Human and Ecological Risk Assessment - Earthjustice

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Appendix LTime to Peak Concentration at Receptor Wellsurface impoundments, plots are provided on both the full 0 to 10,000-year time frame and ashorter time frame, so that the shape of the cumulative distribution can be seen for the lowertime-of-travel range characteristic of these facilities.The figures are organized alphabetically by metal, and there are three figures for eachmetal: landfills, surface impoundments (0–10,000 years), and surface impoundments (shortertime frame).The shorter arrival times for clay-lined landfills compared to unlined landfills are anartifact of the fact that liners were modeled at each landfill as reported in the EPRI survey, andeach landfill location has a different subsurface geology. The shorter arrival times mainly reflectmore transmissive soils and aquifer materials at the clay-lined facility locations.10090807060Percentile50403020No LinerClay LinerComposite Liner1000 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000Time to Peak Concentration (years)73% of composite liner results have no infiltration and are not plotted on this graph.Figure L-1. Time to peak distribution for arsenic III: landfills, all waste types.April 2010–Draft EPA document. L-3
Appendix LTime to Peak Concentration at Receptor Well10090807060Percentile50403020No LinerClay LinerComposite Liner1000 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000Time to Peak Concentration (years)35.6% of composite liner results have no infiltration and are not plotted on this graph.Figure L-2. Time to peak distribution for arsenic III: surface impoundments, all wastetypes, full 10,000 year time frame.10090807060Percentile504030No LinerClay Liner201000 500 1000 1500 2000 2500 3000 3500 4000 4500Time to Peak Concentration (years)35.6% of composite liner results have no infiltration and are not plotted on this graph.Figure L-3. Time to peak distribution for arsenic III: surface impoundments, all wastetypes, shorter time frame.April 2010–Draft EPA document. L-4
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This draft document has been prepar
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CCWTable of ContentsTable of Conten
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CCWTable of ContentsList of Figures
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CCWTable of Contents4-22. Summary o
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CCWList of AcronymsAcronymDefinitio
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CCWList of AcronymsApril 2010-Draft
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Executive SummaryHuman and Ecologic
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Section 1.0Introduction1.0 Introduc
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Section 1.0Introduction1.3.2 Exposu
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Section 1.0IntroductionThis methodo
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Section 1.0Introduction1.4 Document
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Section 2.0Problem Formulationdata
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Section 2.0Problem FormulationTable
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Section 2.0Problem Formulationsmall
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Section 2.0Problem FormulationFigur
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Section 2.0Problem Formulationonsit
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Section 2.0Problem Formulation2.3 S
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Section 2.0Problem Formulationand C
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Section 2.0Problem Formulationof dr
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Section 3.0Analysisscale analysis.
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Section 3.0Analysis• The RfD is a
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Section 3.0Analysis3.1.2 Ecological
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Section 3.0AnalysisEcological Risk
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Section 3.0Analysisfor the screenin
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Section 3.0AnalysisTable 3-5. Scree
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Section 3.0Analysisapproximately 30
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Section 3.0Analysisthose input file
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Section 3.0AnalysisCCW Waste TypesC
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Section 3.0Analysis• An in-depth
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Section 3.0Analysisused to determin
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Section 3.0Analysisconsolidation. A
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Section 3.0Analysis3.4.4 Model Outp
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Section 3.0Analysisclogged region o
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Section 3.0Analysissurface impoundm
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Section 3.0Analysisobtained from a
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Section 3.0AnalysisIn the saturated
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Section 3.0Analysis• The receptor
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Section 3.0Analysissediment and por
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Section 3.0AnalysisTable 3-11. Alum
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Section 3.0Analysischild was aged f
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Section 3.0Analysisa per kilogram b
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Section 3.0AnalysisNoncancer risk w
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Section 4.0Risk Characterization4.0
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Section 4.0Risk CharacterizationNot
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Section 4.0Risk CharacterizationEPA
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Section 4.0Risk CharacterizationEco
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Section 4.0Risk Characterization•
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Section 4.0Risk Characterization•
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Section 5.0ReferencesFinkelman, R.B
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Section 5.0ReferencesU.S. EPA (Envi
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Section 5.0Referenceshttp://www.epa
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Section 5.0ReferencesDisposal of Co
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Appendix AConstituent DataA.1 Data
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Appendix AConstituent DataA.2.1 Sel
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Appendix AConstituent Data2. Select
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Appendix AAttachment A-1: Sources o
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Appendix AAttachment A-2: CCW Const
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Appendix A Attachment A-3Table A-3-
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Appendix A Attachment A-3Cr IIIHgAg
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Appendix A Attachment A-3NO3CNCd, C
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Appendix BWaste Management UnitsWas
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Appendix BWaste Management Units•
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Appendix BWaste Management Units(e.
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Log(capacity, cubic yards)Log(area,
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Appendix BWaste Management UnitsB.7
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Appendix BAttachment B-1: CCW Dispo
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Appendix BAttachment B-1: CCW Dispo
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Appendix BAttachment B-2: CCW WMU D
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Appendix CSite DataWMU and the wate
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Appendix CSite DataFigure C-1. Exam
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Appendix CSite Dataeach site, eithe
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Appendix CSite DataBecause EPACMTP
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Appendix CSite DataHydrogeologic Se
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Appendix CSite DataFigure C-2. EPAC
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Appendix CSite DataEPACMTP Climate
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Appendix CSite DataRF1 Reach Types
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Appendix CSite DataTable C-9. Regio
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Appendix CSite DataHydrologicRegion
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Appendix CSite DataClawges, R.M., a
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Appendix CAttachment C-1: Soil Data
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Appendix CAttachment C-3: Climate C
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Appendix CAttachment C-4: Waterbody
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Appendix DMINTEQA2 Nonlinear Sorpti
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Appendix EEquationsIf Cwctot > Csol
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Appendix EAttachment E-1: Surface W
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Page 349 and 350: Appendix EAttachment E-1: Surface W
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Page 355 and 356: Appendix FHuman Exposure Factorswer
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Page 367 and 368: Appendix GHuman Health BenchmarksG.
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Page 373 and 374: Appendix HEcological BenchmarksRisk
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Page 381 and 382: Appendix ICalculation of Health-Bas
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Page 389 and 390: Appendix JChemical-Specific Inputs
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Page 393 and 394: Appendix KScreening Analysis Result
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