A hazardous waste incinerator is to burn 200 Kg/h of PCB waste that is 30 % PCB and 70 % organic solvents. During testing phase, the concentration of PCB in the emission was recorded as 0.025 g/ m³; and the stack flow rate is 50 m³/min. PCB in the ash was measured as 0.005 g/m³. What is the removal efficiency of the incinerator (%)?