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i Bushfire Management Statement for the construction of two leachate tanks at 950 Ballarto Road, Cranbourne, VIC 3997. Report prepared for SBI Cranbourne Quarries April 2013 1

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Bushfire Management Statement: 950 Ballarto Road, Cranbourne

1

i

Bushfire Management Statement

for the construction of two leachate tanks at 950 Ballarto Road, Cranbourne, VIC 3997.

Report prepared for

SBI Cranbourne Quarries

April 2013

1

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Bushfire Management Statement for 950 Ballarto Road, Cranbourne, VIC 3997. Report prepared by Terramatrix on behalf of SBI Cranbourne Quarries. Terramatrix project code: BMO-2013-1 SBI Cranbourne Quarries-Cranbourne Terramatrix Pty. Ltd. ACN 129 163 373 ABN 44 129 163 373 PO Box 1391, Collingwood VIC 3066 P: 03 9417 2626 www.terramatrix.com.au Approvals  

Accountability Name Signature

Bushfire analysis Catherine Stephenson

Report compilation Catherine Stephenson

Approval for release Hamish Allan, Manager – Bushfire Planning and Design

Version  Control  

Version Date completed Comments Undertaken by / Distribution

1.1 24th April 2013 Analysis, maps and report writing CS

1.1 25th April 2013 Peer review and approval for release HA

1.2 26th April 2013 Draft Bushfire Management Statement sent Client and File

Copyright Unless otherwise agreed in writing, this report is the intellectual property of Terramatrix. The report is designed to be used exclusively by the person that commissioned it. Permission must be sought prior to the reproduction of any portion of this document and every effort made to ensure proper referencing of this document. Disclaimer This report may be of assistance to you and has been made with careful consideration and with the best information available to Terramatrix at the time of writing. Before relying on information in this report, users should carefully evaluate the accuracy, completeness and relevance of the information provided for their purposes. Terramatrix Pty Ltd, its directors and employees do not guarantee that it is without flaw or omission of any kind or is wholly appropriate for your particular purposes and therefore disclaim all liability for any error, loss or other consequence that may arise from you relying on any information in this report.

   

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TABLE OF CONTENTS 1. INTRODUCTION .............................................................................................................. 4  2. LOCALITY AND SITE DESCRIPTION ........................................................................ 5  

2.1 THE SITE ........................................................................................................................... 5  2.1.1 Site shape, size and slope .........................................................................................................5  2.1.2 Existing use and development on the site ...............................................................................5  2.1.3 Existing access arrangements .................................................................................................5  

2.2 EXISTING VEGETATION ................................................................................................... 7  2.3 EXISTING TOPOGRAPHY .................................................................................................. 9  2.4 LOCALITY AND SURROUNDING LAND ........................................................................... 9  

2.4.1 Existing use and development on adjacent sites .....................................................................9  2.4.2 Access to infrastructure and existing road networks .............................................................9  2.4.3 Surrounding landscape ...........................................................................................................9  

3. PLANNING AND BUILDING CONTROLS .............................................................. 11  3.1 ZONING .......................................................................................................................... 11  3.2 OVERLAYS ...................................................................................................................... 11  

3.2.1 Bushfire Management Overlay (BMO) ................................................................................11  3.2.2 42.01 Environmental Significance Overlay - Schedule 3 Royal Botanic Gardens, Cranbourne Environs (ESO3) .......................................................................................................12  

3.3 BUSHFIRE PRONE AREA (BPA) ..................................................................................... 12  4. BUSHFIRE RISK ASSESSMENT .................................................................................. 14  

4.1 BUSHFIRE SCENARIOS .................................................................................................... 14  4.2 MECHANISMS OF BUSHFIRE ATTACK ........................................................................... 15  

4.2.1 Ember attack ..........................................................................................................................16  4.2.2 Flame contact and radiant heat .............................................................................................16  

