For the purpose of protecting and preserving the groundwater supplies within the district for beneficial uses, a district may take any action, within the district, including, but not limited to, capital expenditures and legal actions, which in the discretion of the board is necessary or desirable to accomplish any of the following:
(a) Prevent contaminants from entering the groundwater supplies of the district, whether or not the threat is immediate.
(b) Remove contaminants from the groundwater supplies of the district.
(c) Determine the existence, extent, and location of contaminants in, or which may enter, the groundwater supplies of the district.
(d) Determine persons, whether natural persons or public entities, responsible for those contaminants.
(e) Perform or obtain engineering, hydrologic, and scientific studies for any of the foregoing purposes.