He has all the proper vents, and scrubbers in place, but the city
wants specifics on the fumes before and after they vented into the
If he already has a functioning business with scrubbers, etc. in
place and he's not going to be doing anything different, why did he
ask his local government for permission?
I mean, sometimes it is better to be under the radar. Government
regs are so voluminous, it can take forever to find the one small
paragraph relating to your question. As for me, I'm always melting
down gold and silver scrap and milling it. I use my vent, borax, a
crucible and an ingot mold. There are some fumes, but I find it is
more of the impurities and any old crud that is stuck on old gold,
and my vent, plus an air purifier takes care of the fumes issue.
Never had any problems and no complaints so far.
As for regs, fire departments really don't want you to have tanks
indoors, and will put up all kinds of obstacles to prevent you or
deter you from installing torches and tanks indoors. I remember
helping the local high school get set up for jewelrymaking, and it
took about a year to satisfy the fire department and Maintainence
with the torch setup. Now that a state-wide craft organization is
going to set up a jewelry/lampworking lab next year, the educational
coordinator wants me to come with her to the fire department to get
"permission" to have tanks. The vent is in place, so that is all set.
I'm not looking forward to the battle.