A Starfleet installation on the planet Arkaria, where the Enterprise-D crew attended a reception in 2369 while their ship underwent a baryon sweep at the orbiting Remmler Array.
Arkaria Base is a Starfleet facility on the surface of Arkaria, a world whose orbit holds the Remmler Array, used to cleanse starships of accumulated baryon particles. It appears in the Next Generation episode Starship Mine.
The base is commanded by Calvin Hutchinson, an officer notorious for his love of small talk, who hosts a reception for Picard's senior staff while the evacuated Enterprise-D is swept. Data takes the chance to study the art of idle conversation.
The party turns into a hostage crisis when the base administrator Orton proves to be in league with thieves stealing trilithium resin from the ship. Hutchinson is shot, and the officers free themselves with a pulse from La Forge's VISOR while Picard fights the thieves aboard the ship.