</font><font color="blue" class="small">( Also, is it OK to chip/shred Sumac? )</font>
I'm guessing you're talking about "poison" sumac, and it's like poison ivy, and oak. It's not advisable to chip it or burn it as the oils are very irritating and anyone who is allergic will be susceptible. Burning it can cause a systemic reaction as the smoke gets into the lungs and this can be very serious. The oils will remain on all your equipment and possibly infect someone for from 1 to 5 years if you don't clean it off completely with something like mineral spirits. Probably would be best to kill the sumac with herbicides and then carefully dispose of it. Cutting it with a chain saw may cause the operator to get plenty of the oils on his/her person, so I'd try to kill it, let it dry out and then carefully break it up and dispose of it either in bags or however your city handles yard wastes. Remember that the killed plant can still infect. John