Event Details

Join the Australasian College of Toxicology & Risk Assessment (ACTRA) in a unique webinar series! These interactive online sessions cover two overarching themes in relation to toxicology and risk assessment in Australia:
1. Lessons learnt from case studies.
2. Practical applications of theoretical concepts.
These sessions will provide you with an opportunity to gain insight from Australia’s most accomplished and experienced toxicologists and risk assessors, and more importantly encourage an open forum for questions and discussion.

ACTRA is pleased to present this webinar on “Using environmental data for a human health and ecological risk assessment: what do the numbers actually mean?” by Therese Manning, on April 3, 2025.

Using environmental data for a human health and ecological risk assessment

Analytical data are easy to misinterpret so it’s important to improve our understanding of what the numbers mean and where the numbers come from.

This session will provide discussion of the following issues:
• Sources and degree of sampling and measurement uncertainty
• Units – how not to confuse everyone and how to convert between units that people commonly mix up
• Reason why you might get elevated Limits of Reporting (LORs) and what to do or not do with them
• How can we tell if the level of contamination in two samples is actually different
This webinar will not include discussion of statistical tools that can be applied to our data (if relevant, given the small datasets we usually have). It will focus on the basics/foundations of sampling design and chemical analysis to show the following:
• What we can and cannot say given the number of samples we have covering the media we are interested in and the sampling design
• What we can and cannot say based on how analytical methods work and the basics of measurement uncertainty.

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