1. Developing guidance with Member State-regulators to implement bioavailability-based environmentally quality standards for metals.
Graham Merrington
WG Chemicals October

2. What is this? guid·ance, noun
“the act or function of guiding; leadership; direction”
Final practical links between regulatory practice and the science
Need for consistent implementation of bioavailability- based approaches across MS, Industry, Stakeholders.
Steering group of MS Regulators, Corresponding Members to include stakeholders
wca’s time paid for by IZA, ECI, NiPERA and ILA
WG Chemicals October

3. How will this work? Member States:
Develop scope
Identify key challenges
Steer the guidance (Editorial Control)
Provide examples of good practice, experiences
Ensure ‘regulatory fit’
Industry/Stakeholders other Member States
Corresponding members – comment of drafts, provide examples/challenges concerns
Facilitate use of full-BLMs
wca
Facilitate discussions, draft the guidance as directed, for comment.
WG Chemicals October

4. Draft Table Of Contents to include
Introduction
Tiered approach for using bioavailability (under the WFD) (accounting for total and added risk)
Available bioavailability tools
Summary of minimum validation requirements and performance specifications for tools
Obtaining the data required for bioavailability calculations
Undertaking calculations
Interpreting results
Dealing with bioavailability estimates outside of model ranges
What are validated ranges and what do they mean?
What are the options for when the water under investigation falls outside the boundary conditions of the model
Compliance / Classification/ Permitting?
Exceedance and failure (what is a failure?)
WG Chemicals October

5. In addition FAQs Glossary and definitions Annexes of examples
Comparison exercise of all models in relation to Full- BLMs
Possible now boundary validations completed
EQS finalised
WG Chemicals October