Respondent owns and operates a carbonated beverage bottling plant. At the facility, respondent produces, processes, handles, or stores substances listed in, or pursuant to, CAA 112(r)(3) or other extremely hazardous substances identified as such due to toxicity, reactivity, flammability, volatility. or corrosivity, including anhydrous ammonia. On March 29, 2015, there was a 3,750 pound release of anhydrous ammonia from the facility due to a closed compressor discharge valve and a failed high pressure compressor shutdown interlock.