After receipt of a request, the Department shall provide the person with an opportunity for a formal hearing after giving a notice of not less than 5 days. The hearing shall be conducted by the Director or anyone designated by him or her for that purpose and shall be located and conducted in accordance with the rules adopted by the Department. Failure of the person or permittee to timely request a hearing or, if a civil penalty has been assessed, to timely tender the assessed civil penalty shall constitute a waiver of all legal rights to contest the notice of probable violation, including the amount of any civil penalty. Within 30 days after the close of the hearing record or expiration of the time to request a hearing, the Department shall issue a final administrative order.
415 ILCS 160/35