Moreover, review of approximately one dozen related worker health and safety code sections revealed no standards or regulations of the Departments of Labor (including OSHA) or the General Services Administration that specify comfortable, let alone safe, work-place temperature ranges or maximum or minimum temperatures considered safe for 8-hour (TWA--time-weighted average) or instantaneous exposures. This may be enough to know. However, there are numerous generalized references in the Code of Federal Regulations to dangers from cold to be avoided in work places, and many of those are cited here.
It is interesting to note that dangers from cold are not mentioned in the only reference to the Cold Storage Industry found (29 CFR 779.300-779.388), which speaks only to retail outlets' exemption from overtime wage payments.
As much in numerical order as the citations can be usefully put, the federal regulations that do pertain to occupational cold injury and its prevention are the following (none of which, it will be noted, is a standard as such):
In general Occupational and Health Standards, under Foot Protection (29 CFR 1910.136, p. 426), the regulations do not mention harmful temperature extremes, but they do direct "each affected employee" to select footwear on the basis of "danger of foot injuries due to falling or rolling objects, or objects piercing the sole, and where such employee's feet are exposed to electrical hazards."