Compressor Site HCS-02 Ecological Investigation Roma Gas Fields Santos Ltd
Report ref: 221708/001 1 June 2011 Revision 2
Santos Document No: 0020-GLNG-4-1.3-0026 rev0
Document prepared by: Aurecon Australia Pty Ltd ABN 54 005 139 873 Level 1, Tennyson House 9 Tennyson Street Mackay Queensland 4740 Australia T: +61 7 4977 5200 F: +61 7 4977 5201 E:
[email protected] W: aurecongroup.com
Document control Document ID: 20110322_Santos HCS02_Roma_Ecological Investigation_REV 2.doc Rev No
Date
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25 March 2011
Draft for Client Review
VJB
VJB
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1
18 April 2011
For Issue
VJB
VJB
GAP
2
1 June 2011
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VJB
JS
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A person using Aurecon documents or data accepts the risk of: a) b)
Using the documents or data in electronic form without requesting and checking them for accuracy against the original hard copy version. Using the documents or data for any purpose not agreed to in writing by Aurecon.
This document is solely for the purposes of an ecological assessment and does not provide any legal advice regarding development locations and/or activities.
Compressor Site HCS-02 Ecological Investigation
Contents 1.
Background
1
1.1
Project description
1
1.2
Purpose of report
1
2.
Methodology
3
2.1
Desktop methodology
3
2.2
Field methodology
3
3.
Ecological Assessment
4
3.1
Roma Permanent Workers Camp
4
3.2
Camp 1 Area
5
3.3
Camp 2 Area
7
3.4
Compressor Site
8
3.5
Powerlines and Roads
10
4.
Summary
11
Appendix A Botanical Species List
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Compressor Site HCS-02 Ecological Investigation
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 expansion of the Roma Gas Fields. The Roma Gas Fields are located approximately 25 km north-east of Roma in southern Queensland. The Roma Gas Fields occur in predominantly agricultural land which is primarily used for cattle grazing. This report is specific to the proposed development known as Compressor Site HCS-02 and the surrounding infrastructure associated with that development. The HCS-02 development is located on freehold lots 96 WV457 and 94 WV456. The Compressor Site HCS-02 includes the main compressor site complex including offices and brine ponds, the permanent workers camp, camp 1 (with laydown yard) and camp 2 (with contractor yard and sewerage treatment plant). These areas can be seen in Figure 1-1.
1.2
Purpose of report
The aim of this report is to provide an ecological assessment of the development site only and identify areas or species of notable ecological or conservation value. This report does not make any recommendations regarding the development in relation to any Santos environmental authorities or other approvals.
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A3 scale: 1:12,000
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Job No: 215648
270
540 m
Coordinate system: GDA 1994 MGA Zone 55
Version: 1
Santos Roma HCS-02
Figure 1-1: Aerial View of Footprint
Compressor Site HCS-02 Ecological Investigation
2.
Methodology
2.1
Desktop methodology
Areas of development have been projected on various maps as provided by Santos. These maps include Regional Ecosystem (RE) mapping, Environmentally Sensitive Areas (ESA) mapping, drainage mapping and aerial photography. Where available ahead of time, these resources were reviewed to determine areas of focus for the field inspection.
2.2
Field methodology
The proposed development sites were inspected by four (4) Aurecon ecologists (Jane Stark, Vanessa Boettcher, Sarah Stone and Cassandra Arkinstall) on 18 March 2011. The inspections aimed to assess the existing vegetation communities and habitat value of the proposed development areas as well as verifying the RE mapping. GIS layers of the proposed development locations and environmental constraints mapping (eg Regional Ecosystem Mapping, Ecologically Significant Area Mapping) and high resolution aerial photography were uploaded onto a toughbook (C5 mobile clinical assistant CFT-001 – Motion computing) with an integrated GPS to facilitate the detection of boundaries whilst traversing the site. Handheld Garmin GPS units (GPSmap 76) were also used in the inspection. The ground-truthing of these sites included undertaking detailed flora species observations including sampling of unknown flora. All flora 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 endangered, vulnerable or rare species under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) were recorded by GPS. Fauna observations were also recorded including any obvious habitat structures and fauna sightings. A list of flora species observed at the HCS-02 site has been included in Appendix A.
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Compressor Site HCS-02 Ecological Investigation
3.
