Example Projects:

U.S. EPA Projects


E&S Environmental Chemistry works with the U.S. Environmental Protection Agency (EPA) nationwide, and our project list is extensive. Listed below are some example projects that we are either currently working on or have recently completed for the EPA. Please contact us for more information.

EMDS Decision Support Modeling

E&S Environmental Chemistry, Inc., working together with the U.S. Environmental Protection Agency (EPA) and U.S. Forest Service (USFS), is developing a decision-support system for modeling critical loads of atmospheric sulfur (S) deposition in the southeastern United States. The spatial coverage of the study region includes the Ridge and Valley and Central Appalachian ecoregions in Virginia and West Virginia and the Blue Ridge Ecoregion in Virginia, West Virginia, North Carolina, and Tennessee. The system integrates geographic information with logic- and decision-modeling technologies to provide a spatial analysis system for data management and environmental risk assessment.

The final report can be downloaded here.

Ecosystem Services

Ecosystem Services are the benefits to humans provided by nature. A critical load of human-caused pollution is the loading of a given pollutant above which an ecosystem is expected to experience biological harm. Natural resource managers and public policy representatives can use these two paradigms to more effectively manage and regulate the environmental effects of pollutants across the United States. E&S Environmental Chemistry developed a conceptual approach for blending the ecosystem services and critical load approaches. A case study was conducted in the Appalachian mountain region of Pennsylvania, Virginia, and West Virginia.

The final report can be downloaded here.


National Ambient Air Quality Standards (NAAQS)

E&S Environmental Chemistry was contracted by the U.S. Environmental Protection Agency (EPA) to draft an Integrated Science Assessment, together with associated annexes, on the current state of scientific understanding regarding eutrophication and acidification effects of atmospheric deposition of oxides of nitrogen (N) and sulfur (S). These air pollutants are produced mainly by the burning of fossil fuels for energy development and transportation. Annexes were drafted on topics such as acidification (terrestrial and aquatic), nutrient enrichment, critical loads, materials effects, and economic valuation. The work was done by E&S with input from a group of topic area experts from the U.S. Geological Survey, academia, and private industry. The resulting draft report in support of considering revisions to the National Ambient Air Quality Standards for oxides of S and N was reviewed, revised and modified by EPA and published as an EPA report in December, 2008.

The final report is available for downloading from the U.S. EPA website.

2007 National Lake Survey

Minimally disturbed lakes were determined from available GIS data (e.g., land use, roads, aerial photography) for comparative use in a national survey of lake health. A series of maps was Ugenerated for each candidate reference lake and analyzed for evidence of disturbance. Reference lakes were selected for sampling and used for comparative analysis in EPA’s 2007 National Lake Survey.