Hornsby Stormwater Conditions

66. Community Centre Completion (Mod B) The approved community centre/Leisure Centre for the retirement village must be completed and operational. CONDITIONS OF CONCURRENCE - TRANSPORT FOR NSW (LETTER DATED 17 OCTOBER 2011) The following conditions of consent are from the nominated State Agency pursuant to Section 4.13 of the Environmental Planning and Assessment Act 1979 and must be complied with to the satisfaction of that Agency. 66A. TfNSW Condition 1 (Mod C) The property is affected by a road widening along the Galston Road frontage of the property. All development proposals for future buildings or structures must be erected clear of the land required for the road. 66B. TfNSW Condition…

75. Public Utilities (Mod B) The developer shall be responsible for all public utility adjustment/relocation works, necessitated by the above work and as required by the various public utility authorities and/or their agents. ADDITIONAL CONDITIONS OF CONCURRENCE - TRANSPORT FOR NSW (LETTER DATED 17 FEBRUARY 2022) The following conditions of consent are from the nominated State Agency pursuant to Section 4.13 of the Environmental Planning and Assessment Act 1979 and must be complied with to the satisfaction of that Agency. 75A. TfNSW Condition 1 (Mod C) All buildings and structures, together with any improvements integral to the future use of the site are wholly within the freehold property…

57. Approved Works within Tree Protection Zone Incursions a) Where tree root pruning is required for the installation of piers, driveway or underground services, the pruning must be overseen by the AQF 5 project arborist and must be undertaken as follows: i. Using sharp secateurs, pruners, handsaws or chainsaws with the final cut being clean. ii. The maximum diameter of roots permitted to be cut is 50mm. b) Where the building footprint enters or transects the Tree Protection Zones of trees to be retained, sensitive construction techniques in the form of screw pilings or piers, cantilevered or suspended slab design must be employed to create a 100mm clearance above existing soil grade unless…

86. Prior to issue of any Construction Certificate a) All buildings and structures, together with any improvements integral to the future use of the site are to be wholly within the freehold property (unlimited height or depth), along the Castle Hill Road boundary, access to the TfNSW easements are not to be denied; and the integrity of the TfNSW easements are not to be compromised. b) The civil works on Castle Hill Road shall be in accordance with TfNSW requirements. Details of these requirements should be obtained by email to developerworks.sydney@transport.nsw.gov.au. c) Detailed design plans of the proposed works are to be submitted to TfNSW for approval prior to the issue of a…

6. Soil and Water Management Plan (SWMP) prepared by a suitably qualified environmental consultant/soil scientist in accordance with the Managing Urban Stormwater - Soils & Construction, 2004 Manual, and submitted to Council. The SWMP is to detail the sediment and erosion control measures to be implemented during all construction stages of the development and shall incorporate a plan to scale of 1:500 or larger, and the following Site survey which identifies contours and approximate grades and the direction(s) of fall; A Soil and Water Management Plan (SWMP)prepared by a suitably qualified consultant in accordance with the Managing Urban Stormwater - Soils & Construction, 2004 Manual. The…

6. A Soil and Water Management Plan (SWMP) prepared by a suitably qualified consultant in accordance with the Managing Urban Stormwater – Soils & Construction, 2004 Manual. The SWMP is to detail the sediment and erosion control measures to be implemented during the construction of the proposed development and is to be submitted incorporating a plan to scale of 1:500 or larger and supporting information. The following information must be included within the SWMP: a. Site survey which identifies contours and approximate grades and the direction(s) of fall. b. Locality of site and allotment boundaries. c. Location of adjoining road(s) and all impervious surfaces. d. Location of site within…

1. Connected to an existing Council piped drainage system with the following requirements: a. A separate Application must be made to Council for ‘Approval to Connect Stormwater Drainage Outlet to Council’s System’ with all fees paid, prior to connecting to Council’s drainage system. b. The connection to Council’s drainage pit or pipeline in accordance with Councils Design Standard Drawing No. 6 must be inspected by a Council Engineer from Council’s Planning Division. c. Note: An inspection booking can be made by calling Council on 9847 6760 quoting the Application reference number commencing SD d. A Traffic Control Plan (TCP) must be prepared by a qualified traffic controller in accordance…

13. Erosion and Sediment Control Plan (ESCP) (modified - Mod B) In order to protect the adjoining land and downstream water quality from sedimentation, an Erosion and Sediment Control Plan (ESCP) related to each of Stages 1, 2 ,3 ,4, 5 is to be prepared by a suitably qualified consultant in accordance with the Managing Urban Stormwater - Soils & Construction, 2004 Manual, and submitted to Council for approval. The ESCP is to detail the sediment and erosion control measures to be implemented during all stages of construction and is to be submitted incorporating a plan to scale of 1:500 or larger and supporting information. The following must be addressed within the ESCP: a) Site survey which…

