upperlands - Institute of Environmental Management and Assessment

16 DrainageThe proposed development will require new sewerage anddrainage infrastructure within the site and will place additionalloadings on both the terminating Wastewater Treatment Works(WwTW) and adjacent watercourses.NI Water has advised that at present the existing foul sewerageinfrastructure and Waste Waster Treatment Works does nothave sufficient capacity to cater for the full additional residentialpopulation. This information has been supplied based on thecapabilities of the 2 operating Rotating Biological Contactors(RBCs) at the terminating WWTW. There is a third RBC at theWWTW, which is not operating as there is no requirement for itat present. NI Water have advised that the third RBC unit canbe brought online and that this additional capacity is likely tofacilitate the majority if the development. Details regarding theexact timing of various phases of the proposed development willbe discussed with NI Water as part of the formal “Application toConnect to a Public Sewer” to take place outside the planningcontext.The plans involve the redevelopment of an urban landscape onthe site and this will therefore involve insignificant alteration tothe current runoff volumes and rate emanating from the site.To reduce the impact of additional stormwater runoff on theexisting watercourses, sustainable drainage elements will beconsidered at design stage, managed in accordance with TheSuDS Manual, and incorporate drainage systems in line with theSUDS principles (equal regard given to water quality, quantityand amenity/biodiversity).The final discharge locations will mimic existing locations to theKnockoneill watercourse, via storm sewers considered at thedetailed design stage.17 ServicesIn order to provide service connections to the proposeddevelopment, modification works will be required to all theexisting NIE and BT services. The scale of the works variesfrom minor service connections to substantial mains extensions,depending upon the specific users requirements i.e. largecommercial supply to the relocated factory and small domesticsupplies to the housing development .A new independent system of road and amenity lighting shallbe included throughout the proposed development and shall bedesigned to DoE current standards for adoption. Where sharedsurfaces exist the street lighting within these area shall beenergized from local ground mounted mini pillarsThe provision of natural gas (Firmus) to the development hasnot been explored as an option for the site as Firmus currentlyhave no plans for extension of the gas network to this area.The primary residual impact of this development will be duringthe construction phase. Except where impractical e.g. high ormedium voltage NIE cabling, all the service provisions will beunderground.18 Overall AssessmentThe proposal has evolved through a detailed analysis of the sitein terms of its assets, constraints and development potential.The EIA process has been undertaken in parallel with the designprocess in an integrated manner so that interactions between thepotential effects have been properly considered and addressedthrough design and mitigation.The long terms environmental implications of the proposalgenerally identify beneficial, long term impacts. These includeadaption and re-use of important listed buildings, retention oflocal employment opportunities, provision of new housingand delivery of enhanced physical, social and environmentalinfrastructure.Following mitigation there will be some slight adverse, residualenvironmental effects including increases in vehicular flows,construction noise/dust and increases in emissions.Page 18UPPERLANDSNON-TECHNICAL SUMMARY, MARCH 2009