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Evaluating Air Quality Progress: Milestone Assessments and Strategic Adjustments

This document outlines the structured approach for evaluating air quality improvements at predetermined milestone years after the implementation of air quality plans. It includes assessing air quality against National Ambient Air Quality Standards (NAAQS), determining if mid-course corrections are necessary, and identifying necessary emission reduction targets. The process involves a detailed analysis of air quality indicators, the development of control strategies, and contingency measures to ensure compliance and progression towards clean air attainment. Continuous monitoring and adjustments aid in addressing emission reductions effectively.

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Evaluating Air Quality Progress: Milestone Assessments and Strategic Adjustments

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  1. At predetermined periods after implementation (i.e., milestone years), evaluate air quality against NAAQS 3 Determine reason; is a mid-course correction needed? Redesignation/ maintenance plan Attainment achieved? 6 • Determine if area met the RFP targets: • administrative test • emission reduction test • (+ = pass test) • (- = fail test) Assess available air quality indicators -- are they consistent with RFP test results? Determine reason; catch up on emission reductions or trigger contingency 4d Catch up on implementation; trigger contingency; penalties 4c • SIP Development • model to identify emission reductions needed for each pollutant • identify air quality indicators that can be used to help select • emission reductions targets • determine control strategy options • consider technical feasibility, cost-effectiveness, public acceptance • select optimal strategy and complete attainment demonstration • identify RFP targets for administrative/emission reduction tests • develop contingency measures (as available) Pre-SIP RFP Activities Iterative Process for Reasonable Further Progress Toward Attainment SIP Implementation 2 1 Yes No Yes No + administrative + emission reduction Continue implementation; rewards? 4a Yes No - administrative + emission reduction 4 Catch up on implementation 4b 5 + administrative - emission reduction - administrative - emission reduction 7/16/97

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