40 CFR § 265.229 - Special requirements for ignitable or reactive waste.
(a) The waste is treated, rendered, or mixed before or immediately after placement in the impoundment so that:
(2) Section 265.17(b) is complied with; or
(1) The waste is managed in such a way that it is protected from any material or conditions which may cause it to ignite or react; and
(2) The owner or operator obtains a certification from a qualified chemist or engineer that, to the best of his knowledge and opinion, the design features or operating plans of the facility will prevent ignition or reaction; and
(c) The surface impoundment is used solely for emergencies.
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