Contract notice Architectural Construction Engineering and Inspection ServicesASG 93 238 engineering services 2021 23 24Description Between the years 1963 and 1986 various owners traded hides and furs of all kinds on the site of the former Pelzveredelung Fuldatal GmbH in Grebenstrasse in Fuldatal Tetrachlorethylene PER was the predominant solvent used to clean animal skins When tetrachloroethene was redistilled residues were fed into the company s own sewage treatment plant via the sewer system The resulting sewage sludge was applied to drying beds next to the sewage treatment plant Per got into the ground through improper handling of solvents during cleaning work in the company and through leaks in the sewer system Soil and groundwater examinations showed very high loads with trucks Heavy metal contamination was also found in the drying beds Since the start of the renovation around 8 t of HKW have been removed from the unsaturated soil zone through the soil air remediation In total around 33 8 kg of LHKW have been recovered from the groundwater since the start of the renovation through the groundwater remediation carried out since the end of 2002 To monitor the fissured aquifer 8 hour pumping tests are carried out annually every 2 3 years since 2018 at up to seven groundwater measuring points with depths between 20 m and 82 m The review of the cleft aquifer carried out in 2019 showed LHKW concentrations of up to 381 g l LHKW HIM GmbH area remediation of contaminated sites HIM ASG intends to re award the necessary engineering and expert services freelance services for further project processing in the Fuldatal fur finishing project The services can be roughly summarized as follows familiarization with the project Expert support for the pump and treat remediation and soil air extraction Implementation of groundwater and soil air monitoring Carrying out groundwater pumping tests ISCO injections in the Hasenstock hot spot Review of alternatives to pump and treat as a long term perspective from basic research to approval planning Technical support for the client Planning and support for the construction and dismantling of groundwater measuring points Preparation and participation in the award of third party services Evaluation and expert assessment of the test results Adoption and updating of a numerical groundwater flow and pollutant transport model Quality assurance and public relations documentation Selected applicants will be able to find details in the job description at a later date The services are to be awarded for the next 3 years with an optional extension for a further year Time limit for receipt of tenders or requests to participate Date 22 09 2020 Local time 10 00 Disclaimer The above text is machine translated For accurate information kindly refer the original document
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