See II.2.4

It is necessary that all street gullies are cleaned 2 to 3 times a year (timing late February, mid-July and mid-October) to prevent clogging.

It should be borne in mind that the frequency may vary per year.

A framework agreement is envisaged for the years 2024-2025-2026 and 2027

(A framework agreement is an agreement for the purpose of laying down, for a certain period, the conditions governing contracts to be awarded, in particular as regards prices and, where appropriate, the quantities envisaged. The unit prices are fixed for a certain period. So there is no total order amount, only an estimate with probable quantities).