NR 415.075(3)(d)(d) Emissions from activities not associated with processing equipment, including but not limited to roads, other areas used by haul trucks, storage piles and drilling, shall be controlled so that visible emissions do not exceed 5% opacity at the source. NR 415.075(3)(e)(e) Roads and other areas used by haul trucks shall be paved with asphalt, concrete or other material approved by the department, or treated by other methods of dust control which the department approves for the particular road, driveway or trafficable area so that the visible emissions limits of pars. (c) and (d) are met. Other methods of dust control which may be approved by the department include but are not limited to periodic application of water or suitable chemicals provided the application does not create a hydrocarbon, odor or water pollution problem. In reviewing and approving other materials or methods for compliance with this subsection, the department shall consider the effects of the use of paving or other methods of dust control upon the rate and volume of surface water runoff and water quality. All roads and other areas, if paved, shall be kept free of material likely to become airborne, through a program of periodic cleaning. NR 415.075(4)(a)(a) Except as provided in par. (b), the owner or operator of any operation subject to the provisions of this section shall set up, operate and report the results obtained with a particulate matter ambient air monitoring system. The monitoring system shall comply with all of the following requirements: NR 415.075(4)(a)1.1. A plan that describes the ambient air monitoring program shall be submitted to the department within 30 days of the date of issuance of a permit under ch. NR 406 or 407. NR 415.075(4)(a)2.2. The department shall review the plan to determine whether it will provide accurate and reliable monitoring at the operation site. Department approval, conditional approval or disapproval of any ambient air monitoring plan shall be completed within 60 days of receipt of the plan. NR 415.075(4)(a)3.3. Monitoring for particulate matter shall be conducted for a 24-hour period on the 6 day schedule established by the U.S. environmental protection agency, or more frequently if required by the department. The department shall specify the schedule in the approved plan. NR 415.075(4)(a)4.4. Monitoring results shall be submitted to the department on a monthly basis. Results for each month shall be postmarked or received by the department no later than the last day of the following month. NR 415.075(4)(a)5.5. The owner or operator shall start monitoring by 120 days from the date of permit issuance under ch. NR 407 or as specified in the ambient air monitoring plan for any source subject to the permit requirements of ch. NR 406. NR 415.075(4)(b)(b) The owner or operator of a source may apply for, and the department may grant, a variance from the monitoring requirements of this subsection if the applicant demonstrates that the general public will not be exposed to significant levels of particulate matter from the source, and that the source’s emissions units and processes are controlled to a level which meets all applicable requirements. The department may review any variance granted under this paragraph on a biennial basis. Following its review, the department may modify, extend or rescind the variance. NR 415.075(5)(5) Recordkeeping. Each owner or operator of any ledge rock quarry or industrial sand mine shall keep the following records. Recordkeeping and access to these records shall be in accordance with ss. NR 439.03 to 439.05. NR 415.075(6)(a)(a) Each owner or operator of any ledge rock quarry or industrial sand mine shall prepare a fugitive dust control plan to prevent, detect and correct malfunctions, equipment failures or other circumstances which may cause any applicable emission limitation to be violated or which may cause air pollution. The plan shall be in writing, and updated as needed, and shall include all of the following: NR 415.075(6)(a)1.1. Identification of the individual responsible for implementing the fugitive dust control plan. NR 415.075(6)(a)2.2. The maximum intervals for inspection and routine maintenance of fugitive dust control equipment, including a description of the items or conditions that will be checked. NR 415.075(6)(a)3.3. Schedules for watering, treating or periodic cleaning of roads, trafficable areas and storage piles. NR 415.075(6)(a)4.4. A listing of materials, equipment and spare parts that will be maintained in inventory. NR 415.075(6)(b)(b) The department may order any owner or operator to submit the plan required by par. (a) to the department for review. The department may request any owner or operator to amend the plan if deemed necessary for malfunction prevention or the reduction of excess emissions. NR 415.075(6)(c)(c) No owner or operator may fail to implement the plan required under par. (a) or as amended under par. (b). NR 415.075(6)(d)(d) All air pollution control equipment shall be operated and maintained in conformance with good engineering practices to minimize the possibility for the exceedance of any emission limitations. NR 415.075 HistoryHistory: Cr. Register, June, 1994, No. 462, eff. 7-1-94; am. (2) (a) 5. and (3) (c), Register, December, 1995, No. 480, eff. 1-1-96; CR 01-002: am. (3) (intro.), Register, October 2001 No. 550, eff. 11-1-01; correction in (3) (c) made under s. 13.93 (2m) (b) 7., Stats., Register October 2003 No. 574; correction in (2) (a) 5. made under s. 13.92 (4) (b) 6., Stats., Register April 2023 No. 808. NR 415.076NR 415.076 Particulate matter emission limitations for crushed stone and sand and gravel plants. NR 415.076(1)(a)(a) Except as provided in par. (b), the provisions of this section are applicable to the following direct or portable sources in fixed or portable crushed stone and sand and gravel plants: each crusher, screening operation, bucket elevator, belt conveyor or storage bin. NR 415.076(1)(b)(b) Direct or portable sources at the following plants are not subject to the provisions of this section: NR 415.076(1)(b)1.1. Fixed sand and gravel plants and fixed crushed stone plants with capacities of 25 tons per hour or less.