concrete delivery, the foundations were left to dry for about 30 hours. Tonight, the team from Pohjois-Suomen Perustuspalvelu returned to check the progress. There was water standing in places on top of the concrete, i.e. the temperature at the surface was just above freezing. Fortunately last night's temperature was rather high for this time of the year, only about -8°C, as shown in the graph of the real-time thermometer of the Sodankylä Geophysical Observatory.
Today, all the moulds were collected, since the foundations are basically hardened already. When the question arose of how to collect them from the far side of the building, one of the team said "Better use oil pressure than blood pressure!" – Of course he was referring to using the hydraulic pumps of the crane instead of carrying all heavy elements to the lorry.