On Sep 3, 2:46*pm, Elizabeth wrote:
We've been trying to kill the bermuda grass in our backyard since last
summer. *We sprayed it with Round-Up 3-4 times, and then took off the
top 1-2" of soil. *We are still having a problem with it coming back
in a few places. *Any suggestions?

This link should be educational and helpful for your problem.
Hope this works!

http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7453.html