of failure to act If the Administrator fails to act on an appeal made under this subparagraph within the 15-day period specified under clause (iii), the amended plan of action of the eligible entity submitted under subparagraph (C) shall be deemed to be approved. (4) Termination of grant (A) In general The Administrator shall terminate a grant to an eligible entity under this section if the eligible entity fails to comply with— (i) a plan of action approved by the Assistant Administrator under paragraph (3)(B)(i)