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Evaluation of approaches for terrestrial hazard classification.
Fabrice G Renaud1, Alistair B A Boxall, Robin Toy
1Cranfield Centre for EcoChemistry, Cranfield University, Silsoe, Bedfordshire MK45 4DT, UK. renaud@ehs.unu.edu
Chemosphere
|November 3, 2004
Summary
This study assessed terrestrial hazard assessment schemes for soil contaminants. Earthworm data suggest current toxicity cut-off values are appropriate, but data gaps hinder broad classification.
Area of Science:
- Environmental toxicology
- Ecotoxicology
- Chemical risk assessment
Background:
- Hazard assessment is crucial for evaluating chemical impacts on the environment.
- Existing schemes primarily focus on aquatic environments, with recent proposals for terrestrial compartments.
- Limited data hinder the validation of toxicity cut-off values and practical application of terrestrial schemes.
Purpose of the Study:
- To examine proposed toxicity cut-off values for terrestrial hazard assessment schemes.
- To evaluate data availability for soil compartment risk assessment.
- To assess the feasibility of a widespread terrestrial classification system.
Main Methods:
- Analysis of earthworm toxicity data.
- Examination of toxicity cut-off values from two terrestrial hazard assessment schemes.
- Data availability assessment using the International Uniform Chemical Information Database (IUCLID).
Main Results:
- Earthworm toxicity data support the appropriateness of current toxicity cut-off value proposals.
- IUCLID analysis revealed insufficient data for classifying even high-production volume chemicals.
- Data availability is better for specific substance groups like pesticides and veterinary medicines.
Conclusions:
- Current toxicity cut-off values for terrestrial hazard assessment appear suitable based on earthworm data.
- Significant data gaps exist, preventing widespread application of terrestrial classification systems.
- Future initiatives like REACH may provide necessary data for broader implementation.