40 C.F.R. § 14.10
The EPA Claims Officer, at his discretion, may reconsider a decision when the employee establishes that an error was made in the computation of the award or that evidence or material facts were unavailable to the employee at the time of the filing of the claim and the failure to provide the information was not the result of the employee's lack of care. An employee seeking reconsideration of a decision must file, within 30 days of the date of the decision, a written request with the EPA Claims Officer for reconsideration. The request for reconsideration must specify, where applicable, the error, the evidence or material facts not previously considered by the EPA Claims Officer and the reason why the employee believes that the evidence or facts previously were not available.
40 C.F.R. § 14.10