Performance Standard:

The Director of an approved State may allow discounting of closure cost estimates in section 258.71 (a), post-closure cost estimates in section 258.72 (a), and/or corrective action costs in section 258.73 (a) up to the rate of return for essentially risk free investments, net of inflation, under the following conditions:

258.75(a) the State Director determines that cost estimates are complete and accurate and the owner or operator has submitted a statement from a Registered Professional Engineer so stating;

258.75(b) the State finds the facility in compliance with applicable and appropriate permit conditions;

258.75(c) the State Director determines that the closure date is certain and the owner or operator certifies that there are no foreseeable factors that will change the estimate of site life; and

258.75(d) discounted cost estimates must be adjusted annually to reflect inflation and years of remaining life.