CSBP ALBANY FERTILISERS DEPOT STORMWATER POND RELINING

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CSBP ALBANY FERTILISERS DEPOT STORMWATER POND RELINING

LICENCE L8669/2012/1 WORKS APPROVAL SUPPORTING DOCUMENTATION

VERSION 3

20 OCTOBER 2020

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Supporting Documentation Stormwater Pond Relining CSBP Albany

i CONTENTS

1. SUMMARY ... 1

1.1 THE PROPONENT ... 2

1.2 ENVIRONMENTAL APPROVALS ... 2

1.3 OTHER LEGAL REQUIREMENTS ... 2

2. PROJECT DESCRIPTION ... 3

2.1 LOCATION ... 3

2.2 BACKGROUND ... 3

2.3 SCOPE OF PROJECT ... 4

2.4 COST OF THE PROJECT ... 5

2.5 TIMING OF THE PROJECT ... 5

3. ENVIRONMENTAL IMPACTS AND MANAGEMENT ... 6

3.1 STORMWATER ... 6

3.2 SOLID WASTE DISPOSAL ... 7

3.3 DANGEROUS GOODS AND OTHER STORED CHEMICALS ... 7

3.4 GROUNDWATER ... 7

3.5 AIR QUALITY ... 7

3.6 BIODIVERSITY – FLORA AND FAUNA ... 8

3.7 LOCAL COMMUNITY, NOISE, ODOUR, LIGHT, DUST ... 8

3.8 WATER USE ... 8

4. REFERENCES ... 8

ATTACHMENT 1 – CSBP ALBANY ENVIRONMENTAL LICENCE L8669/2012/1 ATTACHMENT 2 – EXISTING LINED POND AND PROPOSED RELINING DRAWING

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1 1. SUMMARY

This document has been prepared in support of CSBP Limited’s (CSBP) works approval application to reline the existing lined stormwater pond at Albany.

CSBP operates a fertiliser distribution facility at Albany. The current activities on site include receivals, storage and despatch of fertilisers.

Stormwater from operating areas at the site collects in lined drains and flows to a lined pond.

This water is then pumped to a water treatment plant to reduce concentrations of phosphorus and ammonia before it is discharged to the Munster Hill Drain.

CSBP proposes to reline the pond as part of a preventative maintenance program. The proposed work will involve installing a new HDPE liner over the existing liner and creating a low point to position the existing pumps to maximise pump out of the pond. The relining is planned for late summer to early autumn (February-March 2021) to reduce the risk and/or volume of stormwater inflow during the works and to target low groundwater levels.

An incremental increase in working storage volume is expected to be achieved by positioning the pumps in a low point so that the pond can be drained to a lower level. The ability to use this additional capacity will be subject to the levels in the adjacent unlined pond.

CSBP is seeking exemptions from the following licence conditions during the project in the event that stormwater needs to be directed to the unlined pond to protect the works and in the event that extreme rain results in discharge via the SW4 weir.

2(i) The licensee shall ensure that potentially contaminated stormwater and wastewater from operations is captured within the lined drainage system and directed to the lined pond.

2(ii) The licensee shall ensure that potentially contaminated stormwater and wastewater from the lined pond is directed to the water treatment plant except during overflow events caused by rainfall.

5 (i) The licensee shall not cause or allow point source emissions to the Munster Hill Drain that do not meet the limits listed in Table 1.

It is not expected that the unlined pond will overflow to the SW4 discharge weir during the project. In the event that this occurs CSBP proposes to take daily spot samples for parameters listed in Table 2 of the licence

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2 1.1 THE PROPONENT

The proponent for the Project is:

CSBP Limited

Kwinana Beach Road Kwinana WA 6167

The key contact for the proposed project is:

Alison White Telephone: 0419 904 608

Senior Environmental Advisor Email: alison.white@csbp.com.au CSBP Limited

PO Box 345 Kwinana WA 6966

1.2 ENVIRONMENTAL APPROVALS Part V Environmental Protection Act 1986

CSBP’s Albany site has been assessed as a prescribed premise category 33 under Schedule 1 of the EP Act. CSBP Albany currently operates under EP Act Licence No.

L8669/2012/1 (Attachment 1).

