Federal Contaminated Site Risk Assessment In Canada Part I: Guidance on Human Health Preliminary Quantitative Risk Assessment (PQRA)

2004
ISBN: 0-662-38244-7
Cat. No.: H46-2/04-367E

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Table of Contents

• Preface
• Abbreviations and Acronyms
• 1. Introduction
  • 1.1 Background
  • 1.2 Purpose
  • 1.3 Preliminary Quantitative Risk Assessment versus More Complex Site-Specific Risk Assessment
  • 1.4 Petroleum Hydrocarbons and Radiological Contaminants
• 2. Scope of Work / PQRA Report Content
  • 2.1 Executive Summary
  • 2.2 Introduction
  • 2.3 Description of the Property/Site
    • 2.3.1 Concentrations of Contaminants in Environmental Media
  • 2.4 Problem Formulation
    • 2.4.1 Screening and Identification of Contaminants of Potential Concern
    • 2.4.2 Identification of Potential Receptors
    • 2.4.3 Identification of Operable Exposure Pathways
    • 2.4.4 Problem Formulation Checklist
  • 2.5 Exposure Assessment
    • 2.5.1 Characterization of Potential Receptors
    • 2.5.2 Exposure Frequency and Duration
    • 2.5.3 Exposure Equations
    • 2.5.4 Airborne Respirable Dust Levels
    • 2.5.5 Models
    • 2.5.6 Relative Absorption Factors and Exposure via Multiple Pathways
    • 2.5.7 Carcinogens
  • 2.6 Hazard Assessment
  • 2.7 Risk Characterization
    • 2.7.1 Non-carcinogens: Single-Substance Exposures
    • 2.7.2 Carcinogens: Single-Substance Exposures
    • 2.7.3 Exposure to Mixtures
  • 2.8 Non-standard Assumptions and Toxicological Reference Values
  • 2.9 Uncertainties
  • 2.10 Conclusions and Discussion
  • 2.11 Recommendations
  • 2.12 References
  • 3. References
  • Appendix A Screening Contaminants of Potential Concern for Local or Regional Background (Natural) Soil, Groundwater and Surface Water Concentrations
  • Appendix B Essentially Negligible Cancer Risk for Contaminated Site Risk Assessment
• List Of Tables
  • Table 1 Specific Characteristics of Preliminary Quantitative Risk Assessments (PQRAs) vs Site-Specific Risk Assessments (SSRAs)
  • Table 2 Problem Formulation Checklist
  • Table 3 Recommended Human Receptors and Their Characteristics for Preliminary Quantitative Risk Assessments
  • Table 4 Exposure Duration and Frequency Assumptions for Preliminary Quantitative Risk Assessments
  • Table 5 Recommended General Equations to Be Used to Estimate Doses
  • Table 6 Relative Dermal Absorption Factors (RAF_Dermal) Recommended for Preliminary Quantitative Risk Assessments