After a few weeks of intense field work at site Färgaren and site Hagfors with the purpose of getting a proper baseline data set before the PCE remediation works start at both sites, some large geophysical data sets and a large number of water samples has been collected. Most of the data is considered to be of good quality and the processing computers are running around the clock at the moment. The laboratory is also busy with all the chemical analyses.
Last week most of the MIRACHL team gathered at the Geological department at Lund University for an afternoon workshop, where the first preliminary results were presented – DC resistivity and IP results from site Färgaren and EM, GPR, DCIPresults and also results from the water chemistry sampling from site Hagfors. The results were presented by the MSc students Anna, Hedda and Robin and the PhD student Aris. Although it is nothing scientifically new, at site Färgaren we could clearly differentiate the newly excavated and refilled top most part of the volume, which also showed the new instrument and protocol gives a better resolution than the previous versions. To see the remaining contaminants below the excavated and refilled area a lot more analysis job has to be carried out comparing with the data collected in exactly the same positions in the TRUST Project, time lapse analysis.
From the site Hagfors data we all agreed on that it I s a very complicated site to understand. It seems to be a large variation of the natural geology and also a lot of manmade fillings, quickly changing in short distances. It will be a big challenge to understand both the underground setting and the spreading of the contaminant. Since there is a remediation pilot test planned after summer the interpretation work is running on full speed.
After a final introduction and presentation of the new MIRACHL guest researcher Tina Martin we all met on the roof terrace for some local beer in a proper Danish hygge way.