That just sounds like it's a knee jerk reaction from regulators. For decades their reaction to pollution was "yeah just dump it in the ocean", then we figured out it was bad. So now the pendulum swung the other way where we can't dump anything in the ocean, even if it's probably benign, because if it turns out to be not benign, it'll super bad on you. "You did what? Approved dumping pollutants in the ocean? Haven't you learned anything from us dumping radioactive super-mustard gas in the oceans decades ago?" Better to play it safe. After all, you're not picking up the tab.