Yvelines: after the fire at Siaap, the investigation will finally start


Five days to extinguish the fire and secure the scene. And on Tuesday, Siaap officials and experts will finally access the site that saw last Wednesday smoke huge plastic tanks containing ferric chloride.

Their mission, as explained Jacques Olivier, the director of Siaap, Monday at a meeting organized by the prefect Jean-Jacques Brot to the sub-prefecture of Saint-Germain-en-Laye: assess the extent damage and investigate the causes of this fire.

Evaluating the extent of the damage will help to know when the clarifloculation unit will be rebuilt, where the suspended particles are treated. "It will be long, think Yann Bourbon, the director of the site. But in a few weeks, we will be able to solve the last problem since the fire: the rejections of phosphates. "

Laurent Brosse, Mayor of Conflans: "Three major incidents in less than two years, it is just as new as it is disturbing"

Between Wednesday and Friday, the plant operated in very degraded mode and discharges of water loaded with organic matter in the Seine caused a drop in oxygen, which caused a huge excess mortality of fish.

For the time being, swimming is prohibited in the Seine and from the point of view of fauna, the Siaap organizes the removal of dead fish, following the polluted water mass as it descends downstream of the river. 'factory.

Pollution of the Seine after the fire at Siaap. DR / Manu Desousa
Pollution of the Seine after the fire at Siaap. DR / Manu Desousa

Already 3 to 4 t have been identified and / or collected. "But we could have three to four times more," said a member of the Val-d'Oise fishing federation.

The other part of the work of the experts who access this Tuesday to the site, identify the causes of the fire, is just as necessary, at least to reassure the population.

The numerous elected representatives of Yvelines and Val-d'Oise present at this meeting relayed these concerns. "Three major incidents in less than two years, it is just as new as disturbing", vituperates Laurent Brosse (DVD), the mayor of Conflans-Sainte-Honorine.

Saint-Germain-en-Laye, Wednesday. Odile Tambou
Saint-Germain-en-Laye, Wednesday. Odile Tambou

For Siaap, "this fire showed that our warning and rescue systems were working"

"We give every time all information to the population, in full transparency, promises Yann Bourbon. This fire showed that our warning and rescue systems were working. "

"Fortunately, every time, security systems worked well and firefighters were able to handle the claims," ​​said one meeting participant. But on a Seveso site as sensitive, the best would be that the security conditions are such that never an accident occurs. So, three in 18 months … it's really not reassuring. "


Forty-eight hours of intervention. Called at 16:48 last Wednesday for "an explosion followed by fire", it is a total of 130 firefighters who worked at the height of the disaster, some of whom remained mobilized until Friday afternoon to extinguish the last fires . A particularly large contingent supported by about thirty machines and two lift arms. Problem for the fire soldiers on their arrival: the Siaap fire hydrants were unusable. "We had to go to the Seine with a pump boat. We also used towed motorcycles in the sewage retentions, explains Lt. Col. Christophe Betinelli, commander of the relief operations. These extinguishing waters were retained in the building. His men also had the task of detecting the possible toxicity of the fumes produced. "There were no chlorinated products except for some traces on the site," says the officer.


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