From the blog "An Orkney Build (in ICF)"

Work continues on site with our foul and surface water drainage now installed;      Following an initially negative assessment of the treatment plant design by the digger driver, its installation worked out far better than he or I expected, causing him to take back everything negative he had said.  A hole was dug out to the required depth and the conical shaped treatment plant lowered in.  Naturally it pivoted about on the point of the 'cone', but all it required was four le