Workmen subjected to temperature extremes, radiant heat, humidity, or air velocity combinations which, over a period of time, are likely to produce physiological responses which are harmful must be afforded protection by use of adequate controls, methods or procedures, or protective clothing. This must not be construed to apply to normal occupations under atmospheric conditions which may be expected in the area except that special provisions which are required by other regulations for certain areas or occupations must prevail.
Wash. Admin. Code § 296-62-09013
Order 73-3, § 296-62-09013, filed 5/7/73.