[Statutory Authority: Washington Clean Air Act, RCW
70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-070, filed 5/20/09, effective 6/20/09. Statutory Authority: RCW
70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-070, filed 6/18/91, effective 9/18/91.]