SCOPE OF WORK A variety of drilling techniques were used on the site, to drill boreholes up to 50m deep. These include the use of: • Cable percussive rigs • Hollow stem auger rigs • Window sampling rigs • Sonic rigs Standard soil sampling regimes were followed and in addition to this, piston sampling and continuous undisturbed samples - U100’s - were incorporated into the works. In addition to the drilling crews, we also had a dedicated team on site, to carry out continuous gas and water monitoring, permeability testing and in-situ water quality testing. Health & Safety As a result of historical and current site usage, there was the potential for a wide range of contaminants across the Olympic Park area. We therefore agreed that all sites on this project should be

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