Stanwell Park Tunnel REF - Transport for NSW - NSW Government

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Control Measures Site specific Erosion and Sediment Control measures will be identified as part of ECM. The proposed measures will be in accordance with the ‘Blue Book’ (Managing Urban Stormwater: Soils and Construction 4 th Edn (Landcom, 2004), and will be implemented during the construction phase. The measures will include, but not be limited to, those outlined below. All spoil will be transferred directly to skip bins or stockpiled appropriately Appropriate stockpiling of materials will take place away from drainage lines, waterways and drains Any soil that may be contaminated or weed infested will be stockpiled separately before being removed from the site Sediment fences and bunds will be installed and inspected regularly The tracking of soils on public roads will be prevented by using appropriate shaker grids/ballast pads Soil will be removed from public roads and other paved areas using dry street sweepers or other measures Disturbed areas will be reinstated, if required During maintenance activities, any spills will be attended to and treated in an appropriate and timely fashion in accordance with TfNSW procedures. 4.2 Water Quality and Hydrology Existing Situation The nearest waterway, Stanwell Creek, is about 116 metres southwest of the Location 2 and flows directly into the Tasman Sea. The suburban stormwater system is situated along the main roads (i.e. Lawrence Hargrave Road) however there are none within close distance to the proposed site. The groundwater depth is not known and no data is available, however due to the topography and elevation of the proposed site, it unlikely that groundwater will be encountered during construction. According to Wollongong Council, 1 in 100 year (ARI) flood mapping indicates the site is not within a flood prone area. Page 32 of 72
Possible Risks There is a risk that the local underground water table may be reached and groundwater may be encountered during pile boring activities. While this is not expected to occur at this site, it remains the major risk in respect of water quality and hydrology. The CEMP, ECM and Water Management Plan will contain procedures to manage this risk if it eventuates. Potential Impacts In addition to sediment rich runoff, the following wastewater types can be generated by construction activities: Liquid waste from non-destructive excavation; Water from spills; Sewage from the site facilities; and Water collected in trenches and the pit. Without appropriate safeguards, contaminants may reach nearby drains and discharge into local waterways. These contaminants may have the potential to harm aquatic life and affect the quality of water downstream. However, the risk of such occurrence would be minimised through implementation of measures provided in the control measures listed below. Rain or groundwater may enter the excavations. If inappropriately managed, sediment-laden water could be discharged into local water bodies and/or the nearby stormwater system. No operational impacts are expected. The works will not affect the landform or the flow of water in the area. Control Measures During construction water quality impacts will be minimised through a range of control measures in addition to the erosion and sedimentation controls included in Section 4.1. The water quality measures will include, but will not be limited to those outlined below. A Water Management Plan will be prepared before construction begins to determine the most appropriate method for water disposal should groundwater be encountered during pile boring activities. A geological engineer will be present during the boring of the pile and work will cease immediately if groundwater is encountered. The water will be tested according to industry standards to determine the presence of contaminants or other materials. This will determine the most appropriate method of water disposal. If water is encountered, special construction methodologies will be adopted to prevent a continuing flow of groundwater to the surface. Ensure construction materials are not left in the vicinity of stormwater drains. Trenches and excavations will be covered to prevent rainwater entering. Page 33 of 72
Page 1 and 2: Digital Train Radio System Stanwell
Page 3 and 4: 4.13 Electromagnetic Energy (EME) .
Page 5 and 6: Approval Process The proposal is be
Page 7 and 8: 1 Introduction 1.1 Background to th
Page 9 and 10: Site Co-ordinates Location 1: Latit
Page 11 and 12: Location 1 Location 2 Figure 2 Site
Page 13 and 14: A letter will be sent to all proper
Page 15 and 16: 2.2 State Environmental Planning Po
Page 17 and 18: State Environmental Planning Policy
Page 19 and 20: Roads Act 1993 Under Section 138 of
Page 21 and 22: Table 1 Consideration of ESD for th
Page 23 and 24: 3 Description of the Proposal 3.1 S
Page 25 and 26: Construction on the DBS facility wi
Page 27 and 28: The skip bin and site compound area
Page 29 and 30: It operates on a spectrum of 1800 M
Page 31: 4 Environmental Impact and Risks 4.
Page 35 and 36: Disturbed areas will be rehabilitat
Page 37 and 38: 4.5 Noise and Vibration Existing Si
Page 39 and 40: Distance to Approx. construction No
Page 41 and 42: A search for known items of Aborigi
Page 43 and 44: A search of OEH register of contami
Page 45 and 46: Visually sensitive receivers in the
Page 47 and 48: where trenching is required is not
Page 49 and 50: 4.14 Traffic and Access Existing Si
Page 51 and 52: cumulative construction impacts, th
Page 53 and 54: Clause 228 Factor Impacts Comments
Page 55 and 56: Factor (Commonwealth Legislation) I
Page 57 and 58: specifications. Regular inspection
Page 59 and 60: the presence of waste and/or other
Page 61 and 62: Light Spill No specific control mea
Page 63 and 64: Appendix 1: Principles from the Tel
Page 65 and 66: Principle 2: Telecommunications fac
Page 67 and 68: Principle Proposal aerodrome or air
Page 69 and 70: Principle (m) The likelihood of har
Page 71 and 72: Appendix 3: Database Searches Extra

Stanwell Park Tunnel REF - Transport for NSW - NSW Government

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