Black powder, including black powder manufactured for muzzle loading firearms, cannot be used for blasting.
Wash. Admin. Code § 296-52-67020
Statutory Authority: RCW 49.17.010, [49.17].040, and[49.17].050 . 02-03-125, § 296-52-67020, filed 1/23/02, effective 3/1/02.