NR 664.1085(4)(b)1.a.a. To provide access to the surface impoundment for performing routine inspection, maintenance or other activities needed for normal operations. Examples of those activities include those times when a worker needs to open a port to sample liquid in the surface impoundment, or when a worker needs to open a hatch to maintain or repair equipment. After completing the activity, promptly secure the closure device in the closed position or reinstall the cover, as applicable, to the surface impoundment. NR 664.1085(4)(b)1.b.b. To remove accumulated sludge or other residues from the bottom of the surface impoundment. NR 664.1085(4)(b)2.2. Opening of a safety device, as defined in s. NR 665.1081, is allowed at any time conditions require doing so to avoid an unsafe condition. NR 664.1085(4)(c)(c) Inspect and monitor the air emission control equipment according to all of the following procedures: NR 664.1085(4)(c)1.1. Visually inspect the surface impoundment cover and its closure devices to check for defects that could result in air pollutant emissions. Defects include, but are not limited to, visible cracks, holes or gaps in the cover section seams or between the interface of the cover edge and its foundation mountings, broken, cracked or otherwise damaged seals or gaskets on closure devices and broken or missing hatches, access covers, caps or other closure devices. NR 664.1085(4)(c)3.3. Perform an initial inspection of the air emission control equipment on or before the date that the surface impoundment becomes subject to this section. Thereafter, perform the inspections at least once every year except for the special conditions provided for in sub. (7). NR 664.1085(5)(5) The owner or operator shall transfer hazardous waste to a surface impoundment subject to this section according to all of the following requirements: NR 664.1085(5)(a)(a) Except as provided in par. (b), transfer hazardous waste to the surface impoundment from another surface impoundment subject to this section or from a tank subject to s. NR 664.1084 using continuous hard-piping or another closed system that does not allow exposure of the waste to the atmosphere. For the purpose of complying with this paragraph, an individual drain system is a closed system when it meets 40 CFR part 63, subpart RR—National Emission Standards for Individual Drain Systems. NR 664.1085(5)(b)(b) Paragraph (a) does not apply when transferring a hazardous waste to the surface impoundment under any of the following conditions: NR 664.1085(6)(6) The owner or operator shall repair each defect detected during an inspection performed according to sub. (3) (c) or (4) (c) as follows: NR 664.1085(6)(a)(a) Make first efforts at repair of the defect no later than 5 calendar days after detection, and complete the repair as soon as possible but no later than 45 calendar days after detection except as provided in par. (b). NR 664.1085(6)(b)(b) Repair of a defect may be delayed beyond 45 calendar days if the owner or operator determines that repair of the defect requires emptying or temporary removal from service of the surface impoundment and no alternative capacity is available at the site to accept the hazardous waste normally managed in the surface impoundment. In this case, repair the defect the next time the process or unit that is generating the hazardous waste managed in the surface impoundment stops operation. Repair of the defect shall be completed before the process or unit resumes operation. NR 664.1085(7)(7) Following the initial inspection and monitoring of the cover as required by the applicable provisions of this subchapter, subsequent inspection and monitoring may be performed at intervals longer than one year in the case when inspecting or monitoring the cover would expose a worker to dangerous, hazardous or other unsafe conditions. In this case, the owner or operator may designate the cover as an “unsafe to inspect and monitor cover” and comply with all of the following requirements: NR 664.1085(7)(a)(a) Prepare a written explanation for the cover stating the reasons why the cover is unsafe to visually inspect or to monitor, if required. NR 664.1085(7)(b)(b) Develop and implement a written plan and schedule to inspect and monitor the cover using the procedures in the applicable section of this subchapter as frequently as practicable during those times when a worker can safely access the cover. NR 664.1085 HistoryHistory: CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06. NR 664.1086(1)(1) Applicability. This section applies to the control of air pollutant emissions from containers for which s. NR 664.1082 (2) references the use of this section for the air emission control. NR 664.1086(2)(a)(a) The owner or operator shall control air pollutant emissions from each container subject to this section according to the following requirements, as applicable to the container, except when the special provisions for waste stabilization processes specified in par. (b) apply to the container: NR 664.1086(2)(a)1.1. For a container having a design capacity greater than 0.1 m3 and less than or equal to 0.46 m3, control air pollutant emissions from the container according to the Container Level 1 standards in sub. (3). NR 664.1086(2)(a)2.2. For a container having a design capacity greater than 0.46 m3 that is not in light material service, control air pollutant emissions from the container according to the Container Level 1 standards in sub. (3). NR 664.1086(2)(a)3.3. For a container having a design capacity greater than 0.46 m3 that is in light material service, control air pollutant emissions from the container according to the Container Level 2 standards in sub. (4).