REVITALISATION

Revitalisation work has allowed stopping the process of secondary dust emissions

which is a frequent phenomenon in post-industrial sites and prevented the migration of heavy metals. For the purpose of site proper dehydration, a rainwater and sanitary drainage system has been built. Before the establishment of the complex, plant habitats were few and very poor, with ruderal characteristics. Nowadays, greenery areas are characterised by high diversity, and a selection of species that have been made on the basis of their native character and ability to extract heavy metals from the soil, so-called phytoremediation. The entire investment project has allowed changing the content of heavy metals in the substrate and provided for protection of local landscape values, developed by both man and nature. Except for obvious aspects of revitalisation, mention should also be made of social and economic parts that among others include restoring the economic use of areas with high investment potential, creating new jobs, strengthening the site safety through investing, more lighting, and fencing, limiting areas of uncontrolled collection of waste.

GPP Business Park as an innovation and entrepreneurship development zone

is a model example of revitalisation of post-industrial sites. The complex has been erected on an edge of a waste dump, a so-called foothill of the previously existing waste heap on which metallurgical slag had been stored. The process of creating the zone was initiated in 2004, when the reclamation of 25 ha of post-industrial areas began, which means the management of 4 million tons of metallurgical slag during 4 years of operation. Development should be understood here as its utilization or reuse of tested raw material as a building material. Use of slag in construction was primarily driven by a possibility of using so-called mattresses mainly in embankments protecting roads as slag does not interact with water. Apart from cleaning works aimed at the removal of slag, abandoned post-mining areas in the zone were filled in and soil subsidence was prevented through the exchange of several dozen thousand cubic meters of soil and stabilisation of the area was done by means of backfill and injection works and the use of gravel piles to strengthen the foundations. Earthworks started that part of the revitalisation that is seen with a naked eye: site hardening and creation of a biologically active part in the form of lawns and green roofs, and erection of sustainable and highly energy-efficient office buildings, too.