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HWIR Risk Assessment
The risk assessment described in the USEPA's 1999 HWIR notice consists of the following components:
- Integrated Research Plan
- Multimedia, Multipathway, and Multireceptor (3MRA) Strategy
- 2003 Science Advisory Board Review Materials for the 3MRA Modeling System
- Peer Reviews of 3MRA Modules
Integrated Research and Development Plan for 3MRA
- Peer Review Draft, October 1998: ORD/ORCR Integrated Research and Development Plan for HWIR (PDF) (153 pp, 1.2MB)
- Appendix A (PDF) (7 pp, 1.5MB)
- Figures 1 & 2 (PDF) (2 pp, 278K)
- Figure 3 (PDF) (1 pg, 130K)
- Figure 4 (PDF) (1 pg, 85K)
- Figure 5 (PDF) (1 pg, 16K)
- Figure 6 (PDF) (2 pp, 2.0MB)
- Figures 7 - 10 (PDF) (5 pp, 909K)
- Figure 11 (PDF) (1 pg, 1.1MB)
- Figure 12 (PDF) (1 pg, 1.5MB)
- Figure 13 (PDF) (1 pg, 863K)
- Figure 14 (PDF) (1 pg, 862K)
- Figure 15 (PDF) (1 pg, 861K)
- Figure 16 (PDF) (1 pg, 860K)
- Figure 17 (PDF) (1 pg, 860K)
- Figure 18 (PDF) (1 pg, 862K)
- Figure 19 (PDF) (1 pg, 808K)
- Figure 20 (PDF) (1 pg,794xK)
- Figure 21 (PDF) (1 pg, 860K)
- Figure 22 (PDF) (1 pg, 860K)
- Figure 23 (PDF) (1 pg, 860K)
- Figure 24 (PDF) (1 pg, 860K)
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Multimedia, Multipathway, and Multireceptor (3MRA) Assessment Strategy (October 1999) describes the overall direction for the risk assessment. The assessment is a forward-calculating analysis that evaluates the multiple exposure pathway risks to human and ecological receptors. A forward-calculating analysis starts with a chemical concentration in a waste management unit, estimates the release and transport of the chemical in various environmental media, and predicts the exposure and risk that result from those concentrations. The strategy also describes the probabilistic approach to the assessment and explains how the results provide an estimate of risk on a national scale. Finally, the strategy describes several different analytical levels that the assessment could follow depending on available resources and the amount and quality of available data. For this analysis, we did not implement the strategy to its fullest extent.
- A Framework for Finite-Source Multimedia, Multipathway and Multireceptor Risk Assessment: 3MRA (PDF) (55 pp, 1.0MB)
- Data Collection for the Hazardous Waste Identification Rule, Section
1: Introduction,
Section 2: Overview/Site Layout (PDF) (68 pp, 464K)
- Data Collection for the Hazardous Waste Identification Rule, Section
3: Waste Management Unit Data (PDF) (107 pp, 1.2MB)
- Data Collection for the Hazardous Waste Identification Rule, Section
4: Meteorological Data (PDF) (98 pp, 590K)
- Data Collection for the Hazardous Waste Identification Rule, Section
5: Watershed and Waterbody Layout (PDF) (67 pp, 704K)
- Data Collection for the Hazardous Waste Identification Rule, Section
6: Surface Water Data (PDF) (69 pp, 522K)
- Data Collection for the Hazardous Waste Identification Rule, Section
7: Soil Data (PDF) (38 pp, 523K)
- Data Collection for the Hazardous Waste Identification Rule, Section
8: Human Exposure Factors (PDF) (50 pp, 276K)
- Data Collection for the Hazardous Waste Identification Rule, Section
9: Human Receptor Data (PDF)
(96 pp, 1.5MB)
- Data Collection for the Hazardous Waste Identification Rule, Section
10: Farm Food Chain and Terrestrial Foodweb Data (PDF) (46 pp, 196K)
- Data Collection for the Hazardous Waste Identification Rule, Section
11: Aquatic Food Web Data (PDF) (59 pp, 275K)
- Data Collection for the Hazardous Waste Identification Rule, Section
