Guidance for Conducting Risk Assessments and Related Risk ...

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TABLES 1. Applicable regulatory and interagency agreements........................................................................................... 7 2. Site categories ................................................................................................................................................. 12 3. Comparison of the baseline human health risk assessment and the risk evaluation of alternatives.................. 15 4. D&D risk assessment guidance documents..................................................................................................... 18 5. Risk assessment regulatory guidance documents............................................................................................ 20 6. End Use Working Group End Use Criteria..................................................................................................... 25 7. Paths to Closure End Use Scenarios............................................................................................................... 25 FIGURES 1. DOE-ORO Remedial Investigation/Feasibilty Study process......................................................................... 11 2. The site evaluation process and risk assessment.............................................................................................. 13 3. Site characterization and risk assessment ........................................................................................................ 14 4. The feasibility study and risk assessment........................................................................................................ 15 v
ACRONYMS ARARs Applicable or Relevant and Appropriate Requirements BHHRA Baseline Human Health Risk Assessment CERCLA Comprehensive Environmental Response, Compensation, and Liability Act COPC Chemical of Potential Concern COC Chemical of Concern CRE Center for Risk Excellence CROET Community Reuse Organization of East Tennessee D&D Decontamination and Decommissioning DOE U.S. Department of Energy EE/CA Engineering Evaluation/Cost Analysis ELCR Excess Lifetime Cancer Risk EM Environmental Management EPA U.S. Environmental Protection Agency ES&H Environmental Safety and Health ETTP East Tennessee Technology Park EUWG End Use Working Group FFA Federal Facilities Agreement HEAST Health Effects Assessment Summary Table HI Hazard Index IRIS Integrated Risk Information System LMES Lockheed Martin Energy Systems, Inc. M&I Management and Integration NPL National Priorities List OEPA Ohio Environmental Protection Agency OREIS Oak Ridge Environmental Information System ORNL Oak Ridge National Laboratory ORO Oak Ridge Operations ORR Oak Ridge Reservation PRG Preliminary Remediation Goal RAB Risk Advisory Board RAGS Risk Assessment Guidance for Superfund RAIS Risk Assessment Information System RATL Risk Assessment Technical Lead RCRA Resource Conservation and Recovery Act RFI RCRA Facility Investigation RGO Remedial Goal Option RI/FS Remedial Investigation/Feasibility Study ROD Record of Decision TDEC Tennessee Department of Environment and Conservation WWW World Wide Web Y-12 Oak Ridge Y-12 Plant vii
Page 1 and 2: BJC/OR-271 Guidance for Conducting
Page 3 and 4: Guidance for Conducting Risk Assess
Page 5: 5.1 COMPARISON TO RISK-BASED PRELIM
Page 9 and 10: 1. INTRODUCTION The U.S. Department
Page 11 and 12: Risk assessments and related risk a
Page 13 and 14: Section 4: A more detailed discussi
Page 15 and 16: Table 1. Applicable regulatory and
Page 17 and 18: Paducah Gaseous Diffusion Plant: Th
Page 19 and 20: Site Evaluation Remedial Investigat
Page 21 and 22: Removal Site Evaluation Removal Act
Page 23 and 24: The results of these risk analyses
Page 25 and 26: 3. OTHER ENVIRONMENTAL MANAGEMENT A
Page 27 and 28: 3.3 TECHNOLOGY DEVELOPMENT AND DEMO
Page 29 and 30: 4.1 DATA EVALUATION The first step
Page 31 and 32: S. Department of Energy Oak Ridge Y
Page 33 and 34: End Use Category Table 6. End Use W
Page 35 and 36: database incorporates information n
Page 37 and 38: Scenarios of Concern. Total noncarc
Page 39 and 40: The guidelines in this document dic
Page 41 and 42: 6. BASELINE HUMAN HEALTH RISK ASSES
Page 43 and 44: Note: Remedial Goal Options (RGOs)
Page 45 and 46: Spatial Anaysis and Decision Assist
Page 47 and 48: EPA. 1991d. Appendix D of RAGS, Vol
Page 49 and 50: APPENDIX A RISK ASSESSMENT TECHNICA
Page 51 and 52: ES/ER/TM-28 The Use of Institutiona
Page 53 and 54: spatially homogeneous, factors to a
Page 55 and 56: ES/ER/TM-33/R2 by providing more sp
Page 57 and 58:
K/ER-153/R1 Baseline Risk Assessmen
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Sections B.1 through B.5 provided i
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evaluated by comparison to the repo
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slope factor for 234 Th ( 234 Th do
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emaining analyses (since it had a l
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Analytes for which the maximum dete
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This guidance directs the user thro
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where: x = arithmetic mean of the b
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APPENDIX D GUIDE FOR AIR DISPERSION
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D.2 LAND USE—EXPOSURE SCENARIOS E
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Source Solidification/ Stabilizatio
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a certain depth of space. Two basic
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preclude the use of techniques for
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Technology-specific emission rates
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D-14 APPLICATION: Type Table D.4. S
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D-16 METEOROLOGY: RASCAL MILDOS- AR
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D.4.1.1 Screening-level codes D.4.1
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strongly recommended that external
