16-001014-02A (Ultimate SCMMP)

During the construction phase, inspections should be carried out every month and immediately following storm events.
The construction inspection checklist, which is included in Appendix B2, shall be completed and records of the
inspection shall be kept.
As specified in Section 2.2.3, free draining surface areas are a critical performance indicator in managing mosquitoes
during the construction phase. Therefore standard construction measures will ensure that surfaces are free draining and
no isolated shallow pool areas are formed in the stormwater infrastructure or adjacent to the Bioretention Device.

Proprietary GPTs are to be installed in accordance with manufactures specifications. Refer to HumeGard Installation
Guide or an approved equivalent GPT specifications for installation details.

3.3       OPERATIONAL PHASE / MAINTENANCE
Outlined below are the proposed procedures and methodology for the operational management and maintenance of the
Bioretention Devices. During Operational Phase, regular inspections of the Bioretention Device is required to ensure
vegetation establishes and the properties of the filter media remain effective.

An operational management and maintenance checklist for the Bioretention Devices is provided in Appendix B, which is
further discussed in the following subsections. Operational management and maintenance of the proposed GPTs will be
undertaken to manufacturer’s specifications. Refer to HumeGard Maintenance Guide or an approved equivalent GPT
maintenance guideline for the appropriate management and maintenance methodology.

Inspection Requirements

A checklist has been developed for the Bioretention Devices. The condition and maintenance carried out will be recorded
on the checklist at the time the inspection and/or maintenance is undertaken. A copy of the checklist is presented in
Appendix B.

Maintenance personnel should also be encouraged to report and document changes in vegetation type within the
Bioretention Device. Photographic documentation and mapping of vegetation types are to be recorded annually to
determine changes in vegetation over time. Photographs of each device are to be taken at the same location annually.

Through these procedures a reliable maintenance database can be developed and used to determine if the maintenance
undertaken is ensuring the SQID is functioning as intended.

Except for periods of extended wet weather, mosquitoes are unlikely to be an issue as surface water within the
Bioretention Device is not expected to remain for more than two days.

Weed Removal

Maintenance personnel will need to identify species of both terrestrial and semi-aquatic weeds common to the area. As
the Bioretention Device is a “dry” SQIDs, aquatic weed infestation is unlikely. When weeds have been identified they are
to be removed by hand immediately or eradication methods scheduled before the infestation becomes larger and more
difficult to control. It should be noted that herbicides should not be used in the removal of invasive weeds as this has
negative impacts on downstream water quality.

Replanting

Replanting of vegetation is to be carried out to replace dead or damaged vegetation, vegetation that has been removed
by scour or erosion, or vegetation that is being re-planted following tilling or the replacement of filter media. Removed
vegetation should be replaced by plants of similar size and species, or as indicated on the appropriate Landscaping
Plans.




16-001014-02A | SMCMP | PALM LAKE RESORTS                        COOROY RETIREMENT COMMUNITY, TRADING POST
                                                                                             ROAD, COOROY               | 13