All hearings which are held for the suspension, modification or revocation of license, permit or certification shall be conducted by the Secretary. The licensee, permit holder or certified applicator shall have the right to appear personally, and to be represented by counsel, and to produce evidence and witnesses in his own behalf. The Department shall preserve a full record of the proceeding. A transcript of the record may be purchased by any person interested in such hearing on payment to the Department the cost of preparing such transcript. The Department shall notify the licensee, permit holder or certified applicator of its decision in writing within 30 days after the conclusion of the hearing.