16-001014-02A (Ultimate SCMMP)

                                                                                                                       Condition Maintenance
 What to look for                                        Performance Indicator (PI)^                                                                                                Additional Work Needed
                                                                                                                       Rating*   undertaken**
                                                         If above indicators for cyanobacterial blooms
                                                         reveals non‐performance, water quality testing
                                                         is required. Performance indicator is
                                                         ≤500cells/mL of Microcystis aeruginosa or
                                                         biovolume equivalent ≤0.04mm3/mL combined
                                                         total of cyanobacteria.
 OUTLET (RISER OVERFLOW WEIR, PIPE OR OUTFALL)
                                                         Outlet is structurally sound and there Is no
 Erosion
                                                         evidence of erosion or subsidence/settlement

 Damaged or removed structures                           No damage that poses a risk to public safety or
 (e.g. pit lids or grates)                               structural integrity

 Sediment, litter or debris                              No blockage

                                                         No downstream impediments to the release of
                                                         water, no erosion or damage to the outfall
 Downstream Outfall
                                                         structure and no evidence of malfunction (e.g.
                                                         excessive sediment accumulated)




*1 – PI met; 2 – PI met after maintenance activity; 3 – Additional maintenance needed; 4 – Rectification may be needed; NI – not inspected; NA – not applicable
**Quantify where possible e.g. amount of sediment or litter removed
1
 Monitor the rate of accumulation by checking sediment levels at least once per year. This may involve establishing one or more reference points within different zones of the WQCP. Where sediment depths are greater than
150mm, a bathymetric survey of the WQCP may be required to determine the full extent of accumulation
2
 Appendix B of WBD’s Maintaining Vegetated Stormwater Assets (2012) provides details of common weed species. Both declared and environmental/nuisance weeds are incorporated into this list
3
 Application of fertiliser in upstream catchment to be scheduled and measured to maximise nutrient uptake by plants and avoid runoff to WQCP.
^Performance indicators and monitoring triggers outlined in this document are subject to latest specifications provided in peer reviewed journal publications and health regulations. Changes are to be made where appropriate.