WC-OSH 109 Tagging and Isolation

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1 Doc ID aquadoc # Version Date 07 Sep 2015 Next Review Date 29 Oct 2017 Custodian Mgr Consultancy Field Services Accountabilities Framework Level 1: Manage Occupational Safety and Health Level 2: Manage Hazards and OSH Incidents This document forms part of the Water Corporation s mandatory Safety Essentials. Isolation Never work on an energy source without the correct method of isolation There is a Quick Reference Sheet that summarises key requirements of this procedure attached at Appendix A. 1 Purpose This procedure describes the isolation and tagging process that is used at Water Corporation to protect persons from potential hazards associated with engulfment or uncontrolled energy release. This includes but is not limited to hazardous energy in the forms of kinetic, electrical, thermal, chemical reaction or potential energy. It also describes the use of Out of Service and Information Tags, which can be used for other operational purposes. Content 1 Purpose Scope Roles and Responsibilities Training and Competency On-the job instruction to short-term contractors Flowchart Overview of Simple and Complex Isolation process Isolation Process Safe Job Planning Isolation Classification Simple Isolations Complex Isolations De-energising and isolating energy sources Verifying isolation of energy sources Applying tags or locks Requirements for Isolations Gas and Pneumatic Systems Fluid Systems Planning Carry out planned isolations PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 1 OF 37

2 7.3 Electrical Systems Isolation High Voltage System Isolations Mains Voltage Hard-Wired System Isolations (physical break by component removal) Mains Voltage Hard-Wired System Isolations (without removal of a circuit component) Testing of electrical isolations Complex Isolations Authorised Person Responsible Person Isolations Control Coordinator (ICC) Isolations Planning Meeting Isolation Control Documents Isolation Request Form Isolation Handover Form Isolation Control Form Approved Tags and Applications Personal Danger Tag Isolated Tag Removal of Isolated Tag Out of Service Tag Removal of Out Of Service Tag Information Tag Removal of Tag by Others Active Tag Register Self-Assessment Records Definitions References Compliance Mapping Appendix A Tagging and Isolation Quick Reference Sheet Appendix B Tagging & Isolation Task Specific Instruction Record Short-term Contractors Appendix C Complex Isolation Planning Meeting Sample Agenda Appendix D Isolation Request Form Appendix E Isolation Handover Form Appendix F Isolation Control Form Appendix G Management of Multiple Authorised or Responsible Persons PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 2 OF 37

3 2 Scope This procedure applies to all Water Corporation employees. As per the requirements of the Health Safety and Environment (HSE) Handbook for Contractors, this standard applies to contractors in the case of work: At the Corporation s facilities, or In relation to plant owned and controlled by the Water Corporation. Isolation of high voltage systems for the purpose of working on high voltage components is out of scope of this procedure; refer to WC-OSH 118 High Voltage Switching Practice (ME2). 3 Roles and Responsibilities Role Responsibilities Authorised Person Confirm the work scope to identify necessary isolation points. Evaluate the operational impact on asset infrastructure if the isolations were conducted, and obtain approval from others if needed. Represent the Region/Alliance at the Complex Isolation Planning Meeting. Arrange isolations, and provide an on-site handover to the Responsible Person. Respond to the Isolation Request Form and provide an Isolation Handover Form as a means of work permit. Contract Manager Shall ensure that contractors working under this procedure are appropriately trained or instructed. Line Manager Shall ensure that employees working under this procedure are appropriately trained. Branch / Regional / Alliance Manager Isolations Control Coordinator Complex Isolations Shall ensure that a list of approved Authorised Persons for Complex Isolation is maintained, reviewed and readily available. Complex Isolations Mentoring and coach the Authorised Person and/or the Responsible Person, as appropriate to their level of experience with the role and/or the number of parties involved in the isolation. Identify necessary stop points in the tagging and isolation process, at which to carry out appropriate checks. Convene an isolations planning meeting. Ensure there is a satisfactory succession plan in place, in event of a change in the scope of work, or a change to the appointed Authorised Person or Responsible Person. Responsible Person While work is in progress, ensure each at risk person working on isolated plant is fitting appropriate tags or signing-on and off the Isolation Control Form. Additionally, in the case of Complex Isolations: 4 Training and Competency Liaise with the Authorised Person to have them arrange necessary isolations. When work is completed, ensuring all at risk persons have removed tags or signedoff the Isolation Control Form prior to a hand-back to the Authorised Person. Line Managers (or Contract Managers) shall ensure that employees or contractors working under this procedure have satisfactorily completed the relevant level of training: Course Name Mandatory for Roles Description Period of Validity Tagging and Isolation Level 1 SAP Q5531 Persons who work on isolated plant without performing isolation themselves. Identify the Corporation's Tagging & Isolation Procedure Correctly use or interpret tags 3 years PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 3 OF 37

4 Course Name Mandatory for Roles Description Period of Validity In the case of short-term contractors, refer to Section 4.1 as an alternative to undertaking Level 1 training. Understand the role of others in conducting isolations Understand the application of the Isolation Forms and applications of the Active Tag Register Tagging and Isolation Level 2 SAP Q5532 Persons who would physically perform isolations. Responsible Persons using an Isolation Control Form (for a Simple Isolation). Correctly apply the Corporation's standards for isolation and locking. Conduct tagging and isolation instruction for a short-term contractor. 3 years Tagging and Isolation Level 3 SAP Q5533 Persons who will act as an Authorised Person, Responsible Person, or Isolations Control Co-ordinator in the management of complex isolations. How to manage complex isolations. 3 years OSH Permits SAP Q12326 Water Corporation employees access via LMS Contractors request this training as a DVD from Contract Manager. Persons who will act as an Authorised Person, Responsible Person or Isolations Control Coordinator for Complex Isolations. This online course describes: What activities require an OSH permit; Water Corporation variety of permits Role, responsibility and process of issuing, receiving or working under an OSH permit 3 years 4.1 On-the job instruction to short-term contractors Short-term contractors who will be required to work on isolated plant (which may include affixing tags and/or sign isolation forms, but will not undertake isolation work themselves) may receive on-the-job instruction in the application of this procedure, in lieu of formal training and assessment to Tagging and Isolation Level 1. Depending on the type of isolation, the instruction shall be provided by: Simple isolation the Instructor shall be a person (Water Corporation or Contractor) that holds a qualification in Tagging and Isolation Level 2. Complex isolation the instructor shall be a person (Water Corporation or Contractor) that holds a qualification in Tagging and Isolation Level 3. This option is subject to the following conditions: Access to formal training programs must be impractical. It shall only be available to short term contractors who are working on isolated plant (not to employees carrying out isolations or to any persons fulfilling the role of the Authorised Person, Responsible Person or Isolations Control Coordinator). Instruction shall be customised to match the circumstances of the particular job, and the specific tags, forms or other variables that are applicable. The instruction shall be task-specific and shall have no portability to another task undertaken on that site, or to another site / project). Prior to work commencing, the Instructor is to check the correct use of tags used by the instructed persons (not applicable where persons are only required to sign onto an Isolation Control Form or a Confined Space Entry Permit in lieu of fitting Personal Danger Tags). The instructor shall utilise the Tagging & Isolation Task Specific Instruction Record Short-term Contractors (Appendix B) to document instruction covered. The completed checklist shall be signed by both the instructor and the parties receiving instruction and shall be retained in accordance with Section 12 Records. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 4 OF 37

