7805 40TH AVE W 2022-05-12 - Laserfiche WebLink

Inspection and Maintenance plan: Maintain until stockpiles are removed from site. • Dust Control(BMP C140) Installation Schedules and Inspection and Maintenance plan: ❑ Vegetate or mulch areas that will not receive vehicle traffic. In areas where planting, mulching, or paving is impractical, apply gravel or landscaping rock. ❑ Limit dust generation by clearing only those areas where immediate activity will take place, leaving the remaining area(s) in the original condition. Maintain the original ground cover as long as practical. ❑ Construct natural or artificial windbreaks or windscreens. These may be designed as enclosures for small dust sources. ❑ Sprinkle the site with water until surface is wet. Repeat as needed. To prevent carryout of mud onto street,refer to Stabilized Construction Entrance(BMP C105). ❑ Irrigation water can be used for dust control. Irrigation systems should be installed as a first step on sites where dust control is a concern. ❑ Spray exposed soil areas with a dust palliative, following the manufacturer's instructions and cautions regarding handling and application. Used oil is prohibited from use as a dust suppressant. Local governments may approve other dust palliatives such as calcium chloride or PAM. ❑ PAM(BMP C126) added to water at a rate of 0.5 lbs.per 1,000 gallons of water per acre and applied from a water truck is more effective than water alone. This is due to increased infiltration of water into the soil and reduced evaporation. In addition, small soil particles are bonded together and are not as easily transported by wind. Adding PAM may actually reduce the quantity of water needed for dust control. Use of PAM could be a cost-effective dust control method. Techniques that can be used for unpaved roads and lots include: ❑ Lower speed limits. High vehicle speed increases the amount of dust stirred up from unpaved roads and lots. ❑ Upgrade the road surface strength by improving particle size, shape, and mineral types that make up the surface and base materials. ❑ Add surface gravel to reduce the source of dust emission. Limit the amount of fine particles(those smaller than .075 mm)to 10 to 20 percent. ❑ Use geotextile fabrics to increase the strength of new roads or roads undergoing reconstruction. ❑ Encourage the use of alternate,paved routes, if available. ❑ Restrict use of paved roadways by tracked vehicles and heavy trucks to prevent damage to road surface and base. ❑ Apply chemical dust suppressants using the admix method,blending the product with the top few inches of surface material. Suppressants may also be applied as surface treatments. ❑ Pave unpaved permanent roads and other trafficked areas. ❑ Use vacuum street sweepers. ❑ Remove mud and other dirt promptly so it does not dry and then turn into dust. ❑ Limit dust-causing work on windy days. Page 112