Project: Arcadia Branch 1 Flowline Project No. 229110 Ecological Assessment Report Prepared for: Santos Ltd Report ref: 229110 Arcadia Branch 1 Flowline – Lot 5 on 18 April 2012 TR18
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Document prepared by: Aurecon Australia Pty Ltd ABN 54 005 139 873 Level 14, 32 Turbot Street Brisbane QLD 4000 Locked Bag 331 Brisbane QLD 4001 Australia
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Report Title Arcadia Branch 1 Flowline – Lot 5 on TR18
Document ID 229110 Project Number 229110
File Path
Client Santos Ltd Client Contact
Rev Date Revision Details/Status Prepared by Author Verifier Approver
0 2 April 2012 Draft for Internal Review KH CA VJB/GAP JS
1 18 April 2012 For client issue VJB CA VJB/JS JS
Current Revision 1
Approval
Author Signature Approver Signature
Name Cassandra Arkinstall Name Jane Stark Environmental Title Ecologist Title Scientist
Project 229110 | File Santos Ecolo gical Assessment Report Arcadia Branch 1 Flowline FINAL_Rev1.docx | 18 April 2012 | Revision 1
Arcadia Branch 1 Flowline Ecological Assessment Report
Date | 18 April 2012 Reference | 229110 Revision | 1
Aurecon Australia Pty Ltd ABN 54 005 139 873 Level 14, 32 Turbot Street Brisbane QLD 4000 Locked Bag 331 Brisbane QLD 4001 Australia
T +61 7 3173 8000 F +61 7 3173 8001 E [email protected] W aurecongroup.com
Contents 1 Background 2 1.1 Project description 2 1.2 Purpose of report 2 2 Methodology 5 2.1 Desktop methodology 5 2.2 Field methodology 5 3 Ecological assessment 6 3.1 Arcadia Branch 1 Flowline 6 4 Conclusion 10 5 References 11
Appendices
Appendix A Flora Species List
p 1
1 Background
1.1 Project description Santos Ltd (Santos) have commissioned Aurecon Australia Pty Ltd (Aurecon) to undertake ecological investigations of proposed areas of development for the Fairview gas fields (including developments in the Arcadia Valley). The Fairview gas fields are situated approximately 40 km from Injune in southern Queensland, and Arcadia Valley is located approximately 85 km north of the Injune township. The vegetation in this areas is dominated by Eucalyptus and White Cypress Pine woodland, Brigalow and Semi-evergreen Vine Thicket (Eddie, 2007). Much of this area has been subjected to cattle grazing and other agricultural practices as well as previous development associated with the gas fields. This report is specific to the proposed Arcadia Branch 1 Flowline shown in Figures 1.1 and 1.2. Figure 1.1 shows the current Regional Ecosystem (RE) Mapping (Department of Environment and Resource Management, version 6.1, 2011), and Figure 1.2 depicts the REs as confirmed during field investigations in relation to the Flowline (shown as the yellow line in both figures). This area is referred to as the ‘proposed development area’, and is located entirely within Lot 5 on TR18. Note that the subject of this report is solely related to Lot 5 on TR18. Where survey areas overlap additional properties, these sites will be further addressed in the report relevant to those properties/lots.
1.2 Purpose of report The purpose of this report is to provide an ecological assessment of the proposed development area located on Lot 5 on TR18 (Figures 1.1 and 1.2), to confirm the REs present within the proposed development area, and to identify areas and species of notable ecological or conservation value. This report does not make any recommendation regarding the development in relation to any Santos environmental authorities or other approvals.