5 5 Flowchart Overview of Simple and Complex Isolation process Isolation required Complex Isolation? Simple Isolation? Authorised Person& Responsible Person appointed Isolations Control Coordinatorappointed where required. Isolation planning meeting held Isolation Request Form Responsible Person completes Part A & sends to Authorised Person. Yes All personnel working on isolated plant to affix Personal Danger Tags to each isolation point Each person to remove Personal Danger Tags when no longer at risk Conduct isolation Can Personal Danger Tags be affixed to each isolation point by all personnel working on isolated plant? No Isolation Control Form Completed by Responsible Person (site supervisor) and used to manage sign-on / off of personnel Signed-off by Responsible Person once all personnel have signed-off. Authorised Personliaises internally (as required) to confirm isolation requirements. Isolation request accepted? No Isolation Request Form Authorised Person returns form to Responsible Person to advise declined request Process complete Yes Isolation Request Form Authorised Person returns form to Responsible Person to confirm acceptance. Isolation Handover Form Authorised Person arranges isolations & records on isolation handover form. Provides to Responsible Person at on-site handover Isolation Handover Form Responsible Person signs-off at completion of works and hands form back to Authorised Person. Yes All personnel working on isolated plant to affix Personal Danger Tags to each isolation point Each person to remove Personal Danger Tags when no longer at risk Can Personal Danger Tags be affixed to each isolation point by all personnel working on isolated plant? No Isolation Control Form Completed by Responsible Person (site supervisor) and used to manage sign-on / off of personnel Signed-off by Responsible Person once all personnel have signed-off. Process complete PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 5 OF 37

6 6 Isolation Process Plant shall be isolated where work is to be carried out on plant and personnel may be exposed to harm. This includes where guards or protective shields are removed, or plant is dismantled, and restoration of the energy source has the potential to expose personnel carrying out work to harm. 6.1 Safe Job Planning The need to undertake isolation and the identification of associated isolation points shall be determined as part of the Safe Job Planning process for work tasks. For Water Corporation employees, Safe Job Planning shall be in accordance with WC-OSH 007 Safe Job Planning. 6.2 Isolation Classification Each isolation shall be planned and classified as either Simple or Complex, as determined by characteristics of the task. The flowchart in Section 5 and the table in Appendix A provide an overview of the tagging and isolation processes applicable to these two streams Simple Isolations Simple isolation typically involve all of the following: Few isolation points. Not more than two parties. A clear scope of work. Where the work on the isolated plant and the carrying out of isolations will be by the same Water Corporation or Alliance work team: Isolations shall be performed by the operations team with day-to-day control over the plant. In the case of isolation of a geographically distributed system (i.e. where isolation points are remote) and it is not practicable for each person working on isolated plant to affix a Personal Danger Tag to each isolation point, the Responsible Person on site shall manage sign-on/off by each at risk person through an Isolation Control Form in accordance with Section 9.3. Where the work on the isolated plant will be undertaken by contractors (or by a Water Corporation team not having day-to-day control over the plant): Isolations shall be performed by the Water Corporation / Alliance operations team with day-to-day control over the plant. Contractors or other Water Corporation teams not having day-to-control of the plant shall have written authorisation from the operations team prior to carrying out any isolation of the Corporation s plant. Note: A Clearance to Work Permit does not provide the written authority required to operate or isolate the Corporation s plant, unless the Clearance to Work specifically states that this has been authorised. A request to arrange a simple isolation shall be made to the relevant Water Corporation business area in charge of the day-to-day operation of the plant. For a simple isolation, this request shall take the form of a Clearance to Work Permit (refer to WC-OSH 023 Clearance to Work on Water Corporation Assets). The party arranging the isolation shall advise once the isolation is in place through issue of the approved Clearance to Work Permit. Where it is not practicable for each person working on isolated plant to affix a Personal Danger Tag to each isolation point, the Responsible Person shall manage sign-on / off using an Isolation Control Form in accordance with Section 9.3. In the case of isolation of a geographically distributed system (i.e. where isolation points are remote) and it is not practicable for each person working on isolated plant to affix a Personal Danger Tag to each isolation point, this situation shall be managed as a Complex Isolation with associated isolation control documents, including the Isolation Control Form (as per Section 9.3). PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 6 OF 37

7 6.2.2 Complex Isolations Complex Isolations always involve a formal handover and hand-back process. The handover is normally to an external contractor, but the process can also be applied to in-house work of high risk or high complexity. Complex Isolations always involve a formal hand-over and typically involve one or more of the following: Numerous isolation points. An unclear or potentially unclear scope of work. Three or more parties (such as the Water Corporation requesting an alliance contractor to carry out isolations for another contractor). Geographically Distributed Isolations requiring a hand-over (i.e. where the isolation points are remote from the plant to be worked on and there will be a handover between the party performing the isolation and the party who will be working on the isolated plant). The Complex Isolation process involves an appointed Authorised Person(s) and Responsible Person(s) using Isolation Control Documents (Section 9) to manage the isolation and tagging components of the task. In some instances, the Authorised Person and Responsible Person may be overseen by an Isolations Control Coordinator (ICC). Refer to Section 8 for the requirements associated with managing a Complex Isolation. 6.3 De-energising and isolating energy sources Isolations shall be performed on equipment or systems where otherwise there would be a risk of engulfment, or a risk of injury by the uncontrolled release of energy. This includes but is not limited to hazardous energy in the forms of: Kinetic energy in the moving parts of mechanical systems. Electrical energy. Thermal energy. Chemical reaction. Potential energy (i.e. stored energy) from sources such as pneumatic or hydraulic systems, capacitors, or springs or belts under tension. In the case of potential energy: The stored energy shall be dissipated in a controlled manner, and The motor, compressor or other source that created the stored energy shall be isolated (and/or that part of the system to be worked on being separated from the source, for example by removal and tagging of a coupling). De-energisation and isolation of energy sources shall take into account specific requirements for: Gas and pneumatic systems (Section 7.1) Fluid systems (Section 7.2), and Electrical systems (Section 7.3). 6.4 Verifying isolation of energy sources The person performing the isolation shall conduct or arrange for a test to confirm that the isolation is effective. Where an Isolated Tag is fitted, the person conducting the isolation shall record the type of test performed on the tag (using the field Tests carried out ). In the event of a test demonstrating that the isolation has not been effective, a tag shall not be affixed and the work shall not proceed. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 7 OF 37

8 6.5 Applying tags or locks Appropriate tags shall be used in accordance with Section 10 - Approved Tags and Applications. Tags shall be affixed close to each isolation point and where the tag can be clearly seen by a person approaching the point to which it is affixed. If other Work Instructions require additional actions at these points (e.g. Locks to be fitted), they shall be complied with. Where locks are required by this procedure to be fitted to isolation points, it is the responsibility of the person carrying out the isolation to fit the locks. Where endorsed by the party having day-to-day control of the plant, additional locks may be fitted by the Responsible Person or by individuals working on the isolated plant. 7 Requirements for Isolations 7.1 Gas and Pneumatic Systems For gas and pneumatic systems, pressure in the isolated section shall be relieved and maintained before work is commenced and during the period of work. For gas and pneumatic system isolations, the operations person planning the isolation shall undertake the following steps: 1. Confirm the scope of work for which isolations will be required. 2. For the scope of work, determine the level of initial risk that would be posed if isolations were ineffective e.g. exposure to hazardous substances or flammable gas. 3. For the assessed level of risk and with regard to the type, number, location and condition of available isolation points (valves, dead-plates, etc.), determine the proposed standard of isolation in consideration of the following order of preference: Create an air gap or break by disconnection or removal of plant components, or apply a suitably rated flanged dead-plate, or Double valve isolation - either two or more valves (or equivalent) in series with the section between vented, or Single valve isolation. Where gasses present in the isolated section may contain potentially harmful levels of hazardous substances or flammable materials, the isolated section of the system shall be cleaned and purged in accordance with WC-OSH 123 Cleaning and Purging. In the case of deliberate venting of biogas or other flammable gas, follow the requirements of WC-OSH 135 Working in a Flammable Gas Area. 7.2 Fluid Systems Planning For fluid system isolation, the operations person planning the isolation shall undertake the following steps: 1. Confirm the scope of work for which isolations will be required. No change in the work scope (or work elsewhere on the same system which could potentially compromise the isolation) is permitted without a prior review of the adequacy of isolations proposed/ conducted by the Authorised Person or other operations person arranging the isolation. 2. For the scope of work, determine the level of initial risk that would be posed if isolations were ineffective e.g. engulfment, water pressure jet impact, effects of mixing water with electricity, and exposure to hazardous substances. 3. For the assessed level of risk and with regard to the type, number, location and condition of available isolation points (valves, gates, penstocks, etc.), determine the proposed standard of isolation in consideration of the following order of preference and the table below: PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 8 OF 37