Ecological Assessment
3.1
Roma Permanent Workers Camp
General The permanent workers camp is located entirely within non-remnant vegetation and is situated on extensively cleared agricultural land with only a few scattered mature trees. The area is not located in or within 500 metres of any areas mapped as ESA. An area of remnant ‘of concern’ vegetation occurs approximately 560 metres from the edge of the development footprint for the camp (see Figure 1-1). ‘Of concern’ regional ecosystems (RE’s) are classified as ‘Category C’ ESA The topography of the site is relatively flat and the nearest mapped watercourse occurs approximately 250 metres to the east.
Figure 3-1: Aerial view of Roma Permanent Workers Camp
Floristics and Habitat Value The area has been extensively cleared for grazing purposes and as such, only scattered mature vegetation is present. The ground layer is dense and has been dominated by Buffel grass (Pennisetum ciliare) and other exotic grass and forb species. No flora or fauna species of conservation significance under the NC Act or the EPBC Act were observed within the permanent camp footprint.
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Compressor Site HCS-02 Ecological Investigation
Figure 3-2: Permanent workers camp (photo taken from eastern side looking west)
The habitat value of the permanent camp is very low. This highly disturbed state of the site and intrusion of non-native species does not provide optimal foraging or nesting habitat for native fauna. No native fauna were seen at the permanent camp site however macropods were observed in the adjacent areas.
3.2
Camp 1 Area
General The camp 1 area includes the proposed accommodation area and a laydown yard. The area is mapped as non-remnant vegetation and is cleared agricultural land. The area has been cultivated previously and contour banks can be clearly seen on the aerial image (see Figure 3-3). The area is not located in or within 500 metres of any ESA’s. An area of ‘of concern’ remnant vegetation occurs approximately 750 metres north of the development footprint. ‘Of concern’ RE’s are classified as ‘Category C’ ESA. The topography of the site is relatively flat. A low order (stream order 1) watercourse occurs adjacent to the development area and the footprint crosses the watercourse in the eastern corner (see Figure 1-1 and Figure 3-3).
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Figure 3-3: Aerial view of Camp 1 Area
Floristics and Habitat Value The area has been extensively cleared for grazing and cultivation purposes and consequently very little woody vegetation occurs in the area. The ground layer is dominated by Buffel grass and other exotic grasses and forbs. A Narrow Leaved Bottle Tree (Brachychiton rupestris) and a Kurrajong (Brachychiton populneus) were also observed within the camp 1 area footprint. All Brachychiton species are Type A restricted plants under the NC Act. GPS locations for the species are outlined below: Table 3-1: Notable species within Camp 1 Area footprint
Species
Easting
Northing
(GDA 94, Zone 55)
(GDA 94, Zone 55)
Brachychiton rupestris
701204
7072921
Brachychiton populneus
701434
7072868
No other flora or fauna species of conservation significance under the NC Act or EPBC Act were observed within the development footprint for camp 1. The habitat value for the camp 1 area is relatively low in the cleared areas due to the high prevalence of non-native species and lack of woody vegetation cover. There was also very little woody ground debris due to historic cultivation. The habitat value of the watercourse is higher than that of the adjacent cleared land due to the presence of mature, riparian vegetation. The area is narrow in width at less than 50 metres across and therefore is unlikely to be a significant habitat area but could possibly provide foraging and potentially
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Compressor Site HCS-02 Ecological Investigation
nesting locations for native fauna. A Wedge Tailed Eagle (Aquila audax) was observed in the riparian vegetation. No raptor nests were observed in the vicinity of the Wedge Tailed Eagle sighting.
3.3
Camp 2 Area
General The camp 2 area includes the camp, contractor yard 2 and an associated sewerage treatment plant (STP) separate to the camp. The area is situated in cleared, cultivated agricultural land and is mapped entirely as non-remnant vegetation (see Figure 1-1 and Figure 3-4). The area is not located in or within 1km of any ESA’s. The topography of the site is relatively flat with a gentle decline to a watercourse on the north-eastern side of the camp. The northern corner of the development footprint occurs across the creek (see Figure 3-4).
STP
Figure 3-4: Aerial view of Camp 2 Area
A photograph of the site can be seen in Figure 3-5. The vegetation on the left hand side of the photograph is the creek line vegetation.
