On receipt of a request for reconsideration of Federal findings from
a State agency, the Federal agency shall consider the initial
information supplied in connection with such request and shall review
its findings. The Federal agency shall correct any errors or omissions
in its findings and shall affirm, modify, or reverse any or all of its
findings in writing. The Federal agency promptly shall forward its
reconsidered findings to the requesting authority. The Federal agency
shall, if possible, respond within four workdays after the receipt of a
request under this section.