notes & Related Subsidiaries
Statutory Notes and Related Subsidiaries
Change of Name
“Secretary of Health and Human Services” substituted in text for “Secretary of Health, Education, and Welfare” pursuant to section 509(b) of Pub. L. 96–88 which is classified to section 3508(b) of Title 20, Education.
Effective Date
Section operative six months after Dec. 30, 1969, except to the extent an earlier date is specifically provided for in Pub. L. 91–173, see section 509 of Pub. L. 91–173, set out as a note under section 801 of this title.
Reference
Citations & Metadata
Citation
30 U.S.C. § 845
Title 30 — Mineral Lands and Mining
Last Updated
Apr 6, 2026
Release point: 119-73