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Haul Roads. Dust control is required on all haul roads and unpaved vehicle and equipment traffic areas at construction sites, per Rule 8021 — Construction, Demolition, Excavation, Extraction, and Other Earthmoving Activities. Storage Piles and Bulk Materials. The handling, storage, and transportation requirements for bulk materials are found in Rule 8031 —Bulk Materials. These requirements include: applying water as materials are handled, stabilizing or covering stored materials, and installing wind barriers to limit VDE. Limiting vehicle speed, loading haul trucks with a freeboard six inches or greater, covering haul trucks, or applying water to the top of the load are options for reducing VDE from vehicle transportation of bulk materials. Demolition. Wetting of the exterior of a building to be demolished is required. Demolition debris and the area around the demolition must also be controlled to limit VDE. Cleaning up carryout and trackout must be completed according to Rule 8041. Demolition activities are also subject to the District's asbestos rule, Rule 4002 —National Emission Standards for Hazardous Air Pollutants. Dust Control Plans. For large construction projects, Rule 8021 requires the owner or contractor to submit a Dust Control Plan to the District for approval at least 30 days prior to commencing construction activities. This requirement applies to projects that include 40 or more acres of disturbed surface area or will involve moving more than 2,500 cubic yards per day of material on at least three days during the project. Record keeping. All sites subject to the regulation that employ dust control measures must keep records for each day any dust controls are used. The District has developed record keeping forms for water application, street sweeping, and for "permanent" controls such as applying long term dust palliatives, vegetation, ground cover materials, paving, or other durable materials. Pursuant to Rule 801.1, records must be kept for one year after the end of dust generating activities. Exemptions. Activities in areas above 3,000 feet elevation are exempt from all Regulation VIII requirements. The following exemptions in Rule 8021 apply to construction activities: Blasting activities Maintenance and remodeling of existing buildings if the addition is less than 50% of the size of the existing building or 10,000 square feet. These activities, however, are subject to the District's asbestos rule, Rule 4002. Additions to single family dwellings Mowing, disking or other weed control on sites less than '/z acre. Nuisance. Whether or not the construction activity is exempt from the Regulation VIII requirements, any activity that creates fugitive dust must not cause a nuisance, per Rule 4102 - Nuisance. Therefore, it is important to monitor the dust generating activities and, if necessary, plan for and implement the appropriate dust control measures to limit the public's exposure to fugitive dust. This is a basic summary of Regulation VIII as it applies to the construction industry. For more information contact the Compliance Division of the District office nearest to you.