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S149 CERTIFICATE ATTACHMENT
Acid Sulfate Soils
What are Acid Sulfate Soils?
Acid sulfate soils (ASS) are natural soils that form in seawater or brackish water environments. These soils contain iron sulphides that are stable and do not cause a problem when waterlogged. However when they are exposed to air, after drainage or excavation, the soils rapidly form sulphuric acid.
This acid can leach into the surrounding area acidifying neighbouring drains, wetlands, creeks, estuaries and bays, causing severe environmental damage. It can affect industries such as fishing and tourism, and can impact on public and private infrastructure by causing serious damage to steel and concrete structures. Polluted water may also have health impacts.
Where do Acid Sulfate Soils occur?
ASS occur in low-lying coastal areas less than 5 metres above the high tide level.
In NSW ASS have been found on every coastal estuary and embayment.
Maps Indicating ASS
The NSW Government’s ASS planning maps show areas that may be affected by the presence of ASS. These maps identify 5 classes of land, with Class 1 being the highest risk of ASS.
According to the NSW ASS Maps, ASS occur in the following areas in Randwick City:
Class 1 – in Port Botany Class 2 – in Port Botany, Matraville and Phillip Bay. Class 3 - Nil in Randwick City. Class 4 – mostly in Coogee, Maroubra, Malabar, Matraville and Philip Bay. Class 5 – mostly in Coogee, Maroubra, Malabar and Matraville, Chifley, Philip Bay, Little Bay
and La Perouse. Areas affected by these ASS classes in Randwick City have also been identified on the Randwick Local Environmental Plan 2012 (RLEP) – Acid Sulfate Soils Map (refer to the RLEP Map for details).
What if I want to develop land identified as being Acid Sulfate Soil?
Acid sulfate soils are manageable.
Development proposals do, however, need to recognise and plan for any constraints that these soils are likely to pose for development.
The NSW ASS Manual and ASS Guidelines prepared by the State Government provide advice on best practice in planning, assessment and management of activities in areas containing acid sulfate soils. The Manual and Guidelines can be found on the NSW Planning and Environment website www.planning.nsw.gov.au
The Randwick Local Environmental Plan 2012 (RLEP) also contains provisions (Clause 6.1 – Acid Sulfate Soils) for development on land that is affected by ASS, in line with the NSW ASS Manual and Guidelines. The RLEP provisions aim to ensure that development does not disturb, expose or drain ASS and cause environmental damage.
The RLEP identify the types of work (in each ASS class) that are likely to present an environmental risk and require development consent. The RLEP further requires the submission of an ASS management plan (prepared in accordance with the ASS Manual) to the consent authority before development consent can be granted. However, development consent is not required if a preliminary assessment of the proposed works (prepared in accordance with the NSW ASS Manual) indicates that a management plan is not required.
The RLEP (including the RLEP Maps) can be viewed on the NSW Legislation website at
www.legislation.nsw.gov.au or Council’s website at www.randwick.nsw.gov.au
Further information can also be obtained from the NSW Office of Environment and Heritage website at www.environment.nsw.gov.au
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S149 CERTIFICATE ATTACHMENT
Acid Sulfate Soils
Enquires
If you have further enquires about the RLEP provisions on ASS, contact Council’s Strategic Planning Department on 9399 0992.
For enquires regarding the NSW ASS Manual and associated Guidelines, contact the NSW Planning and Environment on 9228 6333.
