In this particular instance, it is the orders of the board to reimburse for costs that fall within the category of expenses incurred. The board may require the company in question to do so, and in doing so, it would take into account the “polluter pays” principle and the components that are consistent with the particular incident that may be dealt with.
In this particular case, it doesn't necessarily mean the board wouldn't need to examine what those costs and circumstances might be, but certainly the way it's constructed it in no way limits the board's ability to do so, and it would be typical and normal in legislation to see it that way.