The decisions made in the first thirty minutes of an ammonia release determine whether it stays a maintenance issue or becomes an incident.
People first
Evacuate upwind and uphill. Ammonia vapor is lighter than air when pure but forms a dense, low-lying cloud when it picks up moisture, which it does readily in a humid engine room. Assume it will hug the floor.
Account for everyone at the muster point before anyone considers re-entry. Only trained responders in appropriate respiratory protection go back in.
Isolate if it is safe
If a trained operator can reach a valve or emergency shut-off from a safe position, isolating the leaking section dramatically limits the release. If reaching it means entering an unmonitored, high-concentration atmosphere, it waits for responders with SCBA.
Notify
California facilities have reporting obligations for ammonia releases above threshold quantities, including notification to the local emergency response agency and the state warning center. Make the calls early. Nobody has ever been penalized for reporting a release that turned out to be small.
Then call for recovery
Once the immediate hazard is controlled, the remaining charge usually has to come out before repairs can begin. That is the point to call an emergency pump out crew. Our team is available 24/7 at 559-308-8479 and mobilizes anywhere in California.