The proposed modification may trigger the requirement for a works approval under Section 53(1) of the EP Act; Subject to this Act, the occupier of any prescribed premises who, if to do so may cause an emission, or alter the nature or volume of the waste, noise, odour or electromagnetic radiation emitted, from the prescribed premises — (b) constructs, installs or alters any equipment on the prescribed premises for — (i) the storage, handling, transport or treatment of waste prior to, and for the purpose of, the discharge of waste into the environment; commits an offence unless he does so (f) in accordance with — (i) a works approval.

1.3 OTHER LEGAL REQUIREMENTS

The proposed works do not trigger any other legal requirements related to the legislation or local laws is listed below:

 Aboriginal Heritage Act 1980;

 Agriculture and Related Resources Protection Act 1976;

 Conservation and Land Management Act 1984;

 Contaminated Sites Act 2003;

 Dangerous Goods Safety Act 2004;

 Dangerous Goods Safety (Storage and Handling of Non-Explosives) Regulations 2007

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 Dangerous Goods Safety (Road and Rail Transport of Non-Explosives) Regulations 2007

 Dangerous Goods Safety (Security Risk Substances) Regulations 2007

 Dangerous Goods Safety (General) Regulations 2007

 Environmental Protection Act 1986 (as amended);

 Environmental Protection Regulations 1987

 Environmental Protection (Noise) Regulations 1997

 Contaminated Sites Act 2003

 Contaminated Sites Regulations 2006

 Health Act 1911

 Local Government Act 1995;

 Main Roads Act 1930;

 Occupational Health and Safety Act 1984 (and Regulations); and

 Rights in Water and Irrigation Act 1914.

2. PROJECT DESCRIPTION 2.1 LOCATION

The CSBP Albany depot address is 198 Hanrahan Road Albany, within the locality of Mount Elphinstone. Lot 2 is approximately 120 hectare and is located 3km west of the Albany Town centre and 1km north of the Princess Royal Harbour.

The proposed works will occur within the existing operational area at the lined pond depicted in Attachment 2 of the environmental licence.

2.2 BACKGROUND

CSBP Limited operates a fertiliser distribution facility at Albany. The current activities on site include receivals, storage and despatch of fertilisers.

Stormwater from operating areas at the site collects in lined drains and flows to a lined pond (6,300m³). This water is then pumped to a water treatment plant to reduce concentrations of phosphorus and ammonia before it is discharged via a v-notch weir to the Munster Hill Drain.

CSBP plans to reline the pond as part of a preventative maintenance program. The lined pond was installed in 1991 and is lined with PVC (approximately 0.76mm thick). Wood &

Grieve Engineers inspected the lined pond in 2014 and noted that general warrantee periods for similar liners are in the order of 20-25 years, however there is no reason a covered protected liner, as is the case here could not function effectively for 50 years or longer (WGE, 2014). The liner is not visible as it is covered with approximately 400mm of sand and gravel to protect it.

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There is no evidence that the lined pond is leaking. Regular visual inspections and annual level drop checks have not identified seepage or fluid loss.

The lined pond has an effective depth of 1160mm (base to overflow) with storage volume of 6,300m³. The lined pond is designed to contain a 1 in 1 (Annual Recurrence Interval) ARI 24 hour storm event.

Water in the lined pond is pumped to a Water Treatment Plant prior to discharge which operates at approximately 1,300m³/day but during intense rainfall events the lined pond can overflow to the adjacent unlined pond. When capacity is restored in the lined pond the overflow water is pumped back into the lined pond and treated prior to discharge. If capacity cannot be restored in the lined pond due to continuing rain the unlined pond can overflow and discharges offsite via the SW4 weir. Monitoring during overflow events in 2013 and 2017 indicated no environmental impact (CSBP, Annual Environmental Reports 2014 &

2018).

As part of the proposed relining CSBP investigated the option to enlarge the existing lined pond to reduce the likelihood and volume of overflows.

Environmental consultants (Aurora Environmental) were commissioned to drill and sample soils to assess the potential impact of disturbing Acid Sulfate Soil (ASS). The results indicate that soil excavation and dewatering required to extend the existing lined pond will be problematic. Natural soils will require a high liming rate and best practice would be to avoid disturbing these materials. Deeper soils which will be exposed during dewatering would also require treatment and given the location of the site (on the hydraulic gradient boundary of the Site) there is limited scope for contingency if appropriate management is not achieved.

Given the finding of the ASS investigations and the low risk of environmental impact from overflow events CSBP proposes to re-line the existing pond with minimal disturbance to the current liner.

