ASSURANCE APPROACH The assurance evaluation, conducted between January and March of: [ Review of the sustainability-related strategies, policies, objectives, management systems and measurement and reporting procedures used by Hydro-Québec [ Interviews with managers in order to understand how Hydro-Québec deals with the key challenges of sustainability and how the concept of sustainability is implemented in the company [ Interviews with over 50 staff members to learn, among other things, what measures are implemented to facilitate dialogue with stakeholders and to understand the processes for collecting and presenting information about sustainability performance [ Review of the Report for any anomalies with regard to aspects that were verified [ Verification of over 500 data items selected from the Report by Hydro-Québec and examination of data processing proced ures and supporting evidence [ Examination of the company’s performance information to confirm that it concords with targeted indicators drawn from the standard disclosures in the GRI G4 guidelines.