Washington University in St. Louis:

Washington University's North Campus and West Campus principally house administrative functions that are not student focused. North Campus lies in St. Louis City near the Delmar Loop. The University acquired the building and adjacent property in 2004, formerly home to the Angelica Uniform Factory. Several University administrative departments are located at the North Campus location, including offices for Quadrangle Housing, Accounting and Treasury Services, Parking and Transportation Services, Army ROTC, and Network Technology Services. The North Campus location also provides off-site storage space for the Performing Arts Department. Renovations are still ongoing; recent additions to the North Campus space include a small eatery operated by Bon Appetit Management Company, the University's on-campus food provider, completed during spring semester 2007, as well as the Family Learning Center, operated by Bright Horizons and opened in September 2010.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". For what department does the north campus location of Washington University provide off-site storage?
Performing Arts Department