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