For a construction project in the municipality of Stäfa, an installation site was set up on a neighboring public property for around two years. For topographical reasons, some of the existing soil had to be removed and temporarily stored. In order to ensure that the work was carried out in a soil-friendly manner, the building permit required soil monitoring and a soil protection concept.
A soil specialist from Ecosens AG carried out pedological investigations on the affected area to determine the initial condition and took soil samples. The results of the investigations and the physical soil protection measures for soil removal, interim storage of the topsoil and subsoil and subsequent recultivation were documented in a soil protection concept. During the construction work, the BBB monitored and documented the correct execution. By calling in a soil expert, the client ensures that the work is carried out in accordance with the regulations and relieves the landowner of any liability.
Procurement and evaluation of soil data and implementation of pedological surveys of natural, site-typical soil properties.
Carrying out manual soundings and taking soil samples, chemical analyses to check for any existing pollutants (preservation of evidence).
Evaluation and definition of measures for physical soil protection during construction work, for the creation and maintenance of soil depots and subsequent recultivation by means of a recultivation concept.
Preparation of a soil protection concept with documentation of local soil properties and soil protection measures for construction and restoration.
Challenges
Very high urgency and tight deadline for the necessary investigations and reporting until construction approval.
The soil removal and execution took place in November during a challenging time of year in terms of soil moisture and weather conditions for ground work.
The area in question was mapped as an ecologically valuable rough pasture and was to be used as little as possible and as sparingly as possible.
Adjacent to the temporarily utilized ground area, there was an extensive occurrence of annual fireweed (Erigeron annuus), an invasive neophyte.
Our solutions
Careful and expert survey of soil properties and assessment of susceptibility to compaction as a basis for determining suitable soil protection measures.
Involvement and coordination with the responsible specialists from the authorities, direct contact with the site management, the contractor and good instruction of the machine operator carrying out the work.
Expert documentation of the investigations carried out and soil properties as a basis for subsequent recultivation and restoration (recultivation objective) as well as for the preservation of evidence and to relieve the client.
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