Respondent owns and operates a controlled temperature production plant for milk and fruit juices. The Facility is located in a predominantly industrial and commercial area, across the street from the Lynn wastewater treatment plant, which also is an RMP facility. The Facility is within a quarter mile of a church, restaurants, other businesses, and freight and passenger rail lines. The Facility is within a half mile of residences and playgrounds and is less than one mile from three towns. Facility uses anhydrous ammonia in a refrigeration “process,” as defined by 40 C.F.R. § 68.3, in a series of interconnected pipes and vessels at the Facility (the “Process”).