An owner or operator of a sanitary landfill may establish proof of financial responsibility with the commission in lieu of the requirements of Section 17-17-233. Such proof may include surety bonds, certificates of deposit, securities, letter of credit, or other methods, as approved by the commission, showing that the owner or operator has sufficient financial resources to cover, at a minimum, the costs of complying with any closure and post-closure requirements. The owner or operator shall estimate such costs to the satisfaction of the commission.