Preliminary determination of pollutants plume in groundwater at hazardous solid waste disposal site by employing CPT and rig

This study was conducted to delineate a plume occurred in hazardous waste d isposal site in Brisbane, Australia. At first, levels of conductivity obser ved during Cone Penetrometer Test (CPT) leggings were initially indicative that possible contaminants are depth-variably presented with showing the hi ghest at approximately 200 mS cm(-1) in 9 m deep from some of locations. Su bsequently, CPT rig and HydroPunch were used to collect depth-discrete grou ndwater samples in the area where CPT leggings had been undertaken. However , it was not capable of sampling the representative groundwater samples due to the cone refusal where the residual clay is layered at nominal depth th rough the aquifer. Alternatively, a number of temporary wells were installe d after each of locations was penetrated using a modified steel cone functi oned by Cm rig. The samples taken from those of wells were characterized by gas chromatography mass spectrometer (GCMS) and as chromatography filame i onization detector (GCFID), which revealed that sulfolane and thiolane were mainly presented. Subsequent analyses performed for the samples taken from permanent nest piezometers consistently demonstrated that possible plume b oundary would be correspondingly presented in the study area where contamin ants were found as low as detection limit or levels of not-detectable.