Industrial waste water permits are not less restrictive than domestic waste water. They could not have "filled in the wrong form" because they need a domestic waste water permit as well.
Someone filled out the wrong form.
Stop the whole thing. Abandon the cosmos. Just stay here.
Some bureaucrats weren’t satisfied.
I regularly face this issue in IT circles, where I'm supposed to have a time machine to compensate for the multi-month forewarning everyone else needs.