EMISSIONS ASSURANCE STATEMENT
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Work performed In order to form our conclusions we undertook the following limited assurance procedures: • Gained an understanding of the GHG emission reporting process supporting the business activities, through conducting interviews and collation of evidence to understand the basis of measurement, processes and controls supporting the preparation of the GHG inventory. • Conducted a site visit at the Kapuni Gas Treatment Plant to identify sources of GHG emissions. • Assessed whether methodologies for GHG emissions have been correctly applied as per the criteria. • Performed analytical review procedures to support the reasonableness of the data including year on year comparisons of GHG emissions and operational data across the reporting period. • Tested certain calculations performed by Vector, including the monthly energy mass balance. • Identified and tested assumptions supporting the calculations, performed by Vector. • Tested, on a sample basis, to underlying source information to ensure completeness and accuracy of the GHG inventory. • Tested the effectiveness of the controls performed including a sample of validation records for key measurement devices used to estimate GHG emissions. • Checked the appropriateness of the presentation of the information in the Annual Report. Independence, competence and experience Ernst & Young applies Professional and Ethical Standard 3 Quality Control for Firms that Perform Audits and Reviews of Financial Statements and Other Assurance Engagements (Amended) and we have complied with the independence and other ethical requirements of Professional and Ethical Standard 1 Code of Ethics for Assurance Practitioners (Revised) . We have the required competencies and experience to conduct this assurance engagement Ernst & Young’s other relationships with Vector We provide consultancy services in respect of the physical risks from climate change to Vector and Vector is a participant in the EY Cambridge Sustainability Leadership development Programme. We have no other relationships with, or interests in Vector. Limited assurance conclusion Based on the evidence obtained from the procedures we have performed, as described in this report, nothing has come to our attention that causes us to believe that Vector’s GHG inventory for the year ended 30 June 2017 has not been reported, in all material respects, in accordance with the criteria. Restrictions on use of our Report We disclaim any assumption of responsibility for any reliance on this assurance statement or on Vector’s greenhouse gas emissions inventory to which it relates, to any person other than Directors of Vector, or for any purpose other than that for which it was prepared. Any other party seeking to use this report does so at their own risk and we disclaim all responsibility to any other party for any loss or liability that the other party may suffer or incur arising from, or relating to or if any way connected with the contents of our report, the provision of our report to the other party or the reliance on our report by the other party.
Ernst & Young Limited
Graeme Bennett EY Assurance Partner
Auckland 23 August 2017
A member firm of Ernst & Young Global Limited
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Vector://AR 17
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