30 C.F.R. § 57.5039
Maximum permissible concentration
Except as provided by standard § 57.5005, persons shall not be exposed to air containing concentrations of radon daughters exceeding 1.0 WL in active workings.
Already have an account? Sign in instead.
You stay signed in for 30 days on this browser.
Continue with Google Continue with MicrosoftNo account yet? Create a free one.
We sent a six-digit code.
It expires in ten minutes, works once, and only in this browser. Five wrong tries void it. Send another code.
Your account is live and the Cloudflare checks are off for this browser.
Except as provided by standard § 57.5005, persons shall not be exposed to air containing concentrations of radon daughters exceeding 1.0 WL in active workings.