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Posted By GavinR
Hi everyone,
Can anyone help me please? I'm looking to find a recommended safe level of diesel exhaust fume? We are considering installing exhaust filter to 2 FLT's we have that infrequently enter the shopfloor and stay for short to medium periods of time. I have assessed the risk to be low due to many factors but as cost should not be excessive to fit these FLTs with filters i think it would be best to progress with this anyway. Better safe than sorry!My problem is i can't locate any set exhaust safe levels- maybe i'm being stupid i don't know? Can anyone please point me in the right direction?
Cheers, Gavin
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Posted By Paul Leadbetter
Gavin
Check out HSG187 from HSE - Control of Diesel Engine Exhaust Emissions in the Workplace.
Paul
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Posted By Adrian Watson
There is no known safe level for Diesel Exhaust Gases, principally because it is a complex mixture. However there are standards for some of the components such as diesel exhaust particulate, carbon monoxide, sulphur dioxide and oxides of nitrogen.
The standard in the HSG is a ventilation surrogate.
Regards Adrian Watson
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Posted By garyh A google search produced an instant result which looks helpful - go to http://annhyg.oxfordjour...gi/content/full/48/4/369Basically the advice mentioned above of looking at components would be sensible. I would pick a component you can measure and use that as a marker / exposure limit. The best answer is of course to go "ALARP" however that is not helpful when you want a measurable number to work with.
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Posted By Mike Gavin, Also for more background see the Swedish criteria document http://ebib.arbetslivsin...se/ah/2003/ah2003_16.pdf which concluded that it was not possible to set a health-based limit for diesel particulate. Nevertheless if you want examples of numbers then the German TRK for elemental carbon is 0.1 mg/m3 (8h-TWA, not health-based and not mining application). ACGIH proposed a TLV of 0.02 mg/m3 elemental carbon in 2001 (except mining) but withdrew the proposal a year later. Elemental carbon (EC) is probably the best marker but as Adrian Watson says the recommended surrogate in HSG 187 is ventilation (or carbon dioxide) because EC is the devil to measure. 1) The result is method dependent and any limit value would have to be linked to a very specific procedure which is unusual. 2) There are very few labs in Europe with the coulometric analyser. The authors of the paper mentioned by Garyh were unable to measure EC themselves. They got HSE’s Health and Safety Laboratory to do the analysis. I think they are the only people in the UK with the coulometric analyser and able to offer a service.
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Posted By Innes Gray
i got some details if you want of how good the filters are and what they do with before and after data
will post after christmas is over
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Posted By John Murgatroyd
Reading through the performance/s of various exhaust [diesel] filters.
You may like to consider that you will have to change from red diesel (if, like many, you run liftrucks on it) to low sulphur diesel. I can find little information on the filter performance in reducing the sulphur dioxide levels, plenty on "soot" levels but little on other pollutants present in exhaust gases. Since no news is frequently bad news, in H&S terms, I assume that their performance in reducing the REALLY harmful pollutants is not that good. The sulphur content in red diesel is higher than in "road" diesels.
As far as I can see, THIS post conforms to current IOSH discussion forum content rules. Maybe IT won't be deleted.
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