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COMAH: The new Seveso III Directive and GHS

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HSL is to run a 1 day course on COMAH: The new Seveso III Directive and GHS.

7 May 2015



The Seveso II Directive, implemented in the UK as the COMAH Regulations, will be replaced in 2015 by the new Seveso III Directive. A major change will be the use of the Globally Harmonised System (GHS) for classification of chemicals to determine whether they are within the scope of the Directive. There is the potential for sites to change their COMAH status (top tier, lower tier or non-COMAH) when the new Directive is implemented, depending on the substances and quantities held.

The course will give an overview of the requirements of the new Directive and the timetable for implementation as revised COMAH regulations. It will also cover the potential changes in scope and how to determine the likely effects on a site by determining the GHS categories of substances. The presenters have been providing scientific advice to the UK team which negotiated Seveso III for several years.


The course will cover:

  • Introduction to the changes likely to be introduced by Seveso III
  • Alignment of Seveso III with GHS
  • Aggregation rules
  • What might this mean for the UK and for you?
  • How to determine GHS category for acute toxicity.
  • How to determine GHS category for environmental hazards (M factor method)

Who should attend?

Safety managers and those responsible for compliance with the COMAH Regulations should attend. This would include existing COMAH top tier and lower tier sites, and also sites which are currently outside of COMAH but may have potential to come into scope.


The course will be run at the HSL laboratory in the spa town of Buxton. Buxton is in the heart of the Peak District and has good links to mainline train stations and Manchester International Airport.

Details of hotels in the Buxton area can be found at


The cost of the course with the discount is is £427.50 per person (includes course notes, lunch and refreshments).

Book Course

Please note the invoice option is not available within 4 weeks of the course date, or for overseas customers.

For further information email: or contact the Training & Conferences Unit
at HSL directly on +44 (0)1298 218806.

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Contact Details

Training & Conferences Unit
Harpur Hill
Buxton, Derbyshire
SK17 9JN
T: +44 (0) 1298 218806
F: +44 (0) 1298 218822