25. The department shall not audit a response action outcome more than three years after the date the licensed site remediation professional filed the response action outcome with the department, unless:
a. undiscovered contamination is found on a site for which a response action outcome has been filed;
b. the board conducts an investigation of the licensed site remediation professional; or
c. the licensed site remediation professional who issued the response action outcome has had his license suspended or revoked by the board.