CSBP propose to re-position the pumps to a low point which will allow the water level to be drained to a lower level which will provide some additional storage capacity by allowing lower operating levels to be achieved. The ability to use this additional capacity will be subject to the levels in the adjacent unlined pond (Refer to information related to Works to relocate the discharge weir and raise the Unlined Pond overflow level).

2.3 SCOPE OF PROJECT

The proposed works to reline the existing pond is depicted in Attachment 2.

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CSBP proposes to install the liner over the existing liner to minimise soil disturbance and avoid the requirement for dewatering. Though the liner is being installed over the existing liner it is expected that the operating volume of the pond will increase from approximately 4,500m³up to 5,500m³, subject to the water level in the adjacent unlined pond. The additional volume will be achieved by creating a low point where the submersible pumps can be positioned so the pond can be drained to a lower level. The increase in operating volume will be dependent on the volume of ballast that can be removed which will be determined during earthworks.

The existing inlet concrete channel will remain in place.

The proposal includes the following works:

1. Remove gravel ballast layer to expose existing sand ballast;

2. Inspect and prepare the sand ballast so it is suitable sub-grade for the liner;

3. Excavate an anchor trench for the liner along the embankment;

4. Install the new HDPE (1.5mm) liner;

5. Anchor liner in the trench; and 6. Install ballast over new liner.

2.4 COST OF THE PROJECT

The cost of the work is estimated at $350,000 (including GST) based on a consultant’s estimates for the scope of work outlined in 2.3. Approximate breakdown of these costs are as follows:

Item Cost Estimate ($)

Engineering, Supervision & Admin 85,000

Earthworks and civil 60,000

Liner Supply and Installation 135,000

Contingencies 70,000

TOTAL 350,000

2.5 TIMING OF THE PROJECT

The relining is planned for late summer to early autumn (February-March 2021) to reduce the risk and/or volume of stormwater inflow during the works and to target low groundwater

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levels. In the event that groundwater levels are unusually high or heavy rain is forecast the project may need to be delayed until 2022.

The re-lining project is expected to take 4-6 weeks to implement.

3. ENVIRONMENTAL IMPACTS AND MANAGEMENT 3.1 STORMWATER

The new liner will reduce the risk of stormwater leaking from the lined pond to groundwater.

Re-positioning the pumps will provide the opportunity to pump the dam to a lower level, subject to other operating conditions. If the operating volume in the lined pond can be increased this will reduce the likelihood and volume of overflow. This assists in reducing the load of nutrient discharge from the site by increasing the volume of water that can be treated prior to discharge.

The proposed works will be scheduled for summer to reduce the risk of rain causing overflow offsite. There is also limited fertiliser despatch at this time of year so there is a low risk of high nutrient load in stormwater.

In the event there is rain during the works CSBP proposes to:

1) Block the discharge point into the lined pond (from the lined drains) and use the concrete settling chamber and lined drains to store the water; and

2) If rains continue and there is insufficient capacity in the lined drains, pump the stormwater to the unlined pond. When the lined pond is back online water diverted to the unlined pond will be pumped to the lined pond for treatment prior to discharge.

3) It is not expected that the unlined pond will overflow to the SW4 discharge weir during the project. In the event that there is significant rain and this occurs CSBP proposes to take daily spot samples for parameters listed in Table 2 of the licence.

CSBP is seeking exemptions from the following licence conditions during the project in the event that stormwater needs to be directed to the unlined pond to protect the works and in the event that extreme rain results in discharge via the SW4 weir.

2(i) The licensee shall ensure that potentially contaminated stormwater and wastewater from operations is captured within the lined drainage system and directed to the lined pond.

2(ii) The licensee shall ensure that potentially contaminated stormwater and wastewater from the lined pond is directed to the water treatment plant except during overflow events caused by rainfall.

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5 (i) The licensee shall not cause or allow point source emissions to the Munster Hill Drain that do not meet the limits listed in Table 1.

The licence also requires to advise the DWER CEO in writing when the pond is offline (72 hours notice) or sludge is being removed (14 days notice). CSBP will provide advice to the DWER when the pond is offline (project commences). It is expected that the pond will be offline and exemption from the licence conditions outlined above will be required for 4-6 weeks.

3.2 SOLID WASTE DISPOSAL

Sediments from the base of the pond are routinely cleaned out and tested for re-use or appropriate disposal as part of the pond maintenance. Any excavated sediments and ballast will be managed as part of this normal process.