9 Create an air gap or break by disconnection or removal of plant components, or apply a suitably rated flanged dead-plate. A purpose made, suitably rated double block and bleed isolation valve, bleed open. Double valve isolation - either two or more valves (or equivalent) in series with the section between fully drained and vented where practicable, or depressurised where draining is impracticable. Purpose engineered and good condition gate. Single valve isolation or penstock. Plugs installed in a sewer system, selected and installed and regularly monitored in accordance with S407 Sewer Isolation Devices Standard. Stop logs. Initial Risk (the risk to personnel if there was no isolation, or isolation was ineffective) High / Extreme Medium Low Typical Example Work involving entry to a live main or confined space - with potential for sudden inflow rapidly consuming the space. e.g. Trunk main or surge vessel entry Type 350 and 180 wastewater pump station wet well entry. Work in a confined space but with potential for only moderate inflow consuming the space, and sufficient time for egress. e.g. Type 90, 40, 10 and 6 wastewater pump station wet well entry, provided upstream levels are controlled and monitored. Work not involving confined space, only moderate risk associated with isolation failure: e.g. Repair of a DN 150 above-ground water main Removal of a pump from a water pump station. General minor reticulation repairs. Minor sewer work where a build-up of pressure/level will be monitored and controlled (e.g. by pumping/ tankering) Method of Isolation In priority order: a, b, c or d In priority order: a, b, c or d (or e, preferable in conjunction with f) e In priority order: a to g. 4. For the assessed level of risk and the nature/location of the proposed work, determine how the isolated section of the system is to be depressurised and/or drained and vented by applying the following order of preference: Fully drain and vent the system between all isolation points (including adjacent sections forming a double isolation ), or Fully drain and vent the section of the system (for which the isolation is required), depressurise and vent adjacent sections forming a double isolation, or Drain only a section of the system between isolation points (the section for which the isolation is required), or Depressurise the system between isolation points. 5. For the planned method of isolation, and planned draining / venting of the system, identify equipment/plant involved in the isolation, including: Section valves and associated air valves and scours. Valve actuators that will need to be isolated from their energy source (electric, pneumatic or hydraulic). PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 9 OF 37

10 Upstream and downstream potential pressure or flow sources that will require isolating (e.g. pumps, chemical injectors, reservoirs, tanks, surge vessels, cross connections and all connected piping systems). 6. Consider the risk of the isolation and the size and complexity of the system being isolated. For all isolations which are part of a significant piping system and considered Medium, High or Extreme risk: Consult engineering drawings, Field Books, Graphical Information Systems (e.g. LiteSpatial), operations and maintenance manuals, and the Drawing Management System to ensure that all isolation points are identified and that all potential pressure/flow sources are appropriately isolated and recorded. Use pipeline profile drawings and for larger piping systems develop a system profile (e.g. MS Excel chart) showing the Relative Levels (RLs) and positioning of components in the scheme. 7. Consider the need for communication, including back-up to mobile phones (e.g. radio), between all parties directly involved or responsible for the isolation throughout the isolation process for geographically distributed fluid system isolations (i.e. where isolation points, air valves and scours are remote). 8. The planned sequence of conducting isolations, air valve checks/removals and opening of scours should be documented and signed by operations person planning the isolation method where either: The assessed level of initial risk for the scope of work is High or Extreme, or More than four points of isolation are proposed, or The work is to be managed as a Complex Isolation 9. The documented Fluid System Isolation Plan should be reviewed and counter-signed by the relevant Team Leader or nominee. This template can be used to document the Fluid System Isolation Plan Carry out planned isolations 10. Lock or cap isolation points where practicable (mandatory in the case of single valve isolation, where the valve is in an unsecured area). 11. Where the uncontrolled release of water / wastewater held by vacuum in the top of a pipe section could represent a risk to personnel (i.e. a release of hung water ), all sections of the pipe above the work area shall be vented to atmospheric pressure. Working from highest air valves to lowest air valves in the part of the system to be drained: Remove the air valve (preferred), and visually confirm the isolation valve (immediately below the air valve) is open, or Visually and audibly confirm that the valve has vented (noting that some valves may function as discharge only ) then crack the air-valve flange and leave the flange wedged open to break the seal. Ensure the isolation valve is open. 12. Drain or depressurise the main in accordance with the decision made at Step 0. Where scours are available, confirm scours are open to atmosphere (not under water). This can be achieved by: Where the scour point is above the surrounding ground level, draining the system until the scour ceases to run, or Where the scour is in a pit, draining and pumping out the pit until the scour ceases to run, or Where the scour point consists of a below ground valve and riser pipe, pumping out the riser (using a self-priming pump) then removing the pump and visually confirming that the riser is empty. If the scour continues to run, either: Re-assess isolations, or Monitor the running of the scour until the flow is at a low and steady rate. Work shall not proceed until it is determined: o The low flows are attributed to an isolation point passing water, and PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 10 OF 37

11 o The on-site supervisor of the work party to work on the isolated plant is notified and is satisfied the low flow rate and volume will not represent a risk to the work crew. If there are no scours available (e.g. on a minor water reticulation system), either: Connect a hydrant, or Open a flushing point, or Hot tap, to prove the main is effectively isolated. 13. Apart from tests in the form of observations of air valves and scours (as per Steps 11 and 12), consider and where necessary apply the following additional tests: Test isolation points (e.g. valves, penstocks, gates, and including those used in double isolation ) under conditions which are more arduous (i.e. involve higher system pressures, higher gravity system fluid levels) than those which will be present during the isolation. This may be achieved by: o o o Check the isolation effectiveness of single or each double isolation valve individually by isolating, scouring and checking scour flows. Higher system pressures should be used (e.g. by pump station operation), where practical, during the verification process than during the isolation. Checking the effectiveness of non-return valves, where these form part of a double isolation, prior to closing the (secondary) isolation valve. Verifying the performance of gates and penstocks with the highest practical gravity sewer level (i.e. close to overflow), then ensuring lower levels are maintained during the isolation (e.g. by bypass pumping). Where there are two adjacent mains of the same or similar size, prior to work on the intended main confirm which is the correct main to be worked on, by suitable means which may include: o Hot tapping the main to be worked on. o Noting the different pipe material or age that distinguishes them. o Walking the length of the pipe between isolation points. o In the case of a repair of a leak, sighting the damaged section of pipe. 14. Where fluids present in the isolated section may contain potentially harmful levels of hazardous substances or flammable materials, the isolated section of the system shall be cleaned and purged in accordance with WC-OSH 123 Cleaning and Purging. 7.3 Electrical Systems Isolation Electrical systems isolations shall only be performed by Electrical Workers, except under the limited scenarios of isolation of: Low Voltage (i.e. Mains Voltage) plug-in systems (e.g. 3-pin plug into a power outlet; decontactor). Low Voltage (i.e. Mains Voltage) hard-wired systems (e.g. through a 240 V switch or circuit breaker), where work on electrical components is not required. Extra low voltage power circuits (i.e. not exceeding 50V a.c. or 120V ripple free d.c.) High Voltage System Isolations Isolation of high voltage systems for the purpose of working on high voltage components is out of scope of this procedure; refer to WC-OSH 118 High Voltage Switching Practice (ME2). Where a High Voltage System is isolated for the purpose of carrying out work on plant or equipment associated with the High Voltage System, but not on the high voltage components of that system, isolation and tagging shall be carried out in accordance with this procedure Mains Voltage Hard-Wired System Isolations (physical break by component removal) Where there is a Low Voltage Non Plug-in System installed, the Competent Person carrying out the isolation shall provide a physical break by removal of a component in the circuit wherever practicable. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 11 OF 37

