Banner

Banner


"The Resource Centre For Hazardous Area Professionals"

Social Media

How well do you know your WELs? EH40 Third Edition is now in force

Print PDF
User Rating: / 0
PoorBest 

How well do you know your WELs? EH40 Third Edition is now in force

In 2005 the first version of EH40 was launched giving a comprehensive list of workplace exposure limits for use with the Control of Substances Hazardous to Health Regulations 2002.  

On 21 August 2018, the European Commission’s fourth Directive on Indicative Occupational Exposure Limit Values (2017/164/EU) was implemented in Great Britain and Northern Ireland and is reflected in the 3rd Edition of EH40. (Read More)

 

There were new entries for the following substances:

  • 2-ethylhexan-1-ol
  • Acetic acid
  • Acrylic acid
  • Amitrole
  • But-2-yne-1,4-diol
  • Diacetyl
  • Glycerol trinitrate
  • Methyl formate
  • Nitroethane
  • Nitrogen dioxide
  • Nitrogen monoxide
  • Sulphur dioxide
  • Hydrogenated terphenyl
  • Tetraethyl orthosilicate

New 8-hour time-weighted averages (TWAs) were introduced for:

  • 2-ethylhexan-1-ol
  • Amitrole
  • But-2yne-1,4-diol
  • Calcium dihydroxide (respirable fraction)
  • Calcium oxide (respirable fraction)
  • Hydrogen cyanide (as cyanide)
  • Nitrogen monoxide
  • Tetraethyl orthosilicate

New 8-hour TWA and short-term exposure limits (STELs) were introduced for the following substances:

  • Acetic acid
  • Acrylic acid
  • Diacetyl
  • Glycerol trinitrate
  • Methyl formate
  • Nitrogen dioxide
  • Sulphur dioxide
  • Hydrogenated terphenyl


New skin notations have been added for the following substances:

  • 1,4-dichlorobenzene
  • Glycerol trinitrate
  • Methyl formate
  • Tetrachloroethylene

The following substances required reductions to the existing WELs:

  • 1,4-Dichlorobenzene
  • Acrolein
  • Bisphenol A
  • Carbon monoxide
  • Carbon tetrachloride
  • Manganese and inorganic manganese compounds
  • Methylene chloride (dichloromethane)
  • Potassium cyanide (as cyanide)
  • Sodium cyanide
  • Tetrachloroethylene
  • Vinylidene chloride
  • A STEL was introduced for:
  • Acetic acid
  • Acrylic acid
  • Calcium dihydroxide
  • Calcium oxide
  • Carbon tetrachloride
  • Diacetyl
  • Diphenyl ether
  • Glycerol trinitrate
  • Lithium hydride
  • Manganese and inorganic manganese compounds
  • Methyl formate
  • Nitroethane
  • Nitrogen dioxide
  • Potassium cyanide (as cyanide)
  • Sodium cyanide (as cyanide)
  • Sulphur dioxide
  • Hydrogenated terphenyl
  • Vinylidene chloride

The European Commission recognises that there may be technological challenges and associated costs for the underground mining and tunnelling industries across Europe in complying with the proposed limit values for nitrogen monoxide, nitrogen dioxide and carbon monoxide.
In recognition of the challenges in these industries the Directive includes an extended transitional period until 21 August 2023 during which Member States may apply national limit values for these three substances in these industries.

During the transitional period, limits for the underground mining and tunnelling industries will be as follows; For nitrogen monoxide a WEL of 30 mg/m3 (25 ppm) as an 8-hour TWA will be used. For carbon monoxide WELs of 35 mg/m3 (30 ppm) as an 8-hour TWA, and 232 mg/m3 (200 ppm) short term (15 minute TWA) are to be used.

These values will remain in place until the end of the 5-year extended transitional period (21 August 2023), when the lower value of 2.5 mg.m3 (2 ppm) for nitrogen monoxide, 0.96 mg.m3 (0.5 ppm) and 1.91 mg.m3 (1 ppm) for nitrogen dioxide and 23 mg.m3 (20 ppm) and 117 mg.m3 (100 ppm) for carbon monoxide will be applied.

Limit values now in place for Nitrogen Dioxide and the change in Carbon Monoxide levels will most commonly affect those looking at vehicle emissions including Diesel and Petrol engines.  

The change in Carbon Monoxide limits will also affect anyone using conventional confined space gas monitors or Carbon Monoxide monitoring instrumentation.  At regular calibration we will update all instrumentation to the newest recommendations on the alarms however should wish for any advice or information on how to change the alarms on your gas monitors give us a call.

Alternatively for the next 3 months we will be offering anyone who wants us to change the settings for them a free alarm setting change at our head office regardless of instrument manufacturer.  Just give us a call to book in your unit and we will get it updated for you.

Safety Monitors are a UK based company but also deal extensively across the world.  They are specialists in Safety, Health and Environmental monitoring instrumentation including Gas, Noise, Vibration, Air Quality and Radon.

 For sales, hire or service requirements please call +44(0)1489 326031 for more information and assistance
or visit www.SafetyMonitors.co.uk