Exposure assessment using the CLEA model. Ian Martin, Principal Scientist. Over the next 30 - 40 minutes …. Origins of CLEA and its role in assessing risk Managing land contamination in England and Wales A tiered risk-based approach History and role of the CLEA model
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Ian Martin, Principal Scientist
“The last hundred years have seen a massive increase in the wealth of this country and the well-being of its people. But focusing solely on economic growth risks ignoring the impact – both good and bad – on people and the environment. Had we taken account of these links in our decision making, we might have reduced or avoided costs such as contaminated land or social exclusion.”
“…it’s as if we are at school. The person you thought was your friend turns out to be the playground bully, he hits you and then tries to say sorry…and you’re not having it”
Weston resident, Cheshire
Preliminary risk assessment
Tiered risk assessment from Model Procedures, CLR11 (2004)
Contents of leaking drum enters the soil
Chemical seeps through the soil and into adjacent gardens
Family use garden and are exposed to contaminated soil
A conceptual model represents the characteristics of the site in diagrammatic or written form that shows the possible relationships between contaminants, pathways and receptors.