5. BMO COMPLIANCE ....................................................................................................... 17  5.1 LOCATION, LAYOUT AND SITING OBJECTIVES: BF3 AND BF4 ..................................... 19  5.2 BUSHFIRE PROTECTION MEASURES OBJECTIVE: BF5 .................................................... 20  5.3 BUILDINGS AND DEFENDABLE SPACE OBJECTIVES: BF7, BF9 AND BF10 ................... 21  

7. CONCLUSION ................................................................................................................. 24  8. REFERENCES .................................................................................................................... 25  APPENDIX 1. WATER SUPPLY REQUIREMENTS ...................................................... 26  APPENDIX 2. ACCESS REQUIREMENTS ..................................................................... 28  

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1. Introduction SBI Cranbourne Quarries currently operate a rock quarry at 950 Ballarto Road, Cranbourne, which is proposed to be developed into a landfill for solid, inert waste. This Bushfire Management Statement has been prepared to enable SBI Cranbourne Quarries to respond to the requirements of Clause 44.06 Bushfire Management Overlay (known from this point on as Clause 44.06), and associated Clause 52.47 Bushfire Protection: Planning Requirements (known from this point on as Clause 52.47) for the construction of two leachate storage tanks that will be built as part of the landfill development. The leachate storage tanks will contain contaminated water leached from the landfill. Each tank’s volume will be approximately 2 ML. This Bushfire Management Statement contains two main components:

• A locality and site description, which is used to identify the existing conditions of the site and surrounds in accordance with the application requirements of Clause 44.06-2; and

• A Bushfire Site Assessment, which calculates the defendable space and construction requirements and shows how the development can meet the relevant objectives, standards, mandatory standards and decision guidelines of Clause 52.47.

This Bushfire Management Statement has been prepared to accompany the planning permit application for the proposed development.  

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2. Locality and site description This section describes the property’s location, use and physical environment. 2.1 The site Address: 950 Ballarto Road, Cranbourne (see Map 1).

Municipality: Casey Shire

Directory reference: Melways reference 133 E9

Assessment date: 28th August 2012

Assessors: Catherine Stephenson – Senior Analyst, Bushfire Planning and Design John Eastwood – Technical Officer, Bushfire Planning and Design

2.1.1 Site shape, size and slope Site shape: Irregular

Site area: 41.4 hectares

Site slope: Apart from the quarry pit, the land is generally flat with gently topography.

2.1.2 Existing use and development on the site Current use of the site: Rock quarry Buildings and works located on the site: Rock quarrying machines, dwelling,

gatehouse, sheds, weight bridge  2.1.3 Existing access arrangements Main vehicle access point: Ballarto Road, Cranbourne Construction of roads currently on site: Unsealed roads

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Map 1 – Site location and landscape context.

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2.2 Existing vegetation A Bushfire Site Assessment has identified ‘classified vegetation’ within 150 metres of the development (CFA, 2011). Three types of classified vegetation have been identified (see Map 2). Classified vegetation – ‘Forest’ Forest is found to the north, east and west of the leachate storage tanks. This vegetation comprises eucalypts approximately 20 metres tall with a mix of indigenous and non-indigenous shrubs up to 6 metres tall (see Figure 1). This vegetation is at least 65 metres from the leachate storage tanks.

Figure 1 – ‘Forest’ vegetation to the north, east and west of the leachate storage tanks. Refer to Map 2 for the location of this photo. Classified vegetation – ‘Scrub’ A small patch of Scrub exists to the north of the leachate storage tanks within the 150 metre Bushfire Site Assessment Zone, however this is negligible given that Forest vegetation separates it form the leachate storage tanks (see Figure 2 and Map 2).

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Figure 2 – ‘Scrub’ vegetation to the north of the leachate storage tanks. Refer to Map 2 for the location of this photo. Classified vegetation – ‘Grassland’ A mixture of grass and bracken exists under the power line easement 100 metres to the west of the leachate storage tanks (see Figure 3 and Map 2).

Figure 3 – ‘Grassland’ vegetation to the west of the leachate storage tanks under the power line easement. Refer to Map 2 for the location of this photo.

