NR 440.285(4)(b)2.b.b. Measure seal gaps around the entire circumference of the storage vessel in each place where a 0.32-cm diameter uniform probe passes freely (without forcing or binding against the seal) between the seal and the wall of the storage vessel and measure the circumferential distance of each such location. NR 440.285(4)(b)2.c.c. The total surface area of each gap described in subd. 2. b. shall be determined by using probes of various widths to measure accurately the actual distance from the storage vessel wall to the seal and multiplying each such width by its respective circumferential distance. NR 440.285(4)(b)3.3. Add the gap surface area of each gap location for the primary seal and the secondary seal individually and divide the sum for each seal by the nominal diameter of the storage vessel and compare each ratio to the respective standards in subd. 4. NR 440.285(4)(b)4.4. Make necessary repairs or empty the storage vessel within 45 days of identification in any inspection for seals not meeting the requirements listed in subd. 4. a. NR 440.285(4)(b)4.a.a. The accumulated area of gaps between the storage vessel wall and the mechanical shoe or liquid-mounted primary seal may not exceed 212 cm2 per meter of storage vessel diameter, and the width of any portion of any gap may not exceed 3.81 cm. 1) One end of the mechanical shoe is to extend into the stored liquid, and the other end is to extend a minimum vertical distance of 61 cm above the stored liquid surface.
2) There may be no holes, tears, or other openings in the shoe, seal fabric, or seal envelope.
1) The secondary seal is to be installed above the primary seal so that it completely covers the space between the roof edge and the storage vessel wall except as provided in subd. 2. c.
2) The accumulated area of gaps between the storage vessel wall and the secondary seal may not exceed 21.2 cm2 per meter of storage vessel diameter, and the width of any portion of any gap may not exceed 1.27 cm.
3) There may be no holes, tears, or other openings in the seal or seal fabric.
NR 440.285(4)(b)4.c.c. If a failure that is detected during inspections required in subd. 1 cannot be repaired within 45 days, a 30-day extension may be requested from the department in the inspection report required in sub. (6) (b) 4. An extension request shall include a demonstration of unavailability of alternate storage capacity and a specification of a schedule that will assure that the control equipment will be repaired or the vessel will be emptied as soon as possible. NR 440.285(4)(b)5.5. Notify the department 30 days in advance of any gap measurements required by subd. 1. to afford the department opportunity to have an observer present. NR 440.285(4)(b)6.6. Visually inspect the external floating roof, the primary seal, secondary seal, and fittings each time the vessel is emptied and degassed. NR 440.285(4)(b)6.a.a. If the external floating roof has defects, or the primary seal has holes, tears, or other openings in the seal or the seal fabric, the owner or operator shall repair the items as necessary so that none of the conditions specified in this paragraph exist before filling or refilling the storage vessel with VOL. NR 440.285(4)(b)6.b.b. For all the inspections required by this subdivision, the owner or operator shall notify the department in writing at least 30 days prior to the filling or refilling of each storage vessel to afford the department the opportunity to inspect the storage vessel prior to refilling. If the inspection required by this subdivision is not planned and the owner or operator could not have known about the inspection 30 days in advance of refilling the storage vessel, the owner or operator shall notify the department at least 7 days prior to the refilling of the storage vessel. Notification shall be made by telephone immediately followed by written documentation demonstrating why the inspection was unplanned. Alternatively, this notification including the written documentation may be made in writing and sent by express mail so that it is received by the department at least 7 days prior to the refilling. NR 440.285(4)(c)(c) The owner or operator of each source that is equipped with a closed vent system and control device as required in sub. (3) (a) 3. or (b) 2. (other than a flare) is exempt from s. NR 440.08 and shall meet the following requirements: NR 440.285(4)(c)1.a.a. Documentation demonstrating that the control device will achieve the required control efficiency during maximum loading conditions. This documentation shall include a description of the gas stream which enters the control device, including flow and VOC content under varying liquid level conditions (dynamic and static) and manufacturer’s design specifications for the control device. If the control device or the closed vent capture system receives vapors, gases, or liquids other than fuels from sources that are not designated sources under this section, the efficiency demonstration shall include consideration of all vapors, gases, and liquids received by the closed vent capture system and control devices. If an enclosed combustion device with a minimum residence time of 0.75 seconds and a minimum temperature of 816°C is used to meet the 95% requirement, documentation that those conditions will exist is sufficient to meet the requirements of this paragraph. NR 440.285(4)(c)1.b.b. A description of the parameter or parameters to be monitored to ensure that the control device will be operated in conformance with its design and an explanation of the criteria used for selection of that parameter (or parameters). NR 440.285(4)(c)2.2. Operate the closed vent system and control device and monitor the parameters of the closed vent system and control device in accordance with the operating plan submitted to the department in accordance with subd. 1., unless the plan was modified by the department during the review process. In this case, the modified plan applies. NR 440.285(4)(d)(d) The owner or operator of each source that is equipped with a closed vent system and a flare to meet the requirements in sub. (3) (a) 3. or (b) 2. shall meet the requirements as specified in the general control device requirements under s. NR 440.18 (5) and (6). NR 440.285(5)(a)(a) If, in the administrator’s judgment, an alternative means of emission limitation will achieve a reduction in emissions at least equivalent to the reduction in emissions achieved by any requirement in sub. (3), the administrator will publish in the federal register a notice permitting the use of the alternative means for purposes of compliance with that requirement. NR 440.285(5)(b)(b) Any notice under par. (a) will be published only after notice and an opportunity for a public hearing. NR 440.285(5)(c)(c) Any person seeking permission under this section shall submit to the administrator a written application including: NR 440.285(5)(c)1.1. An actual emissions test that uses a full-sized or scale-model storage vessel that accurately collects and measures all VOC emissions from a given control device and that accurately simulates wind and accounts for other emission variables such as temperature and barometric pressure. NR 440.285(5)(c)2.2. An engineering evaluation that the administrator determines is an accurate method of determining equivalence. NR 440.285(5)(d)(d) The administrator may condition the permission on requirements that may be necessary to ensure operation and maintenance to achieve the same emission reduction as specified in sub. (3).