Make sure your geotechnical consultant knows what to look for
This photo is from a recent geotechnical site investigation for a proposed commercial development south of Perth.
Every test location in your site investigation costs money. However there is plenty of information in this photo about ground conditions before we dig a test pit. Bulrushes in the foreground indicate likely shallow ground water and potential for soft/organic deposits typical of wetland areas. Castor oil bushes in background indicate disturbed ground/fill (possibly from infilling around perimeter of the wetland).
Make sure your geotechnical consultant knows what to look for, so you don’t spend money investigating more than you need.