I'm trying to identify a font that looks very close to Univers on the EPA website. I have to create a banner that matches the dark blue headings you see on these two links:

http://www.epa.gov/smm/ - "Sustainable Materials Management"
http://www.epa.gov/fgc/ - "Federal Green Challenge"

the letters that are particularly hard to match are the lowercase a, t and g. It looks close to Univers, but I'm not 100% sure.

Thanks for the help