CONSTRUCTION ENVIRONMENTAL MANAGEMENT PLAN

More documents

Recommendations

Info

Construction Environmental Management Plancontainment and re-use of water on-site; andthe implementation of water management controls to minimise the potential for impacts to off-site waterresources.The primary design goal of the Project water management system is that of no discharge to the Hunter Riverduring operation of the Project.Water Management SystemThe Project water management system will be progressively developed as Project water managementrequirements change over time.Water Management – ConstructionTemporary erosion and sediment controls (e.g. silt fences and construction settling ponds) will be installed priorto the commencement of Stage 2F construction activities. Silt curtains will be installed adjacent to disturbanceareas that may create excessive disturbance during construction works in the wharf facilities and shiploaderarea.The site drainage network was established at the commencement of Stage 1 construction activities to capturesite runoff. Runoff captured from the coal storage area will be treated by way of sediment control structures andreused on-site.Water Management – OperationA network of water management structures will be used to manage runoff on and around the construction site.All long-term site water management structures have been lined to minimise the potential for leakage.Stormwater runoff from areas external to the Project site will be directed around the Project infrastructure areasby table drains and culverts to the existing stormwater drainage system on Kooragang Island. Stormwater runoffcollected on the Project infrastructure areas will be diverted through sediment control structures and/or toconstruction settling ponds. Lined sumps have been installed where necessary at the end of the open drains toact as pollutant traps.The coal storage area has been sloped with dedicated drains located along the pads and berms. A sub-gradedrainage system has been incorporated into the coal stockpile pads to capture water infiltrating through the coalstockpiles. The sub-grade drainage system comprises of a series of underground drains, pits/sumps andtransfer pumps to control drainage from the coal storage area.The primary and secondary settling ponds and overflow pond have been constructed to the north of the coalstorage area. The settling ponds capture sediments not trapped in the construction settling ponds at the end ofopen drains. Water in the overflow pond is pumped to two raw water tanks each with a capacity of 4 mega litres(ML). The raw water tanks store water for re-use on-site for purposes such as dust suppression, fire protection,plant washdown and landscape management.A 2 ML tank has been installed for emergency fire fighting situations. Pumping stations are located adjacent tothe water tanks for water reticulation on-site.Stormwater runoff from the areas adjacent to the Project rail infrastructure area is diverted via table drainsparallel to the Project rail infrastructure corridor and into the existing drainage system across the KIWEF.Sediment control structures/settlement ponds have also be installed at the train unloading stations and the wharffacilities and shiploader area. Water collected in these ponds will be transferred via pump and pipeline to theprimary and secondary settling ponds.Consistent with the design goal of no discharge to the Hunter River during operations, the construction settlingponds, primary and secondary settling ponds and the overflow pond constructed with sufficient capacity tocontain the design average recurrence interval (ARI) rainfall event. All Project water management structures willbe operated in accordance with the requirements of the Project EPL.10
Construction Environmental Management PlanGroundwater ManagementThe Project site includes a relatively shallow groundwater table in areas of fill from previous landuse activities.Consequently, any interception of the groundwater table during Project construction activities or effect on thegroundwater system as a result of Project operations will need to be managed. NCIG has incorporated into thedesign of the Project a comprehensive suite of construction methods and design systems (including contingencymeasures) (NCIG, 2006b). Groundwater management measures for specific Project elements include:Sampling and characterising quality of existing groundwater in and around the rail infrastructure corridor Inaccordance to Conditions 2.45A and 2.45B in Schedule 2 of the Project Approval (06_0009), wherebyappropriate quality trigger values are obtained. A Groundwater monitoring program must commence at leastone month prior to the commencement of construction, as to identify changes in groundwater quality frompre-construction conditions. This program will include contingency measures in the event of trigger valuesbeing exceeded during the course of the program and construction.Any groundwater that is dewatered from the Project excavations and is not considered suitable for re-usemay be temporarily stored in dedicated cells with low permeability liners (e.g. compacted clay orgeo-membrane) before being treated for re-use and/or removed from site by an appropriately licensedcontractor. The treatment and storage requirements of any groundwater will be dependent upon waterquality.The use of piled foundations together with diaphragm sub-surface perimeter walls for construction of thetrain unloading stations and adjacent conveyors to minimise groundwater inflow or connection.Incorporation of a low permeability capping layer into the rail embankment formation to minimise infiltration.Groundwater monitoring in accordance with the requirements of EPL 12693 and Condition 7.2c (iv)Schedule 2 of the Project Approval (06_0009).If the groundwater monitoring program indicates the need, the implementation of groundwater managementcontingency measures such as:localised temporary pumping of groundwater for subsequent detention, dilution, evaporation, treatmentand/or disposal by an appropriately licensed contractor (depending on water quality and quantity);and/orthe construction of localised sub-surface groundwater barriers (e.g. bentonite filled trench orgeo-membrane) to control groundwater migration.Site Water Supply - ConstructionOnly minor quantities of water will be required during construction activities. Construction water (e.g. water usedfor dust suppression and moisture conditioning of earthworks) will be supplied from stormwater contained on-site,or if necessary, purchased from the Hunter Water Corporation.Infrastructure and ServicesAdministration and Workshop BuildingsThe administration building is a single storey structure containing a reception area, offices, meeting rooms,general workstation areas, lunchroom, kitchen, first aid room, restrooms and lockers for up to 120 people(i.e. allowance made for visitors, short term contractors and latent capacity).The workshop building contains a small stores section, chemical storage, fuel storage, general maintenance bay,unloading area and outdoor secure storage area. A vehicle washdown facility is also located adjacent to theworkshop. The building is fitted with an electric crane to facilitate work on equipment and the unloading of trucks.The store area is suitable for forklift access and adjacent unloading of heavy/oversize vehicles.The administration and workshop areas will be progressively landscaped with selective tree planting, formalgardens and grassed areas in keeping with the “shop front” location on the public road.11
Page 1 and 2: NEWCASTLE COALINFRASTRUCTURE GROUPC
Page 3 and 4: Construction Environmental Manageme
Page 7 and 8: L.P.//////// / / // / / ///////////
Page 13: Construction Environmental Manageme
Page 17 and 18: Project ComponentLand Reclamation a
Page 21 and 22: Project DirectorProject ManagerProj
Page 23 and 24: Project ControlsManagerProcurement

CONSTRUCTION ENVIRONMENTAL MANAGEMENT PLAN

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?