Bauer Resources and Bauer Umwelt have announced that it has started work on excavation of a former landfill in Germany following completion of a secant pile cut off wall and test excavations at the end of last year.
The Kesslergrube landfill in Grenzach was used by Roche Pharma and Bauer has been working on the decommissioning and remediation of the site since mid-2015 and is not expected to complete the work until 2020.
The excavation will be carried out in phases and extend to depths of between 8m and 14m below ground level. The excavation area has been covered to prevent contamination escaping from the remediation area and material will be transported to soil treatment plants in the Netherlands or Germany. The excavations will be backfilled with clean aggregate or construction waste.
The landfill was placed in former gravel pits between the 1950s and 1970s and includes pharmaceutical waste from Roche, as well as household and building waste. Plans to remediate the site have been under development since 1991.