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BOC Immingham Dissolved Acetylene Project Environmental Statement: Vol. 2 Main Text Mitigation Measures Construction 10.99 With appropriate good working practices and the production and implementation of the CEMP, it is expected that there will be no significant ecological impacts during the construction phase of the development. Therefore no specific mitigation measures are deemed necessary. Operation 10.100 Potential operational impacts will be controlled as a result of the Project design and the implementation of good practice and regulation, monitoring and control measures (e.g. through the EP, discharge consents and the EMS). 10.101 No significant effects on ecological receptors as a result of operation of the facility are anticipated and specific additional mitigation measures are therefore not proposed. Residual Impact Assessment 10.102 Since no mitigation measures are proposed in relation to impacts associated with ecological receptors the significance of impacts does not change from that described above. Recommendations 10.103 Subject to the results of the GI, it is recommended that selection of the type of piling equipment should take noise levels into consideration, with the aim of minimising the level of disturbance to the internationally important population of birds and water voles using Middle Drain. 10.104 The exact requirements and design of the lighting scheme have not yet been finalised. Finalisation of the lighting scheme should take into consideration design features that would reduce light spill onto offsite areas and minimise the impact of lighting on sensitive species. Factors that should be considered include the height, angle and intensity of lighting. 10.105 Any areas within the proposed development site which are not proposed to be developed could be planted with a suitable species-rich grassland mix and any landscape planting within the application site will make use of native species of local provenance where possible. 10.106 Consideration will be given to planting low level scrub between the development and the maintenance strip along Middle Drain (i.e. at a point at least 7 m from the top of the southern bank of Middle Drain). This would help to reduce disturbance to water voles and any other animals using Middle Drain and could generally improve the biodiversity of the site. 10.107 As an additional wildlife enhancement bird boxes and bat boxes could be erected on buildings and structures. 10.108 The western section of the application site will be available as a NEA for nature conservation purposes (Figure 3.4). Habitat suitable for this area would include an area of standing water for amphibians, reptiles and water voles and refugia for amphibians and reptiles such as log piles. A mosaic of species rich grassland and low level scrub, including berry or nut bearing species such as hawthorn, blackthorn and hazel to encourage wildlife, would be suitable for the planting scheme. Detailed design of this area will be finalised in discussion with Humber INCA, Natural England and the NELC Ecologist. 5100935.404 Environmental Statement August 2011 186
BOC Immingham Dissolved Acetylene Project Environmental Statement: Vol. 2 Main Text Summary 10.109 No habitats of importance to nature conservation are to be lost as a result of proposed works. The development area consists primarily of arable land with a negligible value to nature conservation. The land take will be minimal with site compounds constructed within the redline boundary; with only one additional access route constructed off South Marsh Road. 10.110 Key potential nature conservation receptors are: � the wildlife corridor along Middle Drain (the main habitat linking the application site to the Humber Estuary) and water vole using Middle Drain; and � the internationally important populations of birds associated with the Humber Estuary SPA and Ramsar site (and also the nationally important populations of birds associated with the Humber Estuary SSSI and <strong>North</strong> Killingholme Haven Pits SSSI which form part of the internationally important population of birds). 10.111 Water pollution would be controlled during construction and no process water will be discharged into Middle Drain. There would be no direct habitat loss within Middle Drain, although there would be some loss of marginal and aquatic vegetation under the bridge due to shading. Construction works, specifically bridge construction over Middle Drain would result in temporary disturbance of water voles. However, this disturbance would not result in long term displacement of water voles. Operation of the facility is unlikely to cause a significant negative impact on water voles. 10.112 There would be no habitat loss within any designated sites. The only potential negative impacts on designated sites would be to the nationally and internationally important populations of birds associated with the Humber Estuary using the surrounding arable fields at high tide. There is the potential for disturbance of these birds from noise and visual perturbation (presence of people, machinery, and lighting). This will be of temporary duration with the most likely disturbing activity, piling, only taking in the region of three weeks to complete and worst case noise predictions, which are unlikely to be a reality, indicate that birds are unlikely to be disturbed such that they would be displaced from the surrounding high-tide roosts. 10.113 Although significant negative impacts as a result of construction activities are not predicted a COMP is proposed which would be part of the CEMP. The COMP would monitor and record behavioural changes of birds associated with the Humber Estuary SPA as a result of hydraulic hammer piling or rotary piling using a large rig (if these piling methods were used). A statement of intent for the COMP is included within the HRA Stage 2 AA provided in Appendix 10A. The contents of the COMP would be agreed with NE, Humber INCA and the NELC Ecologist. 10.114 An operational noise limit has been set for Poplar Farm (at a distance of 550 m from the development site), and earth bunds will screen visual disturbance of birds. Birds are likely to habituate to operational activities within the development as evidenced by birds using high-tide roosts immediately adjacent to existing similar industrial sites within the South Humber Bank. 10.115 The key findings of the ecological assessment are that given the measures within the project design, no significant negative ecological effects are predicted. 5100935.404 Environmental Statement August 2011 187
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