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Notes:
11.10.13a/11.10.1 60/40 P:\Aurecon\215648Santos\Mapping\Arcadia_Realignment.mxd 29/03/2012 15:32
Mapby: ZontaRA Date: 30/03/12 1Version:
A3 scale: 1:17,500 Job No: 215648 Arcadia Branch 1 Flowline ° 0 200m Coordinate system: GCS GDA 1994 Figure 1.1: Proposed development area and Regional Ecosystems
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11.10.8/11.9.5 11.10.8/11.9.5 60/40 11.10.8/11.9.5 Legend 60/40
11.10.8/11.9.5 60/40 Drainage (100K) Arcadia Scout Data
11.9.5 DCDB Parcels (Lite) 11.9.5 Arcadia Vegetation Polygon Endangered - Dominant Endangered - Sub-dominant
11.10.8/11.9.5 Non-remnant / regrowth 11.3.25 60/40 Not Of Concern
11.10.8/11.9.5 60/40 11.10.8/11.9.5 60/40
11.10.8/11.9.5 60/40
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Notes: P:\Aurecon\215648Santos\Mapping\Arcadia_Realignment.mxd 29/03/2012 15:32
Mapby: ZontaRA Date: 30/03/12 1Version:
A3 scale: 1:17,500 Job No: 215648 Arcadia Branch 1 Flowline ° 0 200m Coordinate system: GCS GDA 1994 Figure 1.2: Regional Ecosystems confirmed during field investigation
2 Methodology
2.1 Desktop methodology Proposed development areas have been projected on a range of maps provided by Santos. These maps include Regional Ecosystem (RE) Mapping (version 6.1 DERM), Environmentally Sensitive Areas (ESAs) mapping, watercourse mapping (DERM) and aerial photography. Where available ahead of time, these resources were reviewed to determine target areas for the field inspection. It is important to note that the RE classifications used in this report are based on the ‘Biodiversity Status’ of the vegetation and not the ‘ Vegetation Management Act 1999 (VM Act) status’ of the vegetation. Note that figures created for this report are based on the certified DERM mapping, and proposed amendments as required by Schedule D of the current Environmental Authority (February 2012, DERM Permit Number PEN100178208), which both illustrate the VM Act status.
2.2 Field methodology The proposed development area was assessed by an Aurecon ecologist (Grant Paterson) on 20 March 2012. These assessments were to determine the existing vegetation communities and habitat value of the proposed clearing within the development areas as well as to verify the RE mapping as produced by DERM. GIS environmental constraints layers (eg RE Mapping, ESA mapping etc) and high resolution aerial photography were uploaded onto a toughbook (C5 mobile clinical assistant CFT-001 – Motion computing), with an integrated GPS used to locate surveys areas. Handheld Garmin GPS units (GPS map 76) were also used during the field investigations. It should be noted that while efforts were made to ensure the GPS co-ordinates provided in this report are accurate, a margin of error approximately +/- 15 m is expected due to the limitations of the devices used and the recording environment. A buffer of 200 m either side of a centre line (centre line provided by Santos) was assessed for this flowline (refer to Figures 1.1 and 1.2 for flowline centre line). The ground-truthing of the proposed development area included undertaking detailed flora species surveys including sampling of unknown flora, and recording all incidental fauna observations. All species known to be of conservation significance (such as Endangered, Vulnerable, Near threatened or Type A species under the Nature Conservation Act 1992 [NC Act] or Critically endangered, Endangered, Vulnerable or Conservation dependent species under the Environment Protection and Biodiversity Conservation Act 1999 [EPBC Act]) were recorded using the toughbook or handheld GPS. A list of flora species observed within the proposed development area has been included in Appendix A. Incidental fauna observations are provided in the relevant section of this report.
