News Archive
Van Walt Guidelines for sampling for PFAS in Groundwater
November 13, 2024We need to make clear, that at the time of writing, there are no ISO or EN standards which deal with the sampling of groundwater for PFAS.
Read MoreSpot measurement v. continuous environmental monitoring
August 25, 2023Environmental monitoring has developed considerably over the years. From the time when a consultant went out monthly or quarterly with a dip tape to monitor the groundwater level in a borehole, wind forward...
Read MoreMeasuring Nitrates (NO3, NO3-N) in the field
June 20, 2023The interest in Nitrates is nothing new. One way or another we have been measuring them for half a century.
Read MoreSave time, save money, save effort, get better results – use low-flow sampling…
June 1, 2023A client recently contacted me to ask if we can repair their high flow purge pump and or sell then a new one. They were using it for (among other applications) to purge a 70m deep bore 3 times for a...
Read MoreEnvironmental monitoring – things can and probably will go wrong!
May 30, 2023The chains are on, 4WD is locked in and we are well past the point of no-return. The season has not started yet but there’s enough snow already to add to the complexity of maintaining a service. We’re...
Read MoreVan Walt focuses on Flumes
January 23, 2023For anyone involved in Water Management you will know about flumes. A flume is used to quantify flow in open channels such as streams, field ditches and irrigation channels. Flumes are man made flow control...
Read MoreDeploying sensors in artesian wells
June 15, 2022The United Kingdom just celebrated the Queen’s Platinum Jubilee. It was a long weekend of pageantry, pomp and circumstance and it was a lot of fun and never lost the focus on the achievement of this...
Read MoreTraining Day in South Africa
April 20, 2022Van Walt has been offering training on a range of environmental sampling subjects for over 30 years. In that time hundreds of delegates have been through our courses from Window Sampling, Groundwater Sampling...
Read MoreVan Walt’s Window Sampling System in action
July 22, 2021From the Sundarbans, the Congo and Kurdistan, to a Roman fortification at the Eastern end of Hadrian’s Wall in Northeast England, you can find our Window Sampling Systems. This is where our latest training...
Read MoreSoil Moisture Probes test Concrete
April 16, 2021Van Walt has partnered IMKO for decades. IMKO, based near Karlsruhe in Germany was owned by the Koehler family. Kurt Koehler was always rather more interested in extracting every last milli-percentage...
Read MoreVan Walt Supporting Capacity Building in Africa
November 9, 2020I am coming to the “end of the beginning” of a project to build capacity in freshwater management in Africa. The inspiration for the project came in 2014 during my first job in nature conservation...
Read MoreFreshwater ecosystems of Madagascar: in extreme need of restoration
August 27, 2020Starting out on my internship with the Tropical Biology Association (TBA), supported by Van Walt, I knew very little about Madagascar. However, right from the beginning of my research it was apparent that...
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