We recently added the following documents to the Draft Airports Advisory Circulars page on the FAA website:
Draft AC 150/5210-7E, Aircraft Rescue and Fire Fighting Communications
Draft AC 150/5210-14C, Aircraft Rescue Fire Fighting Equipment, Tools and Clothing
Comments for both drafts are requested by July 19, 2019. Please visit the page to access the draft documents and read procedures for submitting comments.