(b26009-5) New construction intervention center Zoll St. Margrethen / BKP 250

Plot number 3396 is located in St. Margrethen SG in the immediate vicinity of the A1 motorway and the border with Austria. The Federal Office for Buildings and Logistics (BBL) is planning to build an intervention center (IVZ) with several parts of the building on the site. The construction project includes a main building and several ancillary buildings with associated technical systems and infrastructure. Water supply Fresh water is supplied by the Technical Works of St. Margrethen. The water hardness in St. Margrethen is on average 17.3°fH, so no water treatment was planned. Dirty water The contaminated wastewater is connected to the St. Margrethen Technical Works. Due to the geometric situation in the building, the drainage takes place via various transfer points to the surrounding sewer system. The processing of the dirty water from the building boundary is carried out by the pipe planner and is not part of the plumbing trade. Rainwater The rainwater that occurs on the roof of Building C, which is covered with photovoltaic modules, is collected in a rainwater tank in the 1st basement of Building C. When the tank is at capacity, the rainwater is channeled into the infiltration areas on the site using a natural gradient. The remaining rainwater from the non-accessible roof areas is also directed into the infiltration system on the area. On the roof of building A there is a roof garden, which is accessible. This “polluted” rainwater is channeled into the wastewater. The processing of rainwater from the edge of the building is carried out by the pipe planner and is not part of the plumbing trade. Gray water use In the 1st basement of Building C there is a rainwater tank for collecting rainwater from the roof drains in Building C. A pressure booster system is used to feed a gray water network, which is distributed to all parts of the building. The gray water is used to flush toilets