5. Integrated within the kitchen design, dual pull-out under bench waste bins must be incorporated in the joinery of the kitchen. Every residence must be provided with two containers approximately 15-30L each, one each for general waste and recycling, stored within a kitchen cupboard. Note: 240L bins are 600mm wide, 750mm deep and 1100mm high. Allow 75mm between bins for ease of manoeuvring them in and out of position and to avoid damage to walls from scraping. Reason: To ensure all necessary infrastructure is provided for the efficient and effective management of waste for the full operational life of the development. Sydney Water Building Plan Approval The plans must be approved by Sydney…

59. Creation of Easements The following matters must be nominated on the title of the subject property under s88B of the Conveyancing Act 1919: a) The creation of an appropriate "Positive Covenant" and "Restriction as to User" over the constructed on-site detention/retention systems and outlet works, within the lots in favour of Council in accordance with Council’s prescribed wording. The position of the on-site detention system is to be clearly indicated on the title. b) To register the OSD easement, the restriction on the use of land “works-as-executed” details of the on-site-detention system must be submitted verifying that the required storage and discharge rates have been constructed…

55. On Site Stormwater Detention (Mod B) Provision must be made for design and construction of on-site stormwater detention system by a chartered civil engineer and constructed in accordance with the following requirements: e) Have a capacity of not less than 7 1150 cubic metres, and a maximum discharge (when full) of 700 482 litres per second. f) High Early Discharge pits are not used. g) Have a surcharge/inspection grate located directly above the outlet. Emergency overflow weir systems shall be designed and constructed for excesses of the 100 year ARI and disposed of to the downstream drainage system. h) Discharge from the detention system to be controlled via 1 metre length of pipe, not…

26. On Site Stormwater Detention (modified - Mod B) An on-site stormwater detention system related to each of Stages 1, 2, 3, 4 and 5 of the development must be designed by a chartered civil engineer and constructed in accordance with the following requirements: a) Be designed and constructed in accordance with the plans and report prepared by PTC Consulting Engineers. b) Have a surcharge/inspection grate located directly above the outlet. c) Discharge from the detention system must be controlled via 1 metre length of pipe, not less than 50 millimetres diameter or via a stainless plate with sharply drilled orifice bolted over the face of the outlet discharging into a larger diameter pipe…

2. Each toilet must: a. Be a standard flushing toilet connected to a public sewer; or b. Be a temporary chemical closet approved under the Local Government Act 1993; or c. Have an on-site effluent disposal system approved under the Local Government Act 1993. Reason: To ensure adequate toilet facilities are provided. Erosion and Sediment Control Measures Install and maintain adequate sediment and erosion control measures for the duration of all works, until such a time that sediment, sediment laden water or any other material/substance can no longer migrate from the premises. The measures are to be installed and maintained in such a manner as to prevent sediment, sediment-laden water, or any…

35. Erosion and Sediment Control (modified - Mod B) To protect the water quality of the downstream environment, erosion and sediment control measures must be provided and maintained throughout the construction period relevant to each of Stages 1, 2, 3, 4 and 5 in accordance with the manual ‘Soils and Construction 2004 (Bluebook)’, the approved plans, Council specifications and to the satisfaction of the principal certifying authority. The erosion and sediment control devices must remain in place until the site of the relevant works has been stabilised and revegetated. Note: On the spot penalties may be issued for any non-compliance with this requirement without any further notification or…

39. Sydney Water Building Plan Approval The plans must be approved by Sydney Water prior to demolition, excavation or construction works commencing. This allows Sydney Water to determine if sewer, water or stormwater mains or easements will be affected by any part of your development. Any amendments to plans will require re-approval. Please go to Sydney Water Tap in® to apply. Note: Sydney Water recommends developers apply for a Building Plan Approval early as to reduce unnecessary delays to further referrals or development timescales. Reason: To ensure the development complies with the requirements of Sydney Water. Attachment A: Draft Conditions Page 29

22. Environmental Management (Mod B) The site must be managed in accordance with the publication ‘Managing Urban Stormwater - Landcom (March 2004) and the Protection of the Environment Operations Act 1997 by way of implementing appropriate measures to prevent sediment run-off, excessive dust, noise or odour emanating from the site during the construction of the development. 15 To prevent sediment run-off, excessive dust, noise or odour emanating from the site during the construction, the site must be managed in accordance with the publication ‘Managing Urban Stormwater - Landcom (March 2004) and the Protection of the Environment Operations Act 1997.

15. Erosion and Sediment Control (Mod B) To protect the water quality of the downstream environment, erosion and sediment control measures must be provided and maintained throughout the construction period in accordance with the manual ‘Soils and Construction 2004 (Bluebook)’, the approved plans, Council specifications and to the satisfaction of the principal certifying authority. The erosion and sediment control devices must remain in place until the site has been stabilised and revegetated. Note: On the spot penalties may be issued for any non-compliance with this requirement without any further notification or warning.

