Subjgrp 157. Radiation—Underground Only

• § 57.5037 - Radon daughter exposure monitoring.
• § 57.5038 - Annual exposure limits.
• § 57.5039 - Maximum permissible concentration.
• § 57.5040 - Exposure records.
• § 57.5041 - Smoking prohibition.
• § 57.5042 - Revised exposure levels.
• § 57.5044 - Respirators.
• § 57.5045 - Posting of inactive workings.
• § 57.5046 - Protection against radon gas.
• § 57.5047 - Gamma radiation surveys.