If an OSHA regulated substance is 25,000 times lower than OSHA regulations.......it is also 25,000 times SAFER than that OSHA regulation.
Lower levels of exposure do not translate into equivalent measures of safety.
25,000 times lower does not mean 25,000 time safer and you are misuing the information when you say it is.
(I'll bet you also think that 160dB is twice as loud as80 dB!)