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Compressor Site HCS-02 Ecological Investigation
Figure 3-5: Permanent Workers Camp (taken from the north-western corner looking south east)
Floristics and Habitat Value The area is almost devoid of woody vegetation as the area has been cultivated in the past. The current ground cover is a dominated by Buffel grass (Pennisetum ciliare) and has a very low species diversity, most of which are non-native. No species of conservation significance under the NC Act or the EPBC Act were observed at the site. Habitat value is very low across most of the site within the cleared areas. The area is devoid of woody debris due to the lack of any mature vegetation and cultivation history. The adjacent creek line with fringing riparian vegetation is likely to provide foraging and potentially nesting habitat for a range of native fauna species although none were observed during the field inspection.
3.4
Compressor Site
General The compressor site is the largest area within the HCS-02 hub and comprises the compressor station, brine ponds, office complex and contractor yard 1. The area is mapped entirely as non-remnant vegetation and is mostly extensively cleared agricultural land. The area is not located in or within 500 metres of any ESA’s. A remnant ‘of concern’ regional ecosystem is situated approximately 780 metres north-east of the compressor site. ‘Of concern’ RE’s are classified as ‘Category C’ ESA. The topography of the site is relatively flat and is traversed by three low order watercourses (stream orders 1 and 2).
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Figure 3-6: Aerial view of Compressor Site
Floristics and Habitat Value The area has been extensively cleared for agricultural purposes and as such, has very little woody vegetation with only scattered emergent trees. The majority of the dense ground layer is dominated by Buffel grass although a high number of native grass species were also recorded, especially in the south-eastern portion of the compressor site. The south-eastern portion of the compressor site is analogous to a Blue Grass (Dichanthium sericeum) community. Analysis of high resolution aerial photography has indicated that the area has been ploughed and subject to previous vegetation clearing activities. In addition, analysis of the preclearing RE data indicates that the pre-clear vegetation type was RE11.10.11/11.10.9 (ie White Cypress Pine / Eucalypt woodland with a sparse understorey of native grasses), which has persisted along the south-eastern perimeter of the Compressor Site. Therefore, as the grassland has established as a direct result of anthropogenic factors, it is not suitable to be defined as an RE and therefore not eligible for protection. Two Narrow Leaved Bottle Trees (Brachychiton rupestris) were observed within the footprint of the compressor site. All Brachychiton species are Type A restricted plants under the NC Act. No other species of conservation significance under the NC Act or EPBC Act were observed within the compressor site footprint. The locations of the Bottle Trees are below and are illustrated in Figure 1-1. Table 3-2: Notable species within Compressor Site
Species
Easting
Northing
(GDA 94, Zone 55)
(GDA 94, Zone 55)
Brachychiton rupestris
701672
7072252
Brachychiton rupestris
702199
7071935
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Compressor Site HCS-02 Ecological Investigation
The western corner of the compressor site footprint contains a stream order 2 watercourse which is fringed with riparian vegetation. This vegetation consists mainly of Poplar Box (Eucalyptus populnea) with False Sandalwood (Eremophila mitchellii) and Wilga (Geijera parviflora). This area occurs up to 130 metres inside the development footprint. The habitat value of the compressor site is low within the cleared pasture area due to the lack of mature vegetation, intrusion of non-native species and highly disturbed state. The area has very little woody debris or other forms of shelter for small fauna. The habitat value of the watercourse which traverses the centre of the compressor site is the same as that of the surrounding cleared pasture land as there is no riparian vegetation and the watercourse is minor with no discernable channel structure. The two watercourses which occur along the edges of the compressor site footprint have a higher habitat value. These watercourses are larger, with a definable (albeit minor) channel and fringing vegetation. This area is likely to provide temporary foraging habitat for avian fauna and could possibly be utilised for nesting due to the presence of mature trees although it is not optimal breeding habitat. A Wedge Tailed Eagle (Aquila audax) was observed within the stream order 1 watercourse which occurs between the compressor site and the camp 1 area. No avian nesting sites were observed in the area.
3.5
Powerlines and Roads
The other areas visible on the footprint in Figure 1 which traverse the site between the above described areas are for powerlines and roads. The topography, floristics and habitat values of these areas are very similar to the development areas described above. The only area of significance is in the northern corner of the footprint (see Figure 1-1) where multiple Brachychiton species were growing in a corridor identified for a temporary access road. As stated above, all species of the genus Brachychiton are Type A restricted plants under the NC Act. Table 3-3 below outlines the locations of these Brachychiton species. Table 3-3: Type A species within disturbance area in northern corner of Lot 96 WV457
Species
Easting
Northing
(GDA 94, Zone 55)
(GDA 94, Zone 55)
Brachychiton rupestris
700910
7073115
Brachychiton rupestris
700936
7073149
Brachychiton rupestris
700945
7073147
Brachychiton rupestris
700945
7073137
Brachychiton rupestris
700962
7073139
Brachychiton rupestris
700978
7073147
Brachychiton rupestris
700961
7073117
Brachychiton rupestris
701037
7073172
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Compressor Site HCS-02 Ecological Investigation
4.
