NYC 9/11 Public Portal Document
•u
Peer Review Draft (September, 2002)
Table of Contents
Introduction 4
Selecting the Contaminants of Potential Concern (COPCs) ................ 4
Lead and Combustion By-Products (PAHs, Dioxin)................ 5
Lead............................................................................ 5
PAHs ............................................................................ 6
Dioxin ........................................................................ 6
Building Materials (Asbestos, Fibrous Glass, Crystalline Silica) 6
Asbestos........................................................................ 7
Fibrous Glass................................................................ 7
Crystalline Silica .......................................................... 7
Other Substances that Were not Selected to be COPCs............ 9
Setting Benchmarks for the Contaminants of Potential Concern (COPCs).......... 10
Developing Risk-Based Criteria for Indoor Air..................................... . 11
Developing Risk-Based Criteria for Settled Dust ............................. . . . 13
Developing Benchmark Levels Based on Occupational Health Standards 15
References 27
APPENDIX A
Hazardous Substances Not Included in Indoor Environment Sampling Program 1
APPENDIX B
World Trade Center Health Effects Screening Criteria for Ambient Air 1
APPENDIX C
Basis for Tier III screening level of 1 E-04 1
APPENDIX D
Assessing Exposures to Indoor Air and to Residues on Indoor Surfaces 1
APPENDIX E
lEUBK Model Results for Lead in Air 1
CITY_21MC100_002452154
NYC-WTC_000199583
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