James SCHWEERS, McDonald police chief, has resigned and terminated his active duty last Friday. Lyman BELLAIRE, McDonald mayor, announced the chief's resignation last week and reported that Sgt. Bruce BARNHAT has been named acting chief until a successor is hired. Chief SCHWEERS had held the position in McDonald since April 15, 1979, and had served previously on the Upper St. Clair Township police force. He reportedly is moving to Florida.