Any person who is found by the Secretary, after notice and opportunity for a hearing in accordance with
section 554 of title 5, to have committed an act prohibited by
section 5505 of this title shall be liable to the United States for a civil penalty. The amount of the civil penalty shall not exceed $100,000 for each violation. Each day of a continuing violation shall constitute a separate offense. The amount of such civil penalty shall be assessed by the Secretary by written notice. In determining the amount of such penalty, the Secretary shall take into account the nature, circumstances, extent, and gravity of the prohibited acts committed and, with respect to the violation, the degree of culpability, any history of prior offenses, and such other matters as justice may require.