28. Water Saving Urban Design A Water Saving Urban Design (WSUD) is to be constructed generally in accordance with the engineering report Civil Stormwater Report Ref: 201537 CAAA Iss. M prepared by TTW Consulting Engineers, dated 1 July 2024 and the Water Quality Management Schematic Plan prepared by TTW Consulting Engineers, Drawing No. C076 (P2), dated 28 June 2024. The Water Quality Targets as detailed within the report and Hornsby Development Control Plan 2024 are to be achieved in the design. Reason: To ensure proper stormwater and water quality management.

9. Storage of Flammable and Combustible Goods Flammable and combustible liquids must be stored in accordance with Australian Standard AS1940 The storage and handling of flammable and combustible liquids. All liquid wastes are to be stored in a bunded area. The bund is to be made of impervious material and be designed to provide a volume equal to 110% of the largest container, to prevent any spillage entering into the stormwater system. DA/14/2024 Pag e | 4 Reason: To protect the environmental health and safety of the public and workers.

74. Works as Executed Plan (modified - Mod B) Prior to issue an Occupation Certificate relevant to each of Stages 1, 2, 3, 4 and 5 of the development, A works-as-executed plan(s) must be prepared by a registered surveyor and submitted to Council for completed road pavement, kerb & gutter, public drainage systems, driveways and on-site detention system. The plan(s) must be accompanied by a certificate from a registered surveyor certifying that all pipelines and associated structures lie wholly within any relevant easements.

87. Prior to issue of any Occupation Certificate A stormwater easement in favour of TfNSW shall be created within the private lots allowing TfNSW future access for maintenance of the stormwater infrastructure. CONDITIONS OF CONCURRENCE - SYDNEY METRO The following conditions of consent are from the nominated State Agency pursuant to Section 4.13 of the Environmental Planning and Assessment Act 1979 and must be complied with to the satisfaction of that Agency.

71. Stormwater Discharge (Mod B) The post-development storm water discharge from the subject site into the TfNSW drainage system should not exceed the pre-development discharge. Detailed design plans and hydraulic calculations of any changes to the stormwater drainage system on Galston Road should be submitted to TfNSW for review. A plan checking fee will be payable and a performance bond may be required before TfNSW approval is issued.

56. Maintenance of Water Management Devices All water and stormwater infrastructure and devices (including drainage systems, sumps and traps) must be regularly maintained to remain effective. All solid and liquid wastes collected from the device must be disposed of in accordance with the Protection of the Environment Operations Act 1997. Reason: To ensure systems are maintained to protect the environment. DA/820/2024 Pag e | 23

61. Certification of WSUD Facilities (modified - Mod B) Prior to the issue of an Occupation Certificate relevant to each of Stages 1, 2, 3, 4 and 5 of the development a certificate from a Civil Engineer is to be obtained stating that the WSUD facilities have been constructed for that stage of work and will meet the water quality targets as specified in the Hornsby Development Control Plan 2013.

27. On Site Stormwater Bioretention and Detention System An on-site stormwater bioretention and detention system must be generally in accordance with Civil Stormwater Report and Concept Stormwater Management Plan, prepared by TTW Consulting Engineers, Drawing No. C071 (P15) and C072 (P10), dated 28 June 2024 and constructed in accordance with the following requirements:

40. Environmental Management (modified - Mod B) To prevent sediment run-off, excessive dust, noise or odour emanating from the site during the construction, the site relevant to each of Stages 1, 2, 3, 4 and 5 must be managed in accordance with the publication ‘Managing Urban Stormwater - Landcom (March 2004) and the Protection of the Environment Operations Act 1997.

89. Certification of WSUD Facilities Prior to the issue of an Occupation Certificate a certificate from a Civil Engineer is to be obtained stating that the WSUD facilities have been constructed and will meet the water quality targets as specified in the Hornsby Development Control Plan 2024. Reason: To ensure appropriate water management and statutory compliance.

60. Works as Executed Plan A works-as-executed plan(s) must be prepared by a registered surveyor and submitted to Council for completed road assets, refuges, medians, pavements, kerb & gutter, public drainage systems, driveways, internal drainage works, catch drains and on-site detention systems relevant to each stage of the development.

11. The provision of safety rails where there is a level difference more than 0.3 metres and a 1:4 batter cannot be achieved. Reason: To ensure proper stormwater and water quality management.

3. Not be constructed in a location that would impact upon the visual or recreational amenity. Reason: To ensure appropriate provision for management and disposal of stormwater.

1. The stormwater drainage system for the development must be designed for an average recurrence interval (ARI) of 20 years and be gravity drained.

58. Erosion and Sediment Control All control measures nominated in the Erosion and Sediment Control plan must be implemented to ensure:

11. Erosion and Sediment Control Measures Prior to the commencement of all work and/or quarrying operations under this consent:

46. Erosion and Sediment Control Measures