FGD unit shall remove SOx from 5000-14000 mg/Nm3 to less than 427 mg/Nm3 in stack output gas. Contractor shall guarantee that SOx in treated flue gas will not exceed 427 mg/Nm3. If the plant cannot meet the guarantee value then contractor shall pay to Employer 2 % of contract total price for each 30 mg/Nm3 extra SOx in treated gas as liquidated Damages. (Please refer to annex 9). It shall be noted that maximum acceptable level of SOx in treated flue gas is 572 mg/Nm3. therefore exceeding SOx from 572 mg/Nm3 cannot be acceptable and is rejected.