Any minor general waste as a result of the works will be incorporated into normal waste management practices at the site.

3.3 DANGEROUS GOODS AND OTHER STORED CHEMICALS

There will be no change in use or storage of chemicals or dangerous goods at the premises.

There will be minor quantities of fuel and oil storage on site for earthmoving equipment.

3.4 GROUNDWATER

Groundwater beneath the site is in an unconfined shallow superficial aquifer. Historical information about groundwater elevation for bores within the Albany Depot identify an overall west to south-west flow direction for shallow groundwater. The gradient is influenced to the east by Mount Melville, to the south by Mount Elphinstone, and to the west by the Munster Hill drain. There is typically between 1m and 2m of groundwater level variation annually (Aurora, 2014).

Due to the potential risks associated with disturbing Acid Sulfate Soil (ASS) the proposed works will not involve dewatering or excavation into underlying natural soils.

Groundwater monitoring in bore AW14 adjacent to the lined pond will assist in scheduling the work when groundwater levels are seasonally low (typically March).

The proposed works include ballast over liner to protect it from physical damage as well as underlying groundwater pressure.

3.5 AIR QUALITY

There will be no construction activities or operational changes that will affect air quality.

Earthworks are minimal so not expected to generate dust beyond the immediate work area.

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8 3.6 BIODIVERSITY – FLORA AND FAUNA

There will be no clearing of native vegetation or disturbance to native fauna. Occasionally tortoises are observed in the lined pond. When the pond is drained if there are any tortoises they will be relocated to the adjacent Munster Hill Drain.

3.7 LOCAL COMMUNITY, NOISE, ODOUR, LIGHT, DUST

The proposed modifications are within the plant operating area and will not be visible or create noise, odour, dust or light spill that might impact on the community.

The nearest neighbour (light industry) is located approximately 170m to the south east and the nearest residential neighbor is located approximately 500m from the proposed works which we be carried out during working weekdays (0700-1900 hours). Some works may be required on Saturdays (0700-1900 hours).

Given the limited noise and dust generated by the proposed work, day time works and the distance to sensitive receptors there will be no impact on the surrounding community.

3.8 WATER USE

There will be no significant change in water use for the site for the works or ongoing operations.

4. REFERENCES

CSBP Albany - Drainage System Assessment Capacity and Condition, Wood & Grieve Engineers, 17 September 2014 (Version 4).

CSBP (2018) CSBP Albany Annual Environmental Report 2016/2017, CSBP 2018.

CSBP (2014) CSBP Albany Annual Environmental Report 2013/2014, CSBP 2014.

Aurora Environmental (2014) Groundwater Quality, CSBP Albany Depot, 198 Hanrahan Road, Mount Elphinstone. Prepared for CSBP/WesCEF, Report No. AA2013/022 Version 1, 11 July 2014.

Aurora Environmental (2016) Sampling Analysis and Quality Plan, CSBP Albany Depot, Area D, Mount Elphinstone, WA. Prepared for CSBP/WesCEF, Report No. AA2015/014 Version 4, 13 July 2016.

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Attachment 1

CSBP Albany Environmental Licence L8669

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The Atrium, 168 St Georges Terrace, Perth WA 6000 Phone (08) 6467 5000 Fax (08) 6467 5562 Postal Address: Locked Bag 33, Cloisters Square, Perth WA 6850 www.der.wa.gov.au Our ref: CEO4450/16

Enquiries: Caron Goodbourn Phone: 97246135 Email: info@der.wa.gov.au

Ms Stephanie Felstead Environmental Superintendant

Wesfarmers Chemicals, Energy & Fertilisers PO Box 345

KWINANA WA 6966

Via email: stephanie.felstead@csbp.com.au

Dear Ms Felstead

SECTION 59B(9) OF THE ENVIRONMENTAL PROTECTION ACT 1986 – NOTICE OF AMENDMENT TO LICENCES

Further to the notice of proposed amendment sent to you on 10 January 2017, please find enclosed the Amendment Notice issued in accordance with section 59B(9) of the Environmental Protection Act 1986 (EP Act) for the following licences:

L6107/1967/17 CSBP Limited Kwinana L6110/1990/13 Australian Gold Reagents L6306/1989/11 Wesfarmers LPG

L8662/2012/1 CSBP Limited Esperance Depot

L8669/2012/1 CSBP Limited Albany Fertiliser Distribution Facility L8841/2014/1 CSBP Limited Geraldton Depot

If you are concerned about or object to any aspect of the amendment, you may lodge an appeal with the Minister for the Environment within 21 days from the date on which this notice is received. The appeal form can be obtained from the Office of the Appeals Convenor (www.appealsconvenor.wa.gov.au or phone 6467 5190). Members of the public may also appeal the amendments. The Office of the Appeals Convenor will contact you if any appeals are received.

