Network Plan - Not a new requirement [40 CFR 58.10(a)] Due every year Simple accounting of changes expected for that year Network Assessment – Once every 5 years Detailed evaluation of networks and objectives

Required by new monitoring rule [40 CFR Part 58.10(d)] Once every 5 years First assessment due July 1, 2010 EPA guidance document m25/datamang/network-assessment- guidance.pdf

Topography Climate Population Demographic trends Major emissions sources Current air quality conditions

demographic shifts, density or sparseness of existing networks, New findings on health impacts Political factors

GIS Simple displays can be made using GoogleEarth or Google Maps. Statistical software and database packages allow you to organize, manipulate, create, analyze, and display data. These packages include Microsoft Excel and Access, and tools from ITEP/TAMS

EPA AirData offers yearly summaries of U.S. air pollution data extracted from EPA's air pollution databases. Includes emissions and ambient monitoring. EPA AIRNow-Tech offers AIRNow observational data. Navigator tool is a customizable, air quality GIS tool that allows you to display site information with multiple geographic, pollutant, and meteorological features. Data tool allows you to create personalized site lists, access predefined queries, and download AIRNow observational data.