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Page 538

Table Of Contents

DISCLAIMER

537

FIGURES

539

TABLES

539

1.0

Introduction

540

 

1.1

 

Background and Purpose

540

 

1.2

 

Risk Assessment in Title III

541

 

1.3

 

Overview of Document

544

 

1.4

 

General Modeling Requirements

545

2.0

   

Tier I Analyses

549

 

2.1

 

Introduction

549

 

2.2

 

Long-term Modeling

549

   

2.2.1

Maximum Annual Concentration Estimation

550

   

2.2.2

Cancer Risk Assessment

552

   

2.2.3

Chronic Noncancer Risk Assessment

553

 

2.3

 

Short-term Modeling

554

   

2.3.1

Maximum Hourly Concentration Estimation

554

   

2.3.2

Acute Hazard Index Assessment

557

3.0

   

Tier 2 Analyses

558

 

3.1

 

Introduction

558

 

3.2

 

Long-term Modeling

558

   

3.2.1

Maximum Annual Concentration Estimation

558

   

3.2.2

Cancer Risk Assessment

560

   

3.2.3

Chronic Noncancer Risk Assessment

561

 

3.3

 

Short-term Modeling

562

   

3.3.1

Maximum Hourly Concentration Estimation

562

   

3.3.2

Acute Hazard Index Assessment

563

4.0

   

Tier 3 Analyses

564

 

4.1

 

Introduction

564

 

4.2

 

Long-term Modeling

564

   

4.2.1

Maximum Annual Concentration Estimation

565

   

4.2.2

Cancer Risk Assessment

567

   

4.2.3

Chronic Noncancer Risk Assessment

568

 

4.3

 

Short-term Modeling

569

   

4.3.1

Maximum Hourly Concentration Estimation

570

   

4.3.2

Acute Hazard Index Assessment

572

5.0

   

Additional Detailed Analyses

575

6.0

   

Summary of Differences Between Modeling Tiers

576

     

References

577

Appendix A - Electronic Bulletin Board Access Information

579

Appendix B - Regional Meteorologists/Modeling Contacts

580



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