From the year 2000 onwards, all public activities were temporarily stopped because the city had decided that the soil had to be cleaned from all the toxins that were still stored underground. 

The purification process took three years to be done.

^{V Dormidontova e A Belkin, «The Use of Post-Industrial Areas in the Formation of the Recreational Environment of the City», IOP Conference Series: Materials Science and Engineering 463 (31 dicembre 2018): 032091, https://doi.org/10.1088/1757-899X/463/3/032091.}

^{Fabio Di Carlo, Alfonso Giancotti, e Luca Reale, «Re-Inventing Water–Ground Relations in Landscape Architecture Projects», Sustainability 12, fasc. 24 (11 dicembre 2020): 10358, https://doi.org/10.3390/su122410358.}