12 These isolations may take the form of: Scenario Steps to achieve a physical break Fuses are protected by a Controlled Access Cabinet Fuses are not protected by a Controlled Access Cabinet The internal mechanism of the switch being utilised for the purpose of isolation can be isolated through a rack-out mechanism The internal mechanism of the switch being utilised for the purpose of isolation can be isolated through a removal mechanism Fuse link holders shall be removed from the fuse bases, tied together and left inside the cabinet. Electrical testing to confirm that the energy source has been de-energised, using an electrical testing instrument or method suited for the purpose. The appropriate type of tag is attached to the outside of the Controlled Access Cabinet. Fuse links shall be removed from the fuse link holders, grouped/ tied together for easy recognition and left inside the switch-room, enclosure or cabinet. Electrical testing to confirm that the energy source has been de-energised, using an electrical testing instrument or method suited to the purpose. The appropriate type of tag is attached to the empty fuse link holders. Empty fuse link holders replaced in fuse bases. Complete the rack-out to the stop position. Electrical testing to confirm that the energy source has been de-energised, using an electrical testing instrument or method suited to the purpose. Affix the appropriate type of tag to the racked-out mechanism. Where the switch has a key mechanism to complete rack-out or lockout, the key shall be removed and attached to the tag along with any other control switch keys associated with the switch being utilised for the purpose of isolation. Close compartment. An additional tag shall be attached to the outside of the compartment if the tag attached to the racked-out mechanism is not visible to a person approaching the compartment. Ensure that live terminals will not be left exposed by the removal of the mechanism. Complete the removal. Electrical testing to confirm that the energy source has been de-energised, using an electrical testing instrument or method suited to the purpose. Affix the appropriate type of tag at the closest visible point to the switch base. Where the switch has a key mechanism to complete rack-out or lockout, the key shall be removed and attached to the tag along with any other control switch keys associated with the switch being utilised for the purpose of isolation. Close compartment. An additional tag shall be attached to the outside of the compartment if the tag attached to the switch base is not visible to a person approaching the compartment Mains Voltage Hard-Wired System Isolations (without removal of a circuit component) The physical removal of a device which prevents plant from being energised is not always reasonably practicable. Where it is not reasonably practicable to remove a component in order to provide a visible Air Gap, the following shall be carried out: The switch or circuit breaker being utilised for the purpose of isolation shall be switched to the Off position. Electrical testing to confirm that the energy source has been de-energised, using an electrical testing instrument or method suited to the purpose. Affix the appropriate type of tag to the switch or circuit breaker. The type of test conducted shall be recorded on the tag. Where a key mechanism is present, the key shall be removed and attached to the appropriate type of tag. Note: Such devices may be utilised to provide a secondary protection, applied in addition to isolation in the full current circuit. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 12 OF 37

13 This method shall use a reliable full current electrical isolation switch or circuit breaker, which does not rely on any of the following: SCADA Control selector switches (or other switches that are not part of main current path of the electrical circuit) Emergency stops Push button devices Devices controlled by a touch panel, or Switches that use a domestic toggle mechanism (as the inherent design limitations may make these unreliable for full current isolation) Disconnection of electrical wiring can be hazardous and shall only be performed by a Licenced Electrical Worker where determined to provide the best method of isolation. The full current device upstream of the disconnection point shall be in the Off position and tagged before any disconnection of wiring Testing of electrical isolations As far as practicable, the effectiveness of electrical system isolations shall be proven prior to work commencing on the isolated asset. The testing of High Voltage electrical isolations shall be in accordance with WC-OSH 118 High Voltage Switching Practice (ME2). The testing of Low Voltage or Extra Low Voltage electrical systems shall be achieved through one of the following test methods to confirm the isolation, and in the following order of preference: Method 1: Visible break This method requires the power circuit to be isolated through use of a power outlet, de-contactor, fuses or similar item. The test shall be conducted in the following sequence: 1. Trace the power supply cable/conduit from the isolation point to the plant to be worked on (or confirm a match between the labelling of the isolation point and the plant to be worked on) 2. Conduct the isolation by forming a clearly visible break in the power circuit (e.g. disconnecting the power at a power outlet or de-contactor, or withdrawal of fuses from a fuse base in the power circuit). Method 2: Use of a Multimeter or other voltage tester This method shall only be undertaken by Electrical Workers or persons with a Restricted Electrical License. The test shall prove the absence of voltage to the electrical system using a Multimeter or other voltage tester. In conducting the test, all electrical equipment, terminals and conductors shall be treated as live until proven to be isolated and the precautions stated in Section of S487 Safe Work on Low Voltage LV Electrical Equipment and Installations for live testing, commissioning and fault finding shall be observed. The test equipment and test method shall comply with S487 including that the test be conducted in the following sequence: 1. Test the voltage tester on a known voltage source for correct operation. 2. Test between all conductors and a known earth. 3. Test between all conductors. 4. Re-test the voltage tester on a known voltage source for correct operation. Method 3: Attempt to run (bump test) This method involves operating the local control device that would normally cause the plant to run, to confirm the isolated plant cannot run, or is not attempting to run and using a local control device to provide a secondary level of protection. The test shall be conducted in the following sequence: 1. Where there are multiple adjacent similar items of plant (such as a series of pumps), confirm the identity of the plant to be worked on through labelling or bump testing. 2. If the plant is running, turn it off using the local control device/s (e.g. Auto/Off/Manual selector switch). If the plant is not running, bump test the plant to confirm it is capable of running by operating PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 13 OF 37

14 the local control device (e.g. through observation of the ammeter, sound of a contactor opening or closing, noise or vibration in the motor or pump, or change in flows), then turn it off. Note: If during step 2 the plant cannot run [or should not be run for reasons such as a risk of significant damage to the plant], the test at step 4 is only to confirm the isolated plant is not attempting to run. 3. Conduct the power circuit isolation (e.g. circuit breaker or isolation switch in the main current path). 4. Attempt to start the plant using the local control device/s to confirm the plant will not run and is not attempting to run (i.e. the isolation were effective). If the plant did run, or were attempting to run, the isolation shall be deemed ineffective - contact an Electrical Worker for further investigation. 5. Return the local control device to off. In addition to tagging/locking the isolation point during step 3 of this method, tag/lock the control device where practicable. Note: The primary isolation shall be in the main current path. Operation of the local control device that does not achieve full current isolation is a secondary precaution only, and shall not be considered adequate isolation. Refer to Section for further explanation. 8 Complex Isolations 8.1 Authorised Person The role of the Authorised Person is to represent the operations team having day-to-day control over the plant in determining and performing necessary isolations. Branch / Regional / Alliance Managers shall ensure that a list of approved Authorised Persons for Complex Isolation is maintained, reviewed and readily available. Appointed Authorised persons should have the following competencies and attributes: Shall hold qualifications for the training courses: OSH Permit (Online) (#Q12326); Tagging and Isolation Level 3 (#Q5531, Q5532 & Q5533). Should be familiar with the site and plant involved in the works. Should have good communication skills and be thorough, logical and calm. Should be able to commit the time necessary to fulfil their functions as an Authorised Person, which will involve attending site. Should understand circumstances when, with whom, and how to apply other processes to notify or obtain other s approval before proceeding, or escalating to others. Note: The selection of persons to be an Authorised Person should be under standing arrangements, rather than appointed for each Complex Isolation task. 8.2 Responsible Person The responsibilities of the Responsible Person are to: Liaise with the Authorised Person to have them arrange necessary isolations. While work is in progress, ensure each at risk person working on an isolated plant is fitting appropriate tags or signing-on and off the Isolation Control Form. When work is completed, ensuring all at risk persons have removed tags or signed-off the Isolation Control Form prior to a hand-back to the Authorised Person. A Responsible Person shall be appointed for all Complex Isolations tasks. The Responsible Person shall be a Site Supervisor of the workers that will undertake the work on the isolated plant and shall hold a qualification for the training course Tagging and Isolation Level 3 (Q5531, Q5532 & Q5533). Where isolation is to provide access for more than one party to work on plant, and each such party is working independent of each other, each party shall appoint their own Responsible Person. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 14 OF 37

