Columbia Spas in Jefferson, a company that makes spas, was destroyed in a four-alarm fire Thursday morning.  Tammy Robbins, with Jefferson Fire, says the building was fully involved when the fire crews arrived.  The 25,000 square foot building is a total loss.  No one was hurt.  Fire crews from seven agencies were called to battle the flames.  No employees of the business were inside at the time.  Fire investigators will determine the cause.