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3 Ecological assessment
3.1 Arcadia Branch 1 Flowline
General The proposed development area is a flowline (Figures 1.1 and 1.2, yellow outlined area). The area assessed during these field investigations includes the flowline center line (determined using handheld GPS and as pegged on the ground) and a 200 m buffer either side of the center line. The proposed development is located adjacent to two (2) existing well pads and extends to the north of the well pads and then west along a small valley floor. The eastern portion of the development area (ie directly adjacent to the well pads) has been previously partially cleared for access tracks. These tracks are approximately 10m wide through otherwise intact remnant vegetation until it meets the cleared valley floor. Intact remnant vegetation communities are present to the south of the well pads and north of the access tracks. There is an area within the valley floor that is currently mapped as Endangered RE 11.9.5/11.9.5a (Figure 1.1) (Biodiversity status). This area is not correctly mapped, and is analogous with Of concern RE 11.3.25 (Biodiversity status) being dominated by Eucalyptus tereticornis and Corymbia species on a minor alluvial terrace. An area of remnant vegetation dominated by Acacia harpophylla (Brigalow) RE 11.9.5 is present in the proposed development area adjacent to the start of the flowline. This area is dissected by previous road, track and well pad clearing and is too small to be represented on an RE map at 1:100,000 scale. (Figure 1.2). This vegetation is considered characteristic of the threatened Brigalow ecological community, and may therefore be referable under the provisions of the EPBC Act. Only areas of Brigalow greater than 0.5ha are referable under the EPBC Act. The two areas identified at the existing well pad are 0.3ha and 0.6ha. The floristics and habitat value of this vegetation are discussed further in following sections. There are two (2) REs mapped within the proposed development area, RE 11.10.13a/11.10.1 (Both listed as No concern at present, Biodiversity Status). Field investigations confirmed that current RE mapping is incorrect, as discussed further in the following section. There is a mapped Category B ESA within the proposed development area associated with the currently mapped Endangered RE 11.9.5/11.9.5a, however, as discussed in the following section this mapping RE is incorrectly mapped. A ‘stream order 3’ watercourse is mapped adjacent and parallel to the flowline within the remnant area. The flowline also traverses a ‘stream order 1’ and a ‘stream order 2’ watercourse (which are tributaries of the ‘stream order 3 watercourse’) (refer Figures 1.1 and 1.2).
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Floristics General description The vegetation immediately adjacent to the existing well pads has been previously cleared (as a result of the existing development, and is likely to have been historically cleared for agricultural purposes). The area of vegetation surrounding the well pad in the south of the mapped RE 11.9.5/11.9.5a (Figure 1.1) is woody regrowth dominated by Acacia harpophylla (Brigalow) which forms a low, open shrub layer (height range 1-3 m, approximately 30% cover). The ground stratum associated with this regrowth is very sparse (approximately 15-20% cover) and is dominated by Bidens pilosa (Cobbler’s Pegs), Capparis lasiantha (Nipan), Pennisetum ciliare (Buffel grass) and Sclerolaena birchii (Galvanised Burr). The vegetation surrounding the existing well pad in the east contains vegetation analogous to RE 11.9.5 (refer Figure 1.2 for extent of RE 11.9.5). This vegetation is characterized by mature A. harpophylla in the canopy layer (height range of 10-20 m, dominant species). The canopy cover is approximately 30-40%, with other canopy and sub canopy species present including Brachychiton rupestris (Narrow-leaved Bottle Tree), Brachychiton australis (Broad-leaved Bottle Tree), Owenia acidula (Emu Apple), Casuarina cristata (Belah) and Geijera parviflora (Wilga). The ground cover species included a range of native grass and forb species (eg Sida acuta [Spiny-head Sida], Abutilon oxycarpum [Chinese Lantern], and