Newlands Cross Upgrade EIS - European Investment Bank

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South Dublin County Council N7 Newlands Cross Upgrade Environmental Impact Statement 15. SUMMARY OF MITIGATION MEASURES, RESIDUAL IMPACTS AND INTERACTION EFFECTS 15.1 Introduction Arup Consulting Engineers This Chapter summarises the full range of mitigation measures and the subsequent residual impacts that have been outlined in the individual specialist chapters, for the proposed Newlands Cross Junction Upgrade as a whole. The Roads Act 1993 (as Amended) specifies the information to be contained in an EIS (see Section 1.4), and also requires a description of the likely significant environmental interactions between these environmental effects. This Chapter addresses the environmental aspects that are common to more than one specialist subject addressed in the individual sections of the EIS and also identifies the main interactions between different effects. Only topics, which could logically be linked to this project, have been examined in detail. Accordingly, where a topic is not mentioned or discussed, it has been concluded that no potential for impact exists. Human Beings and Health are addressed throughout the EIS, but not specifically in one section, e.g., the economic and social considerations are detailed in the Material Assets Chapter. The effects of the development on Human Beings with regard to Traffic & Transport, Noise & Vibration, Landscape & Visual, Air Quality and Climate are also addressed in their respective chapters. 15.2 Summary of Mitigation Measures 15.2.1 Soils, Geology and Hydrogeology 15.2.1.1 Construction Phase • During the construction phase all possible measures will be made to protect the geology of the site. Where possible an area will be left intact until construction is ready to begin. Stripping of topsoil etc. will not be undertaken until absolutely necessary as this can lead to erosion. • Excavation of soil is required for the proposed road construction and cannot be avoided. No mitigation measures are proposed. • Compaction of the soil underlying the proposed road cannot be avoided and no mitigation measures are proposed. • Topsoil is a valuable natural resource with high reuse potential and may be suitable for reuse as a landscaping material. Topsoil should be carefully excavated and stored separately from other excavated overburden materials to maximise its reuse potential. • Excavated made ground (excluding areas of existing road pavement) will generally be unsuitable for re-use for engineering purposes, but may be acceptable for landscaping. Testing to the appropriate standards will determine the potential of the material to be reused for non-engineering purposes. • Excavated materials intended for reuse may deteriorate due to materials handling, storage and exposure to adverse weather conditions and become unsuitable. Any materials that deteriorate and become unsuitable will be removed from site. December 2007 Page 235
South Dublin County Council N7 Newlands Cross Upgrade Environmental Impact Statement Arup Consulting Engineers • Excavated ground that is unsuitable for reuse on site will be disposed off-site to an appropriately permitted or licensed disposal/recycling facilities. Any potentially contaminated materials to be removed off-site will be tested according to the requirements of the Waste Management Act, 1996, and associated regulations including the EU Landfill Directive and its Annexes, as well as the requirements of the receiving facility. • The use of rock breakers should be adopted to break up any rock in service trenches to minimise the volume of rock excavated. 15.2.1.2 Operational Phase • Once operational, the geology on site will be protected from the elements. Subsoil will either have a surface road dressing or topsoil covering it and topsoil will be grassed to prevent erosion, no rock will be exposed. • Planting of slopes and correct drainage will protect against erosion of material or leaching of nutrients. • No road drainage outfalls from the proposed road development discharge to existing watercourses. All drainage discharges are proposed to outfall to existing surface water sewers. Petrol interceptors and emergency spill containment facilities will be incorporated at outfalls as appropriate. These facilities will be installed as a risk management measure to help prevent any adverse impacts from potential spillage from road accidents. Refer to Section 15.2.9. 15.2.2 Landscape and Visual 15.2.2.1 Construction Phase • The visual impact during construction phase will be mitigated by appropriate site management measures to ensure the site is kept tidy, dust is kept to a minimum, and that public areas are kept free from building material and site rubbish. • Appropriate site hoardings will be put in place around the perimeter of the site. Car parking will be provided for construction staff on site to prevent parking on the surrounding road network. • The impact will be temporary and to ensure the time frame for construction is as short as possible, taking into account health and safety issues, proper site management procedures will be implemented to ensure that the works are completed on programme. • The landscape impact will be mitigated by the implementation of proper tree protection measures. • The proposed landscaping will reinstate disturbance arising from the construction phase. 15.2.2.2 Operational Phase • The elevational treatment of the retaining structures – selection of materials and colours to compliment the surrounding built environment. • Insertion of a high quality landscape design as visual buffering along the northern boundary of the Newlands Golf Course. • Retention of the existing tree planting adjacent to the site through the implementation of appropriate tree protection measures during construction. • Consistency in the appearance of the selected materials along the road corridor – road signage, lighting, barriers etc. December 2007 Page 236
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Page 288: PLATES
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APPENDIX A8 - NOISE AND VIBRATION
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APPENDIX A9 - AIR QUALITY
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APPENDIX A11 - ECOLOGY
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APPENDIX A12 - ARCHAEOLOGY, ARCHITE
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Newlands Cross Upgrade EIS - European Investment Bank

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