Man I hate Pampass Grass. I just got lucky the other day. Went to remove one and it popped right out. Thought I had died and gone to heaven. If you can get a Mini excavator in, they work great, although that would greatly increase you costs on the job. If it's one or two,, digging works best. I usually sharpen my shovel blades so they'll cut right through the roots, and don't forget to call Miss Utility!