AllOtsego People Local radio legend announces retirement By PATRICK DEWEY • Special to www.AllOTSEGO.com ‘Big Chuck’ D’Imperio, seen at a recent book signing, is retiring from local radio after more than 50 years. After 32 years, local radio legend Chuck D’Imperio turned off the microphone on his WDOS morning show for the last time Tuesday, June 29. The retiring radio host got his start in 1988 at what was then Hastings Broadcasting in Oneonta. The best offer owner Gordon Hastings…