It looks like the grubbing has been completed on the entire area that the excavation and slab will be laid. The plants and roots in this area have been removed to create organic material free soil for the next step of construction - excavation. Excavation will be done by the cut and fill method. The pad area is at the center of the excavation, and a large uphill from the pad will be cut by a tractor, and filled below the pad to create a level surface for the pad itself.