This Decree concerns the protection of the soil from polluting substances and works that deteriorate the quality of soil. The Decree prescribes rules for the use of construction materials and defines methods to measure effects on the environment and in particular the subsoil groundwater. Other rules concern use of dredging materials, also in agriculture. The Decree defines specific standards for use and storage and makes provision for control and enforcement. It also applies to sludge used by agricultural enterprises as defined by article 1 of the Fertilizers Act.