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CRD - Live Online Workshop: Surface Water Exposure via Drainflow

Live Online



HSE's Chemicals Regulation Division will be holding a half-day live online workshop focussing on environmental exposure of surface waters via drainflow. The workshop will present attendees with an overview of drainflow and the associated environmental fate assessments required to meet regulatory requirements in the UK.  Key issues that applicants must take into account when preparing active substance or product submissions will be highlighted.  The workshop will cover step-by-step introductions to the use of first tier and higher tier tools, including the recently released version of the MACRO 5 tool.  The workshop will comprise a mixture of presentations and live run throughs of models using worked examples covering active substances, metabolites, mixed active products, and conclude with an open question and answer session.  By the end of the workshop, participants will have a better appreciation of this area of pesticide risk assessment and be better able to prepare regulatory submissions for plant protection products.

The course will cover:

  • Introduction to drainflow
  • Key endpoints - the EFSA conclusion and GB Competent Authority conclusion, data gaps and critical areas of concern
  • First tier drainflow - step-by-step guide and worked examples
  • Higher tier drainflow - step-by-step guide using MACRO 5 and worked examples
  • Presentation of higher tier MACRO modelling results and introduction to ecotox criteria
  • Metabolites
  • The use of the risk envelope approach
  • Mixed active products
  • Common problems with applications


Download the programme for the day here

Who should attend?

This course will be specifically designed for those with at least a basic working knowledge of environmental fate and behaviour who want to develop their expertise in this specific area further.

Live Online Course Information

All you will need is an internet-connected computer, laptop or tablet, plus a webcam and microphone. We do not recommend using a smartphone. Before you book, please check that you meet the Zoom System Requirements and run a diagnostic test to ensure the software is compatible with your firewall settings. If this does not work, try adjusting your settings or contact your IT department about permitting the website.


The cost of this course is £325 (plus VAT) per person.



Please note that all courses must be paid for via credit card at the time of booking.

Some of our training courses can also be delivered in-company, please contact us to discuss your requirements.

Telephone: +44 (0)203 028 3704

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