30 CFR § 60.10 - Permissible exposure limit (PEL).

---
identifier: "/us/cfr/t30/s60.10"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 60.10 - Permissible exposure limit (PEL)."
title_number: 30
title_name: "Mineral Resources"
section_number: "60.10"
section_name: "Permissible exposure limit (PEL)."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "M"
subchapter_name: "UNIFORM MINE HEALTH REGULATIONS"
part_number: "60"
part_name: "RESPIRABLE CRYSTALLINE SILICA"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 811, 813(h) and 957."
regulatory_source: "89 FR 28470, Apr. 18, 2024, unless otherwise noted."
cfr_part: "60"
---


# 60.10 Permissible exposure limit (PEL).

The mine operator shall ensure that no miner is exposed to an airborne concentration of respirable crystalline silica in excess of 50 µg/m
<sup>3</sup> for a full-shift exposure, calculated as an 8-hour TWA.