12: Ecological Exposure Factors (PDF) (48 pp, 291K)
- Data Collection for the Hazardous Waste Identification Rule, Section
13: Ecological Receptors and Habitats (PDF) (109 pp, 2.7MB)
- Data Collection for the Hazardous Waste Identification Rule, Section
14: Ecological Benchmarks (PDF) (105 pp, 427K)
- Data Collection for the Hazardous Waste Identification Rule, Section
15: Human Health Benchmarks (PDF) (100 pp, 521K)
- Data Collection for the Hazardous Waste Identification Rule, Section
16: Miscellaneous Data (PDF) (49 pp, 251K)
- Air Module Pre- and Post- Processor, Background and Implementation
for the Multimedia, Multipathway, and Multireceptor Risk Assessment
(3MRA) for HWIR99 (PDF) (25 pp, 214K)
- Aquatic Food Web Module, Background and Implementation for the Multimedia,
Multipathway, and Multireceptor Risk Assessment (3MRA) for HWIR99 (PDF) (55 pp, 231K)
- Ecological Exposure Module, Background and Implementation for the
Multimedia, Multipathway, and Multireceptor Risk Assessment (3MRA) for
HWIR99 (PDF) (41 pp, 115K)
- Ecological Risk Module, Background and Implementation for the Multimedia,
Multipathway, and Multireceptor Risk Assessment (3MRA) for HWIR99 (PDF) (43 pp, 85K)
- Farm Food Chain Module, Background and Implementation for the Multimedia,
Multipathway, and Multireceptor Risk Assessment (3MRA) for HWIR99 (PDF) (39 pp, 119K)
- Human Exposure Module, Background and Implementation for the Multimedia,
Multipathway, and Multireceptor Risk Assessment (3MRA) for HWIR99 (PDF) (38 pp, 121K)
- Human Risk Module, Background and Implementation for the Multimedia,
Multipathway, and Multireceptor Risk Assessment (3MRA) for HWIR99 (PDF) (27 pp, 104K)
- Source Modules for Non-Wastewater Waste Management Units (Land Application
Units, Waste Piles, and Landfills), Background and Implementation for
the Multimedia, Multipathway, and Multireceptor Risk Assessment (3MRA)
for HWIR 99 (PDF) (102 pp, 757K)
- Source Modules for Tanks and Surface Impoundments, Background and
Implementation for the Multimedia, Multipathway, and Multireceptor Risk
Assessment (3MRA) for HWIR99 (PDF) (54 pp, 281K)
- Terrestrial Food Chain Module, Background and Implementation for the
Multimedia, Multipathway, and Multireceptor Risk Assessment (3MRA) for
HWIR99 (PDF) (38 pp, 107K)
- Watershed Module, Background and Implementation for the Multimedia,
Multipathway, and Multireceptor Risk Assessment (3MRA) for HWIR99 (PDF) (19 pp, 172K)
- Vadose and Saturated Zone Modules Extracted from EPACMTP for HWIR99 (PDF) (105 pp, 2.1MB)
- The HWIR Surface Water Module (PDF) (81 pp, 447K)
- FRAMES-HWIR: Technology Software System For 1999, Volume 1: System
Overview (PDF) (20 pp, 672K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
2: System User Interface (PDF) (40 pp, 691K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
4: Site Definition Processor (PDF) (154 pp, 217K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
6: Multimedia Multipathway Simulation Processor (PDF) (61 pp, 775K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
7: Exit Level Processor (PDF) (51 pp, 128K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
8: Specifications (PDF)
- Part 1 (PDF) (45 pp, 351K)
- Part 2 (PDF) (28 pp, 294K)
- Part 3 (PDF) (42 pp, 400K)
- Appendix A (PDF) (82 pp, 1.0MB)
- Appendix B (PDF) (4 pp, 97K)
- Appendix C (PDF) (3 pp, 54K)
- Appendix D (PDF) (14 pp, 148K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
9: Software Development and Testing Strategies (PDF) (32 pp, 1.1MB)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
