EPA CERCLA 108(b) Comments – Financial Assurance. Click Here to See CMA and The State of Colorado Comments. Jul 20, 2017 Comments of Proposed Rule on Financial Responsibility under CERCLA 108(b) for Hard Rocks Mining, Docket ID No. EPA-HQ-SFUND-2015-0781. To read CMA’s comments, please click HERE. To read the State of Colorado’s comments, please click HERE.