Spent Activated Carbon Disposal Services
All elution processes are not ideal i.e. 100% efficient, which means there will residual gold on the fine spent carbon, so there is no need to verify that. However, you can assay the spent carbon for the amount of residual gold left on the spent carbon. As for the disposal method, the fire destruction method is the best way to use since you will be able to recover the residual gold on the spent carbon.