when i was doing my apprenticeship at the cold store it was all ammonia cant remember the tonnage but it was massive, and when i say cold store i mean warehouse freezer !!!
but i remember quite Afton on the old sterne compressor carbon gland seal would crack and ammonia pour out causing the whole industrial estate staff to cry finding the fire brigade spraying water into the air to absorb the ammonia ,
after a while you do get used to it i would often walk into the plant room with someone to find them bolting out the door "crying"
when taking oil out the system the ammonia would "roll" out the bucket and cause an eerie mist across the floor .oh memories