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2.3 Existing topography Topography within the 150 metre assessment zone under classified vegetation has also been assessed. Given that the land is generally flat, as illustrated by the large distances between 10 metre contour lines on Map 2, the topography will not significantly influence bushfire behaviour. 2.4 Locality and surrounding land This section discusses the existing land uses within 250 metres of the site (as per Clause 44.06-2). 2.4.1 Existing use and development on adjacent sites There is an existing paddock to the north of 950 Ballarto Road, however the northern section of this paddock has been redeveloped into a housing estate. A farm containing large sheds adjoins the property along the northern section of its southeastern boundary, while the Royal Botanic Gardens, Cranbourne adjoins the property along its southeastern boundary, which contains shrubby and low forest vegetation. A golf course adjoins the southwestern boundary, while a large farming paddock is found to the northwest (see Maps 1 and 2). 2.4.2 Access to infrastructure and existing road networks The property is accessed via Ballarto Road. Numerous gravel roads are also found on the property, which access the various areas of the quarry operations (see Map 2). 2.4.3 Surrounding landscape There is a mosaic of housing, golf courses and farms to the north, south and west of 950 Ballarto Road beyond the adjacent properties. The Royal Botanic Gardens, Cranbourne, extend for approximately 2 kilometres to the east.

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Map 2 - Classified vegetation within 150 metres and existing land uses within 250 metres of the leachate storage tanks at 950 Ballarto Road, Cranbourne.  

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3. Planning and building controls 950 Ballarto Road is affected by a number of planning and building controls, which are explained below. Zoning: Cl. 35.07 Farming Zone – Schedule 2 (FZ2)

Schedule to the Farming Zone – Schedule 2

Overlays: Cl. 44.06 Bushfire Management Overlay (BMO) Cl. 42.01 Environmental Significance Overlay – Schedule 3:

Royal Botanic Gardens, Cranbourne Environs

Bushfire Prone Area: Yes 3.1 Zoning Farming Zone – Schedule 2 (FZ2) The site is within FZ2 (Casey Planning Scheme, 2008), the purpose of which includes encouraging productive agricultural enterprises while still considering sustainable land management practices, biodiversity management and infrastructure requirements. While a refuse disposal facility is currently prohibited in the Farming Zone, a planning scheme amendment including a site-specific clause and associated incorporated document that allows for this development is proposed. 3.2 Overlays Two overlays affect the development: 3.2.1 Bushfire Management Overlay (BMO) The BMO is used to guide the development of land in areas of high bushfire hazard. It requires consideration of the location, design and construction of development and the implementation of bushfire protection measures. BMO areas are shown on planning scheme maps as either BMO or WMO (Wildfire Management Overlay). The BMO mapping is based on the bushfire hazard and applied to areas of extreme fuel loads where there is a potential for extreme bushfire behaviour such as a crown fire and extreme ember attack and radiant heat. The BMO takes into account vegetation, weather characteristics and slope. The purposes of the BMO include:

• “To assist to strengthen community resilience to bushfire. • To identify areas where the bushfire hazard requires specified bushfire protection

measures for subdivision and buildings and works to be implemented. • To ensure that the location, design and construction of development considers the

need to implement bushfire protection measures. • To ensure development does not proceed unless the risk to life and property from

bushfire can be reduced to an acceptable level” (Casey Planning Scheme, 2011)

The BMO was introduced on 18th November 2011 to replace the WMO, and currently occupies the same spatial area as the WMO. New BMO mapping is being progressively introduced to local planning schemes (Department of Planning and Community Development (DPCD), 2011).

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Specific objectives, standards, mandatory standards and decision guidelines are set out in Clause 52.47 of all planning schemes and these inform decisions and requirements under the BMO. The matters to be considered include:

• Location, layout and siting; • Building construction and defendable space; • Water supply and access; and • Implementation of bushfire protection measures.

