Ariz. Admin. Code § 11-1-1823
Current through Register Vol. 30, No. 50, December 13, 2024
At least once each week, a qualified person shall measure the volume of air entering the main intakes and leaving the main returns, the volume of the intake and return of each split, and the volume through the last open crosscuts or other ventilation openings nearest the active faces. Records of such measurements shall be kept in a book on the surface.
Ariz. Admin. Code § R11-1-1823