03Lightningrocks wrote:
Sjfcontrol...
I shoot at the BT quite often and have even taken my family there. After about an hour or so we start feeling like we all took up smoking and have to leave. The ventilation system appears to be holding all the smoke at the firing line. Next time I am there I plan to look for the exhaust to see if it is near the intake air. The air vents behind the range feel like they are putting out air at a pretty good velocity but the smoke just hangs on the line. On busy days it is almost unbearable.
Is it possibly more hazardous to our health there than I may have realized?
Well, I hesitate to comment on specific systems that I have no knowledge of other than what I observed there. I know others have complained about the same thing in this thread and elsewhere. They don't seem to have functional heating or A/C, if they've disabled those, who knows what kind of maintenance they're doing with their filters. (It sounded earlier in this thread that somebody was claiming they didn't have any

)
Keep in mind that there are two locations that tend to collect the most lead dust: in front of the backstop (from when the bullet hits it), and just beyond the shooting line (from being fired). The backstop is too far from the shooter to be of concern, but the shooting line dust IS a concern. A properly designed airflow system will have a continuous stream of air flowing from behind the shooter, downrange. This carries any lead dust away from the shooter. How efficiently that is done depends on the system design, filter maintenance, and the number of shooters at any one time. Also, it is my understanding that even a HEPA filter will not filter out odors, so recycled air *MAY* be safe, even if it is unpleasant. Note that ventilation health problems are more of a problem for employees, than customers, as its an accumulation-over-time issue. And it is generally a good idea for management to keep their employees healthy. Otherwise OSHA and/or state health/disability people become involved.
The only real way to answer your question would be to take air samples during heavy use and have them analyzed. Probably something they wouldn't appreciate a customer doing -- just say'n.
