Human and Ecological Risk Assessment - Earthjustice

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Appendix ICalculation of Health-Based Numbers (HBNs) for CCW Constituent ScreeningTable I-6. Daily Intake of Contaminant from Consumptionof Drinking Water (mg/kg BW/day)IdwIdwCdwCrdwFdwBWName Description Value1000 Conversion factor (mL/L)Cdw Concentration of contaminant in drinking water (mg/L) Set equal to 1 for HBN calculationBW Body weight (kg) Age-cohort-specific (Table I-9)CR_dw Consumption rate of water (L/day) Age-cohort-specific (Table I-9)F_dw Fraction of drinking water ingested that is contaminated (unitless) 1 (protective value)Source: U.S. EPA, 1998a.Table I-7. Cancer Risk and Hazard Quotient Due to Ingestion (unitless)Risk_OralHQ OralIRfDRiskOralI ED EF CSFAT 365OralName Description Value365 Conversion factor (days/yr)I Intake rate from fish or drinking water (mg/kg/day) Calculated (Tables I-5 and I-6)CSF Oral Oral cancer slope factor (mg/kg/day)-1 Chemical-specific (see Appendix G)RfD Noncancer reference dose (mg/kg/day) Chemical-specific (see Appendix G)AT Averaging time (yr) 70 (U.S. EPA, 1991)ED Exposure duration for oral ingestion (yr) Age-cohort-specific (Table I-9)EF Exposure frequency (days/yr) 350 (U.S. EPA, 1991)April 2010–Draft EPA document. I-5
Appendix ICalculation of Health-Based Numbers (HBNs) for CCW Constituent ScreeningTable I-8. Health-Based Concentration (ppm)CalcHBNHBNNC OralCHQOralTHQHBN RiskCRiskTRName Description ValueTHQ Target noncancer hazard quotient (unitless) 1TR Target cancer risk (unitless) 1.00E-5HQ_Oral Noncancer hazard quotient for ingestion (unitless) Calculated (Table I-7)Risk Total cancer risk (unitless) Calculated (Table I-7)C Constituent concentration in media (mg/L or mg/kg) Value set to unit concentration of 1Back calculation assuming linearity.Table I-9. Age Cohort-Specific Human Exposure FactorsParameter Cohort_1 Cohort_2 Cohort_3 Cohort_4Body weight (BW) (kg) 15.3 29.6 56.8 69.3Start year (SY) (yr) 3 8 15 20Fish consumption rate (CR_fish)(g WW/day)2 2 2 2Exposure duration (ED) (yr) 5 7.5 8 10Drinking water consumption rate(CR_dw) (L/day)0.6165 0.731 0.8685 1.275I.3 ReferencesBidleman, T.F. 1988. Atmospheric Processes. Environmental Science and Technology 22(4).EPRI (Electric Power Research Institute). 1997. Coal Combustion and Low Volume WastesComanagement Survey. EPRI. Palo Alto, CA. June.U.S. EPA (Environmental Protection Agency). 1996. Soil Screening Guidance TechnicalBackground Document. EPA/540/R/95/128. Office of Solid Waste and EmergencyResponse, Washington, DC. May.U.S. EPA (Environmental Protection Agency). 1997a. Exposure Factors Handbook, Volume I,General Factors. EPA/600/P-95/002Fa. Office of Research and Development,Washington, DC. August.April 2010–Draft EPA document. I-6
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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 Characterization90t
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Section 4.0Risk Characterization4.1
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Section 4.0Risk Characterizationund
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Section 4.0Risk CharacterizationTab
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Section 4.0Risk Characterizationdis
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Section 4.0Risk Characterizationana
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Section 4.0Risk Characterizationmay
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Section 4.0Risk Characterizationwas
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Section 4.0Risk CharacterizationMer
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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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April 2010-Draft EPA document.[This
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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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Page 373 and 374: Appendix HEcological BenchmarksRisk
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Page 389 and 390: Appendix JChemical-Specific Inputs
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Page 393 and 394: Appendix KScreening Analysis Result
Page 399 and 400: Appendix LTime to Peak Concentratio
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