SADE the outstanding choice for Choisy…
…to rehabilitate a large retention tank in the event of H2SO4 accidents.
Veolia Eau d’Ile-de-France (VEDIF), delegate of the Ile-de-France Water Authority (SEDIF) is responsible for ensuring the public water supply service, in addition to the maintenance of the Authority’s heritage network.
In this regard, VEDIF called on the Civil Engineering and Special Works Agency of the Rennes Regional Division to carry out the tanking by Hydroclick® of the emergency retention basin, located under the two 60m³ sulphuric acid tanks (H2SO4) of the Choisy-Le-Roi water production plant. The Ivry-sur-Seine Agency (Paris Regional Division) also intervened in these works.
The power of social media…and SADE references
It was while searching for providers capable of tanking operations using acid-resistant plates that the VEDIF project manager discovered SADE’s Hydroclick® process on LinkedIn.
As a reminder, this process consists in lining the civil engineering facility in question with HDPE plates welded by extrusion. The manager contacted the Civil Engineering and Special Works Agency of the Rennes RD, and a quote was prepared. The competitiveness of the solution and our long list of references thanks to 15 years of experience in this process placed SADE ahead of the crowd.
Worksite data
In 5 weeks, the teams lined the floor surface, sump pit (1m³), walls and 10 posts (15m high) of this 96m² emergency retention tank (15m x 6.4m). In all, 220m² of plates were carefully cut, adjusted, clipped and welded by extrusion.
Prior to this, the Ivry-sur-Seine teams treated the concrete structure of the severely acid-damaged sump pit. To detect and measure potential rises from the water table beneath this facility, a vertical 225mm-diameter and 1.5m-high HDPE tube, equipped with a probe, was placed in the sump pit. To ensure our teams’ safety, the acid tank had of course been emptied and cleaned.