To take delivery of soil for processing, Belgarena has invested in the construction of a 7,500 m² post-tensioned concrete slab that is unique in Wallonia. This slab is made all of a piece and is completely water-tight. Moreover, it has been placed on two welded polyethylene geomembranes with a leak detection system sandwiched between them.

All water running off the slab is collected in a mud separator/sand trap/separator complex before being tested and discharged into an infiltration pond.