Chloris spp. ), with very little weed cover. Shrub species tended towards semi-evergreen vine-thicket upslope, with representative species including Eremophila mitchellii (False Sandalwood), Carissa ovata (Currant Bush), Croton insularis (Silver Croton) and Petalostigma spp . This community is considered characteristic of the threatened Brigalow ecological community, and may therefore be referable under the provisions of the EPBC Act (refer to the pink polygons mapped on Figure 1.2). Only areas of Brigalow greater than 0.5ha are referable under the EPBC Act. The two areas near the existing well pad are 0.3ha and 0.6ha. It is also important to note that these two polygons would have been a single community prior to the clearing for the track leading to the well pad. Vegetation on the side slopes contains regions of vegetation that are analogous to RE 11.10.8 (refer Figure 1.2 for these regions). The canopy cover is approximately 70%, with the dominant canopy and sub canopy species including Acacia harpophylla , B. rupestris , B. australis , O. acidula , G. parviflora . This community is considered characteristic of the threatened Semi-evergreen vine thicket (SEVT) ecological community, and will therefore be referable under the provisions of the EPBC Act if clearing is to occur in these regions (refer to RE 11.10.8 polygons mapped on Figure 1.2). Regional Ecosystem The vegetation communities observed on the valley floor and on the side slopes both within and adjacent to the proposed development area are not consistent with the DERM RE Mapping. Currently the area mapped as RE 11.9.5/11.9.5a on the valley floor (associated with the stream order 3 watercourse) is analogous with RE 11.3.25. Some regions currently mapped as either RE 11.10.13a/11.10.1 or RE 11.9.5 (a small polygon to the south of the development area) were confirmed to be RE 11.10.8 (SEVT). Field investigations and geology mapping (Department of Mines and Energy [DME] July 2008), indicate that the communities present within the proposed development area are: • RE 11.3.25 dominated by Eucalyptus tereticornis and Corymbia species on a minor alluvial terrace associated with the stream order 3 watercourse • RE 11.9.5 dominated by A. harpophylla adjacent to the existing well pad in the east of the development area • RE 11.10.8 on the side slopes where SEVT species dominate
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A description of these communities is provided in Table 3.1 below.
Table 3.1 Regional Ecosystem descriptions and Biodiversity Status (DERM 2011)
RE Type RE Description (DERM 2011) Biodiversity Status 11.3.25 Eucalyptus camaldulensis or E. Of concern tereticornis open-forest to woodland. Other tree species such as Casuarina cunninghamiana, E. coolabah, Melaleuca bracteata, Melaleuca viminalis, Livistona spp . (in north), Melaleuca spp . and Angophora floribunda are commonly present and may be locally dominant. 11.9.5 Open-forest dominated by Endangered Acacia harpophylla (Brigalow) and/or Casuarina cristata (Belah) (10-20m) or A. harpophylla with a semi- evergreen vine thicket understorey. Open-forest dominated by C. cristata is more common in southern parts of the bioregion. A prominent low tree or tall shrub layer dominated by species such as Geijera parviflora (Wilga) and Eremophila mitchellii (False Sandalwood), and often with semi-evergreen vine thicket species is often present. 11.10.8 Semi-evergreen vine thicket and Of concern microphyll rainforest. Occurs on medium to coarse-grained sediments that may be subject to local enrichment from adjacent rocks such as basalt as well as seepage
Conservation significant species and Type A restricted plants (NC Act) No species of conservation significance (ie endangered, vulnerable or near threatened [EVNT] species protected under the provisions of the NC Act and/or the EPBC Act) were recorded within or directly adjacent to the proposed development area. Type A restricted species were observed but not recorded during field surveys within the proposed development area. Brachychiton spp. are known to occur within the area, particularly in areas of SEVT or on wetter slopes. A species list for the proposed development area is provided in Appendix A.
