Columbia, Mo.-MFA Inc. will pay a $100,000 fine after pleading guilty to one misdemeanor violation of the Clean Air Act in connection with a spill of anhydrous ammonia fertilizer. In addition to the fine, MFA agreed to make “significant safety upgrades” to its facilities, which will cost “hundreds of thousands of dollars.” The accident occurred during the process of transferring anhydrous ammonia from a bulk tank to a nurse tank when a connection between the loading valve and the fill valve on the nurse tank became separated, severely burning employees.