Science/Technical document

To FACA/ANPR:

Attached are files/hard copy of ANPR/FACA science draft. File listings are provided; many are very large and may require further disaggregation and compression.

Sections requiring significant work (all sections require work):

- Monitoring methods

- special studies descriptions

- primary particles (processes and related modeling)

- meterological processes

- transport

Thanks for everyone inside and outside EPA for contributions and responsiveness.

Rich Scheffe

Table of Contents

Section	Page	File
1. Introduction

2. Air Quality Characterizations

2.1 Ozone

2.2 Particulate Matter

2.3 Visibility

3. Processes and linkages

3.1 Ozone

3.2 Secondary Fine Particles

3.3 Linkages

3.4 Primary particles

3.5	Visibility

3.6	Deposition [toxics-nitrogen-acids]

3.7 Aerosol/deposition effects on gas chemistry

3.8	Monitoring/modeling comparison dilemma

3.9	Meteorological Processes

3.10	Transport

4. Monitoring, Emissions and Modeling Tools

4.1 Monitoring Networks and Methods

4.1.1 Ozone

4.1.2 PM

4.1.3 Visibility

4.2 Emissions

4.2.1 Ozone precursors

4.3.2 PM an precursors

4.3.3 Trends summary

4.3 Models and special studies	1-1

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1.	INTRODUCTION

Emerging air quality management control policies for ozone, particulate matter (PM) and regional haze (RH) rely on technical information and scientific knowledge gleaned from many diverse sources. An increasing amount of interaction among a diverse community of air quality professionals accompanies any effort toward integrating programs across pollutants. Compounding the differences among programs and specialties is the overriding motivation to undestand similarities and overlaps to optimize technical resources and identify windows of opportunity for succesful integrated air quality management. The objective of this document is to estabalish a common reference frame for the technical information and methodologies underpinning implementation programs to improve subsequent dialogues addressing program integration and accompanying science-policy interface issues. This document does address health and ecosystem effects and emission control technologies.

The FACA science and technology workgroup is developing in parallel a more comprehensive "conceptual model" which will address the state-of-the-science pertaining to integrated pollutant implementation. This document adopts the basic outline used in the FACA model and is organized by descriptions of the:

•	Existing environmental state (through summaries of measured air quality data),

•	Physical/chemical phenomena to characterize air quality, and

•	scope of monitoring, modeling/analysis and emission inventory programs to characterize and predict air quality phenomena,

The information presented here is reference oriented, as it covers a very broad scope of topics but provides direction and insight to the major national programs and special field studies/programs which collectively form the technical foundation for ozone/PM/haze programs. This version does not adequately address many of the technical issues of concern, given the initial focus on providing a common understanding of the major programs - a prerequisite for serious and informed dialogue on issues. To that end, much of the focus of the FACA STWG will be directed toward a full exploration of the what is known, and what is not known with an objective assessment of uncertainty attendant in the data and tools used for analysis. Accordingly, suggestions regarding additional information sources, topics and issues requiring attention and technical corrections are strongly encouraged and will be considered in future documents submitted to the docket by the FACA science and technology workgroup. Also, many liberties have been taken in describing model studies, data bases and other subjects. Please accept apologies a priori for mischaracterizations, omissions and so forth. Feedback in these areas is critical for providing a useful reference document and crediting those responsible for the technical and scientific work supporting air quality programs.