NR 664.0554(1)(1) What is a staging pile? A staging pile is an accumulation of solid, non-flowing remediation waste (as defined in s. NR 660.10) that is not a containment building and is used only during remedial operations for temporary storage at a facility. A staging pile shall be located within the contiguous property under the control of the owner or operator where the wastes to be managed in the staging pile originated. The department shall designate staging piles according to the requirements in this section. For the purposes of this section, “storage” includes mixing, sizing, blending or other similar physical operations as long as they are intended to prepare the wastes for subsequent management or treatment. NR 664.0554(2)(2) When may i use a staging pile? You may use a staging pile to store hazardous remediation waste (or remediation waste otherwise subject to land disposal restrictions) only if you follow the standards and design criteria the department has designated for that staging pile. The department shall designate the staging pile in a license or, at an interim license facility, in a license, closure plan or order (consistent with s. NR 670.072 (1) (e) and (2) (e)). The department shall establish conditions in the license, closure plan or order that comply with subs. (4) to (11). NR 664.0554(3)(3) What information must i provide to get a staging pile designated? When seeking a staging pile designation, you shall provide all of the following: NR 664.0554(3)(a)(a) Sufficient and accurate information to enable the department to impose standards and design criteria for your staging pile according to subs. (4) to (11). NR 664.0554(3)(b)(b) Certification by a qualified professional engineer for technical data, such as design drawings and specifications, and engineering studies, unless the department determines, based on information that you provide, that this certification is not necessary to ensure that a staging pile will protect human health and the environment. NR 664.0554(3)(c)(c) Any additional information the department determines is necessary to protect human health and the environment. NR 664.0554(4)(4) What performance criteria must a staging pile satisfy? The department shall establish the standards and design criteria for the staging pile in the license, closure plan or order. NR 664.0554(4)(a)(a) The standards and design criteria shall comply with all of the following: NR 664.0554(4)(a)1.1. The staging pile shall facilitate a reliable, effective and protective remedy. NR 664.0554(4)(a)2.2. The staging pile shall be designed so as to prevent or minimize releases of hazardous wastes and hazardous constituents into the environment, and minimize or adequately control cross-media transfer, as necessary to protect human health and the environment (for example, through the use of liners, covers, run-off or run-on controls, as appropriate). NR 664.0554(4)(a)3.3. The staging pile may not operate for more than 2 years, except when the department grants an operating term extension under sub. (9). You shall measure the 2-year limit, or other operating term specified by the department in the license, closure plan or order, from the first time you place remediation waste into a staging pile. You shall maintain a record of the date when you first placed remediation waste into the staging pile for the life of the license, closure plan, or order, or for 3 years, whichever is longer. NR 664.0554(4)(b)(b) In setting the standards and design criteria, the department shall consider all of the following factors: NR 664.0554(4)(b)3.3. Physical and chemical characteristics of the wastes to be stored in the unit. NR 664.0554(4)(b)5.5. Hydrogeological and other relevant environmental conditions at the facility that may influence the migration of any potential releases. NR 664.0554(4)(b)6.6. Potential for human and environmental exposure to potential releases from the unit. NR 664.0554(5)(5) May a staging pile receive ignitable or reactive remediation waste? You may not place ignitable or reactive remediation waste in a staging pile unless par. (a) or (b) applies: NR 664.0554(5)(a)(a) You have treated, rendered or mixed the remediation waste before you placed it in the staging pile so that both of the following apply: NR 664.0554(5)(b)(b) You manage the remediation waste to protect it from exposure to any material or condition that may cause it to ignite or react. NR 664.0554(6)(6) How do i handle incompatible remediation wastes in a staging pile? The term “incompatible waste” is defined in s. NR 660.10. You shall comply with all of the following requirements for incompatible wastes in staging piles: NR 664.0554(6)(b)(b) If remediation waste in a staging pile is incompatible with any waste or material stored nearby in containers, other piles, open tanks or land disposal units (for example, surface impoundments), you shall separate the incompatible materials, or protect them from one another by using a dike, berm, wall or other device. NR 664.0554(6)(c)(c) You may not pile remediation waste on the same base where incompatible wastes or materials were previously piled, unless the base has been decontaminated sufficiently to comply with s. NR 664.0017 (2). NR 664.0554(7)(7) Are staging piles subject to the land disposal restrictions in ch. NR 668 and the minimum technological requirements? No. Placing hazardous remediation wastes into a staging pile does not constitute land disposal of hazardous wastes or create a unit that is subject to the minimum technological requirements in s. NR 664.0221, 664.0251, 664.0301, 665.0221, 665.0254 or 665.0301. NR 664.0554 NoteNote: The original source for the minimum technological requirements is 42 USC 6924(o).