Bolzano (industrial zone)

The site covered the areas of five plants in the Bolzano industrial zone: Aluminia 1, Aluminia 2, Enel, Magnesio and Speedline. SENTIERI classes it as a site with a plant producing aluminium and magnesium.

Listed in 2001 and given a perimeter in 2002, in 2013 it passed from the Ministry to the Autonomous Province, together with sixteen other sites. The provincial environment agency reports it as remediated, with a certificate of completed remediation.

According to the ministry's 2001 site sheet, the Aluminia works, built in the early 1930s, made aluminium from bauxite until 1991. Fluoride-rich sludge was heaped in the yards before going to landfill, and furnace residues were spread over the south-east of the works in layers about three metres thick. The main pollutant is fluoride, present in cryolite, which reached the environment through fumes and dust, through leachate from slag heaps and from demolition rubble used as fill, and through leaks from the sludge settling tanks. The Magnesio works, active from April 1938 to February 1992, made magnesium, calcium carbide, iron, silicon and barium oxide; from 1983 its process residue, dicalcium silicate, was stockpiled inside the works. In 2001 the clean-up of the two areas was estimated at about 40 billion lire.

The sources consulted do not describe the techniques used in the clean-up.