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Course Description & Learning Outcomes:

This full day hands-on course provides participants with an introduction to Human Health Quantitative Risk Assessment. The course will be taught through a series of lectures interspersed with practical hand-on sessions using the Environment Agency’s CLEA model. Delegates will learn about:

  • The principles behind human health quantitative risk assessment
  • What the CLEA model is and does
  • How to derive generic assessment criteria (including C4SL) using CLEA
  • How the different pathways in CLEA are modelled and key assumptions
  • How to use CLEA in Advanced Model for conducting detailed quantitative risk assessments
  • Bioavailability and bioaccessibility - how to address using CLEA
  • Health based guidance values and an introduction to human health toxicology

Each course is restricted to 10 delegates to ensure good trainer to delegate ratio for the practical work. Delegates are required to bring their own laptops preloaded with the CLEA software version 1.071 (available from .
A certificate of attendance will be provided on completion of attendance.

Who should attend this course:

Geoenvironmental consultants, remediation contractors, contaminated land officers/regulators.

About the Trainer:

Simon Firth is an independent consultant with more than 25 years experience working on land contamination projects in the UK and worldwide. Over that time he has developed significant expertise in human health and environmental risk assessment. Simon is an experienced and enthusiastic trainer and has in depth knowledge of the CLEA model. He has been instrumental in the development of UK generic soil and groundwater screening values derived using CLEA including the CL:AIRE/EIC/AGS GAC, the Defra C4SL and the SoBRA groundwater vapour GAC.

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