N.H. Rev. Stat. Ann. § 146-C:13

Any person who is found to be strictly liable for a discharge or spillage of oil, and who willfully fails to comply with a department order requiring investigation, containment, cleanup, removal, remedial measures, or corrective measures, shall be liable to the state in double the amount of cost recoverable funds expended by the state in undertaking investigative, remedial, or corrective action at the site.