Posts Tagged ‘road dust control’

image There are different types of construction dust that is created at the workplace. The type of construction and location of the site will determine what is in the air. Unlike road dust, construction dust is more than basic road dust.

The dryer regions of the country have a problem with particle matter floating in the air whose makeup is different than wetter regions where the nuisance dust could be from the saw dust that the building tools create. The cleaning up of the loose debris is the solution for most dust problems that are actually created on the construction site that is directly caused by the construction process. The health hazards of construction site dust could include cement residue, asbestos, mineral fibers with a man made origin and the most common is wood dust.

The reason for the concern is the effects it has on the people working at the site and the surrounding region. When natural sources of dust from plants and animals combine with the airborne particles of the construction site, it could adversely affect the membranes of the occupance.

The US Department of Health and Human Service’s National Institute for Occupational Safety and Health consider silicosis has a major problem and cause of health problems that has its origins from construction dust. Construction dust control from the particle matter smaller the 10 micrometers or PM10 has to be approached from a different perspective  than those that are naturally occurring in our environment

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An approach to road dust control  must take into account the type of road and the terrain in which it is situated. The solution for a paved road in the desert will be very different than a gravel road in the rural upper Midwest. Since nuisance dust has many sources in the environment, a permanent solution is not feasible. But there are long term solutions and very short term solutions to road dust .

The shortest term solution is the spraying of water on the road surface. This is an environment-friendly solution, but only lasts until the water evaporates. Oils are a longer term solution, but are not nearly as environmentally friendly as water is. In some cases, like with Times Beach in Missouri, the oils are from a waste source and contain toxins. The oil that was used as the road dust control  product for Times Beach was only 6 cents a gallon, but contained dioxin and other toxic chemicals. This was an economical solution for the town and its dust problem, but a health and environmental nightmare. This has lead to a ban by many states for the use of waste oils as a road dust control product.

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Most Americans are not fully aware of the road dust problem that exists across the nation. This dust is of a different makeup from what is found around in most homes. The dust that accumulates around on the furniture is made up of some dirt particles, but its main component is dead human skin cells that have fallen off the occupants of the dwelling.

Agriculture producers seeking to reduce PM10 (dust) and volatile organic compounds can apply for assistance from the Natural Resources Conservation Service (NRCS).

NRCS has $1.8 million in Arizona along with technical expertise available to farmers and ranchers to improve air quality.

Applications are taken on a continuous basis. Feb. 26 is the deadline to apply for the current funding.

Approved applicants will receive up to 75 percent of the project paid; up to 90 percent if the applicant is from a historically underserved group.

Seven counties are eligible in Arizona, areas identified as non-attainment areas by the Environmental Protection Agency. Farmers and ranchers in Cochise, Gila, Maricopa, Pima, Pinal, Santa Cruz, and Yuma counties are eligible.

Conservation practices included in the program include: anaerobic digesters; feedlot and dairy dust control; tillage and harvest dust control; dirt road dust control; gravel pad track out systems; and grizzly track-out device systems.

Haul Road Dust Control is a vital element to the efficient operation of a mining business. Not just with regards to safety but as well to the workers health.  Surface mining operations make use of large off-road haul trucks considerably to transfer material on mining properties. Historical investigation, using the United States Environmental Protection Agency’s (EPA) emissions factors for unpaved haul roads, has revealed that haul trucks generate the preponderance of dust emissions from surface mining sites, accounting for roughly 78%-97% of all dust emissions. This is even greater with low value haul road dust control programs.

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Haul Road Dust Control is a vital element to the efficient operation of a mining business. Not just with regards to safety but also to the workers health.  Surface mining operations employ huge off-road haul trucks extensively to move material at mining properties. Past research, using the United States Environmental Protection Agency’s (EPA) emissions factors for unpaved haul roads, has exposed that haul trucks produce the bulk of dust emissions from surface mining sites, accounting for just about 78%-97% of total dust emissions. This is yet greater with low quality haul road dust control programs.

Observations of dust emissions from haul trucks prove that if the dust emissions are uncontrolled, they can become a safety risk by means of impairing the operator’s visibility. This increases the chance for haul truck accidents. However, the greatest long-term health danger of dust generated from hauling operations is due to inhalation of the respirable dust middle diameter <4 micrometers (?m) along with thoracic dust, which is comparable to the EPA’s characterization of PM10 particulate matter with a median diameter <10 ?m. Exposure to respirable dust has always been thought a health hazard at surface mining operations, in particular if silica dust is there.

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U.S. Department of Labor
Mine Safety and Health Administration (MSHA)

Respirable coal mine dust can cause lung diseases such as coal workers’ pneumoconiosis (CWP), emphysema, silicosis, and bronchitis—known collectively as black lung. Black lung can lead to lung impairment, permanent disability, and even death. While there is no cure for black lung, there are important and potentially life-saving measures that MSHA requires to be undertaken to reduce exposure to respirable coal mine dust and prevent disease. Even though these measures have been required for many years, new cases of black lung disease continue to occur among the nation’s coal miners, even in younger miners.

Recently, MSHA conducted a targeted enforcement initiative that focused on miners’ exposures to respirable coal mine dust at selected underground coal mines. As a result of the lessons MSHA learned during this initiative, the agency requests that underground coal mine operators conduct audits of their respirable dust monitoring and control programs and address any deficiencies.

Dust sampling programs did not adequately address proper maintenance of sampling equipment or ensure that samples are collected at the required times (either on shifts or days).

Many mining operations implement a haul road dust control program in order to decrease the level of fugitive dust in the work area. 

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