Office of Research and Development Publications

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The Detroit Exposure and Aerosol Research Study (DEARS) is a three-year field monitoring study initiated in 2004 that is designed to measure exposure and describe exposure relationships for air toxics, PM components, PM from specific sources, and criteria pollutants. Detroit, Mic...

The Detroit Exposure and Aerosol Research Study (DEARS) represents a multi-year assessment field study involving summer and winter season collection of personal, residential indoor, residential outdoor and central community monitoring measurements.

Numerous natural and man-made agents are continuously released into the environment due to human activity. Many of these agents cause irreversible damage to the normal biological functions leading to morbidity and mortality in the exposed organisms. The possibility of deliberat...

Population-based human exposure models predict the distribution of personal exposures to pollutants of outdoor origin using a variety of inputs, including air pollution concentrations; human activity patterns, such as the amount of time spent outdoors versus indoors, commuting, w...

Although Consumer products are a primary source of chemical exposures, little information is available on the chemical ingredients of these products and the concentrations at which they are present. To address this data gap, we have created a database of chemicals in consumer pro...

Source apportionment (receptor) models are mathematical procedures for identifying and quantifying the sources of ambient air pollutants and their effects at a site (the receptor), primarily on the basis of species concentration measurements at the receptor, and generally without...

Diffusive sampling of a mixture of 42 volatile organic compounds (VOCs) in humidified, purified air onto the solid adsorbent Carbopack X was evaluated under controlled laboratory conditions. The evaluation included variations in sample air temperature, relative humidity, and ozon...

Ogawa passive 03 samplers were used in a 13-233k study (June 1-September 1, 1999) involving 11 forested and mountaintop sites in north-central Pennsylvania. Four of the sites were collocated with TECO model 49 O3 analyzers. A significant correlation (p<0.0001) was found for 2...

Bayesian statistical methods are used to evaluate Community Multiscale Air Quality (CMAQ) model simulations of sulfate aerosol over a section of the eastern US for 4-week periods in summer and winter 2001. The observed data come from two U.S. Environmental Protection Agency data ...

This research focuses on the application of spatial statistical techniques for the evaluation of the Community Multiscale Air Quality (CMAQ) model. The upcoming release version of the CMAQ model was run for the calendar year 2001 and is in the process of being evaluated by EPA an...

There is no abstract for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field.

Review of the the book &quot;Ecological Indicators for the Nation&quot;. This book is the report of the Committee to Evaluate Indicators for Monitoring Aquatic and Terrestrial Environments, which was established at the behest of the U.S. Environmental Protection Agency. The boo...

Historically, ambient air (and perhaps water, soil, food, etc.) measurements were used to estimate the potential for human exposure to environmental pollutants based on various default assumptions. For instance, if a certain level of benzene was measured in the air, then a typ...

Ozone and particulate matter PM<SUB>2:5</SUB> are co-pollutants that have long been associated with increased public health risks. Information on concentration levels for both pollutants come from two sources: monitoring sites and output from complex numerical models that produce...

Two outbreaks of acute gastroenteritis were reported to the Wyoming Department of Health in 2001. The first was reported in February from recent vacationers of a snowmobile lodge. The second was in October among diners of a tourist saloon. The duration and type of symptoms exhibi...

A refined method of modeling atmospheric dust concentrations due to wind erosion was developed using real-time saltation flux measurements and ambient dust monitoring data at Owens Lake, California. This modeling method may have practical applications for modeling the atmospheric...

Bioassessment of non-wadeable streams in the U.S. is becoming more common, but methods for these systems are not as well developed as for wadeable streams. This problem was recognized by the U.S. Environmental Protection Agency (EPA) regional scientists as critical to their moni...

Bulk sediment toxicity tests are routinely used to assess the level and extent of contamination in natural sediments. While reliable, these tests can be resource intensive, requiring significant outlays of time and materials. The purpose of this study was to compare the results ...

We compare select aerosol Properties derived from the Community Multiscale Air Quality (CMAQ) model-simulated aerosol mass concentrations with routine data from the National Aeronautics and Space Administration (NASA) satellite-borne Moderate Resolution Imaging Spectro-radiometer...

There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field.

This study examined inter-analyst classification variability based on training site signature selection only for six classifications from a 10 km<SUP>2</SUP> Landsat ETM+ image centered over a highly heterogeneous area in south-central Virginia. Six analysts classified the image...

A comparison of multiple classifications of Landsat ETM+ satellite imagery comparing differences between classifications and the effect of this variability on land cover proportions.

During the Atlanta SuperSite Experiment, four particle mass spectrometers were operated together for the first time: NOAA's PALMS (Particle Analysis by Laser Mass Spectrometry), U. C. Riverside's ATOFMS (Aerosol Time-of-Flight Mass Spectrometry), U. Delaware's RSMS-II (Rapid Si...

Stream macroinvertebrate collection methods described in the Rapid Bioassessment Protocols (RBPs) have been used widely throughout the U.S. The first edition of the RBP manual in 1989 described a single habitat approach that focused on riffles and runs, where macroinvertebrate d...

Considering the many organizations which have published methods for monitoring contaminated sediments and the large number of documents on this subject, it can be a formidable task for a superfund project manager to find methods appropriate for his or her contaminated sediment si...