15 8.3 Isolations Control Coordinator (ICC) An Isolations Control Coordinator (ICC) may be appointed to oversee the functions of the Authorised and Responsible Persons. The requirement for an ICC to be appointed shall be assessed in the planning stage for of any works requiring a Complex Isolation. Factors to consider when deciding whether to appoint an ICC include: The level of experience and familiarity of the Authorised and Responsible Person(s) with their role. Whether any delays in the work scheduling would have significant impacts. Whether the isolation is likely to involve multiple operations groups or independent parties (and thus, potentially a requirement for multiple Authorised Persons and Responsible Persons appointed). An ICC should be appointed where there are likely to be multiple Authorised Persons or Responsible Persons. Appendix G provides guidance for the management of common scenarios involving multiple parties. An ICC may also be appointed to oversee isolations for a wider program of works, such as: Work involving isolation within the Integrated Water Supply System, or Update of a major wastewater treatment plant. The role of the ICC shall include: Mentoring and coaching the Authorised Person and/or the Responsible Person, as appropriate to their level of experience with the role and/or the number of parties involved in the isolation. Identifying necessary stop points in the tagging and isolation process, at which to carry out appropriate checks. Convening an isolations planning meeting (refer to Section 8.4). Ensuring there is a satisfactory succession plan in place, in event of a change in the scope of work, or a change to the appointed Authorised Person or Responsible Person. At the discretion of the ICC, this may require a further isolations planning meeting to be conducted. 8.4 Isolations Planning Meeting An Isolations Planning Meeting shall be conducted for all Complex Isolations. The meeting shall be attended by the Authorised Person, Responsible Person (and the Isolations Control Coordinator, where appointed). Unless otherwise agreed, for works under contract the meeting is convened by the Contract Manager. In the case of in-house works (i.e. not under contract), the meeting is convened by the Authorised Person or the appointed Isolations Control Coordinator. This person shall ensure: Attendance by persons with key roles. Relevant matters are discussed and minuted. Refer to Appendix C for a suggested sample agenda. Outcomes are not in conflict with this procedure. All parties are made aware that any communication regarding the complex isolation must be channelled through the Authorised or Responsible Person. The Authorised Person shall ensure that there is contingency planning to cover any changes in the scope of work, or a change in the appointed Authorised Person and Responsible Person or other significant matter. The Plan may involve reconvening the planning meeting and shall involve notifying the Authorised Person. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 15 OF 37

16 9 Isolation Control Documents Isolation Control Documents comprise Isolation Request Forms (Appendix D) Isolation Handover Forms (Appendix E) Isolation Control Forms (Appendix F) The use of these control documents is described in the sections below. Note: A Clearance to Work Permit shall be used in conjunction with the Isolation Control Documents where isolation is performed for an external contractor or other Water Corporation business area not in charge of the day-to-day operation of plant. 9.1 Isolation Request Form An Isolation Request Form (Appendix D) is used in the case of a Complex Isolation (refer Section 8) to describe the scope and timing of the works for which an isolation is being sought. The Responsible Person shall complete Part A of the Isolation Request form and forward it to the Authorised Person. The description of the scope of work shall be adequate for the Authorised Person to identify necessary isolation points. Diagrams shall be attached to clarify where necessary. On receipt of the Isolation Request Form, the Authorised Person shall determine if the request can be approved and actioned. This may involve further internal communications (e.g. submitting a Scheme Operations System Change Request Form). The Authorised Person shall complete Part B of the Isolation Request form to indicate whether the request for isolation has been accepted or declined and return a completed copy to the Responsible Person, as early as possible before the noted Required date and time of Isolation. 9.2 Isolation Handover Form Where a request for isolation is accepted under the Isolation Request Form, an Isolation Handover Form is used by the Authorised Person to record details of the isolations conducted and provides for a formal handover and hand-back with the Responsible Person. An Isolation Handover Form is used to document and facilitate a formal hand-over document to the Responsible Person prior to commencement of work, and hand-back to the Authorised Person once work is complete. The Isolation Handover Form: Identifies the individual items of equipment that have been isolated Records the attachment of Isolated Tags and tag numbers at each Isolation Point Records the acceptance of the isolation by the Responsible Person Provides for a formal hand-back when work is completed and all at risk persons have withdrawn. An on-site handover shall occur between the Authorised Person and Responsible Person, including the handing over of the Isolation Handover form. So far as practicable, the Responsible Person attains assurance of the standard of isolations performed and any locking. The Responsible Person may request further isolation or accept the Isolation by sign-off of Part B of the form. By agreement, any keys to locks shall be held in the possession of the Authorised Person or the Responsible Person. The location of any duplicate keys shall be known by the Authorised Person and the Responsible Person and shall be accessed only in case of an emergency. 9.3 Isolation Control Form While work is in progress, tags shall be affixed at each point of isolation in accordance with Section 6 of this procedure, including the affixing and daily removal of Personal Danger tags by each at risk employee involved in the work task. Where this is not practicable, the Responsible Person shall utilise an Isolation Control Form to: Control access to the plant/equipment subject to Isolation through a sign-in / sign- out process. Record any additional control measures that have been put in place by the Responsible Person (as agreed with the Authorised Person). PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 16 OF 37

17 The Responsible Person shall establish a Control Point for all persons actually working on the plant/equipment subject to the isolation. The Control Point shall be a physical location where written documentation (such as the Isolation Request Form, Safe Job Planning, Isolation Handover form, and Isolation Control form(s)) are kept for the duration of the work to be carried out. All employees associated with the Isolation shall have access to these documents. All personnel involved in the works on the plant/equipment shall accept the safe system of work by signing onto the Isolation Control Form after viewing the Safe Job Planning, Isolation Handover Form and any other attachments. Any person that is requested to work on the equipment may request further isolation before sign-on to the Isolation Control form. Any further Isolation shall be documented on the Isolation Control form and may be carried out by the Responsible Person following approval from the Authorised Person. The equipment shall not be energised or operated under any circumstance while any employee is signed-on to the Isolation Control Form. All personnel working on the plant/equipment shall sign-off from the Isolation Control form at the end of their shift. Where a person has failed to sign-off on the Isolation Control Form and is unavailable, follow the escalation process outlined in Section Note: Where the work to be carried out on the isolated plant is undertaken under a Confined Space Entry (CSE) Permit, the Isolation Control Form can be attached to the CSE Permit and all persons may sign-in and sign-out using the CSE Permit in place of completing this same information on Part B of the Isolation Control Form. Parts A of the Isolation Control Form shall still be completed by the Responsible Person. When all work subject to the isolation has been completed, the Responsible Person shall ensure that: All persons have signed-off the Isolation Control form (or CSE Permit), and Any isolations and associated tags placed by the Responsible Person have been removed, and Formal hand-back to the Authorised Person occurs by the Responsible Person by completing Part C of the Isolation Handover Form and handing this form and any lockout keys back to the Authorised Person. The Authorised Person shall verify that all Isolated tags attached by, and all Isolations actually carried out by or arranged by the Authorised Person have been removed. 10 Approved Tags and Applications Four (4) distinctive types of tags are made available by the Water Corporation to identify the status of plant. Only tags approved by the Water Corporation as part of this procedure shall be used. The approved tags are: Personal Danger Tag Isolated Tag Out of Service Tag Information Tag. The person affixing the tag shall legibly and indelibly complete all fields on the tag. Tags shall be affixed in a manner whereby the tag can be clearly seen by a person approaching the point to which it is affixed. Where the information recorded on any affixed tag is unclear, clarification shall be sought before affixing any additional tag. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 17 OF 37

