When setting up work zones the crews must take into account the traffic flow, the possible back up it may create and the costs involved if it's not properly set up, Gualardo noted. The ASSE has developed a free safety tip brochure on this and other safety issues. The leak was reported early Sunday morning at a fertilizer plant in the town 45 miles north of St. Louis. The 230 residents of the town were evacuated and Missouri Route 79 was closed. Deputies said illicit drug makers apparently were stealing the liquid from an agricultural supply firm when it began leaking and sent a toxic cloud over the town.
Anhydrous ammonia is one of the ingredients used to make methamphetamine.
The fumes sent five firefighters to hospitals with breathing difficulty. All five were treated and released. No arrests have been made in connection with the incident.