RFI - Attachment H - Stormwater Management Plan_Issue C_

    Photo 23 Check seals are pushed against the pit walls           Photo 24 Check joining rivets (two piece unit shown above)




3.4 Unit inspection                                             3.5	Filter bag inspection
After the EnviroPod filter bag has been removed, emptied
                                                                     and rejuvenation
and cleaned, the following should be checked to ensure that
the unit has not been damaged:                                  After the filter bags have been emptied and cleaned, they
                                                                should be inspected to evaluate their condition. Given the
•    All connections and joints should be checked and broken    nature of stormwater, the filter bag may become considerably
     rivets replaced (See Photo 23)                             clogged with fine sediment or damaged by various objects
•    The plastic pit seals should be inspected for unit         in stormwater as well as fauna. Sharp material such as sticks,
     movement or damage (See Photo 24)                          combined with high velocity water and a large mass in the
•    The cage should be inspected for damage or movement.       filter bag, can cause small tears in the filter material. Animals
                                                                such as rats have also been known to chew through fine mesh
The overflow diversion channels, and the area between the
                                                                filter bags located in gully pits near takeaway food outlets.
EnviroPod cage and pit wall should also be inspected for any
accumulated debris. Any observed debris should be removed
and disposed of off-site. Accumulated material within the       3.5.1 Clogged filters
outlet pipe may also need to be flushed.
                                                                Clogged filter bags can be cleaned using several different
If spare parts are required, Stormwater360 is able to provide   methods. If the techniques described in the general
these at a cost to the owner of the EnviroPod unit, although    maintenance sections above do not adequately clean the filter
these parts may also be obtained from other suppliers.          bags, the following options should be considered:

                                                                •    Using a stiff brush and a bucket of soapy water, scrub the
                                                                     filter bag surface.
          Please note: If the units are not cleaned
                                                                •    Remove filter bags from the pit and wash the bags using a
           regularly, the mobilisation of material collected
                                                                     high pressure water spray, taking care not to transfer the
           in the EnviroPod unit may occur. As such,
                                                                     contamination elsewhere. Wastewater from the process
           cleaning of the units in accordance with this
                                                                     should be collected and disposed of correctly.
           management plan is required. As this plan is
           based on observations and data collected             •    Remove the filter bags from the pits and the support rings
           during the monitoring period, ongoing                     and wash the bags in an industrial washing machine.
           adjustment of the cleaning frequency is              This final option typically results in the bags appearing
           generally required to improve the overall            like new, with no visible stain or pore clogging within the
           efficiency in the removal of collected material      filter mesh.
           and prevent material overflow.




14    Stormwater360 Operations and maintenance