18 10.1 Personal Danger Tag A Personal Danger Tag shall be used where there is a risk of injury to the person affixing the tag in the event that the isolation point (to which the tag is affixed) is operated or energised. Personal Danger Tag Colour: Red and Black on White Don t touch, or you will be putting me in danger Each at risk person working on plant, including any persons assisting with the work, shall affix their own Personal Danger Tag to the Isolation Point(s). Where it is not practicable for each at risk person to fit / remove Personal Danger Tags, an Isolation Control Form can be used. This form has the same effect as the attachment of a Personal Danger Tag to all isolation points by each person completing the works. The Isolation Control Form shall be held by the Responsible Person for the job and be kept available to all parties at the job-front. Plant shall not be operated or energised (or conversely, de-energised if a Personal Danger Tag has been affixed to keep a piece of equipment in operation) unless all Personal Danger Tags have been removed (or the Responsible Person has signed-off the Isolation Control Form and has indicated that all persons have signed-out). Where work is not completed before the end of the shift, that person shall remove their Personal Danger Tag. If the equipment must not be operated, an Out Of Service Tag shall be affixed. A Personal Danger Tag shall be removed by the person who affixed the tag. Refer to Section 10.5 if that person is unavailable. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 18 OF 37

19 10.2 Isolated Tag An Isolated Tag is used to identify that plant has been isolated on behalf of others and is not to be operated. This includes where equipment must remain on or valves (or similar) be kept in the open position for safety reasons. Isolated Tag Colour: Orange Background Front Back Don t touch, I ve isolated the plant for other people to work on An Isolated Tag is not required where the person carrying out the isolation will be the only at risk person that is working on the plant and has attached their own Personal Danger tag (i.e. the isolation is not on behalf of others). An Isolated Tag is also not required to be fitted where: The job involves a Simple Isolation, and The isolation is performed by a member of the work party, and All members of the work party were present when the isolation test was performed. The person conducting the isolation shall affix an Isolated Tag at each isolation point. The type of test performed to verify that the isolation was effective shall be recorded on the tag (using the field Tests carried out ). Where the plant is isolated for more than one party to work on and the parties will be working independent of each other, a separate Isolated Tag shall be affixed at each Isolation Point. For Complex Isolations, the Isolation Handover Form number shall be recorded on associated Isolated Tags (in the Dangers, defects and limitations section). For work performed under a Clearance to Work (CTW) Permit, the permit number should be referenced in this section. Where an Isolated Tag will remain in place for more than one shift, the person affixing the tag shall register it on an Active Tag Register in accordance with Section An Isolated tag shall not be used in any circumstance as a substitute for a Personal Danger tag. Each person carrying out work on plant to which an Isolated Tag is affixed shall affix their own Personal Danger tag to each isolation point (or sign-on to the Isolation Control Form) prior to commencing work on the plant. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 19 OF 37

20 Removal of Isolated Tag An Isolated tag shall only be removed after the necessary work has been carried out and all other associated tags have been removed. The person(s) nominated (individuals or team) in the This tag may be removed by field on the tag shall be responsible for checking the work has been completed before removing the tag. The authority shall not permit a broader range of persons to remove the tag than is necessary in the circumstances. Where at risk persons will be signing on to an Isolation Control Form (in place of fitting Personal Danger Tags): For Simple Isolations (where the isolation and the work on the isolated plant will be undertaken by the same work team) the Responsible Person as noted on the Isolation Control Form and/or one other named individual shall be the only individuals nominated on the Isolated Tag for its removal. For Complex Isolations the Authorised Person and/or one other named individual shall be the only individuals nominated on the Isolated Tag for its removal. These named individuals shall only remove the tag following return of the Isolation Handover Form to the Authorised Person (as per Section 9.2). Where the tag had been registered on an Active Tag Register, the removal of the tag shall be recorded in the Active Tag Register Out of Service Tag Out of Service Tags shall be used to indicate that plant or equipment shall not be used, operated or energised, in circumstances other than those requiring the use of a Personal Danger Tag or Isolated Tag. For example: Equipment is faulty and would be dangerous to use. Work is suspended and operating the equipment could cause damage or flooding. Out of Service Tag Colour: Yellow background Front Back Don t touch, the equipment is faulty or work is suspended. Each person carrying out work on plant where an Out of Service tag is affixed shall affix their Personal Danger tags to all isolation points (or otherwise sign-on to an Isolation Control Form) before working on any plant where the operation or energising of the plant would place them at risk. Note: An Out of Service tag affixed to plant denotes the plant is not to be operated or energised but does not necessarily mean the plant has been isolated. PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 20 OF 37

21 Plant or equipment shall not be operated or energised when it is fitted with an Out of Service tag (other than for fault finding or testing by the competent person authorised to carry out repairs). Where an Out of Service Tag has been affixed to Water Corporation infrastructure and will remain in place for more than one shift, the person affixing the tag shall register it on an Active Tag Register in accordance with Section Removal of Out Of Service Tag The person nominated in the This tag may be removed by field on the tag shall be responsible for checking the required work has been completed before removing the tag. The authority shall not permit a broader range of persons to remove the tag than is necessary in the circumstances. Where the tag had been registered on the Active Tag Register, the removal of the tag shall be recorded in the Active Tag Register Information Tag The Information Tag is used to provide information of a nature where it is not the intent of the tag to prevent operation of plant or equipment. Information Tag Colour: Blue on White background Front Back I m not saying don t touch, I m saying something else Information tags convey a message of a temporary nature, and typically should not be in place longer than one month. Depending on the nature of the information to be conveyed, tags may be applied to the plant itself or its point of isolation or control. Details of Information Tags are not required to be recorded on an Active Tag Register Removal of Tag by Others A Personal Danger Tag shall be removed by the person who affixed the tag. Other types of tags may be removed by the individuals authorised on the tag (within the field this tag may be removed by...). Should these persons be unavailable to remove the tag, leave plant isolated until the person authorised for its removal can return to site. Where this is not practicable, a Designated Person shall be responsible to: Obtain the agreement of the person who affixed the tag that the tag can be removed. In the event that the person who affixed the tag cannot be contacted, the Designated Person may direct that the tag be removed following inspection of the plant and associated system. The inspection shall determine the reason for affixing the tag has been addressed and all required tasks are completed such that the plant can be operated safely. For works undertaken by Water Corporation employees, the Designated Person is a Section Leader who directly reports to the Branch Manager or Regional Manager responsible for the plant to which a tag is attached (e.g. Service Delivery Manager). The functions of the Designated Person shall not be delegated to another person (but may be escalated to the Branch Manager or Regional Branch Manager). For works undertaken by Contractors, the Designated Person is the 'Contractor Representative' for the contract under which the work is undertaken (or delegate). PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 21 OF 37

