The Service Manual seems to imply there are more than one.
For removal it says "When removing EGR upper tube assembly being careful not to drop the silicone rubber seal
s in the intake manifold"
For installation it also refers to more than one.
But this online parts site only shows one tube seal, number 6.
The pic is for a 2.7L, but I think they are essentially the same.
These online parts diagrams are not always accurate, especially for seals and gaskets.
http://www.trademotion.com/partlocat...=6&catalogid=2