The U.S. Department of Labor's Occupational Safety and Health Administration describes the 32 citations for Schwan's Global Supply Chain Inc. as "serious safety and health violations."
Officials said two other companies providing maintenance and staffing services for Schwan's were cited for 18 safety and health violations.
OSHA inspectors say the employers failed to provide adequate training for employees to work safely with ammonia.
The agency said other citations involved machines and protective equipment it deemed unsafe; training issues; blocked and mismarked exits in hazardous areas; and other hazards.
The Marshall, Minn.-based company manufactures frozen foods sold under several brand names.
In Atlanta, nearly 500 workers produce dough, cookies and pie crusts.
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