20 Durham St Portsmouth, NH 03801-2873

Use AIR AI PI ABC Supplemental Regulations A. Airport-Related Uses A1 Military aviation (activities associated with the US Department of Defense, NH National Guard, or other State or Federal defense related activities) and related airport activities P P P P A2 Medical emergency flights, provided that any arrivals or departures between 11:00 PM and 6:00 AM shall be limited to locations designated for emergency use during such hours P P N P A3 Civil aviation, with no arrivals or departures permitted between 11:00 PM and 6:00 AM: A3.1 Commercial cargo/freight air transportation for Stage III aircraft and aircraft with a gross weight of less than 75,000 pounds P P N N A3.2 General Aviation (all aviation activity except commercial passenger service and the military) P P N N A3.3 Limited commercial passenger service for no more than 30 passengers per flight P P N N A3.4 Air charter service for no more than 30 passengers per flight P P N N A4 O peration and maintenance activities associated with the airport runway and apron P P N N P = Permitted S = Special Exception CU = Conditional Use Permit N = Prohibited As Amended Through April 6, 2026 4-28 Use AIR AI PI ABC Supplemental Regulations A5 Aircraft servicing, maintenance and retrofitting A5.1 Operations that require direct access to the aircraft, including aircraft fueling P P N N A5.2 Operations that do not require direct access to the aircraft, including but not limited to servicing and maintenance of avionics, flight recorders, tires, brakes, sheet metal, batteries and other aircraft components P P P N A6 Maintenance, replacement and operation of underground fuel storage and distribution systems that were in existence prior to January 1, 1989, provided the following requirements are satisfied: P P N N (a) To protect the underlying aquifer, no additional fuel storage or distribution systems shall be placed underground; (b) Periodic inspections of not less than every six months shall be conducted by the responsible authority and the results shall be reported to appropriate Federal, State and Local authorities; and (c) Operation shall conform to all applicable federal, state and local statutes, ordinances, regulations and procedures. A7 Above-ground fuel storage tank facility, provided that: (a) Storage tanks shall be either double lined or vaulted; (b) Storage tanks shall be diked with an impervious retention basin capable of containing 1.3 times the holding capacity of the tanks; and (c) All applicable federal, state and local statutes, ordinances and regulations shall be complied with.