Organisational defaults of the waste disposal contractor reporting organisation shall: 2.3.1 identify hazardous waste as defi ned by national legislation at the point of generation; 2.3.2 exclude non-hazardous wastewater from the calculation of non-hazardous waste; 2.3.3 if no weight data are available, estimate the weight using available information on waste density and volume collected, mass balances, or similar information.