Historical explorations

A municipality intends to remove built structures. In this context, plots of land are to be cleared. The land was classified by the district's lower soil protection authority as a suspected contaminated site pursuant to § 2 para. 6 of the Federal Soil Protection Act (BBodSchG) and included in the district's soil and contaminated site register. The suspicion of harmful soil changes or other hazards for the individual or the general public arose from the known contaminated use of a self-supply filling station. Therefore, a historical investigation (HE) had to be carried out for the old site before demolition measures were carried out.

The aim of the HE is to obtain information and findings about the past and present use of the site that are as complete as possible and to document them in a reliable manner. All partial areas and uses of the site suspected of contamination are to be identified and recorded. The result of the HE is to serve as a basis for the development of an investigation concept for an orienting investigation (OU) of this contaminated site.

Mull & Partner Ingenieurgesellschaft was commissioned to carry out the historical investigation for the above-mentioned site.

Two underground tanks (5 m³ VK and 10 m³ DK) and a petrol pump belonged to the own-use filling station operated in connection with the use by a beverage wholesaler (1959 - 2014). It is not documented whether these tanks were decommissioned and/or removed. This area was recorded as a suspected contamination area (KVF) in the context of the HE.

A further need for action was proposed in the form of an orienting investigation with the following concept. In order to check whether the containers are still present, approx. 6 search shafts should first be carried out in the area of the former petrol station: