On January 19, 2021, Region 1 issued an administrative compliance order (Order) to Nasoya Foods USA, LLC (Nasoya), requiring the company to correct violations of Section 112(r)(1) of the Clean Air Act (CAA) at its tofu manufacturing plant in Ayer, Massachusetts (Facility). The company uses anhydrous ammonia as a refrigerant. Region 1 discovered the Facility as part of its General Duty Clause Pilot project to improve safety at facilities with small ammonia refrigeration systems. In response to an information request letter, Nasoya sent information about potentially dangerous conditions at the Facility, which require correction. Before issuing the Order in final form, EPA provided the company with an opportunity to confer on the draft Order.