July 6, the Coast Guard received a report from Dutch Harbor that there was an ammonia leak on board Seattle-based 353-foot pollock processor F/V EXCELLENCE. According to reports, EXCELLENCE had 20,500 pounds total of ammonia on board; this leak is believed to be from a 5,000 pound tank. It’s not known how much ammonia has escaped. At the time of that report, while EXCELLENCE was still moored at a cold storage dock, the Unalaska Fire Department marked out a 500-foot safety zone and tried to reduce the escaping ammonia vapors by spraying EXCELLENCE with water.
All 129 crewmembers were evacuated, three of whom required medical attention for ammonia inhalation. Two were transferred to Anchorage for further care.