PDFWAC 173-160-361
Who may supervise the use of explosives?
Explosives used for developing or reconditioning any water well must be used under the direct supervision of an individual licensed under chapter 70.74 RCW.
[Statutory Authority: Chapter 18.104 RCW and RCW 43.21A.080. WSR 98-08-032 (Order 97-08), ยง 173-160-361, filed 3/23/98, effective 4/23/98.]