If you have any queries, please contact Manager Licensing Caron Goodbourn on phone 9724 6135.

Yours sincerely

Caron Goodbourn

A/MANAGER LICENSING – INDUSTRY REGULATION (PROCESS INDUSTRIES) LICENSING AND APPROVALS

Officer delegated under Section 20 of the Environmental Protection Act 1986 6 February 2017

Att: Amendment Notice

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Licence Number Various (refer Column 1 of Table 1)

Licence Holder Various (refer Column 2 of Table 1)

ACNs Various (refer Column 4 of Table 1)

Registered business address

Various (refer Column 6 of Table 1)

Date of amendment 6 February 2017

Premises Various (refer Column 3 of Table 1)

Amendment

The Chief Executive Officer (CEO) of the Department of Environment Regulation (DER) has amended the licences in Table 1 in accordance with section 59 of the Environmental Protection Act 1986 as set out in this Amendment Notice. This Amendment Notice constitutes written notice of the amendment in accordance with section 59B(9) of the EP Act and follows.

Caron Goodbourn

A/Manager Licensing (Process Industries)

an officer delegated under section 20 of the Environmental Protection Act 1986 (WA)

Amendment Notice

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Amendment Notice

This notice is issued under section 59 of the Environmental Protection Act 1986 (EP Act) to amend the licences issued under the EP Act for a prescribed premises as set out below. This notice of amendment is given under section 59B(9) of the EP Act.

Amendment Description

On 10 November 2016, Wesfarmers Chemical, Energy & Fertilisers Limited notified DER of a new registered business address for all Wesfarmer subsidiaries. An amendment was requested to all licences held by Wesfarmer Chemicals, Energy &

Fertilisers businesses to include the new registered business address.

Decision

The licences listed in Column 1 of Table 1 have been amended to include the new registered business address in accordance with Table 1 below.

Amendment

1. The registered business address of the licences listed in Column 1 of Table 1 is amended from the address in Column 5 of Table 1 to the new address in

Column 6 of Table 1.

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Table 1 – Registered Business Address Amendments

Column 1 Column 2 Column 3 Column 4 Column 5 Column 6

Licence Number Licence Holder Name

Premises Name ACN Previous

Registered

Business Address

New Registered Business Address

L6107/1967/17 CSBP Limited CSBP Limited Kwinana

008 668 371 Wesfarmers House 40 The Esplanade PERTH WA 6000

Level 14, Tower 2 Brookfield Place 123 St Georges Tce PERTH WA 6000 L6110/1990/13 Australian Gold

Reagents Pty Ltd

Australian Gold Reagents

009 140 121 Wesfarmers House 40 The Esplanade PERTH WA 6000

Level 14, Tower 2 Brookfield Place 123 St Georges Tce PERTH WA 6000 L6306/1989/11 Wesfarmers LPG

Pty Ltd

Wesfarmers LPG 009 214 831 Wesfarmers House 40 The Esplanade PERTH WA 6000

Level 14, Tower 2 Brookfield Place 123 St Georges Tce PERTH WA 6000 L8662/2012/1 CSBP Limited CSBP Limited

Esperance Depot

008 668 371 Wesfarmers House 40 The Esplanade PERTH WA 6000

Level 14, Tower 2 Brookfield Place 123 St Georges Tce PERTH WA 6000 L8669/2012/1 CSBP Limited CSBP Limited

Albany Fertiliser Distribution Facility

008 668 371 Wesfarmers House 40 The Esplanade PERTH WA 6000

Level 14, Tower 2 Brookfield Place 123 St Georges Tce PERTH WA 6000 L8841/2014/1 CSBP Limited CSBP Limited

Geraldton Depot

008 668 371 Wesfarmers House 40 The Esplanade PERTH WA 6000

Level 14, Tower 2

Brookfield Place

123 St Georges Tce

PERTH WA 6000

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ATTACHMENT 2 – EXISTING LINED POND AND PROPOSED RELINING

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