John Egan, ALL4's Technical Director, attended the NCASI Northern Regional meeting in Portland, Maine on May 12 - 13. John gave a timely presentation regarding a Mill PSD permitting project that experienced the immediate impacts of the new 1-hour NO2 NAAQS that took effect on April 12. John also attended the Northern Regional Committee meeting after being selected by NCASI as a new member of that planning group.
Modeling for NAAQS Part 2: How to select the appropriate output for SO2
The U.S. National Ambient Air Quality Standards (NAAQS) for 1-hour SO2, 1-hour NO2, and 24-hour PM2.5 use a very particular format. It is very important for all modelers (both within and outside of the U.S.) to understand how AERMOD handles this. In particular, U.S. users need to be familiar with the special tools available to help them analyze these results, and non-U.S. modelers (or anyone using AERMOD for a purpose other than the U.S. NAAQS standards) need to know how to disable AERMOD`s U.S. NAAQS-specific...
Environmental and economic goals not in conflict, new study claims
New research claims that air pollution policy reduces the extent to which population growth in urban areas results in increased pollution emissions, without disrupting the economic growth resulting from this urbanisation. More than half of the world’s population currently lives in urban areas, and the United Nations predicts another 2.5 billion people will move to cities by 2050. However, the exact relationship between population growth and pollution increase is still unknown. This in turn causes problems...
EPA Approves Iowa’s State Implementation Plan for Reducing Particulate Matter in Muscatine’s Air
The U.S. Environmental Protection Agency (EPA) has approved Iowa’s state implementation plan (SIP) to reduce fine particle emissions in Muscatine County. The Clean Air Act requires states to develop plans to attain and maintain the national air standards in all areas of the state. These plans, known as SIPs, are developed by state and local air quality management agencies and submitted to EPA for approval. Because the Muscatine area has struggled with consistently attaining the fine particulate matter...
BREEZE AERMOD 7.4 Enhancements Streamline U.S. NAAQS Modeling
BREEZE®, the market-leading air dispersion modeling software used by environmental professionals around the world, released a new version of its AERMOD air dispersion modeling software. This new version includes the updated 11353 U. S. EPA executable that addresses recently defined NAAQS standards, namely for NO2 and SO2 daily maximum concentrations. Streamline NO2, SO2, and PM2.5 modeling for U.S. NAAQS with Version 7.4 new features that: Integrate the U.S. EPA version 11353 released December 19,...
Final clean air permit issued for pioneer valley facility in Westfield, Mass.
EPA has issued a final Clean Air Act permit to the Pioneer Valley Energy Center for the construction and operation of a new 431 MW/hr combined cycle gas turbine in Westfield, Mass. The permit is designed to prevent the significant deterioration of air quality resulting from the plant’s operation. The federal Clean Air Act requires new major sources of air pollutants in areas which currently meet air quality standards to obtain a “Prevention of Significant Deterioration” (PSD) air permit prior...