“Early Oxygen Rich Atmosphere? Origins of Sulfur in Rocks Tells Early Oxygen Story, Science Daily, April 2009. “
Those are the ‘allowable changes’. Those are the required production tolerances.
Paste error ...
I was tired and being lazy.
Yes, those are production tolerances. Frankly, as written, that’s what the 12.5-13.5 PSI would be too. I’m guessing there’s an extension of that somewhere.