The only time I recall anything ever being brought into the facility was when I worked at Auburn in the early 80's. They had one large mess hall, with an enclosed gas booth set on the back wall, close to the ceiling. For breakfast, lunch and supper meals, while the facility was shut down for the count, and all inmates were in their cells, the officer who was assigned to cover the gas booth during the meals, would receive containers of gas that they would have to carry through the facility yard, and into the locked gas booth, and remain there throughout the meal. There was a special gas dispenser system installed in the booth, so the officer was there just in case there was ever a problem in the mess hall, and he could respond. However, at the time, I believe it was only a Captain or above who could authorize the use of gas. Once the mess hall was closed, and the inmates were all back in their cells, the officer would return the cans of gas back to the arsenal.
What gas?