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

Revision details

Typist

Author

Verifier

0

25 March 2011

Draft for Client Review

VJB

VJB

GAP

1

18 April 2011

For Issue

VJB

VJB

GAP

2

1 June 2011

For Issue

VJB

VJB

JS

Approver

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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Map by: MooreNK

11.10.9

Date: 24/03/2011

°

A3 scale: 1:12,000

0

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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Compressor Site HCS-02 Ecological Investigation

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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Compressor Site HCS-02 Ecological Investigation

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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Compressor Site HCS-02 Ecological Investigation

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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