Ill. Admin. Code tit. 62, § 245.220
b) All applicants for a permit under this Part, and persons requesting permit transfers, shall provide a bond at the time of filing an application for permit pursuant to Section 245.210 or at the time of filing a request for transfer of permit pursuant to Section 245.340. The bond shall be in the amount of $50,000 per permit or a blanket bond of $500,000 for all permits. (Section 1-65(a) of the Act) All bonds must meet the following requirements during the permit application process and through the entire term of an issued permit until the bond is released as provided by subsection (d):
2) Certificates of Deposit
3) Letters of Credit
e) If, after notice and the opportunity for hearing, the Department determines that any of the requirements of the Act or this Part or the orders of the Department have not been complied with within the time limit set by any notice of violation issued thereunder, the permittee's bond or other collateral securities shall be subject to forfeiture pursuant to the following procedure (Section 1-65(c) of the Act):