Section 1: Regulatory Context of the HRS

1. CERCLA: Comprehensive Environmental Response, Compensation, and Liability Act
2. The Hazard Ranking System
3. SARA: Superfund Amendments and Reauthorization Act
4. Hazardous Substances
5. HRS Definitions of Site and Source
6. CERCLA Definitions of Release
7. Statutory and Policy Exclusions
8. Policy Considerations in Listing Sites

Section 2: Site Assignment Process

1. Preliminary Assessment
2. Site Inspection
3. NPL Listing Process
4. Hazard Ranking System
5. HRS Scoring Package
6. The Documentation Record
7. Preparing the Documentation Record

Section 3: HRS Structure

1. Pathways
2. Site Score
3. Pathway Score
4. Likelihood of Release
5. Waste Characteristics
6. Targets

Section 4: Source Characterization

1. What is a Source?
2. Source Characterization
3. Source Identification Type
4. Source Boundaries and Dimensions
5. Hazardous Substance Source Association
6. Containment
7. Application to a Site

Section 5: Waste Characteristics

1. Calculating Substance-Specific Factors
2. Calculating Hazardous Waste Quantity
3. Calculating Waste Characteristics
4. Application to a Site

Section 6: Liklihood of Release

1. Observed Release
2. Potential to Release
3. Application to a Site

Section 7: Targets

1. Actual Contamination
2. Determining Level of Contamination
3. I and J Indices
4. Application to a Site

Section 8: GROUND WATER - Aquifers

1. Definitions
2. Identifying and Evaluating Aquifers

Section 9: GROUND WATER - Likelihood of Release

1. Definitions
2. Calculating Likelihood of Release
3. Potential to Release
4. Application to a Site

Section 10: GROUND WATER - Waste Characteristics and Targets

1. Waste Characteristics
2. Targets
3. Application to a Site

Section 11: SURFACE WATER - Likelihood of Release

1. Eligible Surface Water Bodies
2. Hazardous Substance Migration Path
3. Likelihood of Release
4. Application to a Site

Section 12: SURFACE WATER - Drinking Water Threat

1. Waste Characteristics
2. Targets
3. Actual Contamination
4. Potential Contamination

Section 13: SURFACE WATER - Human Food Chain Threat

1. Waste Characteristics
2. Documenting the Presence of a Fishery
3. Targets
4. Actual Contamination
5. Food Chain Individual
6. Food Chain Population
7. Estimating Fishery Production

Section 14: SURFACE WATER - Environmental Threat

1. Distinctive Features of the Threat
2. Selecting the Most Hazardous Substance for the Threat
3. Waste Characteristics
4. Targets: Sensitive Environments
5. Targets: Wetlands
6. Benchmarks and Levels of Contamination
7. Level of Contamination by Threat

Section 15: SURFACE WATER - Ground Water to Surface Water

1. Overview
2. Hazardous Substance Migration Path
3. Likelihood to Release
4. Waste Characteristics
5. Actual Contamination of Targets
6. Potential Contamination of Targets
7. Conclusion

Section 16: AIR - Likelihood of Release

1. Overview
2. Likelihood of Release

Section 17: AIR - Waste Characteristics and Targets

1. Waste Characteristics
2. Targets

Section 18: SOIL EXPOSURE - Resident Population Threat

1. Overview of the Pathway
2. Areas of Observed Contamination
3. Likelihood of Exposure
4. Waste Characteristics
5. Level of Contamination for Human Targets
6. Targets

Section 19: SOIL EXPOSURE - Nearby Population Threat

1. Overview of the Threat
2. Areas of Observed Contamination
3. Likelihood of Exposure
4. Waste Characteristics
5. Travel Distance for Nearby Targets
6. Nearby Targets

Section 20: Radionuclides

1. Radionuclide Exclusion
2. Likelihood of Release
3. Waste Characteristics
4. Targets