3.2.2 42.01 Environmental Significance Overlay - Schedule 3 Royal Botanic Gardens, Cranbourne Environs (ESO3) ESO3 has been applied to a number of properties that adjoin the Cranbourne Botanic Gardens (Casey Planning Scheme, 2006). It has been created to ensure that any development on private property in close proximity to the Garden’s boundaries does not impact on the biological or amenity values of those within the Gardens. The proposed development is located 300 metres from the Royal Botanic Gardens, Cranbourne’s northwestern boundary and the construction of the leachate storage tanks will not impact on the biological or amenity values of those within the Gardens. 3.3 Bushfire Prone Area (BPA) The site is within a designated Bushfire Prone Area (BPA). BPAs are those areas subject to or likely to be subject to bushfires, as determined by the Minister for Planning. New BPAs came into effect from 8th September 2011. Those areas of highest bushfire risk within the BPA are designated as BMO areas. The Building Regulations 2006, through application of the Building Code of Australia, apply bushfire protection standards for building works in designated BPAs. A minimum construction standard applies to all new buildings in a BPA. Buildings must be constructed to a minimum Bushfire Attack Level (BAL) of 12.5, or higher as determined by a site assessment or planning scheme requirement. A BAL is a means of measuring the severity of a building’s potential exposure to ember attack, radiant heat and direct flame contact. There are six BALs that form part of AS 3959-2009 Construction of buildings in bushfire prone areas (known from this point on AS 3959-2009) (Standards Australia, 2009). The level of risk and expected fire outcomes at each BAL are explained in Table 1.

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Table 1 – Bushfire Attack Levels (BALs) explained (derived from AS 3959-2009, Standards, Australia, 2009).

Bushfire Attack Level (BAL)

Risk Level Construction elements are

expected to be exposed to…

Comment

BAL-Low

VERY LOW: There is insufficient risk to warrant any specific construction requirements but there is still some risk.

No specification.

At 4kW/m2 pain to humans after 10 to 20 seconds exposure. Critical conditions at 10kW/m2 and pain to humans after 3 seconds. Considered to be life threatening within 1 minute exposure in protective equipment.

BAL-12.5

LOW: There is risk of ember attack.

A radiant heat flux not greater than 12.5 kW/m2

At 12.5kW/m2 standard float glass could fail and some timbers can ignite with prolonged exposure and piloted ignition.

BAL-19

MODERATE: There is a risk of ember attack and burning debris ignited by windborne embers and a likelihood of exposure to radiant heat.

A radiant heat flux not greater than 19 kW/m2

At 19kW/m2 screened float glass could fail.

BAL-29

HIGH: There is an increased risk of ember attack and burning debris ignited by windborne embers and a likelihood of exposure to an increased level of radiant heat.

A radiant heat flux not greater than 29 kW/m2

At 29kW/m2 ignition of most timbers without piloted ignition after 3 minutes exposure. Toughened glass could fail.

BAL-40

VERY HIGH: There is a much increased risk of ember attack and burning debris ignited by windborne embers, a likelihood of exposure to a high level of radiant heat and some likelihood of direct exposure to flames from the fire front.

A radiant heat flux not greater than 40 kW/m2

At 42kW/m2 ignition of cotton fabric after 5 seconds exposure (without piloted ignition).

BAL- FZ (i.e. Flame Zone)

EXTREME: There is an extremely high risk of ember attack and a likelihood of exposure to an extreme level of radiant heat and direct exposure to flames from the fire front.

A radiant heat flux greater than 40 kW/m2

At 45kW/m2 ignition of timber in 20 seconds (without piloted ignition).

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4. Bushfire risk assessment The bushfire risk to 950 Ballarto Road, Cranbourne has been assessed at a landscape scale by identifying how possible bushfire scenarios and the mechanisms of a bushfire, may impact on the proposed development. 4.1 Bushfire scenarios The potential impact of a bushfire on the development was assessed in relation to likely bushfire scenarios. These scenarios define credible directions of approach of fire, given the nature of the site, the surrounding vegetation and topography (see Table 2 and Figure 4). Table 2 – Possible bushfire scenarios for 950 Ballarto Road, Cranborune.

