Wash. Admin. Code § 296-150M-0715
Yes, based on RCW 43.22.434 the department may audit the records of contractors as defined in chapter 18.27, 18.106, or 19.28 RCW when the department has reason to believe that a violation of the permitting requirements has occurred.
[Statutory Authority: RCW 43.22.340, 43.22.400, 43.22.432, 43.22.433, 43.22.434, 43.22.480, and 43.22.485, 2002 c 268, and chapter 43.22 RCW. WSR 03-12-044, § 296-150M-0715, filed 5/30/03, effective 5/30/03.]