Warrawee Substation - Review of Environmental Factors

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22 February 2012ToBen JamesCopy toFrom Rowena Hamer Tel 02 9239 7397Subject Ecology Section REF Job no. 21/197211.1.1 MethodologyDesktop reviewA desktop assessment was undertaken to identify threatened flora and fauna species, populations andecological communities listed under the TSC Act and FM Act, and matters of national environmentalsignificance (MNES) listed under the EPBC Act that may be affected by the proposal. Database recordspertaining to the study area and locality (i.e. within a 10 km radius of the study area) were reviewed andincluded::• NSW Office of Environment and Heritage (OEH) Wildlife Atlas database for records of threatenedspecies listed under the TSC Act (OEH 2012; data supplied by OEH on 12 January 2012).• Department of Sustainability, Environment, Water, Population and Communities (DSEWPaC)Protected Matters Online Search Tool for MNES listed under the EPBC Act and predicted to occur inthe locality (DSEWPaC 2012; database queried on 21 February 2012).• Department of Primary Industries (DPI) Threatened Species Records Viewer (DPI 2012; databasequeried 21 February 2012) for threatened species listed under the FM Act and recorded within theSydney Metropolitan catchment.• Broad-scale vegetation mapping of south-east NSW to identify threatened ecological communitiesmapped as occurring within the locality of the site (Tozer et al 2010).The habitat resources present at the site (determined during the site inspection) were compared with theknown habitat associations/requirements of the threatened and migratory biota highlighted by thedesktop review. This was used to determine the likelihood of each threatened ecological community,endangered population and threatened or migratory species occurring at the site. The results of thisassessment are presented in Appendix B.Site inspectionA 3 hour site inspection was undertaken by one ecologist on 22 February 2012. The extent of theproposed works was inspected in company with members of the planning and design teams. All floraspecies observed were recorded on pro-forma field sheets. Flora species which could not be identified inthe field were sampled and identified in the office using standard field guides.The site was systematically searched for fauna habitat resources, particularly those of relevance tothreatened biota potentially present in the locality. Examples of habitat resources include hollow-bearing21/19721/178011
trees, known food tree species, wetland areas and rock outcrops. Opportunistic observations of faunaspecies were also recorded: species were identified by sight, by call or by observation of scats, tracks orother traces.1.1.2 Existing EnvironmentThe site is highly modified and shows evidence of historic clearing, soil disturbance and reprofiling, anddumping of fill and construction materials. The site is dominated by a variety of garden ornamental andweed species, with large cleared areas along the railway line and access tracks. The rail corridor issurrounded by residential areas with little connectivity to areas of native vegetation.To the north of Brentwood Avenue, the site slopes up towards Warrawee station and is relatively dry,with planted street trees along the eastern boundary of the rail corridor and a thin strip of nativeunderstorey plants bordering the railway cutting.South from Brentwood Avenue, the site is divided by a steep east-facing slope. Above the slope anddirectly adjacent to the railway line the site comprises cleared grassy areas bordered by a dense thicketof weeds, which continue down the slope. Approximately 20 m south from the northern end of BrentwoodAvenue, stormwater enters the site from a small culvert under the railway track and flows downhill alongthe bottom of the slope, flowing into a small unnamed drainage channel which also passes under therailway track at the southern limit of the site.FloraOne hundred and six flora species from 54 families were recorded during the site inspection, of which 62were exotic (see Appendix A). No threatened flora species were observed or are likely to occur.Cleared grassy areas of the site occur along the railway line and access tracks and are regularly slashedor mowed to provide access and prevent encroachment of vegetation onto the railway line. These areasare dominated by exotic grasses such as Paspalum (Paspalum dilatatum*), Common Couch (Cynodondactylon*) and Narrow-leaved Carpet Grass (Axonopus fissifolius*) and herbs such as Clover (Trifoliumspp.*), Cobbler’s Pegs (Bidens pilosa*) and Dandelion (Taraxacum officinale*). In moist areas in thesouth-east of the site, a variety of moisture-loving grasses and semi-aquatic plants become moredominant, including Kikuyu (Pennisetum clandestinum*), Umbrella Sedge (Cyperus eragrostis*),Creeping Buttercup (Ranunculus repens*) and Juncus usitatus*.The majority of the vegetation is dominated by exotic and ornamental species. Planted street trees occuralong the fence in the eastern side of the site, and include Camphor Laurel (Cinnamomum camphora*),Pin Oak (Quercus palustris*) and Liquidambar (Liquidambar styraciflua*). The majority of these streettrees have been slated for removal due to safety concerns. Dense stands of Bamboo (Phyllostachyssp.*) occur under these trees south from the end of Brentwood Avenue, with occurrences of SweetPittosporum (Pittosporum undulatum), Privet (Ligustrum spp.*) and other weeds. Dense thickets ofLantana (Lantana camara*) and Blackberry (Rubus fruticosus spp. agg.*) dominate the steep slope in thesouth of the site, interspersed with numerous exotic shrubs and climbers such as Wild Tobacco(Solanum mauritianum*), Moth Vine (Araujia sericifera*) and Balloon Vine (Cardiospermumgrandiflorum*).21/19721/1780112
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Section name here (Arial 10pt)Warra
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CDOperational noise and constructio
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PreliminariesWarrawee Station and t
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Preliminaries1.5 Statutory requirem
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Preliminaries(i) the construction o
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Preliminariesmarket mechanisms, tha
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PreliminariesThe strict liability o
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The proposalBuilding formFacilities
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The proposalSite clean-up (Scenario
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The proposalConstructionequipmentRo
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Assessment of the environmental imp
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APPENDIX BMEASURED ONE THIRD OCTAVE
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ReferencesAppendix DAHIMS Search Re
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AHIMS Basic SearchPage 1 of 1Welcom
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