40 CFR § 264.250 - Applicability.
(b) The regulations in this subpart do not apply to owners or operators of waste piles that are closed with wastes left in place. Such waste piles are subject to regulation under subpart N of this part (Landfills).
(c) The owner or operator of any waste pile that is inside or under a structure that provides protection from precipitation so that neither run-off nor leachate is generated is not subject to regulation under § 264.251 or under subpart F of this part, provided that:
(3) The pile is designed and operated to control dispersal of the waste by wind, where necessary, by means other than wetting; and
The following state regulations pages link to this page.