Donald Rumsfeld's "known knowns, known unknowns and unknown unknowns" phrase has become quite a favourite in presentations by geotechnical engineers...

The risk presented by high rates of hazardous ground gas emissions into structures is well documented and means of monitoring and assessing this risk are set out in both BS 8576:2013 and CIRIA C665...

We have always had a policy of enabling flexible and remote working throughout GEA, so the transition to all of our staff working at home has been straightforward.

GEA Technical Director, Mike Plimmer, has provided a thought-provoking piece in this month's AGS magazine on the effects of different methods of sample preparation on results of contamination testing. The article revisits the way a soil sample is prepared prior to analysis and how this varies between laboratories.