Approved Plans and Documents - OPW22/0303

                  9 February 2023




                  Schedule of Site Visits
                  Purpose of Visit                               Frequency                    J     F      M A M J         J   A   S   O N D
                  Routine Inspection                             Monthly                      √    √       √   √   √   √   √   √   √   √   √   √
                  Annual Inspection                              Yearly                                        √
                  Routine Maintenance                            Twice Yearly                                  √                       √
                  Routine Clean-Out of
                                               Every Two Years                √
                  Sediment
                   Table 1 - General recommended program of inspection and maintenance – Bioretention Basin

                 For additional information and guidance on how to undertake maintenance activities, refer to the
                 Healthy Waterways: Maintaining Vegetated Stormwater Assets Version 1 February 2012.

                 A bioretention basin inspection and maintenance checklist from the Maintaining Vegetated Assets
                 Guideline is attached in Appendix 3.


                 3.1.1.3 Watering
                 Time of year and the climate will determine the frequency of watering. However, during
                 establishment, regular watering is essential for plants. Successfully establishing plants is
                 dependent on the frequency of watering, which in turn is dependent on rainfall, the maturity of the
                 plant stock and the water-holding capacity of the soil. The following watering program is generally
                 adequate but should be adjusted to suit site conditions:

                      •    Week 1 – 6   5 visits per week
                      •    Week 7 – 10 3 visits per week
                      •    Week 11 – 12 2 visits per week

                 In the absence of rain, it is recommended that each plant receives 2.5 – 5.0 litres of water per week
                 during the first six weeks (40mm of watering per week during establishment).

                 After the initial four-month period, watering may still be required, particularly during the first
                 winter or dry period. Watering requirements for healthy vegetation can be determined by ongoing
                 inspections.


                 3.1.2 Rainwater Harvesting Tank

                 3.1.2.1 General
                 The rainwater harvesting tank will capture runoff from part of the development roof area for reuse
                 in basement washdown. No connections will be made to internal plumbing and no irrigation system
                 is proposed on site.

                 The downpipes to the rainwater harvesting tank will be fitted with first flush devices to minimise
                 the initial pollutant load runoff from the roof entering the harvesting tank.




                  Excellence with Economy in Engineering                                                                                           5
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Document Set ID: 22315062
Version: 1, Version Date: 20/02/2023