The EIF site, covering 9,453 m², hosted dry cleaning and skin treatment activities from 1870 to 1970. The use of benzine and later chlorinated solvents (perchloroethylene) led to soil, groundwater, and soil gas pollution. In 1972, the company EIF took over the site for fabric recovery activities without chemical use.
In 2012, the Établissement foncier d’Île-de-France (EPFIF) purchased the property. Environmental investigations revealed significant pollution from chlorinated solvents (Tetrachloroethylene, Trichloroethylene…) and BTEXN (Benzene), as well as metals (Cr, Cd, Pb, Zn, Cu). Following the abandonment of a redevelopment project in 2020, the EPFIF, in agreement with the City, decided to proceed with decontamination.
From 2014 to 2019, the site was monitored by the Prefecture, with oversight of various environmental media. Complementary studies defined the decontamination method chosen in 2020: in-situ treatment via multi-phase extraction and venting, while preserving existing buildings.
Decontamination work, delayed by site occupation, began in January 2023. Continuous environmental and health monitoring is conducted by the EPFIF and the City of Montreuil, supported by the Institut Écocitoyen pour la connaissance des pollutions (IECP) from Fos-sur-Mer. Regular meetings are held to inform local residents.
The decontamination process, running from March 2023 to September 2024, extracted 7 tons of COHV and BTEX. However, rehabilitation goals have not yet been fully met due to the soil's specific characteristics. Decontamination will need to continue with a process currently under study.
