NR 407.03(1m)(c)1.1. The owner or operator of a facility required to submit an air emission inventory report under s. NR 438.03 shall notify the department of their intent to operate the facility under the exemption criteria in par. (a). NR 407.03(1m)(c)2.2. Any existing permit shall remain in effect until the permit is revoked or coverage under a general or registration permit is withdrawn. A notification under subd. 1. shall serve as a request for revocation of an individual permit or withdrawal from coverage under a general or registration permit. NR 407.03(1m)(c)3.3. A notification under subd. 1. shall serve as a request for withdrawal of any pending permit application. NR 407.03 NoteNote: An owner or operator exempt under this subsection is responsible for complying with all other applicable requirements in chs. NR 400 to 499. NR 407.03(1s)(a)(a) Eligibility. A facility that is a natural minor source is exempt from the requirement to obtain an operation permit. NR 407.03(1s)(b)1.1. An owner or operator claiming to be exempt under this subsection shall maintain records adequate to show it meets all criteria under the definition of a natural minor source. Emission calculations adequate to determine eligibility with this exemption shall be maintained and made available to a department representative if requested. NR 407.03(1s)(b)2.2. In addition to monitoring and recordkeeping requirements contained in any construction permit issued to the source under ch. NR 406, the owner or operator shall maintain records sufficient to demonstrate compliance with all other applicable requirements in chs. NR 400 to 499. NR 407.03(1s)(c)1.1. An owner or operator claiming exemption under this subsection and who has an existing permit or who has submitted a permit application under this chapter or under ch. NR 406, shall notify the department of an intent to operate under this exemption. NR 407.03(1s)(c)2.2. Any existing permit issued under this chapter shall remain in effect until the permit is revoked or coverage under a general or registration permit is withdrawn at the request of the owner or operator. NR 407.03(1s)(c)3.3. A notification under subd. 1. shall serve as a request for revocation of any permits issued under this chapter and for withdrawal of any pending operation permit application submitted under this chapter. NR 407.03(1s)(d)(d) Schedule. The owner or operator shall apply for an operation permit in accordance with the requirements of this chapter if any of the following affects the source’s ability to remain a natural minor source: NR 407.03(1s)(d)4.4. Other emission information indicating that the source is not a natural minor source becomes available. NR 407.03 NoteNote: An owner or operator exempt under this subsection is responsible for complying with all applicable requirements in chs. NR 400 to 499, including construction permit requirements identified in ch. NR 406 and all conditions contained in a permit issued under ch. NR 406. NR 407.03 NoteNote: The exemption in this subsection does not preclude the owner or operator of a natural minor source from requesting, and the Department from issuing, an operation permit as allowed under s. 285.60 (2) (b), Stats. NR 407.03 NoteNote: The Small Business Environmental Assistance Program at dnr.wi.gov may be contacted for more information on applicability and compliance determinations related to the requirements in chs. NR 400 to 499. NR 407.03(2)(2) General category of exempt sources. In addition to the specific categories of exempt sources identified in sub. (1), no operation permit is required for a direct source if the source is not a part 70 source or an affected source and all of the following requirements are met: NR 407.03(2)(a)(a) The maximum theoretical emissions from the source for sulfur dioxide or carbon monoxide do not exceed 9.0 pounds per hour for each air contaminant. NR 407.03(2)(b)(b) The maximum theoretical emissions from the source for particulate matter, nitrogen oxides or volatile organic compounds do not exceed 5.7 pounds per hour for each air contaminant. NR 407.03(2)(ba)(ba) The maximum theoretical emissions from the source for PM10 do not exceed 3.4 pounds per hour. NR 407.03(2)(be)(be) The maximum theoretical emissions from the source for PM2.5 do not exceed 2.2 pounds per hour. NR 407.03(2)(bm)(bm) The maximum theoretical emissions from the source for lead do not exceed 0.13 pounds per hour.