trip_sticker
New member
I saw this thread awhile back and remembered it when I recently went to have my cholesterol checked, so I asked my doc to check for lead too. He did and I got the results today. He said my lead count was 2!
He said my lead count was 2!
I found an OSHA letter stating the max lead concentration for an indoor range is 50 micrograms per cubic meter (this should be the PEL, permissible exposure limit, based on breathing this for an 8 hour shift).
At lead's melting point (621F) the vapor pressure is 4X10^-7 Pa (400 parts per trillion)
@815F its 1X10^-4 Pa (1 part per billion)
@1300F it is 1Pa (10 ppm)
So, at 815F that is 12 micrograms per cubic meter, at the molten leads SURFACE, 1/4 of OSHA's PEL (and you KNOW they are conservative!)
870 degrees - 5X10^-4 Pa - 60 micrograms per cubic meter (just above OSHA PEL)
925 - 1X10^-3 Pa - 125 micrograms per cubic meter (2.5 times OSHA's limit for an 8 hour shift).
1000 - .01 PA (.1 ppm) = 1200 micrograms per cubic meter.
1100 (Added in on the edit just because this value was mentioned above) .13 PA - 15,600 micrograms per cubic meter, three hundred times the OSHA guidelines.
I know the above post is 3 years old but a lot of people believe it. You lose lead every time you expel bodily fluids because the lead shows up everywhere, sweat, urine spit, you name it if it leaves your body miniscule amounts of lead go with it. Picked up most of my lead when I was teaching and spent 5-6 hours a week inside an old indoor range. Since then I have lost over a third of what it used to be. Took 30 years but it's gone and I only shoot outdoors now. I cast inside but my pot is under a hood and vented outside with a pretty nice blower sucking up the fumes.Lead doesn't leave your blood system. Unless you lay off to see if your levels don't increase, the amount will not decrease. I would suspect poor ventilation- one reason I hate using indoor ranges
Lead doesn't leave your blood system.
The statistics dont make sense clearly; what is in the air is not in the blood.