Hunter Water Corporation Operational Audit 2010/11 - IPART - NSW ...

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2 Overview of audit findings and recommendations Table 2.1 Summary of compliance with the water quality section Clause Summary of requirement 2007/08 2008/09 2009/10 2010/11 3 Water Quality 3.1 Drinking water quality – planning 3.2 Drinking water quality – standards High- Full Full Full Full Full Full Full High – Full 3.3 Water quality – monitoring High-Full High-Full High-Full Full 3.4 Water quality – reporting Full Full Full Full 3.5 Water – incident management plan 3.6 Waste water and recycling operations High- Full Full High- Full Full Full Full Full High – Full 3.7 Other grades of water High- Full Full Full High – Full 3.8 Environmental water quality - - - Full Note: (Full = Full Compliance; High = High Compliance; Mod = Moderate Compliance; Low = Low Compliance; NC = Non Compliance; Insuff = Insufficient information; - = No requirement/not audited, NA= non-auditable clause). Drinking water quality – standards (clause 3.2) The auditor awarded high to full compliance for the obligations audited under this clause of the licence. The high compliance (sub-clause 3.2.1) was awarded due to the following findings: Issues raised by the auditor regarding the need to introduce automated rapid response processes in water treatment plants. It is the auditor’s opinion that the absences of these processes may result in a delayed or inadequate response in the event of a filter failure. Issues relating to the integrity of water storages were raised by the auditor following a site visit that noted areas of the reservoir roof inspected had insufficient protection around corrugations and holes in the roof, which the auditor considered may allow ingress of rain water or possibly access to birds. A water main rehabilitation process was observed by the auditor. The auditor expressed concern regarding the reliance on the judgement and experience of individual personnel rather than referring to established target criteria to aid the process of renewals. 10 IPART Hunter Water Corporation Operational Audit 2010/11
2 Overview of audit findings and recommendations In relation to these matters the auditor has recommended that Hunter Water: 1 Implement automated rapid response processes for all plants to prevent water being supplied to consumers if not treated to within critical limit specifications as recommended in the ADWG 2011. (Recommendation 1; clause 3.2.1) 2 Review and address, where necessary, the criteria used to define adequate integrity of storage tanks and reservoirs to ensure that there is no entry of vermin and no unacceptable water ingress into these tanks. Validate inspection regimes and amend maintenance procedures to inspect and maintain tanks in the future (Recommendation 2; clause 3.2.1) Develop more robust practices for rehabilitation and renewals of water mains by: – Undertaking a benchmarking exercise involving discussions with other water agencies to develop explicit preventative measures and target criteria for the preventative measures that remove debris and ingress from depressurised water mains during rehabilitation or replacement processes (clause 3.2.1) – Amend work procedures to meet the resulting criteria and implement the preventative measures (clause 3.2.1) We support the auditor’s recommendations, with minor amendments to the third recommendation: 3 Develop more robust practices for rehabilitation and renewals of water mains to prevent/ reduce the potential for debris and ingress from depressurised water mains during rehabilitation or replacement processes. Hunter Water should consult with other utilities (including Sydney Water) to compare Hunter Water’s current practices with the rehabilitation and renewals of water mains practices of other utilities. Hunter Water should amend work procedures in this area and train staff to reflex the new preventative measures that should be adopted (Recommendation 3; clause 3.2.1) Wastewater and recycling operations (clause 3.6) Four sub-clauses were audited under this section of the operating licence. The auditor awarded high to full compliance for the audited obligations. Sub-clause 3.6.3 requires the wastewater and recycling operations plan to provide for monitoring, reporting and incident management procedures. The auditor awarded a high compliance to this clause because “at this stage, incident triggers and procedures are not fully developed for recycled water schemes.” The auditor made a recommendation regarding the development of timeframes for completing this work, which we support (see recommendation 4 below). Hunter Water Corporation Operational Audit 2010/11 IPART 11
Page 1: Independent Pricing and Regulatory
Page 4 and 5: © Independent Pricing and Regulato
Page 7 and 8: Executive Summary Executive Summary
Page 9 and 10: Executive Summary We support the ke
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Page 13 and 14: 1 Introduction Hunter Water is curr
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Page 23 and 24: 3 Historical performance 3 Historic
Page 25: 3 Historical performance R3(a) R3(b
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Page 30 and 31: A Auditors Audit report 24 IPART Hu
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B Hunter Water’s statement of com
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l Schedule A: Licence obligaiions f
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1 1 *' @.. a 9.2.15 - * see schedul
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( f enkironmental costs of each opt
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B Hunter Water’s statement of com
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C Summary of opportunities for impr
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