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i San Joa F I , gain Valley Air Pollution Control District COMPLIANCE ASSISTANCE BULLETIN October 2004 Fugitive Dust Control at Construction i t on Si tes: New Req uirements Regulation VIII, Fugitive PM10 prohibitions, of the District's Rules and Regulations apply to activities 'that. generate. fugitive dust. Fugitive dust is emitted into-the air by activities. that disturb the soil, such as from earthmoving activities and vehicular/equipment traffic on unpaved surfaces. Windblown dust is also of concern at construction sites. The District adopted Regulation Vlll in 1993 and its most recent amendments became effective on October 1, 2004. This is a basic-summary of the regulation's requirements as they apply to construction sites. Visible Dust Emissions (VDE) may not exceed 20% opacity during periods when soil is being disturbed by equipment or by wind at any time. Visible Dust Emissions opacity of 20% means dust that would obstruct an obser`ver's view of,an object by 20%. District inspectors are state certified to evaluate visible emissions. Dust control may be achieved by applying water before/during earthwork and onto unpaved traffic areas, phasing work to limit dust, and setting up wind fences to limit wind blown dust. Soil Stabilization is required at regulated construction sites after normal working hours and on weekends and holidays. This requirement also applies to inactive construction areas such as phased projects where disturbed land is left unattended. Applying water to form a visible crust on the soil and restricting vehicle access are often effective for short-term stabilization of disturbed surface areas. Long-term methods including . applying dust suppressants and establishing vegetative cover. Carryout and.Trackout occur when materials from emptied or loaded vehicles falls onto a paved surface or shoulder of a public road or when materials adhere to vehicle tires and are deposited onto a paved surface or shoulder of a public road... Should either occur, the material must be cleaned up at least daily, and immediately if it extends more than 50 feet from the exit point onto a paved road. The- appropriate clean-up methods require the complete removal and cleanup of mud and dirt from the paved surface and shoulder. Using a blower device or dry sweeping with any mechanical device other than a PM10-efficient street sweeper is a violation. Larger construction sites must prevent'carryout and trackout from occurring-by installing gravel pads, grizzlies, wheel washers, paved interior roads, or a combination thereof at each exit point from the site. Access and Haul Roads that. are unpaved, as well as unpaved vehicle and equipment traffic areas at construction sites must have dust control. Speed. limit signs limiting vehicle speed to 15 mph or less at construction sites must be posted every 500 feet. Storage Piles and Bulk Materials have handling, storage; and .transportation requirements that include applying water when handling materials, wetting or covering stored materials, and installing wind barriers to . limit VDE. Also, limiting vehicle speeds, loading haul trucks with a freeboard of six inches or greater along Northern Region Office Central Region Office Southern Region Office 4230 Kiernan Avenue, Suite 130 1990 East Gettysburg Avenue Modesto,CA 95356-932193726-0244 2700"M Street,Suite 275 (209)557-6400 4 FAX(209)557-6475 Fresno,CA 93726Bakersfield, CA 93301-2378 (5S9) 230 6000 4, FAX(5559)9) 2 2346062 (661)326-6900 ♦ FAX(661) 326-6985