Site Investigations North Killingholme, Doncaster - Welcome to the North Killingholme Site Investigations Directory listing recommended site investigation companies in North Killingholme. It lists those who offer site assessments and site investigations in North Killingholme, Doncaster. Do you have a North Killingholme site investigation business? If so, why not advertise it on the North Killingholme Business Directory - IT'S FREE.