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• Add surface gravel to reduce the source of dust emission. Limit the <br /> amount of fine particles(those smaller than.075 mm)to 10 to 20 <br /> tpercent. <br /> • Use geotextile fabrics to increase the strength of new roads or roads <br /> ' undergoing reconstruction. <br /> • Encourage the use of alternate,paved routes, if available. <br /> ' • Restrict use by tracked vehicles and heavy trucks to prevent damage to <br /> road surface and base. <br /> • Apply chemical dust suppressants using the admix method,blending <br /> ' the product with the top few inches of surface material. Suppressants <br /> may also be applied as surface treatments. <br /> ' • Pave unpaved permanent roads and other trafficked areas. <br /> • Use vacuum street sweepers. <br /> • Remove mud and other dirt promptly so it does not dry and then turn <br /> into dust. <br /> • Limit dust-causing work on windy days. <br /> ' • Contact your local Air Pollution Control Authority for guidance and <br /> training on other dust control measures. Compliance with the local Air <br /> Pollution Control Authority constitutes compliance with this BMP. <br /> ' Maintenance Respray area as necessaryto keepdust to a minimum. <br /> P Y <br /> Standards <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> I <br /> 1 <br /> February 2005 Volume 11—Construction Stormwater Pollution Prevention 4-41 <br />