In July 2019 during a unit start up, the rubber seal on the ethane coalescer failed, resulting in an unignited release of ethane to the atmosphere. The direct causes leading to the accidental release include rubber seal failure due to improper installation and integrity testing with service fluid (ethane) rather than inert fluid (nitrogen). Respondent failed to properly install the rubber seal per manufacturer?s installation procedures, a violation of 40 CFR 68.69(a), Operating Procedures.