We have a gorgeous old ash tree in our yard that has a 67" diameter. I got quotes from a few companies yesterday to take care of some work on other trees in our yard, and one of the consultants (a certified arborist) mentioned that there's an infestation of Emerald Ash Borers that started in Michigan and is reaching our area in southeast PA. He gave us a quote for $335 for treatment, and I definitely knowd that this would be vastly cheaper than trying to take down a huge old tree near streets and power lines. Has anyone dealt with this with ash trees (or similar infestations) that is willing to share their experiences? If so, does this quote seem reasonable?