NR 661.1084(5)(c)5.5. In the event that a defect is detected, the remanufacturer or other person that stores or treats the hazardous secondary material shall repair the defect in accordance with the requirements under sub. (11). NR 661.1084(5)(c)6.6. The remanufacturer or other person that stores or treats the hazardous secondary material shall maintain a record of the inspection in accordance with the requirements specified in s. NR 661.1089 (2). NR 661.1084(5)(d)(d) Safety devices, as defined in s. NR 661.1081, may be installed and operated as necessary on any tank complying with the requirements specified in this subsection. NR 661.1084(6)(6) The remanufacturer or other person that stores or treats the hazardous secondary material who controls air pollutant emissions from a tank using an external floating roof shall meet the requirements specified in pars. (a) to (c). NR 661.1084(6)(a)(a) The remanufacturer or other person that stores or treats the hazardous secondary material shall design the external floating roof in accordance with all of the following requirements: NR 661.1084(6)(a)1.1. The external floating roof shall be designed to float on the liquid surface except when the floating roof is supported by the leg supports. NR 661.1084(6)(a)2.2. The floating roof shall be equipped with 2 continuous seals, one above the other, between the wall of the tank and the roof edge. The lower seal is referred to as the primary seal, and the upper seal is referred to as the secondary seal. The primary seal and secondary seal shall meet the following requirements: NR 661.1084(6)(a)2.a.a. The primary seal shall be a liquid-mounted seal or a metallic shoe seal, as defined in s. NR 661.1081. The total area of the gaps between the tank wall and the primary seal may not exceed 212 square centimeters per meter of tank diameter, and the width of any portion of these gaps may not exceed 3.8 centimeters. If a metallic shoe seal is used for the primary seal, the metallic shoe seal shall be designed so that one end extends into the liquid in the tank and the other end extends a vertical distance of at least 61 centimeters above the liquid surface. NR 661.1084(6)(a)2.b.b. The secondary seal shall be mounted above the primary seal and cover the annular space between the floating roof and the wall of the tank. The total area of the gaps between the tank wall and the secondary seal may not exceed 21.2 square centimeters per meter of tank diameter, and the width of any portion of these gaps may not exceed 1.3 centimeters. NR 661.1084(6)(a)3.3. The external floating roof shall meet all of the following specifications: NR 661.1084(6)(a)3.a.a. Except for automatic bleeder vents, vacuum breaker vents, and rim space vents, each opening in a noncontact external floating roof shall provide a projection below the liquid surface. NR 661.1084(6)(a)3.b.b. Except for automatic bleeder vents, rim space vents, roof drains, and leg sleeves, each opening in the roof shall be equipped with a gasketed cover, seal, or lid. NR 661.1084(6)(a)3.c.c. Each access hatch and each gauge float well shall be equipped with a cover designed to be bolted or fastened when the cover is secured in the closed position. NR 661.1084(6)(a)3.d.d. Each automatic bleeder vent and each rim space vent shall be equipped with a gasket. NR 661.1084(6)(a)3.e.e. Each roof drain that empties into the liquid managed in the tank shall be equipped with a slotted membrane fabric cover that covers at least 90 percent of the area of the opening. NR 661.1084(6)(a)3.f.f. Each unslotted and slotted guide pole well shall be equipped with a gasketed sliding cover or a flexible fabric sleeve seal. NR 661.1084(6)(a)3.g.g. Each unslotted guide pole shall be equipped with a gasketed cap on the end of the pole. NR 661.1084(6)(a)3.h.h. Each slotted guide pole shall be equipped with a gasketed float or other device that closes off the liquid surface from the atmosphere. NR 661.1084(6)(b)(b) The remanufacturer or other person that stores or treats the hazardous secondary material shall operate the tank in accordance with all of the following requirements: NR 661.1084(6)(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 661.1084(6)(b)2.2. Except for automatic bleeder vents, rim space vents, roof drains, and leg sleeves, each opening in the roof shall be secured and maintained in a closed position at all times except when the closure device must be open for access. NR 661.1084(6)(b)3.3. Covers on each access hatch and each gauge float well shall be bolted or fastened when secured in the closed position. NR 661.1084(6)(b)4.4. Automatic bleeder vents shall be set 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 661.1084(6)(b)5.5. Rim space vents shall be set to open only at those times that the roof is being floated off the roof leg supports or when the pressure beneath the rim seal exceeds the manufacturer’s recommended setting. NR 661.1084(6)(b)6.6. The cap on the end of each unslotted guide pole shall be secured in the closed position at all times except when measuring the level or collecting samples of the liquid in the tank. NR 661.1084(6)(b)7.7. Except when the hatch or well must be opened for access, the cover on each gauge hatch or sample well shall be secured in the closed position at all times. NR 661.1084(6)(b)8.8. Except during inspections, both the primary seal and the secondary seal shall completely cover the annular space between the external floating roof and the wall of the tank in a continuous fashion. NR 661.1084(6)(c)(c) The remanufacturer or other person that stores or treats the hazardous secondary material shall inspect the external floating roof in accordance with all of the following procedures: