Any person found guilty of willfully violating any of the provisions of this chapter, or any final written orders or directive of the lead agency or a court in pursuance thereof, is guilty of a gross misdemeanor, and upon conviction thereof shall be punished by a fine of up to ten thousand dollars and costs of prosecution, or by imprisonment in the county jail for up to three hundred sixty-four days, or both, in the discretion of the court. Each day upon which a willful violation of the provisions of this chapter occurs may be deemed a separate and additional violation.