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

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7. Remedial Action Objectives and Remediation Goals Remedial action objectives (RAOs) and general response actions (GRAs) for the Upper Basin are presented in this section. Section 300.430(e)(2)(i) of the NCP specifies that RAOs be developed to address COCs, media of concern, potential exposure pathways and remediation goals. The RAOs that were developed for the FFS Report (USEPA, 2010) are presented below. The RAOs provide a basis for evaluating the capability of the response actions to achieve compliance with potential ARARs or an intended level of risk protection. Examples of GRAs considered in the FFS Report for human health and ecological protection include containment, treatment, removal, and disposal and are presented with the RAOs below. Human Health Subject Remedial Action Objective(s) Soil/Sediments/Source Material Reduce human exposure to soil, sediments, and source material, including residential garden soil, that have concentrations of COCs greater than selected risk-based levels for soil. Surface Water Restore surface water designated as beneficial use for drinking water to meet drinking water and water quality standards. Prevent ingestion of surface water used as drinking water and containing COCs exceeding drinking water standards and associated risk-based levels for drinking water. Groundwater and Surface Water as Drinking Water Prevent discharge of seeps, springs, and leachate that would cause surface water to exceed drinking water and water quality standards. Prevent human ingestion of groundwater withdrawn or diverted from a private, unregulated source, used as drinking water, and containing COCs exceeding drinking water standards and associated risk-based levels. Aquatic Food Sources Reduce human exposure to unacceptable levels of COCs via ingestion of aquatic foods (e.g., fish and waterfowl) General Response Action(s) Containment Removal Disposal Source Control Hydraulic Isolation Treatment Removal for Treatment Source Control Hydraulic Isolation Containment Withdrawal Prohibitions (Institutional Controls) Source Control B7-1
SITE INFORMATION PACKAGE FOR NATIONAL REMEDY REVIEW BOARD PART B, SECTION 7: REMEDIAL ACTION OBJECTIVES AND REMEDIATION GOALS Subject Remedial Action Objective(s) Ecological Receptors Ecosystem Physical Structure and Function Soil/Sediments/Source Material Remediate soil, sediments, and surface water to mitigate mining impacts and provide habitat capable of supporting a functional ecosystem for the aquatic and terrestrial plant and animal population in the Upper Basin. Maintain (or provide) soil and sediment quality capable of supporting a functional ecosystem for waterfowl and riparian songbirds in the Upper Basin. Maintain (or provide) soil, sediment, and surface water quality supportive of individuals of specialstatus biota that are protected under the ESA, the Fish and Wildlife Conservation Act, and the Migratory Bird Treaty Act. Prevent ingestion or uptake of and dermal contact with arsenic, cadmium, copper, lead, mercury, silver, and zinc by ecological receptors at concentrations that result in unacceptable risk. Reduce loadings and prevent transport of arsenic, cadmium, copper, lead, mercury, silver, and zinc from soil and sediments into surface water and groundwater to concentrations below applicable ARARs. Surface Water Prevent ingestion of surface water with cadmium at a concentration that may cause adverse impacts on bull trout. Mine Water, including Adits, Seeps, Springs, and Leachate Prevent ingestion or uptake of arsenic, cadmium, copper, lead, mercury, and zinc by humans, birds, mammals, aquatic invertebrates and fish, aquatic plants, and amphibians at concentrations that exceed applicable AWQC or state water quality standards, including site-specific criteria that will protect designated and existing beneficial uses. Prevent discharge of arsenic, cadmium, copper, lead, mercury, silver, and zinc to surface water at concentrations that exceed surface water quality ARARs. Groundwater Prevent discharge of arsenic, cadmium, copper, lead, mercury, silver, and zinc in groundwater to surface water at concentrations that exceed surface water quality ARARs. General Response Action(s) Containment Treatment Removal Disposal Containment Treatment Removal Disposal Containment Treatment Removal Disposal Treatment Containment Treatment Removal Disposal Attainment of the RAOs would reduce short- and long-term risks posed to human health and ecological receptors by reducing exposure to and contact with (ingestion of) contaminated soil, sediments, and surface water. The PRGs for human health, environmental media, and aquatic receptors in the Upper Basin are presented in Files B7-1 B7-2
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United States Environmental Protect
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Contents Acronyms and Abbreviations
Page 5 and 6: SITE INFORMATION PACKAGE FOR NATION
Page 9 and 10: Acronyms and Abbreviations µg/dL m
Page 11 and 12: RAO remedial action objective RI/FS
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Page 49 and 50: 6. Summary of Risks The Bunker Hill
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Page 59 and 60: 8. Description of Alternatives The
Page 65 and 66: Remedial Alternative Description SI
Page 85 and 86: 12. Potential Applicable or Relevan
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Page 95 and 96: Dan Opalski, U.S. EPA March 10,2010
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SITE INFORMATION PACKAGE FOR NATION
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Rose Lake ll n e §¨¦ 90 DUDLEY "
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1992-1994 Removal of tailings and c
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The box plot shows the median or 50
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! ( ! ! ( ! ! ! Upper Basin Coeur d
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DUDLEY ") §¨¦ 90 ") St Joe River
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Base Map Data: NHDPlus (Rivers, Wat
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[Two Updated Updated Woodland Ecolo
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Ninemile Creek WALLACE BUNN Upper B
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OSBURN §¨¦ 90 Upper Basin Coeur
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176 E Upper Basin Coeur d'Alene Riv
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§¨¦ 90 ENAVILLE The Bunker Hill
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E 169 §¨¦ 90 Upper Basin Coeur d
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TABLE B2-1 Summary of Ongoing Data
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TABLE B4-2 Screening Level Exceedan
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TABLE B7-1 Preliminary Remediation
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TABLE B8-1 Descriptions of Typical
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TABLE B8-2 Summary of Alternatives
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TABLE B9-1a Comparative Analysis of
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TABLE B9-1b Comparative Analysis of
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TABLE B11-1 Legend of Bureau of Lan
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TABLE B11-1 Legend of Bureau of Lan
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TABLE B11-2 Summary of Estimated Po
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TABLE B11-4 Summary of Remedy Prote
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TABLE B14-1 Estimated Costs Summari
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TABLE B14-2 Summary of Estimated Co
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TABLE B14-2 Summary of Estimated Co
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