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

EP-SMP-01: Maintaining the 3 m3 rainwater tank volume associated with each beach shack

1. ObjectiveslTargets                                                                                    To maintain the continued operation of the 3 m3 rainwater tank volume (two
                                                                                                         1.5m3 Rainwater Tanks) attached to each beach shack for the recycling of
                                                                                                         rainwater

2. Management                                                                                            1) Efficient and cost effective capture of rainwater.
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Strategies
                                                                                                         2)Water quality suitable for laundry, toilet use, and irrigation use.
3. Tasks/Actions                                                                                         Routine checks on structural integrity

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                                                                                                         1)Check roof and guttering for leaves and detritus;
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                                                                                                         2) Check the guttering and down-pipe for cracks, rust, or leaks;
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                                                                                                         3) Check the first flush diverter for leaves and detritus;
                                                                                                         4)Check that the mesh on the rainwater tank is intact and free of detritus;
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                                                                                                         5)Check the rainwater tank for cracks, rust or leaks. Check inside the tank
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                                                                               ,                         for accumulated sediment and nuisance biota.
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  I                                                  ~ .,                                                Routine checks on water quality
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                                                                                                         6)Water quality tests once a month for each beach shack.
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4.Pe                              ormance                                                                1) Costs of maintaining the rainwater capture system are kept to a
Indicators                                                                                               minimum;
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            f          .    ~                                                                            2)Water quality parameters should conform to the ANZECC 2000
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                                                                                                         guidelines’for primary contact.
5. Monitoring                                                                                            1)Structural Integrity: visible cracks, rust, leaks, blockages;
                                                                                                         2)Water Quality parameters: microbial, n isance organisms, pH, toxic
                                                                                                         chemicals, surface films need to conform to the parameters described
                                                                                                         below:

                                                                                                         Microbial Guideline values: The median bacterial content should not
            !                                                                                            exceed 150 faecal coliform organisms/1 00 mL or 35 enterococci
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                                                                                                         organisms/100 mL. Pathogenic free-living protozoans should be absent.
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                                                                                                         Nuisance organisms: Phytoplankton scums, filamentous algal mats, fungus,
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                                                                                                         leeches_should not be present. Di[e_ct contact activities should be
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                                                                                                         discouraged if algal levels of 15 000-20 000 cells/mL are present,
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                                                                                                         depending on the algal species. Large numbers of midges and aquatic
  ~                                                                                                      worms should also be avoided.
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                     ~                                                                                   The pH of the water should be within the range 5.0-9.0.
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                                                                                                         Toxic chemicals Waters containing chemicals that are either toxic or
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                                                                                                         irritating to the skin or mucous membranes are unsuitable. Toxic
                                                                                                         substances should not exceed values in tables 5.2.3 and 5.2.4 in the
                                                                                                         ANZECC 2000 guidelines.

                                                                                                         Surface films Oil and petrochemicals should not be noticeable as a visible
                                                                                                         film on the water nor should they be detectable by odour.

6. Frequency/Deadlines                                                                                   Structural Integrity: once a year.

                                                                                                         Water Quality: once a month.

7. Responsibilities                                                                                      Site Manager

8. Reporting and                                                                                         Annual record of the rainwater system and water quality performance, and
Review                                                                                                   exception reporting of failure and replacement, supplied to senior
                                                                                                         management for review.