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The primary difference between the
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1. source term 2. overland pathway
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Briggs, Klug, Brookhaven, St. Louis
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D-28 Table D.5. Atmospheric transpo
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D-30 Attributes CD M Table D.5. (co
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Only portions of the source area th
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D.4.2.2.3 CTDMPLUS The Complex Terr
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D.5. PARAMETERS The major input dat
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D.5.1.1.1 Wind directions In the va
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Table D.7. Meteorological data avai
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The EPA (1988) provides guidance on
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Input CAP88- PC Leafy Vegetables (K
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D.8. REFERENCES ANL (Argonne Nation
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Thibodeaux, L. J. 1989. Theoretical
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Table D.10. Baseline emission rate
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Table D.11. Remedial technologies t
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Table D.14. VOC emission rates for
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Title EPA and NTIS No. Date Estimat
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E.1 INTRODUCTION As one of the prim
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emedial decisions. Establishing a r
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Table E.2. Purpose of model selecti
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eview information from other simila
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its associated uncertainty, the tea
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E.4 REFERENCES Droppo, J. G., J. W.
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F.1 INTRODUCTION Human health risks
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F.2 PLANT MODELS For a complete ana
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Table F.1. (continued) Parameter De
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subsequently deposited on plant sur
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a major concern. F.2.1.2 Plant upta
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F.3 ANIMAL MODELS F.3.1 General Mod
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Table F.2. Recommended default valu
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f p = faction of the year the anima
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closely match the plant types of in
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consumption to a dry-weight basis b
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fat content of a cow (25%) and mult
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pasture, and dairy cattle obtain 60
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4.2.8 Fraction of daily water intak
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Hoffman, F. O., U. Bergstrom, C. Gy
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Peterson, H. T. ,. Jr.. 1983. Terre
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G.1. INTRODUCTION Calculation of th
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G.2.1 Soil Determining the size of
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Site Concentration 50 40 30 20 10 0
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Frequency Frequency Frequency 12000
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Stream G-11 Park Lake or River Figu
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More likely, contamination of sedim
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G.2.3 Groundwater The determination
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uncertainty analysis. G.2.4 Surface
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Figure G.12. ORNL groundwater risk
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G.2.4.1 Recommendations After selec
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G.3.2 Traditional Approach The firs
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G.3.3 Division of Data and the Bonf
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of giving smaller weights to areas
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Figure G.16. Variography of the exa
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5 Figure G.17. Kriged map of contam
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Northing 150 125 100 75 50 25 10 20
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concluded that the DL/2 method was
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The simulation presented in Sect. G
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By defining contamination boundarie
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Gilbert, R. 1987. Statistical Metho
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H.1. INTRODUCTION The quantitative
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(Andelman 1990) K p permeability co
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only (yr) 6 (child) (EPA 1991a) EF
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Table H.1. Uncertain parameters and
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values. These values are used in th
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Table H.4. Results of the uncertain
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and 12%, respectively) on the predi
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parameters that pertains to the adu
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While this methodology could be app
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EPA. 1991a. Risk Assessment Guidanc
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The first step in performing the in
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