We use a proprietary blend dust suppressant chemicals that allow for dust to be controlled for up to 4 months, depending upon the amount of truck/car traffic. The blend holds moisture in aggregate base and binds the fine particles to create a strong surface.

Noticeable vehicle corrosion is not likely to be associated with dust control applications of calcium chloride. First, the application rate is relatively low, so there is not much of it available to come into contact with passing vehicles. Second, thecalcium chloride tends to remain in the road bed. If it didn’t, it wouldn’t control dust very well because it would disappear from the road after a short while. If you are concerned about your vehicle, a basic car wash will remove it quickly.

We recommend waiting for 2-3 hours before driving on the site in order to allow the DUSTDOWN to soak into the ground.

Although the length of time depends upon the amount of traffic your job site gets, you can typically expect the road to remain dust free for 3-4 months. But with continual use the base will continue to get harder, and will not need to be treated nearly as much over time.

Dust is any tiny particle that lies on the ground or is carried into the air. Common sources of outdoor dust are sand, stone, pollen or dirt. According to air pollution studies nearly 34% of particulate matter in the atmosphere originates from unpaved roads. (Bernard et al 1992)

Sounds malicious doesn’t it? “Fugitive dust” is the dust that moves beyond the property line where it was generated. Typically the source of fugitive dust is a quarry, construction site or manufacturing plant. It can also be the dust that leaves a road and ends up in someone’s house. Fugitive dust can be a problem for those with allergies, heart conditions or asthma.

Dust control is a preventative maintenance program used on gravel roads, gravel parking lots, haul roads, or any unpaved surface. A dust suppressant is sprayed on the unpaved surface in either one or two coats. The dust suppressant will hold the particles together and reduce the amount of fine particulate that escapes into the air. Depending on the suppressant used, either the ground says damp or the ground gets sticky. The idea is to keep small particles on the ground where they form a hard surface.

First the unpaved road or parking lot is graded to remove any low spots, potholes or ruts. The surface is crowned or pitched so that any rain water will roll off and not settle on the surface. Then a dust suppressant is applied and allowed to settle in. A vibratory roller is often used to compact the surface also. Vehicular traffic will continue to compact the surface over time.

Primarily the EPA, but state and local agencies also have regulations that address acceptable levels of fugitive dust. Quarries, power plants, landfills, and large manufacturing plants file pm10 management plans with the EPA.

A by product of paper production is lignon sulfonate. This is also known as tree sap. It is used for dust control on gravel roads and storage yards by binding particulate together.

The most common method of controlling dust during a building demolition in the Chicago suburbs is by spraying water on the job site. Gasaway can provide various size tank trucks and drivers with hoses and nozzles when a water source is not readily available.

Most dust on construction sites comes from disturbed dirt during excavation. Commonly water and dust suppressants are applied to the haul roads to keep dust from leaving the job site. Gasaway can provide site specific dust control plans to reduce fugitive dust and comply with EPA regulations.

Dust on roads can be controlled by applying a dust suppressant. Calcium chloride, lignon sulfonate, and magnesium chloride are cost effective and commonly used in the Midwest. It is best to apply after the road has been graded and ruts removed.

Gasaway prepares the surfaces with a proprietary blend of prewet. Then the dust suppressant is applied is two coats to facilitate absorption complete coverage. Choosing the best dust suppressant for the site is critical.

In the Midwest dust control is usually applied to gravel roads in late spring and early summer. If the summer is especially dry a second application is recommended.

When is the best time to apply dust suppressants to a gravel road to control fugitive dust?

A dust control program designed for a road or industrial property will reduce the particulate that enters the surrounding air and reduce silt runoff into local streams. The EPA regulate air pollution and water pollution.

When applied properly by trained operators dust suppressants penetrate the surface of the area being treated. Studies show the compounds stay in place and do not run off the road bed. Nearby lakes, rivers streams are not affected.

Dust is created by every vehicle that passes over an unpaved surface.

The amount of dust created depends on:

• Volume of traffic – more vehicles means more dust
• Speed of vehicles – the faster the vehicles pass over the surface the more dust
• Weight of vehicles – Heavier vehicles crush the stone underneath causing more dust
• Abrasive resistance of the road surface – a rougher road surface crushes more easily
• The amount of fines in the aggregate mix – the smaller the particles the easier it is to become airborne
• The Climatic conditions – high heat and low humidity create more dust