This document provides guidance on how to develop emission inventories to meet State Implementation Plan (SIP) requirements for complying with the 8-hour ozone national ambient air quality standard (NAAQS), the revised particulate matter (PM) NAAQS, and the regional haze regulations. It is intended for use by the EPA Regional Offices; State, local and Tribal air quality management authorities; and the general public. The guidance is designed to implement national policy on these issues.
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