Air Toxics Research Strategy

By Environmental Protection Agency

Description
Excerpt: The EPA’s Office of Research and Development (ORD) has developed a draft Air Toxics 5 Research Strategy (ATRS). This strategy was developed to assist in improving our 6 understanding of air toxics and to manage effectively and efficiently our resources for air toxics 7 research. 8 9 National Air Toxics Assessments 10 The ATRS is needed to address the uncertainty in EPA’s National Air Toxics Assessments 11 (NATA). As explained in Chapter 1, these assessments will be used in a number of ways. They 12 will be used in characterizing the residual risks remaining after implementation of the 13 technology-based standards for sources of air toxics. The assessments also will be used to better 14 understand the risks in urban areas, including risks from mobile sources, and the risks associated 15 with indoor air toxics. They also will be used in characterizing the overall air toxics problem 16 and measuring progress towards EPA’s program goals, through national-scale assessments. 17 Currently, EPA’s initial national-scale assessment under NATA is beginning peer review.

Table of Contents
Table of Contents Page List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi Authors, Contributors, and Reviewers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x EXECUTIVE SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1. INTRODUCTION AND RATIONALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 WHAT ARE “AIR TOXICS”, AND WHAT RISKS DO THEY POSE? . . . . . . . . . . 5 1.2 EPA’S TRANSITION TO A RISK-BASED AIR TOXICS PROGRAM . . . . . . . . . . 7 1.3 HOW WILL ORD’S AIR TOXICS RESEARCH SUPPORT THE RISK-BASED PROGRAM? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.4 RISK ASSESSMENT-RISK MANAGEMENT FRAMEWORK FOR AIR TOXICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.4.1 Source Characterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 1.4.2 Fate, Transport, and Transformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.4.3 Personal Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1.4.4 Target Tissue Dose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 1.4.5 Hazard Identification and Dose-Response Assessment . . . . . . . . . . . . . . . . . 16 1.4.6 Risk Characterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1.4.7 Risk Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1.5 WHAT IS THE SCOPE OF THIS STRATEGY? . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2. THE STRATEGY FOR AIR TOXICS RESEARCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2.2 STRUCTURE OF THE ATRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2.3 STRATEGIC PRINCIPLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.4 SELECTION OF AIR TOXICS GROUPS AND POTENTIAL PRIORITY HAPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2.4.1 Factors Relevant to Exposure, Health, and Risk Characterization and Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2.4.2 Grouping HAPs by Chemical Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 2.4.3 Priority HAPs by Program Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 2.4.4 Identification of Priority HAPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 3. THE STRATEGIC APPROACH APPLIED TO POLYCYCLIC ORGANIC MATTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3.2 PRIORITY RESEARCH FOR POM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 4. IMPLEMENTATION AND OUTCOMES OF THE ATRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Book Id: WPLBN0000016416
Format Type: PDF eBook
File Size: 429.08 KB
Reproduction Date: 2007
Full Text

Title:

Air Toxics Research Strategy

Author:

Environmental Protection Agency

Volume:

Language:

English

Subject:

Ecology, Natural resource issues, Environemtal protection

Collection:

Environmental Awareness Library Collection

Subcollection:

Historic
Publication Date:

Publisher:

U.S. Environmental Protection Agency

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