When we're looking at containment facilities, one of the most important things is how the effluent cleaning process is designed.
We have a terrific example of a good way to do that in the Kuterra closed-containment facility built by Namgis First Nation on Vancouver Island. In that case, there is no possibility of any release to the wild because of the number of screenings that the effluent goes through, followed by settling in a pond—essentially a reverse well—so that before any liquid effluent ever reaches a natural water body, it has already been cleaned three different ways.
The location of the facility is also critically important, particularly as was observed in the context of rising sea levels and increasing storm surge. You need to be sure that the facility is going to be impervious to storm events that could damage it and cause an unscheduled release of the living organisms.