Water Journal : Water Journal August 2011
water AUGUST 2011 63 governance proportionate degree, be they drinking water, recycled water, wastewater or stormwater. Sydney Water's framework for managing risk in recycled water schemes accounts for the dynamic nature of risk discussed above. By way of analogy, Sydney Water's approach can be described in the following manner: • The outcome or objective is the protection of public health and the environment in the provision of recycled water. • The road map is the 2006 AGWR and other relevant guidelines and memoranda of understanding specified by Sydney Water's regulators. • The vehicle that Sydney Water uses to achieve its objectives is its ISO-certified systems integrating ISO31000:2009, as described in its suite of Recycled Water Quality Management Plans and risk management procedures. Figure 3 illustrates the strategic and functional planning approach encapsulated in the recycled water- quality management plans and customer agreements using specific examples. The Five-Year Plan is a strategic plan which: • Sets the strategic direction by which Sydney Water will manage recycled water quality for all of its schemes; • Addresses water quality issues that affect all recycled water schemes or have a longer-term horizon. These often relate to business systems or are of an investigative or R&D nature. The Five-Year Plan focuses on Sydney Water having and implementing policies and procedures to manage risk. The Quality Management Plan -- Recycled Water Systems (QMP-RWS) documents the common processes and procedures that Sydney Water applies across all of its recycling schemes. From one perspective the QMP-RWS is a manual of Sydney Water's processes and procedures for managing risk in recycled water systems. The scheme-specific recycled water quality management plans and customer agreements address scheme-specific matters. These are the functional planning level for managing recycled water quality risks at individual schemes. Figure 3 shows examples of the four types of schemes in Sydney Water's portfolio. The Western Replacement Flows project is an environmental flow replacement project regulated by the Office of Environment and Heritage (formerly the Department of the Environment, Climate Change and Water) and NSW Health. One example of how these plans integrate is Critical Control Points (CCPs). The Five-Year Plan specifies that Sydney Water's systems will align with the 12-element framework of the 2006 AGWR, which includes Section 2.3.2 under Preventive Measures. The QMP- RWS documents Sydney Water's processes for design, operation and maintenance of control points and the use of critical and operational control points. A scheme-specific plan such as Wollongong Stage 1, for example, documents the CCPs for this scheme, operational limits and monitoring. Scheme-specific plans also document what Sydney Water has termed Operational Control Points (OCPs). These represent significant process operations or other procedures that can impact downstream processes, Critical Control Points or recycled water quality. OCPs strongly relate to operational effectiveness and efficiency and typically have an indirect impact on final recycled water product quality. Poor control or sub- optimal performance at an Operational Control Point may result in greater operational difficulty at downstream Critical Control Point(s). An example of an OCP would be maintenance of chlorine residual in the distribution system. In a treatment process such as the Wollongong Water Recycling Plant, an OCP for the Stage 1 Scheme would be the deep bed filter effluent turbidity, which can reduce the efficiency of subsequent membrane microfiltration and reverse Physical Process Risk Process Documentation Overarching Planning for Schemes and Assets Initial RA 1) Risk Assessment (RA) and Risk Register 2) Implementation Plan Detailed Planning for Schemes and Assets Source to Use on Preferred Option Draft the RWQMP Design, Deliver, Commission for Schemes and Assets Development Risk Management Plan (actions) and implement in asset creation. Audit and review progress of actions. Review and update (with progress): 1) Risk Assesment and Register 2) Implementation Plan Review and update (with progress): 1) Risk Assesment and Register 2) Implementation Plan Asset Creation Operations and Maintenance Catchment Source WWTP/RWP RW Networks End use For Sydney Water: ongoing/business as usual risk management activities including performance review over immediate, short- and long-term time frames. Implementation of RWQMP action plans. Strategic and fuctional RWQMPs RA and Register Records and reports for business purposes, regulators and external stakeholders. Designated RW Supply Zone. - Following guidance from Sydney Water Discretionary Schemes - Implementation of RWMS Designated RW Supply Zone - SW comms and information Discretionary Schemes - SW comms and information - Customer RWMS and records Customer boundary Handover point Figure 4. Flow of risk from scheme inception to ongoing operations and maintenance.
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