Their petition seeks an expanded definition of "affected employee" and clarification that an employee may designate any person as his or her representative.
The union represents workers at 65 U.S. refineries that produce about 64 percent of the nation's oil.
The accident occurred at an auto parts manufacturer in Pell City, Alabama.
It was the second explosion in four months at the plant, according to OSHA.
An OSHA inspection led to more than a dozen serious violations against Xpedited Services LLC.
The 239 passengers and crew on board have been declared dead, but the recovery operation continues.
Caldwell-based Superior Steel Products Inc. did not protect employees from hazards related to the use of forklifts, and OSHA investigators also discovered confined space, flammable liquid, and respiratory hazards, according to an agency news release.
The blast killed a temporary worker and critically injured another.
The two agreements apply to construction workers in San Antonio and to workplaces nationwide.
The National Safety Council cited his research on human factors and programs to reduce impaired driving casualties.
OSHA has cited Lone Star Management following the accident.
ARCO National Construction also received citations for serious hazards.
OSHA has cited Reybold Homes Inc. for willfully violating safety laws.
It seeks applicants with emergency management, emergency response, and cybersecurity expertise. Appointments are for three-year terms to end Aug. 15, 2018.
Secretary Anthony Foxx announced the agency is adding two automatic emergency braking systems to the recommended advanced safety features included under its New Car Assessment Program.
Transportation Secretary Anthony Foxx found that these proposed operations did not need an FAA-issued certificate of airworthiness because they don't pose a threat to national airspace users or national security.
The recent guidance aims to help address specific risks or concerns about nanomaterials present in the workplace.