We finally have an exact date for the official opening of the $4 million Union Station Bike Transit Center: October 2 will mark the grand opening for the long-awaited (and somewhat delayed) facility, a spokesperson for Mobis/Bikestation confirmed today. The Bike Transit Center, paid for by the U.S. Department of Transportation and DDOT, will offer secure bike parking, a changing room, lockers, bike rentals, repairs and a small retail shop selling bike accessories, for…