Saw this this morning:
Ammonia leak evacuates Flying Dog Brewery
WASHINGTON - Hazardous materials crews are on the scene in Frederick, Md. responding to an ammonia leak at the Flying Dog Brewery.
The brewery is on the 4600 block of Wedgewood Boulevard.
Frederick County Fire and Rescue evacuated the building after receiving the call at 2:02 a.m. Thursday.
The building will be ventilated and is expected to reopen later on Thursday.