Using IEQc4.1 template version 4.0, in the notes under table IEQc4.1-1, the note #1 states "in the case of aerosol adhesives, the project team must provide a conversion of both the product VOC content and the corresponding allowable VOC limit from percent by weight (excluding water) to grams per liter (excluding water) based upon the density of the product". How do I do this calculation? The product is a spray adhesive w/ 42 g/L and solids content of 20 - 40% weight. The product is a Greenguard Children and Schools Certified product by 3M. Thanks for any assistance you can provide.
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Yukari Treible
Project AdministratorAshley McGraw Architects, D.P.C.
4 thumbs up
October 12, 2016 - 11:11 am
%VOC by weight essentially reports "how much of this product's total density counts as VOC?" So to convert it into a density measure, you would take (% VOC by weight)/100 and multiply it by the product's total density. You should do this for both the allowable and the actual content.
I think the solids content measure is more relevant to PM emissions, but I could be wrong about this. Regardless, I recommend you contact the product manufacturer to find allowable %VOC and actual %.
This doesn't seem to apply to your case but it might to others: if you are not given density but instead given specific gravity, you can convert sg to density in g/L by multiplying it by 1000 and tacking on the g/L unit.
This is because specific gravity is a ratio of density (g/mL) over the density of water at 4*C (g/mL). The density of water is 1, so multiplying specific gravity by 1 g/mL will give you the unit. Then you multiply by 1000 to turn g/mL to g/L.
I just learned this as well, and I found ADEQ's "How to Use an MSDS or Product Data Sheet for Air Emissions" article to be somewhat helpful. But watch out for how it lists everything as pounds/gallon instead of grams/liter.
Hope this helped!