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#1 Posted : 08 August 2005 11:12:00(UTC)
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Posted By Vaila Mackenzie
If there is no limit set for a substance in EH40 as an OES, does this mean that the limit is Zero? Having problems getting head round HCN which has MEL but no OES. Any guidance would be great.
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#2 Posted : 08 August 2005 11:33:00(UTC)
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Posted By Paul Leadbetter
Vaila

There has been a change to UK legislation; MELs and OESs have been replaced by Workplace Exposure Limits (WELs). All of the MELs and most of the OESs have become WELs. WELs should be treated like MELs; they must not be exceeded.

HCN has a short-term WEL of 10 ppm.

Paul
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