Ridgefield will begin surveying ash trees, and will ultimately remove the dead ones. In September members of the Community Emergency Response Team and other volunteers will hit the streets looking for dead trees, which can become hazardous, threatening power lines and roads.  The Ridgefield Office of Emergency Management will inform residents of the dates of the scouting and what to expect when volunteers are looking at the public right of way.  An email address is being set up to give Ridgefield residents an opportunity to report trees directly.  Trees on private property are the responsibility of the homeowner.  Ash trees have fallen victim to the emerald ash borer, which first appeared in Connecticut in 2012.  The pests have been gradually decimating the ash population across the country.