Response to Information Request - Received on 19/04/2012 · OPW11/0335

EP-SMP-04: Irrigating the ornamental gardens                                                                      "




1. ObjectivesfTargets                                                            To deliver harvested rainwater collected in the 100m3 underground storage
                                                                                 tanks to the ornamental gardens.

2. Management Strategy                                                           Install an irrigation control system utilising programmable logic capable of
                                                                                 reliably delivering harvested rainwater onto the grounds.
3. Tasks/Actions                                                                 1) Ensure that the irrigation control system logic program delivers 2 to 5
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                                                                                 mm/day onto the gardens;
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                                      ~.    ....p;.~, 1          1...            2)Advertise that water used for irrigation is harvested and not from the
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                                                                                 mains supply (i.e. "Rain Water In Use").
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4. Performance                                                         ~
                                                                                 Routine delivery of harvested rainwater onto the gardens.
Indicators                                                            ~




5. Monitoring
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                                                                                 100m3 tanks do not overflow.
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                                                                                 Refer to EP-SMP-03 for structural integrity of the irrigation pipework.

6. Frequency/Deadlines                                                           Weekly.
7. Responsibilities                                                              Site manager;

                                                                                 Landscape gardener.
8. Reporting and                                                                 Exception reporting of failure and replacement to senior management for
Review                                                                 ,
                                                                                 review.
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9. Contingency                                                                   When loss of control 9f the irrigation system occurs:

                                                                       ..~ ~     1) Inform site manager, and request maintenance support;
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                                                                                 2) Cease irrigation supply. If overflowing water cannot be stopped, redirect
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                                           ~\ol                                  overflow onto stable ground (grass surfa e, swale);
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                                                                                 3) Redirect surface water flow to bypass bare or easily eroded surfaces,
              -           _’                                                     and direct overflow onto stable ground (grass surface, swale);
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                                                                                 4) Implement corrective actions.
10. Corrective actions                                                           Repair and/or reprogram the Programmable Logic Controller;
                                                                                 Refer to -EP-SMP-03 for repairs to the structure of the pipework.


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