Mountains of all kinds of rubbish stretching along the path, or in the open field.
There would be more than 6,000 tons piled up over three hectares straddling the communes of Boissy-l'Aillerie and Puiseux-Pontoise.
Appeared in just five months between the end of 2017 and May 2018, this wild landfill is currently one of the most impressive in Ile-de-France.
But this nightmarish sight should be just a memory three years from now.
And this without the community having to spend a penny.
In any case, this is the promise of the agreements concluded between the Cergy-Pontoise agglomeration community, the Vexin center community of municipalities and the ECT company.
The latter specializes in the reuse of earth excavated during construction sites.
It is by taking charge of this material to be evacuated that the company will finance the cleaning of the site.
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"I think this operation could inspire other communities facing the same problem", welcomes the president (PS) of the agglomeration Jean-Paul Jeandon.
"It was the only solution," said Michel Guiard, the mayor (SE) of Boissy-l'Aillerie at the head of the community of municipalities Vexin center.
"It is a good solution to a problem which should not however exist", adds Thierry Thomassin, mayor (SE) of Puiseux-Pontoise.
To wipe this open dump off the map, it would have been necessary to find several million euros in funding.
"It will take several months to remove the rubbish"
A financial challenge that does not scare the ECT company.
The Ile-de-France company already has some remarkable achievements to its credit.
From inert lands, she shaped a stadium dedicated to trials and mountain biking in Epône (Yvelines), created an arboretum in Moissy-Cramayel (Seine-et-Marne), or participated in the installation of a photovoltaic power plant in Annet -on-Marne (Seine-et-Marne).
“We process fifteen million tonnes of soil per year,” says Guillaume Pasquier, group development director.
But Puiseux-Pontoise represents a somewhat extraordinary challenge for ECT.
Because before remodeling, it will be necessary to clean this site entirely covered with waste in pharaonic quantities.
“It's a colossal project,” blows Claire Didier, project director.
It will take several months to remove this rubbish that comes from industries such as private bins.
In the middle of the piles, we even find asbestos.
The Boissy-l'Aillerie landfill has taken on impressive dimensions over time.
It is however relatively recent since its appearance dates from 2018. Timelapse and go / ECT
Value what can be and bury the rest
This giant wild dump was born during an illegal occupation of the land.
The 300 people who had invested the agricultural land will be evicted in May 2018, but a few months were enough to create piles.
The situation then only deteriorated, one wild deposit calling another.
The mission entrusted to ECT will initially consist of sorting on site "to identify what can be directed towards recovery channels and bury the rest in approved storage centers", explains Claire Didier.
To finance this big cleaning, the company sells its services to construction industry players who need to dig.
And therefore to evacuate inert lands.
The cost of cleaning promises to be exorbitant, it will be necessary to accommodate a lot of soil.
The Puiseux-Pontoise site will therefore become more hilly than it currently is.
"But we guarantee a good integration into the landscape of the project", promises ECT.
The land will be cultivable again
A new natural space, partly wooded, will be recreated, mainly on the plots located in Puiseux-Pontoise and whose owner is none other than the agglomeration of Cergy-Pontoise.
But 70% of the site is in the town of Boissy-l'Aillerie and belongs to a farmer.
Which obviously could never have financed a waste disposal.
“Neither the municipality, nor the inter-municipality can ensure such a cost, underlines the mayor Michel Guiard.
We have been working for a year and a half with the Val-d'Oise prefecture on this solution with ECT.
"
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Ultimately, the lands of Boissy-l'Aillerie will be cultivable again.
"Among all the inert earth that we receive, we select those with the best quality," explains the project director.
We mix it with compost for the top layer.
The company specializing in this kind of realization assures us.
“There is an intense microbiological activity which resumes in a few months, overall it grows very well and you get something pleasing to the eye in a few years.
"
Start of construction in 2022
But before nature reclaims its rights, trucks will unload inert land for about two years.
"We are thinking of recovering a lot from the sites of the Cergy-Pontoise conurbation," predicts Guillaume Pasquier.
The goal is that these lands do not travel too long, it is much more environmentally friendly.
"
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The backfilling will however not begin before the course of the year 2022. For the moment, ECT is in the process of refining the last elements of the project before applying for a development permit and making an environmental authorization file in the spring. .
"We hope to obtain the authorizations at the end of the year", announces the company.
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