The city of Wunstorf intends to carry out a large-scale rat control ( Rattus

norvegicus) within the entire city area (a total of 10 districts as well as the core city itself) and an object-related rat control system.

The measure essentially provides for nationwide control measures within the

sewerage, in urban waters and in particularly endangered individual objects.

The entire sewerage system of all districts

(including the core city) has a length of about 383 km, divided into about 190 km of rainwater sewer system and about 193 km of wastewater and combined sewer systems with a total of about 10,000 sewer shaft structures are to be occupied at a first occupancy. There are 54 wastewater and rainwater pumping stations throughout the city, as well as 6 rainwater retention and infiltration basins.

In the more intensive grid-like initial occupancy phase in the first year, every 3 . manhole. The materials offered (bait/preparations) must comply with the applicable standards and guidelines. If necessary, the contractor is required to provide evidence.

Rat control should be carried out in accordance with the guidelines for large-scale rat control in Lower Saxony and includes the infestation survey, the identification of infestation centres, the identification of suitable baits and the active substances that are effective on site, the refilling of the bait as well as the monitoring of success and documentation, which is made available for inspection by the client on request.