From July to September 2018,  the freelance consultant expert in environmental microbiology Sonia Tarnawski, made assays for eOde to assess the potential of biodegradation of chlorinated compounds in a contaminated site, at the in situ remediation pilot scaling stage. Various substrates were tested on groundwater and solid matrix samples from the  chloroethene-contaminated site, to compare their efficiency as electron donors in the reductive dechloration process. Sonia performed the assays at the laboratory for environmental biotechnology at EPFL and interpreted the results based on her 15 years research work on the subject. It allowed her to provide pratical recommendations for choosing the substrates to be used for an enhanced natural attenuation.