Respondent is the owner or operator of the refrigerated warehousing and storage area. Respondent’s refrigerated distribution center includes a Program Level 3 covered process, as provided by 40 C.F.R. ยง 68.10(d). Respondent uses 74,000 pounds of ammonia (anhydrous), a regulated substance in an amount that exceeds the threshold quantity as part of its covered process at its distribution center. On March 29, 2019, at approximately 6:30 a.m. the gasket flange to Pump #1 on the Low Side Accumulator at the Distribution Center Engine Room failed causing a release of liquid anhydrous ammonia.