This animation shows simulated hourly surface ozone concentrations during the 2014 FRAPPÉ campaign. The simulations have been performed with the Weather Research and Forecasting Model (WRF) Community Multiscale Air Quality (CMAQ) model. The simulations have been conducted with a 4 km x 4 km grid horizontal resolution and show the frequent occurrence of high ozone pollution in the Colorado Front Range and the transport of this pollution into the nearby mountains during upslope events.
Air quality discussions address the emissions of pollutants from transportation systems which can be harmful to human beings, the natural environment, and the integrity of man-made materials. The Colorado Department of Transportation (CDOT) conducts air quality evaluations for its projects. The CDOT Environmental Programs Branch (EPB) or Regional Air Quality Specialist evaluates the potential for air quality impacts from a proposed transportation project and then determines if coordination with the Colorado Department of Public Health and the Environment Air Pollution Control Division.
The Air Pollution Control Division has evaluated and reviewed its smoke management program in light of increasing the support and use of prescribed fire in Colorado in balance with existing state statute and public health, welfare and visibility mandates.
The overall purpose of the Colorado Department of Transportations (CDOTs) Air Quality Program Book is to provide a single-source reference that summarizes the major elements of CDOT's various Air Quality Programs. The Air Quality Program Book is intended to give the user the opportunity to assess project-specific needs and provide direction to additional information, as needed.
The primary goals of this study are to: Develop comprehensive inventories of Prevention of Significant Deterioration (PSD) increment consuming emissions for nitrogen oxides (NOx) in southwest Colorado; Develop meteorological fields as necessary for input to the Industrial Source Complex (ISC3) and CALPUFF models; Setup and run the ISC3 and CALPUFF models for appropriate near-field and far-field receptors, respectively; Compare modeled concentration estimates with appropriate Class I and Class II NO2 increments.
These reports discusses results for ambient air toxics monitoring conducted by the Colorado Department of Public Health and Environment (CDPHE) at the long-term trends site at Grand Junction, Colorado. This site was established as part of the "rural" area component of the EPA National Air Toxics Trends Study. Since that time, the EPA has reconsidered, and decided that the site is more indicative of urban concentrations, and has changed the designation of the site from rural to urban. Most of the compounds detected at Grand Junction are found in urban air nationwide. The majority of compounds can be related to motor vehicle sources. These include formaldehyde, benzene, toluene, ethylbenzene, xylenes, and styrene.
Continuous monitoring systems (CMS) play an important role in the field of air pollution control. More specifically, these systems are often used as a tool to ensure that an emission unit is meeting an emission standard, or a set of emission standards on a continuous basis. There are several types of CMS that can accomplish this purpose. The type of CMS that is required on an emission unit is specified in the applicable regulation.
