The subject of my work is to lower construction site waste water treatment plant Křelov - Břuchotín. In more detail, I focused mainly on the implementation of the circular tanks sewage treatment plant. These tanks prescription processing technology formwork and concreting circular tanks. It also contains a technical report, technical report building equipment, a study of the main technological stages of the building, site, design of mechanical assembly, inspection and test plan solved the technological regulation and scheduling.