Final answer:
The Air Force Petroleum Office is responsible for informing the squadron commander and other affected agencies about deficiencies in a fixed hydrant system that compromise mission accomplishment.
Step-by-step explanation:
The responsibility of informing the squadron commander, Air Force Petroleum Office, and other affected agencies of any deficiency in a fixed hydrant system that compromises mission accomplishment lies with the responsible personnel of the Air Force Petroleum Office. These deficiencies can include issues with the pipelines, pumps, storage tanks, or any other component of the fixed hydrant system.