Summary
The HCS-02 hub has been located primarily in previously disturbed agricultural land and has an overall ecological value of low to moderate. The hub is situated entirely within mapped non-remnant vegetation which was verified during the inspection. Three low order watercourses traverse the site. These watercourses within the development footprint have fringing riparian vegetation which contains a moderate level of ecological and habitat value. Numerous Type A restricted plant species under the NC Act were observed within development areas. No other species of conservation significance under the NC Act or the EPBC Act were observed. Multiple native fauna were observed within the site, however no endangered, vulnerable or near threatened fauna under the NC Act or the EPBC Act were observed.
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Appendix A Botanical Species List
Compressor Site HCS-02 Ecological Investigation
Appendix A – Botanical Species observed within HCS-02 site. Abbreviations: NC Act Status: C = Least Concern Species; U = not listed (exotic species). EPBC Act Status: U = not listed. Species shaded in yellow are declared weeds under the provisions of the Land Protection (Pest and Stock Route Management) Act 2002.
Scientific name
Common Name
NCA
EPBC
Acacia decora
Pretty Wattle
C
U
Acacia excelsa
Iron wood
C
U
Acacia farnesiana
Mimosa
U
U
Acacia harpophylla
Brigalow
C
U
Alectryon diversifolius
Scrub Boonaree
C
U
Alectryon oleifolius
Boonaree
C
U
Allocasuarina luehmannii
Bull Oak
C
U
Alstonia constricta
Bitterbark
C
U
Alternanthera denticulata
Lesser Joyweed
C
U
Alternanthera pungens
Khaki Weed
U
U
Apophyllum anomalum
Warrior Bush
C
U
Aristida platychaeta
Curled Wiregrass
C
U
Aristida ramosa
Purple Wiregrass
C
U
Atriplex muelleri
Lagoon Saltbush
C
U
Bidens pilosa
Cobbler's Pegs
U
U
Bothriochloa bladhii
Forest Bluegrass
C
U
Bothriochloa erianthoides
Satintop Grass
C
U
Bothriochloa ewartiana
Desert Bluegrass
C
U
Brachychiton populneus
Kurrajong
C – Type A
U
Brachychiton rupestris
Narrow Leaved Botte Tree
C – Type A
Bracteantha Bracteantha
Yellow Everlasting Daisy
C
U
Callitris glaucophylla
White Cypress Pine
C
U
Calotis cuneifolia
Burr Daisy
C
U
Calotis hispidula
Bogan Flea
C
U
Notes
exotic
exotic
exotic
Locations illustrated in Figure 1-1 Locations illustrated in Figure 1-1
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Compressor Site HCS-02 Ecological Investigation
Scientific name
Common Name
NCA
EPBC
Calotis lappulacea
Yellow Burr Daisy
C
U
Calotis scabiosifolia
Burr Daisy
C
U
Capparis lasiantha
Nipan
C
U
Carissa ovata
Currantbush
C
U
Casuarina cunninghamiana
River She-Oak
C
U
Cheilanthes sieberi
Mulga Fern
C
U
Chenopodium carinatum
Keeled Goosefoot
U
U
Chloris divaricata
Slender Chloris
C
U
Chloris gayana
Rhodes Grass
U
U
Chloris pectinata
Comb Chloris
C
U
Chloris ventricosa
Tall Chloris
C
U
Chloris virgata
Feathertop Rhodes Grass
U
U
Chrysocephalum apiculatum
Yellow Buttons
C
U
Cirsium vulgare
Spear Thistle
U
U
Citrus glauca
Lime bush
C
U
Convolvulus erubescens
Australian Bindweed
C
U
Conyza bonariensis
Fleabane
U
U
Crotalaria dissitiflora
Grey Rattlepod
C
U
Cymbopogon refractus
Barbed-Wire Grass
C
U
Cyperus rigidellus
Flat Sedge
C
U
Dactyloctenium radulans
Button Grass
C
U
