IRAP-h View Ver 3.0 fully implements the latest U.S. EPA guidance for evaluating risk from emission sources: the Final U.S. EPA - OSW Human Health Risk Assessment Protocol (HHRAP) EPA530-R-05-006.

Human Health Risk Assessment Protocol for Hazardous Waste Combustion Facilities
Updated with EPA530-R-05-006!

Cover Section: (400kb) Cover pages, Acknowledgments, Tables of Contents, Figures, and Tables, as well as lists of Acronyms and an indexed list of parameters found in the HHRAP.

Chapter 1: (77kb) Introduction with objectives and purpose, related Trial Burn issues, reference documents and organization of remainder of document.

Chapter 2: (714kb) Facility Characterization discussing compiling basic facility information, identifying emission sources, estimating emission rates, identifying compounds of potential concern (COPCs), estimating COPC concentrations for non-detects and evaluating contamination in blanks.

Chapter 3: (554kb) Air Dispersion and deposition Modeling with recommended models, site-specific characterization, use of unit emission rate, partitioning of emissions, meteorological data requirements, meteorological preprocessors, ISCST3 model input files, ISCST3 model execution, use of modeled output, modeling fugitive emissions and modeling acute risk.

Chapter 4: (82kb) Exposure Scenario Identification with exposure setting characterization, recommended exposure scenarios and exposure scenario locations.

Chapter 5: (1323kb) Estimation of Media concentrations with calculation of COPC concentrations in air, soil, produce, beef and dairy products, pork, chicken and eggs and drinking water and fish.

Chapter 6: (138kb) Quantifying Exposure with generic exposure rate equations, consumption rate, exposure frequency and duration, averaging time and body weight.

Chapter 7: (65kb) Risk and Hazard Characterization with individual risk and hazard estimation, quantitative estimation of cancer risk, quantitative estimation of noncancer effects, target levels and acute exposure resulting from direct inhalation.

Chapter 8: (38kb) Uncertainty Interpretation for Human Health Risk Assessment with uncertainty and limitations of the risk assessment, types of uncertainly, qualitative estimates of uncertainty, quantitative estimates of uncertainty and risk assessment uncertainty discussion.

Chapter 9: (52kb) Completion of Risk Assessment and Follow-On Activities with conclusions and activities following risk assessment completion.

References: (113kb) References used in this document.

Appendices and Chemical-Specific Data

Appendix A: (495kb)

• Chemicals for Consideration as Compounds of Potential Concern a compilation (from various EPA sources) of compounds of potential interest.
• A-2 Chemical-Specific Parameter Value Information. Details the sources of, or equations used to calculate, parameter values used in fate & transport-, biotransfer-, exposure-, and toxicity-related equations. Parameter values themselves are found in the HHRAP companion database (see below).

Appendix B: (1,665kb) Equations and recommended default variable values for estimating media concentrations.

Appendix C: (389kb) Equations and recommended default variable values for estimating potential cancer risk and non-cancer health effects.

Download HHRAP Companion Database: (312kb) MSAccess Database File.

Note: You will need Microsoft Access Viewer, available as a free download, to view some of the files on this page. See Microsoft's ACCESS™ Viewer Download page to learn more about Access, and for a link to the free ACCESS™ Viewer.

1998 U.S. EPA - OSW Human Health Risk Assessment Protocol (HHRAP)