22 10.6 Active Tag Register Where Isolated or Out of Service tags affixed by Water Corporation or alliance personnel will be active for more than one shift, the tag details shall be logged on an Active Tag Register. This can involve using the Operations Centre Active Tag Register service, or equivalent. Note: There is only a requirement to register Out of Service tags that have been affixed to Water Corporation infrastructure (e.g. not required in the case of faulty office equipment, tools). The person who affixed the tag shall arrange for tag details to be logged on the Active Tag Register. The person who removes the tag shall arrange for the status of the tag to be updated on the register. Each Active Tag Register shall have a custodian who initiates a two-monthly review of logged active tags, such that tags are removed when no longer needed. 11 Self-Assessment A Tagging and Isolation Self Assessment form is available to help business areas evaluate their current compliance with key requirements of this procedure. Completed forms shall be retained in accordance with Section Records Contractor records associated with tagging and isolation shall be available for the duration of the task and then stored in an easily retrievable manner. Water Corporation records shall be available for the duration of the task and then filed in accordance with the Water Corporation Records Retention and Disposal Schedule, with the filing convention, retention period and disposition type outlined below: Record To be retained by Filing convention Retained for (time period) Authorised Persons List Branch Manager / Alliance Manager INFORMATION MANAGEMENT Control Authorised Persons List Interim 2 years after last action Active Tag Register Operations Centre n/a n/a n/a Clearance to Work (CTW) Permits Including associated attachments to the permit (e.g. contractor s Description of Works). Fluid System Isolation Plan Isolation Control Documents Isolation Control Form Isolation Request Form Isolation Handover Form WC-OSH 109 Tagging and Isolation - Self Assessment form Training and competency records Tagging & Isolation On the Job Instruction Checklist Branch Manager / Alliance Manager Section Manager of the relevant Authorised Person / Work Area Section manager of the relevant Authorised Person / work area Section manager of the relevant Authorised Person / work area Section manager of the relevant work area INFORMATION MANAGEMENT Control Registers and Registration OSH - Risk Management - Work Permits OSH - Planning Fluid System Isolation OSH - Risk Management - Work Permits OSH - Compliance Self Assessment [Region - District] Interim 2 years after last action Interim 2 years after last action Interim 2 years after last action Interim 2 years after last action Interim 2 years after last action SAP n/a n/a n/a Branch Manager STAFF DEVELOPMENT - Training Interim 2 years after last action Contract Manager Relevant Contract Management file for the works. Disposition Type Destroy 7 years after last action Destroy 7 years after last action Destroy 7 years after last action Destroy 10 years after last action Destroy 7 years after last action Destroy 10 years after last action Destroy 7 years after last action PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 22 OF 37

23 13 Definitions Term Active Tag Register Air Gap Authorised Person Barrier Break Capping Competent Person Contractor Control Point Controlled Access Cabinet Employees Energised Extra Low Voltage (ELV) Geographically Distributed Isolations Description This register is used to record the details of Isolated or Out of Service tags that are active for more than one shift of the person affixing the tag. A deliberate physical break in a circuit or system that has been created by the disconnection or removal of plant components or equipment. Examples are removal of electrical wiring, fuses, de-contactors, plugs and sockets, piping or valves or the operation of a rated electrical isolating switch, but not the operation of a valve. A person who is competent to identify potential hazards, risks and control measures for the work to be performed. The Authorised Person is the person in charge of the day-to-day operation of a Water Corporation asset, or their delegate. The Authorised Person can be an employee of an Alliance Contractor, if the Alliance Contractor has day-to-day control of the asset. An item of equipment installed such that it forms a complete physical obstruction to the flow of energy within a circuit or system. The same as Air Gap. A temporary installation of a cap over the spindle of a valve. The capping device does not have provision for positive locking to prevent a change of state and relies on respecting the associated tag. A person who has, through a combination of training, education and experience, acquired knowledge and skills enabling that person to perform a specified task correctly. An individual, company or organisation engaged under a contract with the Water Corporation to perform work or supply goods or services in connection with the Water Corporation. A physical location designated by the Responsible Person where Isolation Control Documentation is kept for the duration of the work being carried out. Examples are: Isolation Hand-over Form, Isolation Control Form, Confined Space Entry Permit and all associated attachments. A cabinet or cubicle that has access restricted by means of a locking device. Access to keys for the locking device shall be restricted to personnel authorised by the Water Corporation. For the purposes of this document, employees shall be defined as all employees including Contract of Service employees, Contract for Service personnel, and the personnel of the Corporation s Alliance Contractors in performing the services required under their respective alliance contracts. The presence, or restoration, of energy to the plant, equipment or apparatus. Types of energy include, but are not restricted to, electrical, potential, kinetic, thermal and chemical Not exceeding 50 volt AC or 120 Volt ripple free DC (refer AS 3000). A grouping of isolation points that are remote from the plant to be worked on. Examples: Pipeline section five kilometres in length with multiple valves located within or outside metropolitan areas. High Voltage (HV) Above 1000 volt AC or 1500 volt DC (refer AS 3000). Information Tag Isolated Isolated Tag Isolations Control Coordinator Isolation Control Form Isolation Hand-over Form Isolation Point Isolation Request An approved Water Corporation tag that is used to provide information of an operations nature, where it is not the intent of the tag to prevent operation of plant. The state of plant, or in the case of electrical or pressure services, where all potential hazards and energy sources have been disconnected, de-energised, released, isolated and checked to control inadvertent operation, ensuring that work can be carried out in a safe manner. Rendered incapable of being operated without premeditated and deliberate manual operation. An approved Water Corporation tag that is used to identify that plant has been isolated on behalf of others and is not to be operated A competent person appointed (where necessary) to mentor, coach, and oversee the functions of the Authorised Person(s) and Responsible Person(s) in Complex Isolations. Form used to control access to the isolated plant by way of a sign-in/ sign-out process, as an alternative to each at risk person fitting and removing individual Personal Danger Tags where this is impractical. The Authorised Person utilises this form in Complex Isolations to: Communicate all details of the isolation to the Responsible Person. Record hand-over/ hand-back between the Authorised Person and the Responsible Person. A position where there is an interruption in the circuit or system which intentionally prevents the uncontrolled release of energy Form is used in Complex Isolations to record a proposed isolation, between the party requesting isolation and PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 23 OF 37

24 Term Form Lockout Low Voltage (LV) Out Of Service Tag Personal Danger Tag Plant Responsible Person Shall and Should Shift Switch Switch; Control Selector Tested Voltage Description the party requested to carry out the isolation. The utilisation of a locking device for the purpose of Isolating that positively prevents a change in state of the device. Exceeding extra low voltage, but not exceeding 1000 volt AC or 1500 volt DC. An approved Water Corporation tag that is used to indicate that the plant shall not be operated or energised, in circumstances other than those requiring the use of a Personal Danger Tag or Isolated Tag. An approved Water Corporation tag that is used where there is a risk of injury to the person affixing the tag in the event that the isolation point (to which the tag is affixed) is operated or energised. Plant includes all machinery, equipment and systems, components of such systems or any other asset requiring isolation, e.g. mechanical, electrical, pneumatic or hydraulic operated pumps, valves, motors, actuators, switch gear or pipe systems. Supervisor of workers undertaking the work. Authorised, qualified, trained and competent person for the on-site aspects of the work to be undertaken. The Responsible Person shall identify and control hazards/risks arising from the work itself. The word shall is to be understood as mandatory and the word should as recommended but non-mandatory. A single continuous work period encompassing normal working hours and any approved additional overtime work hours forming a continuous work period. Also known as a circuit isolation switch, a device that provides full current electrical isolation and includes circuit breakers, isolators, and disconnectors. Is a switch capable of selecting the mode or required status of the control wiring in an electrical circuit. It is NOT part of main current path of the electrical circuit, and therefore does NOT provide full current electrical isolation. The completion of a test process by a competent person, to prove or disprove the presence of the energy source/ hazard, using an instrument or method suited to the purpose. A difference of potential normally existing between conductors and between conductors and earth as defined in AS/NZS Extra-low voltage not exceeding 50 V AC or 120 V ripple free DC. Low voltage exceeding extra low voltage, but not exceeding 1000 V Ac. or 1500 V DC. High voltage exceeding low voltage. 14 References Document Number S407 WC-OSH 007 WC-OSH 023 WC-OSH 118 WC-OSH 123 WC-OSH 135 S487 Title Health Safety and Environment (HSE) Handbook for Contractors Sewer Isolation Devices Standard Safe Job Planning Clearance to Work on Water Corporation Assets High Voltage Switching Practice (ME2) Cleaning and Purging Working in a Flammable Gas Area Safe Work on Low Voltage LV Electrical Equipment and Installations PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 24 OF 37

