The owners of the planned Tradewinds Variety, a gas station and convenience store with a drive-through Dunkin’ Donuts, is holding a ground breaking ceremony at the junction of Route 46 and Route 9 at 10 a.m. today. Co-owners Blaine Whitney and Chuck Lawrence have invited local town officials and residents to attend the event for the 4,800-square-foot store, which also will have a Quizno’s sandwich shop, Lawrence said Saturday.