Sasol Sustainability Report 2018

04 DATA AND ASSURANCE Every effort has been taken to ensure the accuracy of the reported data. We recognise that some data may be subject to uncertainty relating, for example, to different interpretations of the internal reporting guidelines and possible human error in recording and submitting data. The continuous improvement of data quality and accuracy is receiving ongoing attention. Our Global Data Management System (SAP Sustainability Performance Management - SuPM) for key SHE non-financial performance indicators aims at ensuring the appropriate governance of our data collection process and assists in the assurance of the data collected. It also provides for the appropriate approval of data at source level. In addition, we consistently retrain our employees on Group procedures and key performance indicator definitions. The SHE Vice Presidents and Executive SHE committee have regular discussions on the reporting process effectiveness and assurance of data quality issues. We have formalised and follow an internal review process of Group-wide SHE and sustainable development (SHE&SD) data and have initiated a Technical Working Group to address issues and queries that may arise around this. Selected SHE&SD data reporting processes have been integrated into the scope of second party audits; Sasol Assurance Services (SAS) has completed audits on non- financial, non-SHE sustainability data. Nexia SAB&T, together with PricewaterhouseCoopers Inc. (PwC) have completed our annual external SHE&SD data assurance. SAS also provides an overall assessment of the adequacy and effectiveness of the combined assurance landscape related to data integrity. In parallel, the Risk and SHE Audit team continues to review and recommend implementation of controls and testing of this reporting process. Risk assurance The Sasol SHE risk based assurance sub-function within the Group Risk and SHE Function oversees the process for provision of combined assurance for our SHE risks which includes the external certification process for our operations. External certification includes the International Organisation for Standardisation (ISO) 14001 and Occupational Health and Safety Assessment Series (OHSAS) 18001 certification and third party Responsible Care ® verification audits. SHE regulatory compliance audits are also conducted to assist in compliance management and assurance in addition to the Group Compliance programme. Most of our German Operations are Eco Management and Audit Scheme (EMAS) as well as Energy management systems (ISO 50001) validated. Our North American Operations are Responsible Care ® (RCMS) or ISO 14001 (RC14001) certified. Reporting Assurance Our Sustainability Report follows the GRI’s Sustainability Report Standards, including the GRI’s Mining & Metals and Oil & Gas sector supplements. We apply the reporting criteria of the UNGC and this report meets the 21 advanced criteria. We provide a detailed GRI table and a UNGC Communication on Progress at www.sasol.com . For more information refer to our UNGC CDP on www.sasol.com (in the downloads tab). Data, risk and reporting assurance 36 Performance data 37 Independent assurance report to the directors of Sasol Limited 42 Sasol Sustainability Report 2018 36