Wash. Admin. Code § 173-441-100
All requests, notifications, and communications to ecology pursuant to this chapter, must be submitted in a format as specified by ecology to either of the following:
[Statutory Authority: RCW 70A.15.2200. WSR 22-05-050 (Order 21-07), § 173-441-100, filed 2/9/22, effective 3/12/22. Statutory Authority: Chapters 70.235 and 70.94 RCW. WSR 15-04-051 (Order 13-13), § 173-441-100, filed 1/29/15, effective 3/1/15. Statutory Authority: 2010 c 146, and chapters 70.235 and 70.94 RCW. WSR 10-24-108 (Order 10-08), § 173-441-100, filed 12/1/10, effective 1/1/11.]