Definitely not a Linden or Poplar, they have simple leaves. These are compound.
http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=384
This is the only ash I've found that has leaves as wide as the photos.
http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=384
This is the only ash I've found that has leaves as wide as the photos.