The Recreation Department has purchased four high-tech devices designed to deter geese from spending time on the shores of Lake Massapoag and leaving waste that pollutes the water, Town Administrator Benjamin Puritz told the Board of Selectmen March 20. The devices look like fence posts, stand about 26 inches high, and emit solar-powered light at eye level for the geese, making the beach less appealing to them, he said. The town plans to install them at Memorial Park Beach and Community Center Beach. A fifth device may be necessary to cover the area, Puritz said. Members of the Board of Health have expressed concern about the presence on the beaches of goose feces, which can wash into the water and raise bacteria to unhealthy levels. - Jennette Barnes