This metric is asking for the total amount of hazardous waste generated by the company in metric tonnes:

For WikiRate researchers:

Companies who align reports to GRI’s Sustainability Reporting Standards often include a GRI Content Index or Annex where GRI disclosures, with GRI codes, are listed.

• Use the GRI Index, CTRL F, Command F or search button on source preview to search for this index and metrics within the report

• Use G4 codes, G3 codes or keywords to quickly find values, keeping in mind that some companies report on the metric using different terms, e.g. G4-EN23 or EN23, hazardous waste

• Always check the metric question and methodology for the unit of measure or currency - researchers may need to carry out calculations or conversions before entering the final metric value

• Add comments documenting exactly where within the source you found the information (page number) and include details of simple or complex calculations or conversions made to determine the metric value

• If you are unable to locate a metric value in a source you can search for additional sources where the data is available and add a new source

Further guidance on how to research values for GRI-based metrics is available here, including detailed guidance on adding, editing and Checking metric values.

Global Reporting Initiative compliance guidance for companies:

To calculate total weight of hazardous waste created by the organization’s operations - G4-EN23-a:

• Identify the weight of waste created by the organization’s operations, categorized as hazardous waste (as defined by national legislation at the point of generation)

If no weight data are available, estimate the weight using available information on waste density and volume collected, mass balances, or similar information.