Desmodium varians
Slender Tick Trefoil
C
U
Dichanthium sericeum
Queensland Bluegrass
C
U
Digitaria ammophila
Silky Umbrella Grass
C
U
Dodonaea viscosa
Sticky Hop Bush
C
U
Echinochloa colona
Awnless Barnyard Grass
U
U
Emex australis
Goathead Burr
U
U
Enteropogon acicularis
Curly Windmill Grass
C
U
Eragrostis brownii
Brown's Lovegrass
C
U
Eragrostis cilianensis
Stink Grass
U
U
Eragrostis parviflora
Weeping Lovegrass
C
U
Eragrostis sororia
Forest Lovegrass
C
U
Eremophila debilis
Winter Apple
C
U
Eremophila longifolia
Berrigan
C
U
Eremophila mitchellii
False Sandalwood
C
U
Notes
exotic
exotic
exotic
exotic
exotic
exotic
exotic
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Compressor Site HCS-02 Ecological Investigation
Scientific name
Common Name
NCA
EPBC
Notes
Eucalyptus melanophloia
Silver-Leaf Ironbark
C
U
Eucalyptus populnea
Poplar Box
C
U
Eulalia aurea
Silky Browntop
C
U
Euphorbia drummondii
Spurge Weed
C
U
Evolvulus alsinoides
Tropical Speedwell
C
U
Fimbristylis dichotoma
Common Fringe-Rush
C
U
Flaveria australasica
Speedy Weed
C
U
Geijera parviflora
Wilga
C
U
Glycine tabacina
Glycine Pea
C
U
Gomphocarpus physocarpus
Balloon Cottonbush
U
U
exotic
Gomphrena celosioides
Gomphrena Weed
U
U
exotic
Goodenia glabra
Smooth Goodenia
C
U
Grevillea striata
Beefwood
C
U
Grewia latifolia
Dysentery Plant
C
U
Heteropogon contortus
Black Speargrass
C
U
Lysiphyllum carronii
Ebony Tree
C
U
Malva parviflora
Small-Flowered Mallow
U
U
exotic
Malvastrum americanum
Spiked Malvastrum
U
U
exotic
Maytenus cunninghamii
Yellow Berry Bush
C
U
Megathyrsus maximus
Green Panic Grass
U
U
Melaleuca viminalis
Weeping Bottlebrush
C
U
Neptunia gracilis
Native Sensitive Plant
C
U
Opuntia stricta
Prickly Pear
U
U
Owenia acidula
Emu Apple
C
U
Oxalis corniculata
Wood Sorrel
C
U
Panicum decompositum
Native Millet
C
U
Panicum effusum
Hairy Panic
C
U
Paspalum dilatatum
Paspalum
U
U
exotic
Pennisetum ciliare
Buffel Grass
U
U
exotic
Podolepis jaceoides
Showy Copper-Wire Daisy
C
U
Portulaca oleracea
Pigweed
C
U
Psoralea tenax
Emu Foot
C
U
Psydrax oleifolia
Myrtle Tree
C
U
Pterocaulon sphacelatum
Apple bush
C
U
exotic
class 2 weed, exotic
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Common Name
Scientific name
NCA
EPBC
Salsola kali
Soft Roly-Poly
C
U
Sclerolaena birchii
Galvanised Burr
C
U
Sida fibulifera
Pin Sida
C
U
Sida platycalyx
Lifesaver Burr
C
U
Sida rhombifolia
Paddy's Lucerne
U
U
Sida rohlenae
Shrub Sida
C
U
Sida subspicata
Spiked Sida
C
U
Solanum americanum
Smooth Nightshade
U
U
Solanum ellipticum
Potato Bush
C
U
Solanum esuriale
Quean
C
U
Sonchus oleraceus
Common Sowthistle
U
U
Spartothamnella puberula
NA
C
U
Sporobolus creber
Western Rats-Tail Grass
C
U
Stipa verticillata
Slender Bamboo Grass
C
U
Swainsona galegifolia
Smooth Darling Pea
C
U
Swainsona microphylla
Small-Leaved Darling Pea
C
U
Themeda triandra
Kangaroo Grass
C
U
Tragus australianus
Small Burr Grass
C
U
Trianthema triquetra
Red Spinach
C
U
Tridax procumbens
Tridax Daisy
U
U
Verbena officinalis
Common Verbena
C
U
Verbena tenuisecta
Mayne's Curse
U
U
Wahlenbergia gracilis
Sprawling Bluebell
C
U
Wahlenbergia queenslandica
Large Bluebell
C
U
Xanthium occidentale
Noogoora Burr
U
U
Notes
exotic
exotic
exotic
exotic
exotic
exotic
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