25 15 Compliance Mapping Task Legislation Tagging and Isolation Occupational Safety and Health Act 1984 Environmental Protection Act 1986 Electricity Act 1945 Occupational Safety and Health Regulations 1996 Electrical (Licensing) Regulations 1991 Electricity Regulations 1947 Code of Practice: Safeguarding of Machinery and plant Code of Practice: Safe Low Voltage Work Practices by Electricians AS 1319 Signs for the Occupational Environment AS/NZS 3000 Wiring Rules AS 3012 Electrical Installations Construction and demolition sites AS 3017 Electrical Installations Verification Guidelines AS Safety of machinery Document Revision History 29 Oct 2014 Full review and re-structure of procedure to clarify requirements. There are now two isolation classifications: Simple and Complex. There are changed requirements for fluid and gas system isolations. Refer to MOC # Jan 2015 Included reference to Safety Essentials. Refer to MOC # Provided examples of classes of hazardous energy types that may give rise to an uncontrolled release of energy. Added requirements for stored energy. Refer to MOC # Sep 2015 Instructions for the testing of electrical systems included. Requirements for non-electrical workers to have a work instruction for testing of electrical isolations deleted. Refer to MOC# PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 25 OF 37

26 Appendix A Tagging and Isolation Quick Reference Sheet Job Stage Simple Isolation Complex Isolation NB: This process is adjusted if there are multiple Authorised Persons or Responsible Persons Prior to work commencing on plant Work on plant is in progress Work on plant is completed Personnel are trained in this procedure Isolations are carried out to standards of this procedure (with locking if required) Isolated Tags are fitted (if required) Where practicable, each at risk person that will work on isolated plant affixes their own Personal Danger Tag at each isolation point or Where this is not practicable, personnel sign onto an Isolation Control Form held by the Responsible Person (Site Supervisor) Personal Danger tags are removed and replaced with an Out of Service tag (i.e. end of day or shift), or personnel sign off the Isolation Control Form where the form is utilised. Personnel Danger tags are reinstated prior to work recommencing, or personnel sign onto the Isolation Control Form. If Out of Service or Isolated tags are in place overnight or longer, they are logged on an Active Tag Register. Personnel remove their own Personal Danger tags (or sign off the Isolation Control Form if the Form was utilised, and the form is cancelled) Isolated tags and locks are removed (if fitted) The removal of Isolated tags and/or Out of Service tags is recorded on the Active Tag Register (if relevant) Forms and attachments that were utilised are retained as a record Personnel are trained in this procedure Preparations are made: Authorised Persons appointed Responsible Persons appointed Isolations Control Coordinator appointed (if required) Isolation planning meeting held Isolations Request Form submitted by, and returned to the Responsible Person Isolations are carried out to standards of this procedure (and locking if required) An Isolated Tag is affixed at each isolation point, and the tag references an associated Isolation Handover Form number An on-site handover from the Authorised Person to the Responsible Person occurs, and the Isolation Handover Form is provided Where practicable, each at risk person that will work on isolated plant affixes their own Personal Danger Tag at each isolation point or Where this is not practicable, personnel sign onto an Isolation Control Form held by the Responsible Person Personal Danger tags are removed and replaced with an Out of Service tag (i.e. end of day or shift), or personnel sign off the Isolation Control Form where the form is utilised. Personnel Danger tags are reinstated prior to work recommencing, or personnel sign onto the Isolation Control Form. If Out of Service or Isolated tags are in place overnight or longer, they are logged on an Active Tag Register. Personnel remove their own Personal Danger tags (or sign off the Isolation Control Form if the Form was utilised, and the form is cancelled) A hand-back from the Responsible Person to the Authorised Person occurs, including the return of the Isolation Handover Form The Authorised Person arranges removal of Isolated tags, and locks The removal of the Isolated tags and/or Out of Service tags is recorded on the Active Tag Register (if relevant) Forms and attachments that were utilised are retained as a record # Version date: 29 Oct 2014 PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 26 OF 37

27 1. Persons carrying out isolation to be trained to Level 2, competent and authorised. Other than Operations & Maintenance Alliance Contractors in day-to-day control of plant, contractors are to have written authorisation to isolate Water Corporation plant. 2. Electrical System isolations are restricted to Licensed Electrical Workers other than for: Extra low voltage power circuits Mains voltage plug-in systems Mains voltage hard-wired systems, where work on electrical components is not required and where the isolation and test method is detailed in a work instruction or equivalent Tagging and Isolation Quick Reference Sheet Isolation / Locking PERSONAL DANGER TAG Attach a Personal Danger Tag at each isolation point if there is risk of injury to you the person actually working on the equipment. Each at risk person is to affix their own Personal Danger Tags to the designated Isolation Point(s). Equipment affixed with a Personal Danger tag must not be operated. A Personal Danger Tag is to be removed by the person who affixed it (refer to Tagging and Isolation procedure if this person is unavailable). Approved Tags and Applications 3. For fluid systems apply the following hierarchy as far as practicable: a) Create an air gap or break by disconnection or removal of plant components, or apply a suitably rated flanged dead-plate. b) A purpose made, suitably rated double block and bleed isolation valve, bleed open. c) Double valve isolation - either two or more valves (or equivalent) in series with the section between fully drained and vented where practicable, or depressurised where draining is impracticable. d) Purpose engineered and good condition gate. e) Single valve isolation or penstock. f) Plugs installed in a sewer system, selected and installed and regularly monitored in accordance with S407 Sewer Isolation Devices Standard. g) Stop logs ISOLATED TAG An Isolated Tag indicates that plant has been isolated on behalf of others. An Isolated Tag is not a substitute for a Personal Danger Tag Plant affixed with an Isolated Tag must not be operated. If the tag remains in place for longer than one shift, the details on the tag must be placed on an Active Tag Register. Only the person(s) (individuals or team) nominated in the This tag may be removed by field may remove it. OUT OF SERVICE TAG An Out of Service Tag is placed on plant or equipment which is not to be used or operated due to: A fault For operational reasons Plant or equipment affixed with an Out of Service Tag must not be operated (other than for fault finding or testing by the competent person authorised to carry out repairs). If the tag remains in place for longer than one shift and has been affixed to Water Corporation infrastructure, the details on the tag must be placed on the Active Tag Register. Only the person(s) (individuals or team) nominated in the This tag may be removed by field may remove it. INFORMATION TAG This tag does not prevent plant or equipment operation. The tag provides temporary miscellaneous information (normally of an operations nature, but may be a precaution). PRINT DATE: 17/09/15 WARNING: DOCUMENT UNCONTROLLED WHEN PRINTED PAGE 27 OF 37

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