Respondent’s facility is a poultry processing facility and uses 145,000 pounds of ammonia (anhydrous) as part of its covered process. On March 26, 2016, at approximately 8:05.p.m., the refrigeration staff received an odor complaint. Upon inspection, they discovered a pressure release valve (PRV) released prematurely on the marination tanks located on the roof. The staff proceeded to close off the liquid ammonia feed to the tanks by using the liquid feed isolation valve and switched the feed to another PRV using a three-way valve, thereby ending the release at approximately 8:35 P.M. It was determined that the failed PRV that resulted in the release was previously recalled by the manufacturer on June 21, 2013. Respondent received replacements for all of the recalled PRVs by July 1, 2014. Respondent failed to replace the recalled valve that failed on March 26, 2016.