Last Updated, 22 August 2014
SHARKPOINT
MOLINEUXPOINT
MISTRALPOINT
BUMBORAHPOINT
GORDONS BAY
WEDDINGCAKE ISLAND
BUCHANPOINT
FRENCHMANSBAY
YARRAPOINT
LITTLE BAY
HENRYHEAD
BAREISLAND
TOM CADDYPOINT
DOLPHINSPOINT
CONGWONGBAY
BROTHERSON DOCK
LURLINE BAY
CAPEBANKS
COOGEE BAY
MAROUBRA BAY
CRUWEECOVE
BOORAPOINT
LONG BAY
CLOVELLY BAY
YARRA BAY
MAGICPOINT
TASMAN SEABOTANY BAY
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MAROUBRA
RANDWICK
MALABAR
MATRAVILLE
LITTLE BAY
COOGEEKENSINGTON
KINGSFORD
PORT BOTANY
LA PEROUSE
CHIFLEY
CLOVELLY
SOUTH COOGEE
PHILLIP BAY
RANDWICK CITY COUNCIL
THE COUNCIL OF THE CITY OF BOTANY BAY
COUNCIL OF THE CITY OF SYDNEY
WAVERLEY COUNCIL
SUTHERLAND SHIRE COUNCIL
RANDWICK CITY COUNCILAcid Sulphate Soils - in the Local Environmental Plan (LEP) 2012
Refer to the Three Ports SEPP for Acid Sulphate Soils Classes
I0 750 1,500 2,250 3,000375
Meters
Base data 14/06/2016Randwick City Council
ASS data from NSW Dept Planningand Environment 2012
Map produced by Randwick City Council,Spatial Services
Printed 30 August 2016
Works beyond 2m below natural ground surface. Works by which the watertable is likely to be lowered beyond 2m below natural ground surface.Works within 500m of adjacent Class 1,2,3 or 4 land, and are likely to lowerthe water table below 1m Australian Height Datum on the adjacent land.
Class 4
Class 5
LegendAcid Sulphate Soils
Class 1Works below natural ground surface. Works lowering the water tableClass 2
WorksAny works. Highest at risk of ASS
LGA! ! Suburb" " "
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DP 11235
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DP 786146
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DP 337497
DP 827747
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DP 784742
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DP 36
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SP 31287
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DP 18
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DP 16
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DP 13
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DP 247428
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DP 1126332
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DP 1126332
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DP 651291
DP 21
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DP 10112478
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DP 844752
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DP 16138
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DP 24257
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162
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DP 523747
DP 792857
DP 60
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DP 22
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DP 16138
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DP 57
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DP 577045
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DP 50
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DP 1008480
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DP 752015
4823
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DP 399540
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DP 31675
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DP 16138DP 401334
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DP 561545
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DP 15983
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DP 369668
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DP 8936
DP 97
34
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11
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DP 31519
DP 10
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DP 1034266
DP 28437
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DP 535477
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232
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DP 381584
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DP 217043
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DP 395195
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DP 973411
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DP 339002
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DP 97
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DP 97
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DP 752015
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DP 8313
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DP 323108
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DP 210902131
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DP 529119DP 54
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DP 41
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DP 79
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DP 207912
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DP 1109208
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DP 30954
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DP 16138
1
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DP 375985
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DP 52
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DP 74
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DP 54
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SP 71730
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DP 605742
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DP 81
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DP 54
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DP 21
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SP 21
154
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CDP 8528
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DP 62
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DP 53
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DP 95
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SP 53954
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DP 207202
93
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DP 515566
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DP 20
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SP 50377
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DP 208323
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DP 1068292
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DP 515366
DP 14025
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SP 4013
DP 16138
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DP 21
108
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DP 236131
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DP 658339
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DP 862915
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DP 752015
DP 9734
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91
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MOLINEUXPOINT
BUMBORAHPOINT
FRENCHMANSBAY
YARRAPOINT
BAREISLAND
CONGWONGBAY
BROTHERSON DOCK
YARRA BAY
BOTANY BAY
MATRAVILLE
PORT BOTANY
LA PEROUSE
CHIFLEY
PHILLIP BAY
RANDWICK CITY COUNCILAcid Sulphate Soils - Port Botany (Areas Subject to the Three Ports SEPP)
Refer to the Randwick LEP 2012 for Acid Sulphate Soils Classes
Port Botany
I0 750 1,500 2,250 3,000375
Meters
Base data 20/06/2016Randwick City Council
ASS data from NSW Dept Planningand Environment 2012
Map produced by Randwick City CouncilSpatial Services
Printed 30 August 2016
Works beyond 2m below natural ground surface. Works by which the watertable is likely to be lowered beyond 2m below natural ground surface.Works within 500m of adjacent Class 1,2,3 or 4 land, and are likely to lowerthe water table below 1m Australian Height Datum on the adjacent land.
Class 4
Class 5
LegendAcid Sulphate Soils
Class 1Works below natural ground surface. Works lowering the water tableClass 2
WorksAny works. Highest at risk of ASS
LGA Boundary" " "
