Review of Environmental Factors - Transport for NSW - NSW ...

outlined in the Landcom/Department of Housing Managing Urban Stormwater, Soils and ConstructionGuidelines (the Blue Book) (Landcom 2004).No operational impacts are expected.Possible Control MeasuresA site specific erosion and sediment control plan will be prepared as part of CEMP. This plan will detailappropriate erosion and sedimentation control measures which will be implemented during the constructionphase. 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 removedfrom 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 methods and facilities.• Soil will be removed from public roads and other paved areas using dry street sweepers or other measures.• Disturbed areas will be replanted, if required.During maintenance activities, any spills will be attended to and treated in an appropriate and timely fashion inaccordance with normal RailCorp procedures4.2 Water Quality and HydrologyExisting SituationIn addition to sediment rich runoff, construction activities can generate contaminated water, such as:• liquid waste from non-destructive excavation• water from spills, and from washing equipment and tools• sewage from the site amenities• water collected in trenches and excavations.Cabbage Tree Creek runs 20 metres north of the site and is part of the Cabbage Tree Creek catchment. Thesuburban stormwater system is situated along the main roads and there is a stormwater drain located onMontague Street at the entrance to the dirt track along which the site will be accessed.The groundwater is not known but is expected to be encountered during excavation.Potential ImpactsWithout appropriate safeguards sediment from excavations and stockpiles) may reach nearby drains anddischarge into local waterways. Increased sedimentation has the potential to harm aquatic life and affect thequality of water downstream. However, the risk of such an occurrence is low, given the distance between theconstruction area and drains and creeks.Page 30 of 67