Notre Dame Cathedral burned down on April 15, destroying the towers and parts of the roof. Tons of lead from the building melted out of the fire, and the particles spread in the surrounding areas.
The renovations to the cathedral were suspended on July 25 to improve the protection of workers from lead contamination. Equipment and procedures are installed to ensure the safety of workers and to better control access to the site so that no environmentally harmful elements can escape.
"Our priority is to protect workers working on the site from danger." Paris prefect Michel Cabot said. "With new safety protocols and the delivery of two new decontamination units, the quality of lead decontamination of workers, machines and equipment is optimized, so the site will continue to power up safely."
Detergents will use an absorbent gel and high pressure water jets to clean the area of lead, dust and other precipitate fire.
President Emmanuel Macron has set himself the goal of completing the renovation of the 850-year-old building over a five-year period, and about 850 million euros ($ 955 million) has been committed to the restoration of the cathedral.