Emission Characteristics of Hazardous Air Pollutants from Construction Equipment

National Emission Standards for Hazardous Air Pollutants

Hazardous Air Pollutants Special Report

While recent reports have commented on the elevated ambient levels of hazardous air pollutants (HAPs) in certain areas of Houston, relative to other cities, few studies have assessed the health effects of HAPs for Houstonians and none have evaluated the association between ambient levels of these pollutants and lymphohematopoietic cancer risk in this population. To begin to address this deficit...

Hazardous air pollutants and asthma.

Asthma has a high prevalence in the United States, and persons with asthma may be at added risk from the adverse effects of hazardous air pollutants (HAPs). Complex mixtures (fine particulate matter and tobacco smoke) have been associated with respiratory symptoms and hospital admissions for asthma. The toxic ingredients of these mixtures are HAPs, but whether ambient HAP exposures can induce a...

Emission Rates of Air Pollutants Exhausted from Railroad Diesel Engines

It is widely known that the railroad diesel locomotive engines emit significant amount of air pollutants. However, these engines are not equipped with any air pollutants reducing devices in Korea, resulting in the accumulative air pollution near the railroad. Because the pollutants emission from driving locomotive engines cannot be measured directly, the emission factors based on the amount of ...

Web-Based Access and Visualization of Hazardous Air Pollutants

This paper reports on a project to provide Web-based access to the US Environmental Protection Agency’s (EPA’s) extensive model-based summaries of hazardous air pollutants (HAPs). As part of EPA’s Cumulative Exposure Project, long-term cumulative concentrations of 148 HAPs for the 60,803 census tracts in the 48 contiguous states have been modeled for 1990. The model results include estimates an...