A Burr Ridge businessman will take over immediately to fill a vacancy left on the College of DuPage Board of Trustees after former Trustee Jane M. Herron resigned abruptly during a Jan. 18 meeting. Trustees unanimously approved Joseph T. Snyder, owner of Snyder Insurance Services and Snyder Financial Services of Darien, to fill out the rest of Herron’s term, which runs to April 2009, said Brian Kleemann, a COD spokesman, during a special board meeting Feb. 27.