ISO 5667-22:2010
[Current]
Water quality — Sampling — Part 22: Guidance on the design and installation of groundwater monitoring points
...667-22:2010(E)
ISO 2010 All rights reserved 9
materials (a minimum annulus of 38 mm is recommended), also it might be necessary to start the
borehole at a large diameter to achieve a suitable final diameter at depth;
c) impact on groundwater qu...