10: Facilitating Dynamic Link Libraries (PDF) (139 pp, 194K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
11: System User's Guide (PDF) (32 pp, 3.5MB)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
12: Contextual Dictionary (PDF) (22 pp, 211K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
13: Chemical Properties Processor (PDF) (85 pp, 135K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
14: Site Layout Processor (PDF) (53 pp, 324K)
- Documentation for the FRAMES-HWIR Technology Software System, Volume
15: Risk Visualization Processor and Exit Level-II Processor (PDF) (66 pp, 279K)
- Data Requirements and Confidence Indicators for Ecological Benchmarks
Supporting Exemption Criteria for the Hazardous Waste Identification
Rule (HWIR) (PDF) (37 pp, 161K)
- Risk Characterization Report for the HWIR99 Multimedia, Multipathway
and Multireceptor Risk Assessment (3MRA) (PDF) (190 pp, 1.3MB)
- Chemical Data Base for HWIR99 (PDF) (19 pp, 48K)
- Partition Coefficients for Metals in Surface Water, Soil, and Waste (PDF) (74 pp, 312K)
- Memorandum to Stephen Kroner: "Site Selection for HWIR Sampling" (PDF) (11 pp, 101K)
- Memorandum to Stephen Kroner: "Sensitivity of ISCST3 Model Estimates
to Distance from Source" (PDF) (35 pp, 1.5MB)
- User's Guide for the Industrial Source Complex (ISC3) Dispersion Models
for Use in the Multimedia, Multipathway and Multireceptor Risk Assessment
(3MRA) for HWIR99, Volume I: User Introduction (PDF) (324 pp, 2.1MB)
- User's Guide for the Industrial Source Complex (ISC3) Dispersion Models
for Use in the Multimedia, Multipathway and Multireceptor Risk Assessment
(3MRA) for HWIR99, Volume II: Description of Model Algorithms (PDF) (134 pp, 501K)
- Testing of the Sampled Chronological Input Model (SCIM) Option in
the Enhanced ISCST3 Model for Use in the Hazardous Waste Identification
Rule (HWIR)
- Part 1 (PDF) (262 pp, 1.5MB)
- Part 2 (PDF) (16 pp, 157K)
- Part 3 (PDF) (24 pp, 257K)
- Part 4 (PDF) (54 pp, 224K)
- Part 5 (PDF) (7 pp, 15K)
- Part 6 (PDF) (34 pp, 65K)
- Part 7 (PDF) (21 pp, 114K)
- Part 8 (PDF) (36 pp, 145K)
- Part 9 (PDF) (45 pp, 171K)
- Background Document for EPACMTP, Metals Transport in the Subsurface
(PDF) (108 pp, 466K)
- Anaerobic Biodegradation Rates of Organic Chemicals in Groundwater:
A Summary of Field and Laboratory Studies (PDF) (182 pp, 843K)
- MINTEQA2/PRODEFA2, A Geochemical Assessment Model for Environmental
Systems: User Manual Supplement for Version 4.0 (PDF) (82 pp, 209K)
- Diffuse-Layer Sorption Reactions for use in MINTEQA2 for HWIR Metals
and Metalloids (PDF) (18 pp, 42K)
- Verification Document for HWIR99 Pseudo-Three Dimensional Aquifer
Module (PDF) (43 pp, 755K)
- Verification Document for HWIR99 Vadose Zone Module (PDF) (15 pp, 324K)
- Verification Document for HWIR99 Landfill Module (PDF) (39 pp, 633K)
- Verification Document for HWIR99 Surface Impoundment Module (PDF) (36 pp, 661K)
- A Study to Assess the Impacts of Fractured Media in Monte-Carlo Simulations (PDF) (32 pp, 232K)
- Changes in the MINTEQA2 Modeling Procedure for Estimating Metal Partitioning
Coefficients in Groundwater for HWIR99 (PDF) (8 pp, 70K)
- Incorporation of Heterogeneity into Monte-Carlo Fate and Transport
Simulations (PDF) (66 pp, 1.4MB)
- Characterization of Hydraulic Properties of Potentially Fractured
Industrial D Landfill Sites, and A Study of Heterogeneity Effects on
Fate and Transport in Groundwater (PDF) (66 pp, 2.5MB)
- Aerobic Biodegradation of Organic Chemicals in Groundwater: A Summary
of Field and Laboratory Studies (PDF) (32 pp, 123K)