It is the construction of a new reservoir for accumulation of rainwater for their subsequent use. The proposed rain tank (external diameter 5400 mm and outside height 3350 mm) will be located on the school grounds parc. No. 428/1, k. ú. Hodkovičky – Jitřní 185, 147 00 Prague 4. The storage tank of 41 m³ will be connected by safety overflow DN200 to the existing sewage connection.