14.07.2023 r.
On July 13, 2023, the foundation act commemorating the expansion of the wastewater treatment plant in Sulejówek with elements of the biological treatment unit was embedded in the foundation slab of the secondary settling tank.
As the memory of human things fades,
therefore, it is right to make a habit of recording important events in writing,
to pass on their meaning to future generations.
The document was signed by Investor - Mayor of the City of Sulejówek and Contractor - Instal Warszawa.