It sounds like kind of an emergency situation, where concurrent breakdowns of infrastructure led to an existing sewage station being overwhelmed. The sewage had to be hauled away, and the argument is over whether dumping it in the ocean was reasonable or whether it was viable to haul it to another sewage station.
But whatever the outcome, it doesn’t sound like it’s something that one would expect to occur on a regular basis. That is, it’s not like, say, a combined sewer that intrinsically needs to dump untreated sewage into waterways when it’s particularly rainy (or, rather, I don’t know whether this particular sewer was a combined sewer, but the specific problem that led to the trucks dumping sewage relied upon breakdowns).