The assurance work scope included visits to three of our major operating sites, in addition to our corporate headquarters, and covered reviews of the Sustainable Development Principles and position statements; 2) processes in place to identify and prioritize sustainability risks and opportunities; 3) systems and approaches that we are using to manage sustainability risks and opportunities; 4) environmental, social, and economic sustainability performance data in key risk areas; and 5) application level of reporting against the GRI G3 reporting guidelines.