Standard Operating Procedure Preparing Air Quality Statements

The purpose of this standard operating procedure (SOP) is to explain how to prepare comprehensive project specific air quality statements for inclusion in the project file or environmental review document. This SOP affects projects that are developed by or for review by the Texas Department of Transportation (TxDOT) Environmental Affairs Division (ENV) for roadway/highway projects, including Federal Highway Administration (FHWA)/ Federal Transit Administration (FTA) projects. Certain air quality information needs to be documented in the project file and/or addressed in the air quality section of an environmental review document. The air quality elements that must be addressed for every project are: conformity including hotspot analyses; carbon monoxide (CO) traffic air quality analysis (TAQA); mobile source air toxics (MSAT); Congestion Management Process (CMP); and construction air emissions. However, the specific documentation for each element varies based on project specifics. This SOP is intended to assist project sponsors identify, customize, and document the specific language for any given project, resulting with a project-specific statement that address all the air quality elements.