Final Site Information Package for National Remedy Review Board ...

SITE INFORMATION PACKAGE FOR NATIONAL REMEDY REVIEW BOARD
CONTENTS
2.3 Actions Completed at the Bunker Hill Superfund Site ........................................ B2-4
2.3.1 Remedial Actions.......................................................................................... B2-4
2.3.2 Studies and Investigations........................................................................... B2-5
2.4 Ongoing Data Collection Efforts.............................................................................. B2-6
3. Scope and Role of the FFS and ROD Amendment.......................................................... B3-1
3.1 Overview..................................................................................................................... B3-1
3.2 Scope of the Focused Feasibility Study................................................................... B3-2
3.3 Focused Feasibility Study Approach ...................................................................... B3-4
3.4 ROD Amendment ...................................................................................................... B3-5
4. Site Characteristics................................................................................................................. B4-1
4.1 Nature and Extent of Contamination...................................................................... B4-1
4.1.1 Sources and Locations of Mining Wastes.................................................. B4-1
4.1.2 Types of Contamination and Affected Media........................................... B4-3
4.2 Contaminant Fate and Transport............................................................................. B4-4
4.2.1 Surface Water Quality .................................................................................. B4-4
4.2.2 Groundwater Quality and Impact on Surface Water............................... B4-6
4.3 Summary of Site Conditions..................................................................................... B4-8
5. Current and Potential Future Site and Resource Uses.................................................... B5-1
5.1 Current Land Uses..................................................................................................... B5-1
5.2 Anticipated Future Land Uses ................................................................................. B5-1
5.3 Groundwater and Surface Water Use..................................................................... B5-2
6. Summary of Risks.................................................................................................................. B6-1
6.1 Human Health Risks ................................................................................................. B6-2
6.2 Identification of Contaminants of Concern............................................................ B6-2
6.2.1 Lead Risk Summary ..................................................................................... B6-2
6.2.2 Non-Lead Metals Risk Summary ................................................................ B6-3
6.3 Ecological Risks.......................................................................................................... B6-4
6.3.1 Identification of Contaminants of Potential Ecological Concern
and Possible Routes of Exposure................................................................ B6-5
6.3.2 Summary of Ecological Risk Assessment.................................................. B6-5
6.4 Basis for Remedial Action......................................................................................... B6-7
7. Remedial Action Objectives and Remediation Goals .................................................... B7-1
8. Description of Alternatives.................................................................................................. B8-1
8.1 Remedial Alternatives............................................................................................... B8-1
8.1.1 Remedial Alternatives for the Upper Basin Portion of OU 3 ................. B8-1
8.1.2 Remedial Alternatives for OU 2.................................................................. B8-4
8.1.3 Combined Remedial Alternatives for Upper Basin Portion
of OU 3 and OU 2.......................................................................................... B8-6
8.2 Remedy Protection Alternatives.............................................................................. B8-7
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