(AP) — About 450 gallons of hazardous wastewater leaked from a tank at a Colorado plant where chemical weapons are being destroyed, the Army said Friday. The wastewater was confined to a containment area and cleaned up, site project manager Gregory Mohrman said in a written statement. The wastewater was primarily salty water called hydrolysate, produced when mustard agent is neutralized with hot water and a caustic chemical, said Sandy Romero, a spokeswoman for Bechtel Corp., the lead contractor on the project. Mustard agent can maim or kill by blistering skin, scarring eyes and inflaming airways.