(7) DEFENSES TO LIABILITY.--In any proceeding determining claims of the fund or any other claims by the state pursuant to ss.
376.011-
376.21, it shall not be necessary for the department to plead or prove negligence in any form or manner. The department need only plead and prove that the prohibited discharge or other polluting condition occurred. The only defenses of a person alleged to be responsible for the discharge to an action or proceeding for damages or cleanup costs shall be to plead and prove that the occurrence was solely the result of any of the following or any combination of the following:
(b) An act of government, either federal, state, county, or municipal.
(c) An act of God, which means only an unforeseeable act exclusively occasioned by the violence of nature without the interference of any human agency.
(d) An act or omission of a third party other than an employee or agent of the responsible party or a third party whose act or omission occurs in connection with any contractual relationship with the responsible party, except where the sole contractual arrangement arises in connection with carriage by rail,
provided that, to establish entitlement to any of the foregoing defenses, the responsible party shall plead and prove that the responsible party exercised due care with respect to the pollutant concerned, taking into consideration the characteristics of the pollutant and in light of all relevant facts and circumstances, and took precautions against foreseeable acts or omissions of others and the foreseeable consequences of those acts or omissions.