NR 406.04(1)(zc)(zc) The addition or replacement of the following equipment at a nonmetallic mineral processing facility which has an operation permit or which has filed a complete application for an operation permit pursuant to ch. NR 407: NR 406.04(1)(zc)10.10. Any other nonmetallic mineral processing equipment subject to s. NR 440.688 other than an initial crusher or initial grinding mill. NR 406.04(1)(zg)(zg) Equipment that temporarily increases steam generation capability at a source provided that all of the following conditions are met: NR 406.04(1)(zg)1.1. The equipment will be installed and operated only when at least one of the permanent steam generating units at the source is out of service for maintenance, repair, or an emergency, except that the temporary equipment and the permanent steam generating equipment being taken out of service for maintenance, repair, or an emergency may operate simultaneously for up to 24 hours during startup or shutdown of the permanent steam generating equipment. NR 406.04(1)(zg)2.2. The equipment will not be operated for more than 3,200 hours and will be shut down and removed within 9 calendar months after installation. NR 406.04(1)(zg)5.5. All applicable monitoring requirements will be met during the equipment’s period of use. NR 406.04(1)(zg)6.6. Use of the equipment will not cause or exacerbate an exceedance of any ambient air quality standard or ambient air increment in s. NR 404.04 or 404.05. NR 406.04(1)(zg)7.7. A complete application for exemption is submitted to the department for approval. The application shall contain all of the following: NR 406.04(1)(zg)8.8. The department approves the application for exemption submitted under subd. 7. The department shall approve or deny the exemption in writing within 10 business days after receipt of a complete application. NR 406.04(1)(zh)1.1. Any construction, modification, replacement, relocation or reconstruction of an emissions unit at a stationary source which is exempt from the requirement to obtain an operation permit under s. NR 407.03 (1m), provided the stationary source still qualifies for the exemption under s. NR 407.03 (1m) after completion of the proposed construction, modification, replacement, relocation or reconstruction. NR 406.04(1)(zh)2.2. Construction of a new facility if the facility will be exempt from the requirement to obtain an operation permit under s. NR 407.03 (1m) after completion of the proposed construction. NR 406.04(1f)(1f) Modifications to sources under plant-wide applicability limitations. Notwithstanding the provisions of subs. (1) and (2), no construction permit is required for modification of a source that is regulated by a plant-wide applicability limitation under s. NR 405.18 or 408.11 provided all of following criteria are met: NR 406.04(1f)(a)(a) The modification will not cause or exacerbate an exceedance of an ambient air quality increment or standard.