Wash. Admin. Code § 296-52-67235

Current through Register Vol. 25-01, January 1, 2025

Section 296-52-67235 - Firing the blast

(1)Employee evacuation. The blaster must make sure all employees are out of the blast area before firing a blast.

(2)Guarding entrances. All entrances:

(a) Leading into the blasting area must be carefully guarded.

(b) To any working place where a drift, raise, or other opening is about to hole through must be carefully guarded.

(3)Warning signals. A warning must be given before firing an underground blast. See Table T-1 for signaling requirements.

TABLE T-1
WARNING SIGNAL	A 1 minute series of long blasts 5 minutes prior to blast signal.
BLAST SIGNAL	A series of short blasts 1 minute prior to the shot.
ALL CLEAR SIGNAL	A prolonged blast following the inspection of the blast.

Wash. Admin. Code § 296-52-67235

Statutory Authority: RCW 49.17.010, [49.17].040, and[49.17].050 . 02-03-125, § 296-52-67235, filed 1/23/02, effective 3/1/02.