For the realization of the 4th purification stage intended the natural Stadtentwässerung Pforzheim, tender planning services in a Europe-wide contract award procedure in accordance with the provisions of the VOF and gradually to instruct. All planning services (especially for civil engineering structures, technical equipment, structural engineering and other planning services) to a total of - subject to the discretion of the self Stadtentwässerung Pforzheim to call for a portion of the advertised performance levels - awarded to a general planner werden.Die holistic integrating a master planner was selected in order to avoid technical interfaces in the planning and bundle responsibilities for the feasibility of the plan in one hand. The self Stadtentwässerung Pforzheim makes the implementation of the project depends on the results of the cost calculation and the granting of public funding. Therefore, a construction decision for realization of the project is not yet available. It is so far also still unclear whether a building permit and / or a water permit required for the project. Subject of the advertised - and charged with awarding a contract - Performance level 1 are planning benefits the power phase 2 and phase 3 performance for all project components (especially engineering structures, technical equipment, structural engineering). Subject of the power stage 2 are as required planning services the power stage 4, which would be required for approval of the project. Subject of performance level 3 design services of power phases 5 to 8 of the power images of Structures, Technical Equipment and performance phase 5 to 6 during performance image structural engineering. Subject of the power stage 4 is the power stage 9 of the images of Structures and Technical Equipment.