What tree is this?

So I live in Oregon (NW USA) and there is a tree on my campus that has these beautiful flowers that smell amazing. They are white with five petals and tons of pollen. Here are some pics of the leaves and some bad ones of the flowers. If you could help me that would be awesome.
Pic1
Pic2
Pic3
Pic4

 

Tilia tomentosa (lime tree) clusters of up to 10 very fragrant white flowers.

 

no its not that one but thank you. The flowers are diferent then a lime tree. Also it says that the pollen is toxic to bees but the one i saw is filled with bees

 

is it just tomentosa that has toxic pollen to bees?

http://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/tilia/americana.htm

i found this about Tilia tomentosa (looking at it, it probably isnt tomentosa)

http://www.hort.uconn.edu/plants/t/tiltom/tiltom1.html

 

The pics aren't too clear so I can't see what it is, but it's definitely not Tilia tomentosa, nor any other species of Tilia - the leaf shape and flower colour is wrong. Tilia have yellow-green flowers with very short petals (no more than 3-4mm long), never white nor as large.

 

Styrax japonica or Japanese snowbell, I think. If not, another Styrax species.

 

I did wonder about Styrax japonica, but that doesn't have the coarse leaf serrations shown by the mystery plant. Some Styrax may do, but not any of the species I'm familiar with, unfortunatey.

 

i think clear pictures of the flowers and of the tree would be in order.

 

Definitely Japanese snowdrop. This is common, you can easily verify by visiting a nursery or other places with labeled assortments of popular flowering trees--or just looking at pictures and descriptions in books or on web sites.