EPA has released the final 2005 National Emissions Inventory (NEI) as of March 18, 2009. The information is available via EPA's Emission Inventory FTP site. You may also use the FTP protocol software to access the files. The data for the 2005 NEI has been organized by inventory sector. The NEI documentation describing methodology for all inventory sectors is located in the folder "documentation." Each NEI folder includes a text file with the files names and description. The 2005 NEI will continue to be updated as noted in the file folder "general_inventory_information." at the link provided. Questions or comments about the documents can be directed to Egide Louis at 404-562-9240.
In June 2009, EPA released the results of its 2002 National-scale Air Toxics Assessment (NATA) of air toxics emissions. The purpose of the national-scale assessment is to identify and prioritize air toxics, emission source types and locations which are of greatest potential concern in terms of contributing to population risk. The 2002 NATA, along with its predecessors, the 1996 and the 1999 NATA are available on EPA's National Air Toxics Website. Questions or comments about the documents can be directed to Egide Louis at 404-562-9240.
EPA is pleased to announce the publication of Volume 3 of its Air Toxics Risk Assessment (ATRA) Reference Library. ATRA Volume 3 builds on the information presented in ATRA Volume 1 to describe how to evaluate and reduce cumulative air toxics risks at the local level. The document also presents readily available information on additional multimedia risk factors that may affect communities, and strategies to reduce those risks. The ATRA library, along with other EPA Office of Air risk resources can be accessed on our Fate, Exposure and Risk Analysis (FERA) website. The ATRA volumes should be maintained in three-ring binders to allow easy changeout of sections as updates occur (updates will be posted on the FERA website). Questions or comments about the documents can be directed to Dr. Ken Mitchell at 404-562-9065.
EPA Region 4 recently published a new guidance document called A Preliminary Risk-Based Screening Approach for Air Toxics Monitoring Data Sets. The purpose of this document is to provide a risk-based methodology for performing an initial screen of air toxics monitoring data sets in outdoor air. The application of this screening-level methodology by R4 State, local, and tribal air agencies will allow them to better address air toxics issues by focusing their limited resources for further analysis only on those geographic areas and chemicals for which the available data indicate potential for exposures of publichealth concern. The method may also provide a risk basis for a decision to continue (or not continue) a given monitoring effort. The guidance document can be found on the EPA Region 4 Air Toxics Health Information and Assessment Tools website. Questions or comments about the documents can be directed to Dr. Ken Mitchell at 404-562-9065.