• Installation of multilevel groundwater and ground gas monitoring wells • Subsequent rounds of low-flow groundwater sampling and monitoring W orking closely with the demolition contactor , Harrison Group installed in excess of 50nr . cable percussive boreholes to depths of up to 35mbgl, the majority having single or nested monitoring wells installed to allow for comprehensive monitoring of ground gas and groundwater . Almost every geological unit that can be found in the London area was encountered at the site, the near surface geology of which has been complicated by deep areas of made ground associated with relic dock features and naturally by river channels cutting through the solid geology . Prior to breaking ground, service location was undertaken and UXO clearance u

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