Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:14:p3
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 14 (pt 3/4)
Character Range: 881189–884515

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1 Introduction
1.1 Objectives
1.2 Overview of Schedule B4
1.3 Introduction to quantitative health risk assessment in contaminated land decision-making
1.4 Site assessment process and terminology
1.4.1 Health investigation levels
1.4.2 Conceptual site model
1.4.3 The tiered approach
2 The Australian risk assessment framework
2.1 The enHealth framework
2.2 Risk assessment framework for contaminated sites
2.3 Fundamentals of the risk assessment approach
2.3.1 Issues identification
2.3.1.1 Planning and scoping
2.3.1.2 Problem formulation
2.3.2 Exposure pathways
2.3.3 Conceptual site model
2.4 The tiered approach
2.4.1 Fundamentals of the tiered approach
2.4.1.1 Tier 1
2.4.1.2 Tier 2
2.4.1.3 Tier 3
2.4.2 General risk assessment assumptions
2.4.3 Risk assessment endpoints
2.4.4 Deterministic versus probabilistic estimates
3 Data collection and data evaluation
3.1 Data collection
3.2 Source variables
3.2.1 Organic speciation
3.2.2 Metals speciation
3.2.3 Background concentrations
3.2.4 Vapour and particulate (dust) sampling
3.3 Exposure pathway variables
3.3.1 Organic carbon content
3.3.2 Other key pathway parameters
3.4 Data evaluation
3.4.1 Data quality assessment and data quality objectives
3.4.1.1 Analytical methods
3.4.1.2 Data quality objectives
3.4.1.3 Limits of detection
3.4.1.4 Density and distribution of samples
3.4.2 Three dimensional source definition
3.4.3 Refining the exposure pathways
3.4.4 Tier 1 screening
4 Exposure assessment
4.1 Introduction
4.2 Exposure settings
4.2.1 Defining model inputs to represent the contaminant source
4.2.2 Exposure pathway input values
4.2.3 Exposed population input values
4.3 Exposure point concentrations
4.4 Exposure point concentrations  volatiles
4.4.1 Introduction
4.4.2 Indoor air concentrations:
4.4.3 Outdoor air concentrations
4.4.4 Finite and infinite sources
4.4.5 Biodegradation
4.4.6 Vapours from non-aqueous phase liquids
4.5 Exposure point concentrations  particulates
4.6 Exposure point concentrations  food consumption
4.6.1 Fruit and vegetable consumption
4.6.2 Poultry, meat and fish consumption
4.7 Estimation of contaminant intake
4.7.1 Introduction
4.7.2 Ingestion intakes
4.7.3 Dermal intakes
4.7.4 Inhalation intakes
4.8 Specific considerations in exposure modelling
4.8.1 Blood lead modelling
4.8.2 Bioavailability and bioaccessibility
4.8.3 The approach for petroleum hydrocarbons
5 Toxicity assessment
5.1 Introduction
5.1.1 Sources of toxicity information
5.1.2 Sources of physical and chemical data
5.2 Hazard identification
5.2.1 Acute effects
5.2.2 Chronic threshold effects