Along with all the construction work being carried out during the reconstruction of the building, a fairly good volume of construction debris has accumulated. We sorted this debris and placed it to the part of the cellar, which must be filled up. Before that, we have concreted the windows in the cellar. At the top of the debris, we placed a layer of crushed stone, which will be later compacted, and a base plate will be constructed above it. Before concreting the base plate, however, we still must place gullies for stainless steel box drains into their positions and install a sewer pipeline.