• Excavation is the material below the topsoil and subsoil

• Excavated material consists of rock and stone that is broken out of the ground mechanically or by blasting as part of the construction work

• Excavation may also contain fines depending on geology

• Floors are the basis for the load-bearing capacity of every building and are the central component of the foundation and are planned and developed first

• Excavated and excavation material is produced during the excavation of building foundations and consists of soil: crushed rock and boulders or loose rock, gravel and sand

• If the construction site is located on an anthropogenic site, the excavated material may also contain other components such as mineral construction waste or the remains of old waste deposits

• All typical types of soil are included in the Ökobaudat/KBOB and are treated in the same way, e.g. loamy soil, sandy soil, clay soil, etc.

• Separate containers for construction waste Separate life cycle assessment

• Request weighing certificates from the landfill site

simplified per m³:

• Module A5 Installation takes into account the diesel consumption required for soil excavation (0.3091 kg diesel per m³ of sandy soil) and the associated emissions: Carbon dioxide, carbon monoxide, nitrogen oxides, NMVOC, dust particles, sulphur dioxide.

• Data set takes into account neither excavator production nor disposal of the excavator

CO₂ emissions module A5: 1.34 kg

• Module A4 Transport refers to the transportation of 1 t of goods over a distance of 1 km by Euro 5 truck with 20 - 26 t gross vehicle weight and 17.3 t payload and 85 % capacity utilization

• Extraction and processing of the fuel is included

• Manufacture of the vehicle is not included in the balance sheet

  CO₂ emissions module A4: 0.09213 kg/tkm

• At around 50 million tons per year, excavated material is by far the largest volume of waste in Switzerland

• transportation is associated with high emissions

• disposal takes up a lot of space in gravel pits and landfills

• may be contaminated with various pollutants

• Material must be analyzed for possible pollutants during construction work on plots with an entry in the register of polluted sites (KbS) (see Art. 16 VVEA)

• CO₂ calculation according to ÖKOBAUDAT current version 2021-II from 25.06.2021 according to EN15804+A2

• Ordinance on the Prevention and Disposal of Waste VVEA of 4.12.2015 (as at 1.1.2023)

• FOEN

• Bodenwelten.de

• Source graphic: FOEN - Federal Office for the Environment