US EPA TTNWeb Brochure
EPA-456/F-98-003 July 1998 (PDF file)
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What is the TTN?

The Technology Transfer Network (TTN) is a collection of technical Web sites containing information about many areas of air pollution science, technology, regulation, measurement, and prevention. In addition, the TTN serves as a public forum for the exchange of technical information and ideas among participants and EPA staff.

What Sites Are on TTNWeb?

AQS- This Air Quality System (AQS) technical area is designed primarily for AQS users (state, tribal and local agency management, EPA Regional Offices, consultants, and environmental group.) It provides information about the use of the AQS application, software downloads, file formats, background project information, and events of special interest to personnel working with data for the AQS.		FERA- The tools found on this website, which include EPA's Total Risk Integrated Methodology, will assist with the Environmental Protection Agency’s efforts to evaluate the health risks and environmental effects associated with exposure to “criteria” (six common air pollutants including ozone and particles) and toxic air pollutants.
AMTIC- The Ambient Monitoring Technology Information Center contains information and files on ambient air quality monitoring programs, details on monitoring methods, relevant documents and articles, information on air quality trends and nonattainment areas, and federal regulations related to ambient air quality monitoring.		GEI- The Geographic/Ecosystems Initiatives are geographically focused environmental activities which leverage the resources of states, local governments, regulated communities, environmental groups, and citizens.
ATW- The Air Toxics Web site is a Web site for Federal/State and local air toxics programs and central repository for air toxics information.		NAAQS- The National Ambient Air Quality Standards (NAAQS)deals with six principal pollutants, which are called "criteria" pollutants. They are: Ozone (O3); Particulate Matter (PM); Carbon Monoxide (CO); Sulfur Dioxide (SO2);Nitrogen Oxides (NOx); and Lead (Pb)
CATC- The Clean Air Technology Center serves as a resource for all areas of emerging and existing air pollution prevention and control technologies, and provides public access to data and information on their use, effectiveness, and cost. CATC includes RACT/BACT/LAER Clearinghouse (RBLC).		NEET- NEET is now open to technology providers for data entry. Once data entry is complete, NEET will be reference resource for new and emerging technologies for improving air quality. Information is entered by the technology owner or developer. The NEET is being developed and operated by RTI International under a cooperative agreement with the U.S. EPA, Office of Air Quality Planning & Standards, Integration Transfer & Program Integration Division, to complement the RACT/BACT/LAER Clearinghouse (see CATC/RBLC site on the TTN).
CHIEF- The ClearingHouse for Inventories and Emission Factors contains the latest information on emission inventories and emission factors. It provides access to the latest information and tools for estimating emissions of air pollutants and developing air emission inventories.		NELAC- The National Environmental Laboratory Accreditation Conference promotes acceptable performance standards for the operation of environmental laboratories.
CICA- The U.S. - Mexico Information Center on Air Pollution (Centro de Información sobre Contaminación de Aire-CICA) provides technical support and assistance in evaluating air pollution problems along the U.S.-Mexico border. CICA is sponsored by the EPA’s Clean Air Technology Center (CATC).		NSR- The New Source Review (NSR) Web site is designed to provide material and information pertaining to NSR permitting.
ECAS- The Innovative Strategies and Economics Group conducts analyses of costs, benefits, and economic and regulatory impacts of air quality management strategies, programs, and regulations developed throughout the Office of Air Quality Planning and Standards (OAQPS).		OARP&G;- The OAR Policy and Guidance Web site is designed to provide access to rules, policy, and guidance documents produced by the US EPA Office of Air and Radiation (OAR).
EMC- The Emission Measurement Center provides access to emission test methods and testing information for the development and enforcement of national, state, and local emission prevention and control programs.		SBAP- The Small Business Assistance Program has been developed to help state and EPA small business assistance programs share information about their materials and activities.
FACA- Under the provisions of the Federal Advisory Committee Act (FACA), EPA formed an advisory committee to obtain advice and recommendations on integrated approaches for implementing revised national ambient air quality standards (NAAQS) for ozone and particulate matter.		SCRAM- The Support Center for Regulatory Air Models is a source of information on atmospheric dispersion (air quality) models that support regulatory programs required by the Clean Air Act.