Welcome Guest! The IOSH forums are a free resource to both members and non-members. Login or register to use them

Postings made by forum users are personal opinions. IOSH is not responsible for the content or accuracy of any of the information contained in forum postings. Please carefully consider any advice you receive.

Notification

Icon
Error
STEL'S & LTEL'S - MMMF
Options
Go to last post Go to first unread
Previous Topic Next Topic
Stockley25244  
#1 Posted : 26 March 2020 08:15:41(UTC)
Rank: New forum user
Stockley25244

In EH40 there is a LTEL for MMMF but no STEL can someone help me get my head around this

In a nutshell this is not an isolated substance that has this? Please enlighten me fellow IOSHians

Alan
Back to top
RVThompson  
#2 Posted : 26 March 2020 08:33:12(UTC)
Rank: Super forum user
RVThompson

LTELs are designed to control the longer-term, or chronic, effects of a substance, whereas STELs are designed to control short-term, or chronic effects.

Back to top
thanks 1 user thanked RVThompson for this useful post.
Stockley25244 on 26/03/2020(UTC)
Roundtuit  
#3 Posted : 26 March 2020 08:40:12(UTC)
Rank: Super forum user
Roundtuit

In the current (February 2020) edition of EH40 you will find an answer on the page numbered 28:

For those substances for which no short-term limit is specified, it is recommended that a figure of three times the long-term limit be used as a guideline for controlling short-term peaks in exposure.

WEL's are scientific determinations - not every substance will have every scenario tested as either an eight hour or 15 minute exposure.

In practical use not every susbstance exposure is either 8 hours or 15 minutes which is why they should never be target control values rather values that should never be exceeded - target zero
Back to top
thanks 10 users thanked Roundtuit for this useful post.
RVThompson on 26/03/2020(UTC), Stockley25244 on 26/03/2020(UTC), Kate on 26/03/2020(UTC), A Kurdziel on 26/03/2020(UTC), Kim Hedges on 29/03/2020(UTC), RVThompson on 26/03/2020(UTC), Stockley25244 on 26/03/2020(UTC), Kate on 26/03/2020(UTC), A Kurdziel on 26/03/2020(UTC), Kim Hedges on 29/03/2020(UTC)
Roundtuit  
#4 Posted : 26 March 2020 08:40:12(UTC)
Rank: Super forum user
Roundtuit

In the current (February 2020) edition of EH40 you will find an answer on the page numbered 28:

For those substances for which no short-term limit is specified, it is recommended that a figure of three times the long-term limit be used as a guideline for controlling short-term peaks in exposure.

WEL's are scientific determinations - not every substance will have every scenario tested as either an eight hour or 15 minute exposure.

In practical use not every susbstance exposure is either 8 hours or 15 minutes which is why they should never be target control values rather values that should never be exceeded - target zero
Back to top
thanks 10 users thanked Roundtuit for this useful post.
RVThompson on 26/03/2020(UTC), Stockley25244 on 26/03/2020(UTC), Kate on 26/03/2020(UTC), A Kurdziel on 26/03/2020(UTC), Kim Hedges on 29/03/2020(UTC), RVThompson on 26/03/2020(UTC), Stockley25244 on 26/03/2020(UTC), Kate on 26/03/2020(UTC), A Kurdziel on 26/03/2020(UTC), Kim Hedges on 29/03/2020(UTC)
Users browsing this topic
Guest
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Powered by YAF.NET | YAF.NET © 2003-2024, Yet Another Forum.NET