LRQA Group Limited, its affiliates and subsidiaries, including LRQA (Thailand) Limited, and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'LRQA'. LRQA assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant LRQA entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract. The English version of this Assurance Statement is the only valid version. LRQA Group Limited assumes no responsibility for versions translated into other languages. This Assurance Statement is only valid when published with the Assertion to which it refers. It may only be reproduced in its entirety. Copyright © LRQA Group Limited, 2022. • Reviewing GC’s process for identifying and determining material issues to confirm that the right issues were included in their Report and updated overtime. We did this by benchmarking reports written by GC and its peers to ensure that sector specific issues were included for comparability. We also tested the filters used in determining material issues to evaluate whether GC makes informed business decisions that may create opportunities which contribute towards sustainable development. • Auditing GC’s data management systems to confirm that there were no significant errors, omissions or mis-statements in the data. We did this by reviewing the effectiveness of data handling procedures, instructions and systems, including those for internal verification. We also spoke with those key people responsible for compiling the data and drafting the report. • Confirming the reliability of the selected specific standards’ data by sampling evidence at Office & Innovation business unit of GC1, Olefin business and Utility units of GC2, Aromatic business unit of GC5, Refinery business unit of GC6, and Subsidiary operations (GGC, GCL, HMC, GCME and Envicco) in Chonburi and Rayong. Note: 1 LRQA did not verify the data back to its original sources, nor did it assess the accuracy and completeness of the data reported by individual locations. 2. Data was reviewed remotely due to Covid-19 restrictions. Observations Further observations and findings, made during the assurance engagement, are: • Inclusivity: We are not aware of any key stakeholder groups that have been excluded from GC’s engagement process. • Materiality: We are not aware of any material issues that have been excluded from GC’s report. GC has processes for identifying and determining material issues. The evaluation process considers factors such as stakeholder concerns, business risks and legal compliance. • Responsiveness: GC and its subsidiaries have processes for responding to various stakeholder groups. We believe that GC should further address the decisions made to their related impact. • Reliability Data management systems are established and centralized for collecting and calculating the data and information associated with the selected specific standard disclosures. LRQA’s standards, competence and independence LRQA ensures the selection of appropriately qualified individuals based on their qualifications, training and experience. The outcome of all verification and certification assessments is then internally reviewed by senior management to ensure that the approach applied is rigorous and transparent. This verification, together with the ISO 14064-1 assurance engagement is the only work undertaken by LRQA for GC and as such does not compromise our independence or impartiality. Dated: 15 February 2022 Opart Charuratana LRQA Lead Verifier On behalf of LRQA Group Limited LRQA (Thailand) Limited 22nd Floor, Sirinrat Building, 3388/78 Rama IV Road Klongton, Klongtoey, Bangkok 10110 THAILAND LRQA reference: BGK00000689 273 INTEGRATED SUSTAINABILITY REPORT 2021 รายงานความยั่งยืนแบบบูรณาการ ประจำ �ปี 2564
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