Renovation of Thalwil gasworks

Project overview

The operation of the Thalwil gasworks resulted in polluted soil and tar deposits in Lake Zurich. In a first step, the tar deposits were extracted from the lake using a suction pump protected by a cage, before being conditioned and disposed of ashore. In a second step, the polluted soil was removed via large overlapped drill holes.

Expertise involved

Contaminated sites


Office of Waste, Water, Energy and Air (WWEA) of the canton of Zurich, municipality of Thalwil

Our services

<p class="p1">Senior site management for the clean-up of tar deposits in the lake. Project planning, invitation to tender and site management for the clean-up of the polluted soil.</p>

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