In addition to the operation and maintenance walkthrough inspection requirements in COMAR 26.10.04.03, an owner and an operator of an airport hydrant system shall inspect the following additional areas of the airport hydrant system: Inspect hydrant pits by: Visually checking for any damage; Removing any liquid or debris; and Checking for evidence of a spill, release or discharge; and Inspect hydrant piping vaults and sumps by checking for evidence of a spill, release or discharge from hydrant piping. An owner and an operator of an airport hydrant system shall inspect the additional areas required in §A of this regulation: Monthly if confined space entry according to the Occupational Safety and Health Administration is not required; or At least annually if confined space entry according to the Occupational Safety and Health Administration is required. An owner and an operator of an airport hydrant system shall maintain records of the additional areas inspected in accordance with COMAR 26.10.04.03.