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Habitat values Two (2) incidental fauna species were recorded within the proposed development area during field investigations: Wedge-tailed Eagle ( Aquila audax ) and Eastern Grey Kangaroo ( Macropus giganteus ). No conservation significant fauna species (ie species listed as EVNT under the provisions of the EPBC Act and/or the NC Act) were recorded during field investigations. The proposed development area contains a range of habitat features including: • Mature woody vegetation suitable for foraging, perching and shelter • Rocky outcrops and overhangs/caves • Fissured tree bark and leaf litter • Woody debris (ie fallen timber, including hollow-bearing logs) • Dense ground cover vegetation (ie grassy tussocks)
The mature vegetation on the lower and upper slopes, is both structurally and floristically diverse, and contains habitat features such as canopy cover, rocky outcrops and overhangs, large hollow logs, dense ground cover and fissured tree bark. This vegetation community is likely to provide habitat for a range of common avian, reptile, and mammalian fauna species. The habitat value of this area is considered to be high. The portion of the flowline situated on the short valley floor has been previously cleared as a result of the existing well pad, access tracks and for agricultural purposes (eg stock grazing), and is now dominated by shrubby regrowth A. harpophylla (approximately height range of 2.5-3.0 m), with remnant RE 11.3.25 along the minor alluvial terrace. Habitat features within this area include cover from the regrowth and remnant vegetation communities which may also provide perching and foraging habitat for avian species, as well as habitat associated with the watercourses within this area (ie bed and bank habitat). As a result, the habitat value of this area is considered to be moderate. Overall the habitat value of the proposed Arcadia Branch 1 Flowline is considered to be moderate to high.
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4 Conclusion
The proposed development area is located adjacent to existing well pads and access tracks. Intact remnant vegetation communities occur within and adjacent to the proposed development area, however the current RE Mapping is incorrect. Field investigations confirmed the extant RE communities within the area. An area of remnant vegetation dominated by Acacia harpophylla (Brigalow) extends into the proposed development area. This vegetation is considered characteristic of the threatened Brigalow ecological community under the EPBC Act. Vegetation analogous to the threatened Semi-evergreen vine thicket (SEVT) ecological community (ie RE 11.10.8) under the EPBC Act is located within and directly adjacent to the proposed development area. Three (3) mapped watercourses occur within or adjacent to the proposed development area – stream order 1, stream order 2 and stream order 3 watercourses. Type A restricted plant species were observed within the proposed development area but locations were not recorded during field surveys. Brachychiton spp. are known to occur within areas of SEVT and on wetter slopes. No species of conservation significance (ie endangered, vulnerable or near threatened [EVNT] species protected under the provisions of the NC Act and/or the EPBC Act) were recorded within or directly adjacent to the proposed development area.
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5 References
Eddie, C (2007) Field Guide to Trees and Shrubs of Eastern Queensland Oil and Gas Fields, First Edition, Santos Ltd, Adelaide. Regional Ecosystem Mapping, Version 6.1, Queensland Government Department of Environment and Resource Management (DERM).
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Appendix A Flora Species List
Family Name Scientific Name Common Name Notes
