It has to do with a new technology for a greener diesel engine, used in Daimler, VW and Audi vehicles - http://en.wikipedia.org/wiki/BlueTec "... a Selective Catalytic Reduction (SCR) catalytic converter will convert the remaining nitrogen oxides to nitrogen and water; so-called diesel exhaust fluid (solution of urea and water) is injected into the exhaust gas stream to enable the conversion." Given the position of the Urea tanks in the drawing, this use is pretty much the only one that makes sense. I would think that requiring this facility to be environmentally conscious is a sort of payback for what the Army Corps of Engineers built out in Tooele - http://en.wikipedia.org/wiki/Tooele_Chemical_Agent_Disposal_Facility There were a number of folks in Salt Lake City that were up in arms about its placement with the idea that a catastrophic failure would have innumerable consequences on the leeward side of the facility. --- A On Sun, Jul 28, 2013 at 8:41 AM, John Young <jya@xxxxxxxxxxxx> wrote: > There are two spaces labeled "Urea Tank Room" in the NSA Utah > Data Center's Generator Plant shown in construction drawings > recently leaked: > > http://cryptome.org/2013-info/**07/nsa-utah-dc/nsa-utah-dc.htm<http://cryptome.org/2013-info/07/nsa-utah-dc/nsa-utah-dc.htm> > > See Generator Plant floor plan drawing 11.2 A101 at bottom and > top left, spaces labeled "UT." > > Urea is used in fuel cells. Are there other uses of urea in generator > or data processing equipment? > > > >