As per Osha, in a confined space, less than 10 percent LEL is considered safe
NO. 0.45% is not less than 0.01 %.
I'm a Native New Yorker. My vote is it is not any more or less safe than normal.
No, it is not.
NO. 1 percent is less than 5 percent.
5 percent is less than one half
1 percent is less than 25 percent. 1 percent is greater than 0.25 percent.
less than that vehicle that you drive everyday