Dangerous Substance and explosive
atmosphere regulations (DSEAR) 2002
What is DSEAR
A set of Regulations implemented into the UK legislative
system from the ATEX Directives 95 (equipment
manufacturers directive, also known as 100a or Directive
94/9/EC) and ATEX 137 (Directive 1999/92 EC) which, is
concerned with the protection of employees from fire and
explosion hazards arising from the use of dangerous
substances in the workplace. It applies to both employers
and the self employed. Enforcement of DSEAR is the
responsibility of the HSE &/or local authorities.
Compliance Dates
DSEAR became effective in the UK on 1st July 2003. Compliance
dates are: -
- Workplaces used for the first time after 30th June 2003 - Immediate
Compliance
- Workplaces in existence before 30th June 2003 - Compliance
by 30th June 2006
Industries Affected
ATEX 137 covers all industries where an explosive atmosphere may
arise. A small sample, non-exhaustive list includes:
- All industries involved in the use of flammable liquids
(inc. petrol, solvents, paints etc).
- Plastic manufacturers/processors.
- Food manufacturers.
- Woodworkers.
- Recycling industries.
- All industries producing a potentially
explosive atmosphere through generation
of dust as a byproduct of the manufacturing process
However, under ATEX 95 (equipment manufacturers
directive), it explicitly excludes: -
- Products for both medical and domestic use
- Personal Protective Equipment
- Products used in the presence of explosives.
- Military Equipment.
- Vehicles except those used in potentially explosive
atmospheres (i.e. Fork Lifts).
- Sea-going vessels and off shore units
DSEAR Requirements
Regulations are applicable to all workplaces where an
explosive atmosphere exists. The main requirements are:
- For employers to carry out a risk assessment of dangerous substances.
- To
identify the type and quantity of dangerous
substances, and their handling, storage and transport
arrangements
- To assess potential ignition sources and the effects
of an explosion
- Implement key mitigation controls.
- Classify and mark areas where explosive
atmospheres exist into zones.
- Where 5 or more persons are employed,
to record
the significant findings of the assessment.
DSEAR Key Mitigation Controls
- Reduce/minimise quantities held.
- Avoid/minimise release.
- Prevent formation of an explosive atmosphere
(i.e. provide mechanical ventilation).
- Avoid potential ignition
sources.
- Segregate hazardous materials and processes.
- Minimise numbers
of employees exposed.
- Provide suppression and explosion relief
to
machinery/plant where appropriate.
