Utah Admin. Code R315-265-221 - Surface Impoundments - Design and Operating Requirements

(a) The owner or operator of each new surface impoundment unit, each lateral expansion of a surface impoundment unit, and each replacement of an existing surface impoundment unit shall install two or more liners, and a leachate collection and removal system between the liners, and operate the leachate collection and removal system, in accordance with Subsection R315-264-221(c), unless exempted under Subsections R315-264-221(d), (e), or (f).

(b) The owner or operator of each unit referred to in Subsection R315-265-221(a) shall notify the Director at least sixty days prior to receiving waste. The owner or operator of each facility submitting notice shall file a part B application within six months of the receipt of such notice.

(c) The owner or operator of any replacement surface impoundment unit is exempt from Subsection R315-265-221(a) if:

(1) The existing unit was constructed in compliance with the design standards of Subsections 3004(o)(1)(A)(i) and (o)(5) of the Resource Conservation and Recovery Act; and

(2) There is no reason to believe that the liner is not functioning as designed.

(d) The double liner requirement set forth in Subsection R315-265-221(a) may be waived by the Director for any monofill, if:

(1) The monofill contains only hazardous wastes from foundry furnace emission controls or metal casting molding sand, and such wastes do not contain constituents which would render the wastes hazardous for reasons other than the Toxicity Characteristic in Section R315-261-24, with EPA Hazardous Waste Numbers D004 through D017; an

(2)

(i)

(A) The monofill has at least one liner for which there is no evidence that such liner is leaking. For the purposes of Subsection R315-265-221(d) the term "liner" means a liner designed, constructed, installed, and operated to prevent hazardous waste from passing into the liner at any time during the active life of the facility, or a liner designed, constructed, installed, and operated to prevent hazardous waste from migrating beyond the liner to adjacent subsurface soil, ground water, or surface water at any time during the active life of the facility. In the case of any surface impoundment which has been exempted from the requirements of Subsection R315-265-221(a) on the basis of a liner designed, constructed, installed, and operated to prevent hazardous waste from passing beyond the liner, at the closure of such impoundment the owner or operator shall remove or decontaminate all waste residues, all contaminated liner material, and contaminated soil to the extent practicable. If all contaminated soil is not removed or decontaminated, the owner or operator of such impoundment shall comply with appropriate post-closure requirements, including but not limited to ground-water monitoring and corrective action;

(B) The monofill is located more than one-quarter mile from an "underground source of drinking water", as that term is defined in Section R315-270-2; and

(C) The monofill is in compliance with generally applicable ground-water monitoring requirements for facilities with permits under RCRA section 3005(c); or

(ii) The owner or operator demonstrates that the monofill is located, designed and operated so as to assure that there will be no migration of any hazardous constituent into ground water or surface water at any future time.

(e) In the case of any unit in which the liner and leachate collection system has been installed pursuant to the requirements of Subsection R315-265-221(a) and in good faith compliance with Subsection R315-265-221(a) and with guidance documents governing liners and leachate collection systems under Subsection R315-265-221(a), no liner or leachate collection system which is different from that which was so installed pursuant to Subsection R315-265-221(a) will be required for such unit by the Director when issuing the first permit to such facility, except that the Director will not be precluded from requiring installation of a new liner when the Director has reason to believe that any liner installed pursuant to the requirements of Subsection R315-265-221(a) is leaking.

(f) A surface impoundment shall maintain enough freeboard to prevent any overtopping of the dike by overfilling, wave action, or a storm. Except as provided in Subsection R315-265-221(b), there shall be at least 60 centimeters, two feet, of freeboard.

(g) A freeboard level less than 60 centimeters, two feet, may be maintained if the owner or operator obtains certification by a qualified engineer that alternate design features or operating plans will, to the best of his knowledge and opinion, prevent overtopping of the dike. The certification, along with a written identification of alternate design features or operating plans preventing overtopping, shall be maintained at the facility.

(h) Surface impoundments that are newly subject to RCRA section 3005(j)(1) due to the promulgation of additional listings or characteristics for the identification of hazardous waste shall be in compliance with Subsections R315-265-221(a), (c) and (d) not later than 48 months after the promulgation of the additional listing or characteristic. This compliance period shall not be cut short as the result of the promulgation of land disposal prohibitions under Rule R315-268 or the granting of an extension to the effective date of a prohibition pursuant to Section R315-268-5, within this 48-month period.

Notes

Utah Admin. Code R315-265-221

Adopted by Utah State Bulletin Number 2019-21, effective 10/15/2019