This act does not limit the right of an excavator, facility owner, or facility operator to seek legal relief and recovery of actual damages incurred and equitable relief in a civil action arising out of a violation of the requirements of this act, or to enforce the provisions of this act, nor shall this act determine the level of damages or injunctive relief in any such civil action. This section does not affect or limit the availability of any contractual or legal remedy that may be available to an excavator, facility owner, or facility operator arising under any contract to which they may be a party.