Fire approach scenario Description

1. Approach from the north, north-west or west

A fire is most likely to approach from the north, northwest or west due to prevailing winds being from these directions on extreme fire weather days. However the short fire runs resulting from the limited vegetation, numerous sealed and unsealed roads, and residential development within close proximity of the site means that a fire from this direction should be manageable. Additionally, there is a separation distance of approximately 65 metres between Forest vegetation and the leachate storage tanks. Ember attack is likely, with firebrand material conducive to long distance spotting potentially reaching the leachate storage tanks.

2. Approach from the southwest

A fire approaching from the south or southwest would be the result of a southwesterly wind typically associated with a cool change. The non-vegetated areas and low threat vegetation associated with the public and quarry roads, quarry pit and golf course in this direction will as in scenario one, limit the fire’s rate of spread and potential impact on the development. In fact it is considered unlikely that a fire will impact on the leachate storage tanks if it was to approach from the southwest, as the quarry pit and unsealed road are located between the tanks and vegetation.

3. Approach from the east

Whilst the largest expanse of Forest vegetation is to the east, winds from this direction are not typically associated with high bushfire risk weather.

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Figure 4 – Bushfire scenarios for 950 Ballarto Road, Cranbourne (Yellow property boundary). The scenario numbers refer to the scenarios in Table 2. © 2013 Google & © 2013 Whereis® Sensis Pty Ltd & © 2013 Cnes/Spot Image 4.2 Mechanisms of bushfire attack The mechanisms of bushfire attack on a building can be a combination of sparks and embers and/or direct flame contact and/or radiant heat (see Figure 5). Strong winds may also cause structural damage to a building, making ignition by embers easier.

Figure 5 – Mechanisms of bushfire attack on a building.

Scenario 1

Scenario 2

Scenario 3

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4.2.1 Ember attack Typically, ember attack can be expected to commence before a fire front arrives, peak with the passage of the fire front and then continue for a number of hours after the fire front has passed as nearby trees continue to smoulder and shed burning bark. It is important to note that many buildings are lost in the period after the fire front has passed, however as the leachate storage tanks will be made out of non-combustible materials, the risk of embers impacting on the tanks is minimal. 4.2.2 Flame contact and radiant heat Arguably it is flame contact or radiant heat that poses the greatest threat to the integrity of the leachate storage tanks. These mechanisms can result in rapid involvement of the entire asset. Due to the approximately 65 metres of bare rock and soil between the leachate storage tanks and Forest vegetation, the leachate storage tanks will not be significantly impacted by flames or a high level of radiant heat. The Bushfire Site Assessment process is used to determine how far away from unmanaged vegetation a building would need to be to receive less than a certain level of radiant heat (e.g. a building constructed to BAL-19 has been designed to withstand a radiant heat flux of 19 kW/m2). A BAL construction rating is not required for the leachate storage tanks, nor is the need for defendable space applicable, as these leachate storage tanks are not a form of accommodation.  

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5. BMO compliance This section identifies how the proposed development meets the requirements of Clause 52.47. This clause in the Victoria Planning Provisions contains objectives, standards, mandatory standards and decision guidelines for preparing and assessing applications under the BMO.

• Objectives describe the desired outcome to be achieved in a completed development;

• Standards specify the requirements to meet the objectives. A standard should normally be met but if an alternative design solution can be shown to meet the objective it may be considered;

• Mandatory Standards must be met and alternative design solution must not be considered; and

• Decision Guidelines specify matters that the responsible authority must consider in assessing and deciding upon an application.

Table 3 summarises the applicability and compliance of the development with Clause 52.47, and subsequent tables demonstrate how the development complies with those objectives, standards and mandatory standards that are applicable.

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Table 3 – Standards relevant to this proposal under Clause 52.47 Bushfire Protection Planning Requirements.

