Well, it will probably make him feel much better to go through all the steps involved to learn what he wants to know about all of the precise details.
From my training in the Navy about safety and NavOSHA and working in unventilated shipboard voids (holds and tanks and such) his very best bet is going to be increasing the height of the ventilation outlet stack.
An additional eight feet of black PVC piping will increase the dilution rate by several orders of magnitude due to the maths involved.
Getting it all up high enough to mix in well with the moving air above the roof is the answer.
That's why all those old companies with furnaces of one kind or anther had those outrageously tall "smoke stacks"
If this were an industrial setting then we would be talking about millions of times of larger quantities and 24/7/365 and then yeah it will make a difference then.
Statistically, you might could === possibly === "poison an ant in a country the size of the USA over the entire lifetime of your individual glass addiction".
Yes it's true that some of what we work with is hazardous in quantity over extended periods of time but if we limit ourselves to only the absolute safest of things we will never get out of the swaddling cloth our grandparents wrapped us in.
Good luck with this.
If he really wants to capture this stuff effectively what he wants is the charcoal water filter cleaning setup for a really huge (room size) pet fish aquarium.
It needs to be big because of the volume of air that you need to move to keep your bench from being hazardous just to run the torch.
Bubble the ventilation system through the ultra fine sieve stones used to aerate the water and then run the water through the charcoal.
That's the best kind of scrubbers we can get our hands on shy of buying equipment from NASA.
Still leaves the question of what to do with the charcoal once its contaminated.
I guess it could just go to a landfill along with our normal house hold waste because it wont really be any worse than anything else we put there.
It won't become the LOVE Canal after all.
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The Zombie Apocalypse is Upon Us.
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