Abstract: A leak detection mat arrangement includes a base member configured to capture, direct and hold liquid while at the same time providing a support that is generally planar. The base member includes a bottom side and an upper side. The upper side includes a plurality of projecting portions separated by a plurality of recessed portions. When the bottom side of the base member is resting on a horizontal surface, the recessed portions are sloped to direct liquid toward a liquid capture zone of the upper side and the projecting portions have top edges that lie in a substantially horizontal common plane for stably supporting one or more items. At least one sensor is located in the liquid capture zone for detecting presence of liquid in the liquid capture zone.