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Posted on 06/27/2020 8:27:59 AM PDT by ransomnote
I agree
Allowable concentrations For contaminants consisting primarily of particles with mass median aerodynamic diameters (MMAD) of at least 2 micrometers, an air-purifying respirator equipped with any filter certified for particulates by NIOSH.
(less than 3,001 feet Altitude = 16.0 to 19.5)
Less than 3,001
3,001-4,000
4,001-5,000
5,001-6,000
6,001-7,000
7,001-8,0001
16.0-19.5
16.4-19.5
17.1-19.5
17.8-19.5
18.5-19.5
19.3-19.5.
1910.134(d)(2)(iii)
All oxygen-deficient atmospheres shall be considered IDLH. Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II of this section (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used.
This is referring to the table I just referenced.
OSHA allows atmosphere of 16.0 to 19.5 without out supplemental oxygen. This includes a factor for the use of a respirator.
Your data is excerpted without a link, without sufficient context and is apparently unrelated to OSHA requirements per this article.
“Your data is excerpted without a link, without sufficient context and is apparently unrelated to OSHA requirements per this article.”
Are you referring to the original article which states falsely OSHA requirements?
I didnt provide a link since your referenced letter points to the CFR section.
I cited OSHA standards that confirms the post at the top of the thread using text that apparently hurts your feelings. Why don’t you post big red text somewhere else for awhile?
“I cited OSHA standards that confirms the post at the top of the thread using text that apparently hurts your feelings. Why don’t you post big red text somewhere else for awhile?”
No. You cited a letter. Note that the letter also states:
“Therefore, in addition to the protection afforded to them by altitude acclimation, OSHA’s Respiratory Protection Standard ensures that employees working under oxygen-deficient conditions at altitude will have an adequate and reliable breathing supply consisting of 19.5 percent oxygen, an oxygen content that will provide the employees exposed to these conditions with a substantial margin of safety.”
Thus, since 19.5% provides a substantial margin of safety then one cannot conclude that any concentration below 19.5 is unsafe.
“I cited OSHA standards that confirms the post at the top of the thread using text that apparently hurts your feelings. Why don’t you post big red text somewhere else for awhile?”
OSHA allows 19.3% at 8000 feet. That is less oxygen than 15% at Sea level.
“I cited OSHA standards that confirms the post at the top of the thread using text that apparently hurts your feelings. Why don’t you post big red text somewhere else for awhile?”
OSHA allows 19.3% at 8000 feet. That is less oxygen than 15% at Sea level.
Wut? It’s not in red text and giant letters so I can’t take it seriously.
OSHA’s text is plainly written - let the public decide what it means.
“OSHA’s text is plainly written - let the public decide what it means.”
No. OSHA and company experts decide.
Thank goodness the uneducated dont decide.
“OSHA’s text is plainly written “
And it says 16.0% is allowable for an atmosphere-supplied respirator.
https://sms.asu.edu/sites/default/files/safetygram-17_o2_deficient_atmospheres.pdf
"Workers can become asphyxiated by exposure to atmospheres deficient of oxygen, that can lead to serious injury or loss of life. Oxygen is the only component of the air we breathe capable of supporting life. Air is composed of approximately 21% oxygen, 78% nitrogen and other trace components. Asphyxiation is the greatest hazard associated with nitrogen and other inert gases, such as argon and helium. However, the addition of any gas, except oxygen, to air reduces the oxygen concentration through displacement and dilution. Breathing as little as one or two breaths of air containing too little oxygen can have serious and immediate effects, including unconsciousness. Because there are no warning signs of reduced oxygen concentrations, these environments are extremely dangerous"
~~~~~~~~~~~~~
Did you notice that the video test was taken seconds within donning the mask and not walking around a grocery store for half an hour? I know I did.
Looks like 12% would be an unsafe level.
“Did you notice that the video test was taken seconds within donning the mask and not walking around a grocery store for half an hour? I know I did. “
Did you notice that they breathed right on the monitor?
Besides, even if the mask retains the 17% that will be only about 10% of your inhalation volume resulting in an inhaled concentration of greater than 20% oxygen.
Or are you actually proposing that he endangered the kids lives for this photo-OP?
R-note....please stop trying to offer cover to U.S. workers!
There is no reason why they can’t keep right on slugging away, day after day, with...
Impaired thinking
Increased pulse
Breathing rate increase
Reduced coordination
Reduced strenuous capability
Reduced INTELLECTUAL performance
Possible permanent heart damage
Fainting (Get up and finish that project!!)
Vomiting (Clean that mess up and finish your work!)
Now, put on your mask and get back to work.
What? It’s covered in barf? Too bad! Get back to work!
/////////SSSSSSSSSarc
Your chart starts at 19.0%. Are you now saying 19.1% is safe with no effects?
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