The 2005 contract removed the temperature standards from the contract. Even though it is no longer in the contract the Agency still is bound by the general duty clause to provide a safe and healthy workplace.
According to Debbie Frederickson, one of the contract negotiators:
During the contract bargaining, management informed us that we would have the ASHRAE standards to go by now.
IN the ASHRAE standard for Thermal Environmental Conditions for Human Occupancy, Table 3 and Section 5.1.5.1ff states that the optimum indoor temperature in summer is 75 degrees and the optimum temperature range is 73--79 degrees. The minimal standard is 79 -- 84 degrees.
OSHA does not have a standard for indoor air temperature, so generally they won't be much help.
The section of OSHA regulations covering IAQ is 1910.1000
OSHA has interpreted this to mean:
As a general rule, office temperature and humidity are matters of human comfort. OSHA has no regulations specifically addressing temperature and humidity in an office setting. However, Section III, Chapter 2, Subsection V of the OSHA Technical Manual, "Recommendations for the Employer," provides engineering and administrative guidance to prevent or alleviate indoor air quality problems. Air treatment is defined under the engineering recommendations as, "the removal of air contaminants and/or the control of room temperature and humidity." OSHA recommends temperature control in the range of 68-76° F and humidity control in the range of 20%-60%.
As you know, hazards for which OSHA does not have a specific standard are governed by Section 5(a)(1) of the Occupational Safety and Health Act (the Act; General Duty Clause) which requires that employers provide employment and a place of employment that are free from recognized hazards that are causing or are likely to cause death or serious physical harm. [remainder of paragraph omitted]
Office temperature and humidity conditions are generally a matter of human
comfort rather than hazards that could cause death or serious physical harm.
OSHA cannot cite the General Duty Clause for personal discomfort.
(full citation here)
Where to file an OSHA complaint
How to file an OSHA complaint (doc) (html)