In-Situ Europe is fortunate to retain its connection with Peter Dumble, founder of Waterra UK Ltd., who now provides training and consultancy capability for us.
Peter is leading a series of sampling and level measurement courses throughout 2015 (including a Water Level Measurement training session in May!) during which delegates get to learn the latest in groundwater sampling and level measurement methodologies, as well as seeing a wide range of groundwater measurement and sampling instrumentation in action.
As if to prove his understanding of the intricacies of groundwater sampling Peter has, in conjunction with his co-authors from the University of Birmingham, written a detailed article for International Environmental Technology (IET). Entitled "Groundwater Quality Sampling at Contaminated Sites: The Long and The Short Of It." the article explores the requirement to obtain "representative" groundwater samples even when monitoring wells are relatively long screened (i.e. greater than 3 metres).
Long screened wells provide many challenges to the ability of hydrogeologists to determine what is a representative sample in the first place and then collect it. Issues such as geological differences through screen lengths and the influence of vertical flow are only two of the factors.
The article provides some food for thought regarding the choice of sampling methodologies. The answer to the question of whether to use fixed volume purging, low flow or zero purge sampling techniques is use what it is correct for the particular environment.
Read the article in full at Environmental Technology or check out In-Situ Europe's guides to groundwater sampling methodologies.
For more information on how In-Situ Europe can support your sampling and measurement requirements call +44 (0) 121 733 7743 or email europe.sales@in-situ.com.
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