A possible ammonia Leak at The Annex Bldg of the Coliseum complex Required the work of Winston Salem"s HAZMAT TEAM. 1st alarm assignment consited of E-01,E-09, A-03 and C-03. 1st arriving E-01 identified and confirmed from workers on scene of an Ammonia Leak from a machine that makes ice for the local Hockey Team. E-01 Notified IC and denied entry and requested HAZMAT 1 and E-12(WS's backup team) Crews donned appropriate equip. and controlled leak. Lengthy operation but very successful. Crews did another great job. Call volume this date was extremly high .