16-001014-02A (Ultimate SCMMP)

undertaken to remove cyanobacteria. An extract is provided in Appendix A. The potential rectification methods are
summarised below:

   If cyanobacterial blooms are a result of plant failure or lack of vegetation, replanting of the WQCP should be
    immediately undertaken. The presence of dense vegetation will help remove algal growth due to shading and is less
    likely to be smothered.
   If cyanobacterial blooms are a result of high nutrient concentrations, immediate actions would involve removal of
    sediments, using a 1 or 2 week “dry out period” for the WQCP to destroy existing algae. Another solution would be to
    pump out the WQCP over the Bioretention Basin or embankment over a period to treat and remove algae. Long term
    actions involve catchment management solutions (i.e. identifying the source of nutrients flowing in to the WQCP and
    applying corrective measures).
   Immediate management responses involve providing signage around the WQCP warning of the potential health risks,
    restricting access, and use chemical actions to eliminate toxins (specialist advice should be sought prior to
    undertaking chemical actions)

Refer to “Water by Design – Rectifying Stormwater Assets” for further details of appropriate corrective actions.




16-001014-02A | SMCMP | PALM LAKE RESORTS                        COOROY RETIREMENT COMMUNITY, TRADING POST
                                                                                             ROAD, COOROY            | 10