Trainees and inexperienced personnel must work under the direct supervision of a fully qualified licensed blaster who knows the site's:
Wash. Admin. Code § 296-52-67050
Statutory Authority: RCW 49.17.010, [49.17].040, and[49.17].050 . 02-03-125, § 296-52-67050, filed 1/23/02, effective 3/1/02.