We then constructed the masonry retaining walls and reinforced them with rebar / filled solid, creating the upper room. We back filled the walls with a cement mixture to prevent settlement. After the walls were up we installed our WaterGuard product around the entire perimeter (upper and lower) with a vapor barrier and drainage matting. A SuperSump with UltraSump were installed in the same location as the existing pump (a second pump was abandoned). We then poured the floors. After the slabs were poured for a couple of days we installed the SaniDry Sedona and drained it into the pit.