Apocynaceae Alstonia constricta Bitter Bark Apocynaceae Carissa ovata Currant Bush Apocynaceae Gomphocarpus physocarpus Balloon Cotton Bush Apocynaceae Parsonsia lanceolata Monkey Rope Apocynaceae Sarcostemma viminale Caustic Weed Araliaceae Astrotricha cordata Hare Plant Asteraceae Acanthospermum hispidum Star Burr Asteraceae Bidens pilosa Cobblers Pegs Asteraceae Calotis cuneifolia Purple Burr Daisy Asteraceae Calotis lappulacea Yellow Burr Daisy Asteraceae Calotis scabiosifolia Rough Daisy Burr Asteraceae Conyza bonariensis Fleabane Asteraceae Pterocaulon sphacelatum Apple Bush Bignoniaceae Pandorea pandorana Wonga Vine Cactaceae Opuntia stricta Prickly Pear LP Act Class 2 Weed Capparaceae Capparis loranthifolia Nipan, Wait a while Capparaceae Capparis mitchellii Bumble Fruit Casuarinaceae Allocasuarina luehmannii Bull Oak Celastraceae Elaeodendron australis Peach Leaf Chenopodiaceae Chenopodium album Fat Hen Chenopodiaceae Einadia hastens Saltbush Chenopodiaceae Maireana microphylla Small-leaf Bluebush Chenopodiaceae Sclerolaena birchii Galvanised Burr Ebenaceae Diospyros humilis Scrub Ebony Euphorbiaceae Croton insularis Silver Croton Fabaceae - Lysiphyllum carronii Queensland Ebony Caesalpinioideae Fabaceae - Crotalaria dissitiflora Grey Rattlepod Faboideae Fabaceae - Hovea planifolia Hovea Faboideae Fabaceae - Swainsona galegifolia Swainsona
xiii
Family Name Scientific Name Common Name Notes
Faboideae Fabaceae - Acacia harpophylla Brigalow Mimosoideae Fabaceae - Acacia shirleyi Lancewood Mimosoideae Fabaceae - Neptunia gracilis Native Sensitive Weed Mimosoideae Lamiaceae Spartothamnella juncea Native Broom Lomandraceae Lomandra multiflora Lomandra Malvaceae Abutilon oxycarpum Chinese Lantern Malvaceae Malvastrum americanum Spiny Malvastrum Malvaceae Sida acuta Spiny Head Sida Malvaceae Sida cordifolia Flannel Weed Meliaceae Owenia acidula Emu Apple Moraceae Ficus rubiginosa Moreton Bay Fig Myoporaceae Eremophila deserti Turkey Bush Myoporaceae Eremophila mitchellii False Sandalwood Myoporaceae Myoporum acuminatum Boobialla Myrtaceae Corymbia citriodora Lemon Scented Gum Myrtaceae Eucalyptus crebra Narrow Leaved Ironbark Myrtaceae Eucalyptus cloeziana Gympie Messmate Myrtaceae Eucalyptus decorticans Gum Topped Ironbark Myrtaceae Eucalyptus tereticornis Forest Red Gum Oleaceae Jasminum didymum subsp. Native Jasmine racemosum Orchidaceae Cymbidium canaliculatum Black Orchid NC Act Type A Species Passifloraceae Passiflora arizonica Passion flower Phormiaceae Dianella caerulea Blue Flax-lily Phyllanthaceae Breynia oblongifolia Breynia Picrodendraceae Petalostigma pachyphyllum Smooth Quinine Picrodendraceae Petalostigma pubescens Quinine Pittosporaceae Bursaria spinosa Prickly Pine Pittosporaceae Pittosporum spinescens Wallaby Apple
Family Name Scientific Name Common Name Notes
Poaceae Chloris divaricata Windmill Chloris Poaceae Chloris pectinata Comb Chloris Poaceae Cymbopogon refractus Barbwire Grass Poaceae Eragrostis brownii Browns Lovegrass Poaceae Panicum decompositum Hairy Panic Poaceae Panicum effusum Inquisitive Grass Poaceae Panicum simile Two-coloured Panic Poaceae Pennisetum ciliare Buffel Grass Poaceae Sporobolus creber Western Rat’s-tail Grass Poaceae Tragus australianus Burr Grass Rhamnaceae Alphitonia excelsa Red Ash Rhamnaceae Ventilago viminalis Vine Tree Rubiaceae Canthium oleifolium Hat stand, Wild Lemon Rutaceae Citrus glauca Lime bush Rutaceae Geijera parviflora Wilga Santalaceae Exocarpos cupressiformis Native Cherry Santalaceae Santalum lanceolatum Sandalwood Sapindaceae Alectryon diversifolius Scrub Boonaree Sapindaceae Atalaya hemiglauca Whitewood Sapindaceae Dodonaea heteromorpha Hopbush Solanaceae Solanum ellipticum Potato Bush Solanaceae Solanum stelligerum devil's needles Sterculiaceae Brachychiton australis Broad Leaf Bottle Tree NC Act Type A Species Sterculiaceae Brachychiton rupestris Narrow Leaved Bottle NC Act Type A Tree Species Thymelaeaceae Pimelea linifolia Slender Rice-flower Tiliacea Grewia latifolia Dysentery Plant Vitaceae Cissus opaca Native Grape
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