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Rick Lee

on 22 June 2013

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Baseline HHERA Scenario
chemical concentration in:
soil, water, sediment, air, vegetation, fish tissue,
invertebrate tissue, bird tissue, small mammal
or game tissue
Human Health Risk Assessment Examples
How many of you have respiratory problems?
- Asthma, allergies to pollen/dust/animal
Project Scenario
Why am I telling you all this?!?
Air team
models contaminants in atmosphere
team models contaminants in water
team models contaminants in soil and sediments
Abiotic --> Abiotic Modeling

Health team models air, water, soil and sediment contaminant transfer to human and eco receptors
Abiotic --> Biotic Modeling
You are
to us!
chemical concentrations in soil, water, sediment, air...

Determine risk associated with
each chemical
each human
ecological receptor

It's not just about guidelines!!
Human Health and Ecological
Risk Assessment

Human Health Risk Assessment Conceptual Model
Risk Assessment is the quantification that a specific negative effect will occur in a population
Example: 1 in 100,000 people could develop cancer from project X in their lifetime

1 in 50 people with existing respiratory problems will experience
project-related respiratory health effects

Voles living within 300 meters of the mine will be exposed to
potentially harmful levels of arsenic from their diet

How do we assess
What is Risk Assessment?
3 Components of "Risk"
What chemicals hazards are present in the project?
Persistent Organic Pollutants
Dioxins & Furans
Dredging of Sediments
Nitrates (explosives)
Hazard Component
Where are the "sensitive" receptors?
Which animal and plant
species are present?
Receptor Component
Exposure Component
Country food interviews
Eco Receptor Information
Bear Home Range
Area of Project Effects
Diet, food & water ingestion rate, soil ingestion rate, home range
What animals and plants are eaten?
How much of each food is eaten daily?
Do people drink naturally sourced water?
Vole Home Range
All 3 components must exist for risk to occur
Hazard + Receptor
- Exposure
= No Health Risk
Hazard + Receptor + Exposure = Health Risk
Requires collaboration with most teams:
- Terrain/Soils - Hydrology - Aquatics - Air Quality
- Vegetation - Wildlife - Fisheries - Land Use
- Traditional Knowledge - Geochemistry - Reclamation
Natural Gas Flares
LNG Facilities
H2S, SOx, NOx, CO
Dust and Particulate Matter
Harmful Gas Emissions
Receptor + Exposure
- Hazard
= No Health Risk
Daily Air Quality
Human Health Risk Assessment Examples
How many people take daily vitamin supplements?

How many should you take at a time?
Human Health Ecological Health
Rick Lee

Mark Whelly

Baseline data collected by: soil, aquatic, air, veg, fish teams
Modeled data provided by: hydrology, air, reclamation, geochemistry teams
Receptor data provided by: wildlife, land use, traditional knowledge teams
Guess where HHERA is?
Today's Take-Home Message
Involve us early on in the planning and scoping stages -
We're a team!
Potential chemical hazards, scope of field work and modeling requirements for HHERA aren't always the same for a project type
We might have unique requests outside of your discipline's typical scope
You are important to us, so please keep us in your discipline loop
Ecological Health Risk Assessment
Conceptual Model
Why is Risk Assessment Important?
The RA informs engineers when the project design may have adverse effects to human or ecological health

Addresses the concerns of gov't, First Nations and the public on
real and perceived
health impacts in a scientifically defensible manner
Air Quality Index
Where is this?
Full transcript