Editing Permissible exposure limit (section)

===MSHA===
Like OSHA, [[Mine Safety and Health Administration]] (MSHA) also uses the same 5 decibel exchange rate and 90 dBA for an 8-hour TWA for their PEL. Once a miner's noise exposure exceeds the PEL, feasible engineering AND administrative controls must be in place to try to limit the noise exposure of the employees. If a mine operator uses administrative controls, procedures for such controls must be posted on the bulletin board and a copy must be supplied to all affected employees.<ref>{{cite web |title=62.130 Permissible Exposure Limit |url=https://www.ecfr.gov/cgi-bin/text-idx?SID=28741a401b0e74a8d116a4d905dd89b6&mc=true&node=pt30.1.62&rgn=div5#se30.1.62_1130 |website=Government Publishing Office |access-date=20 November 2018}}</ref>