Wash. Admin. Code § 296-849-11065
(2) You must make sure observers who enter areas with benzene exposure:
(a) Are provided with and use the same protective clothing, respirators, and other personal protective equipment (PPE) that employees working in the area are required to use;
AND
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 18-22-116, § 296-849-11065, filed 11/6/18, effective 12/7/18; WSR 05-01-172, § 296-849-11065, filed 12/21/04, effective 3/1/05.]