Explore our photo gallery dedicated to the manufacture and installation of the fertile substrate for the future Parc du Sempin in Chelles. These images illustrate every stage of this innovative process, from the preparation of green waste compost and inert soil from the construction industry to their mixing and application on site. Find out how our teams transform these recycled materials into fertile soil, ready to be planted in the park.
July 2024, production of fertile substrate at the Chelles site

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Nicolas Martins, backfill foreman, a career in the field
Nicolas Martins, backfill team leader, joined ECT in 2013 on a four-week fixed-term contract. Since then, he has progressed from reception agent to backfill team leader, specializing in active backfill
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In 2024, ECT planted 6.5 ha of afforestation
To mark the International Day of Forests, ECT is highlighting its reforestation actions. During the 2023/2024 winter season, our teams planted 10,300 trees, representing 6.5 hectares of forests and groves.
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ECT’s Green Spaces team, a commitment to the heart of nature
The design and implementation of our landscaping projects include a strong emphasis on the restoration of natural environments: wooded embankments, shrub borders or meadows. Once the inert soil has been
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