The exemption from liability provided by this Part does not apply to:
(1) A person who aggravates or contributes to a discharge or disposal or threatened discharge or disposal that was not remedied under an approved voluntary remedial action plan.
(2) A person who was a responsible person under Part I of this Chapter for a discharge or disposal or threatened discharge or disposal identified in the approved voluntary remedial action plan before taking an action that would have made the person subject to the exemptions under R.S. 30:2288 or R.S. 30:2288.1.
(3) A person who obtains approval of a voluntary remedial action plan for purposes of this Part by fraud or misrepresentation, or by knowingly failing to disclose material information, or who knows that approval was so obtained before taking an action that would have made the person subject to the exemptions from liability under R.S. 30:2288 or R.S. 30:2288.1.