NR 665.1085(3)(d)1.1. Visually inspect the fixed roof 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 roof sections or between the roof and the tank wall, broken, cracked or otherwise damaged seals or gaskets on closure devices and broken or missing hatches, access covers, caps or other closure devices.
NR 665.1085(3)(d)2.2. Perform an initial inspection of the fixed roof and its closure devices on or before the date that the tank becomes subject to this section. Thereafter, perform the inspections at least once every year except under the special conditions provided for in sub. (12).
NR 665.1085(3)(d)3.3. In the event that a defect is detected, repair the defect according to sub. (11).
NR 665.1085(3)(d)4.4. Maintain a record of the inspection according to s. NR 665.1090 (2).
NR 665.1085(4)(4)Owners and operators controlling air pollutant emissions from a tank using Tank Level 2 controls shall use one of the following tanks:
NR 665.1085(4)(a)(a) A fixed-roof tank equipped with an internal floating roof according to sub. (5).
NR 665.1085(4)(b)(b) A tank equipped with an external floating roof according to sub. (6).
NR 665.1085(4)(c)(c) A tank vented through a closed-vent system to a control device according to sub. (7).
NR 665.1085(4)(d)(d) A pressure tank designed and operated according to sub. (8).
NR 665.1085(4)(e)(e) A tank located inside an enclosure that is vented through a closed-vent system to an enclosed combustion control device according to sub. (9).
NR 665.1085(5)(5)The owner or operator who controls air pollutant emissions from a tank using a fixed-roof with an internal floating roof shall meet pars. (a) to (c).
NR 665.1085(5)(a)(a) Equip the tank with a fixed roof and an internal floating roof according to all of the following requirements:
NR 665.1085(5)(a)1.1. Design the internal floating roof to float on the liquid surface except when the floating roof must be supported by the leg supports.
NR 665.1085(5)(a)2.2. Equip the internal floating roof with a continuous seal between the wall of the tank and the floating roof edge that meets any of the following requirements:
NR 665.1085(5)(a)2.a.a. A single continuous seal that is either a liquid-mounted seal or a metallic shoe seal, as defined in s. NR 665.1081.
NR 665.1085(5)(a)2.b.b. Two continuous seals mounted one above the other. The lower seal may be a vapor-mounted seal.
NR 665.1085(5)(a)3.3. The internal floating roof shall meet all of the following specifications:
NR 665.1085(5)(a)3.a.a. Each opening in a non-contact internal floating roof, except for automatic bleeder vents (vacuum breaker vents) and the rim space vents, provides a projection below the liquid surface.
NR 665.1085(5)(a)3.b.b. Each opening in the internal floating roof is equipped with a gasketed cover or a gasketed lid except for leg sleeves, automatic bleeder vents, rim space vents, column wells, ladder wells, sample wells and stub drains.
NR 665.1085(5)(a)3.c.c. Each penetration of the internal floating roof for the purpose of sampling has a slit fabric cover that covers at least 90 percent of the opening.
NR 665.1085(5)(a)3.d.d. Each automatic bleeder vent and rim space vent is gasketed.
NR 665.1085(5)(a)3.e.e. Each penetration of the internal floating roof that allows for passage of a ladder has a gasketed sliding cover.
NR 665.1085(5)(a)3.f.f. Each penetration of the internal floating roof that allows for passage of a column supporting the fixed roof has a flexible fabric sleeve seal or a gasketed sliding cover.
NR 665.1085(5)(b)(b) Operate the tank according to all of the following requirements:
NR 665.1085(5)(b)1.1. When the floating roof is resting on the leg supports, the process of filling, emptying or refilling shall be continuous and shall be completed as soon as practical.
NR 665.1085(5)(b)2.2. Set automatic bleeder vents to closed at all times when the roof is floating, except when the roof is being floated off or is being landed on the leg supports.
NR 665.1085(5)(b)3.3. Prior to filling the tank, bolt or fasten closed (i.e., no visible gaps) each cover, access hatch, gauge float well or lid on any opening in the internal floating roof. Set rim space vents to open only when the internal floating roof is not floating or when the pressure beneath the rim exceeds the manufacturer’s recommended setting.
NR 665.1085(5)(c)(c) Inspect the internal floating roof according to all of the following requirements:
NR 665.1085(5)(c)1.1. Visually inspect the floating roof and its closure devices to check for defects that could result in air pollutant emissions. Defects include, but are not limited to, the internal floating roof is not floating on the surface of the liquid inside the tank, liquid has accumulated on top of the internal floating roof, any portion of the roof seals have detached from the roof rim, holes, tears or other openings are visible in the seal fabric, the gaskets no longer close off the hazardous waste surface from the atmosphere or the slotted membrane has more than 10 percent open area.