By Nick Scala and Hema Steele
On April 16, 2024, the Mine Safety & Health Administration (“MSHA”) released its final rule for Respirable Crystalline Silica (“RCS”) for preliminary viewing, and it was published in the Federal Register on April 18, 2024. While an update to MSHA’s silica regulations has been in the works for most of the 21st century, getting from this proposed rule to the final form moved very quickly from a rulemaking perspective. With the rule, MSHA seeks to protect mine workers from occupational exposure to RCS, including quartz, cristobalite, and/or tridymite.
The rule imposes stringent new requirements on operators, including a reduced Permissible Exposure Limit of 50 µg/m³, mandatory sampling, regular written evaluations of operations (even when there are no changes to the process, equipment, or mined mineral), the adoption of respiratory protection programs, and medical surveillance programs for Metal/Nonmetal mines.
The rule will become effective on June 17, 2024. MSHA had originally proposed that mine operators begin compliance 120 days after the rule’s effective date, but to balance miners’ safety and health with mine operators’ preparations in implementing the new requirements, MSHA has set the following new deadlines by which mine operators must comply:
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- Coal mine operators: April 14, 2025
- Metal/Nonmetal operators: April 8, 2026
The extended compliance period will allow operators to learn the new regulation’s subparts, evaluate its application to their mine(s), develop the necessary programs, and acquire sampling materials or coordinate with third parties to conduct sampling. The roughly two-year compliance period for MNM matches the General Industry compliance grace period from when OSHA finalized its updated silica regulation in 2016. MSHA granted more time to MNM mine operators citing that MNM mines do not have the same robust existing sampling requirements as have been in place in the Coal industry for years, and additional time would be needed or the MNM operations to develop and implement compliant programs, while also giving sampling and medical surveillance infrastructure time to expand for the new demands. .
Here are some key takeaways from the proposed rule: Continue reading