Knowing violations

Any person who: (1) Knowingly violates this chapter or any rule adopted by the department pursuant to this chapter, or any condition in a permit issued under this chapter or any requirement imposed in a pretreatment program; or (2) Knowingly introduces into a sewerage system or into a publicly owned treatment works any water pollutant or hazardous substance which such person knew or reasonably should have known could cause personal injury or property damage or, other than in compliance with all applicable federal, state, or local requirements or permits, which causes such treatment works to violate any effluent limitation or condition in a permit issued to the treatment works under this chapter; shall be punished by a fine of not less than $5,000 nor more than $50,000 per day of violation, or by imprisonment for not more than three years, or by both. If a conviction of a person is for a violation committed after a first conviction of such person under this section, punishment shall be by a fine of not more than $100,000 per day of violation, or by imprisonment of not more than six years, or by both.