(1) Upon receipt of an application or other notice to construct, maintain, modify or abandon an injection well, the director shall give public notice as required by the rules and regulations promulgated under authority of this chapter.
(2)  The director shall examine each application and shall make an investigation to determine what effect the use of the proposed or existing injection well will have or is having upon the rights of others to use water for beneficial purposes. For purposes of such investigation, the director may conduct a fact finding or investigative hearing. He may apply to the district court of the county in which the well is located for subpoenas requiring the appearance of witnesses and production of books, records, and papers; or he may administer oaths, and take testimony at any place and time. Employees and agents of the department of water resources may make reasonable entry upon any lands in the state for purposes of making investigations and surveys, or for other purposes necessary to carry out the intent of this chapter.