Wash. Admin. Code § 296-817-50010
You must make sure staff conducting hearing protection audits:
(1) Can demonstrate competence in:
(2) Are certified by the Council for Accreditation in Occupational Hearing Conservation (CAOHC) or have training in the following areas:
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-817-50010, filed 11/17/15, effective 12/18/15. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 03-11-060, § 296-817-50010, filed 5/19/03, effective 8/1/03.]