Standards under Clause 52.47 Applicable standards

Ability of the development

to comply Subdivision objectives

BF1 - Subdivision No n/a

BF2 - Subdivision requirements for residential lots No n/a

Location, layout and siting objectives BF3 - Location Yes Yes BF4 - Siting and layout Yes Yes

Bushfire protection measures objective BF5 - Bushfire protection measures Yes Yes

Buildings and defendable space objectives

BF6.1 - Defendable space for dwellings and dependent person’s units No n/a

BF6.2 - Defendable space for dwellings and dependent person’s units No n/a

BF6.3 - Defendable space for dwellings and dependent person’s units No n/a

BF7.1 - Defendable space for industry, office and retail premises Yes Yes

BF7.2 - Defendable space for industry, office and retail premises Yes Yes

BF8.1 - Defendable space and construction for other occupied buildings No n/a

BF8.2 - Defendable space and construction for other occupied buildings No n/a

BF9 - Defendable space location Yes Yes BF10 - Water supply and access Yes Yes

 

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5.1 Location, layout and siting objectives: BF3 and BF4 Table 4 – Clause 52.47-3 and the justification for meeting it. 52.47-3 Location objective

• To ensure that development is located and sited so that it does not increase the risk to life, property and community infrastructure from bushfire.

Standard BF3

• Development should avoid locations where the risk to life, property and community infrastructure from bushfire cannot be reduced to an acceptable level through bushfire protection measures.

(✓) Meets objective (✓) Meets standard () Meets standard in part () Does not comply Justification The leachate tanks will not be in a position where there is an unacceptable risk to life, property and community infrastructure, as they will be located in the middle of a large non-vegetated area. They will be 125 metres away from the closest habitable buildings, being the dwelling and gatehouse to the northeast (see Map 3). The leachate tanks will be constructed out of steel and should therefore not add to the bushfire risk in their own right. Similarly, the neighbouring groundwater storage tank will also be made out of steel (see Map 3). The leachate and groundwater pumping management areas will house the pumps used to draw liquids into the tanks and also be made of non-combustible materials. Table 5 – Clause 52.47-4 and the justification for meeting it. 52.47-4 Siting and layout objective

• To ensure that the siting and layout of development reduces the risk to life, property and community infrastructure from bushfire to an acceptable level and prioritises the protection of human life.

Standard BF4 The siting and layout of development should:

• Minimise the bushfire risk having regard to slope, access, aspect, orientation and vegetation.

• Avoid or minimise the removal of vegetation. • Site new buildings as far from the bushfire hazard as practicable. • Minimise the need for long access and egress routes through areas of bushfire

hazard and locate habitable buildings as close as practicable to property entrances.

• Provide safe access and egress for emergency services. (✓) Meets objective (✓) Meets standard () Meets standard in part () Does not comply

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Justification No vegetation will need to be removed to construct the leachate tanks and no additional vegetation will be planted in this area. The existing road network within the property will continue to be used in its transition to a landfill for solid, inert waste. This consists of the landfill haul road, which begins at the site entrance and will transport landfill into the pit (see Map 3). There will also be a perimeter access road, which will circle the pit and pass by the leachate tanks (see Map 3). The distance from the leachate tanks to Ballarto Road will be 250 metres. There is adequate access and egress for emergency services, with ample opportunities for passing. 5.2 Bushfire protection measures objective: BF5 Table 6 – Clause 52.47-5 and the justification for meeting it. 52.47-5 Bushfire protection measures objective

• To ensure that bushfire protection measures required by this clause are implemented and maintained in perpetuity.

Mandatory Standard BF5

• Bushfire protection measures proposed by the applicant and required by this clause can be practically implemented and maintained in conjunction with the ongoing use of the land.

• The location, type and layout of proposed landscaping, revegetation or any native vegetation offset does not increase the bushfire risk to the proposed development or the adjacent area.

• Bushfire protection measures required by the standards in this clause are implemented regardless of other bushfire protection measures that may be provided, including private bushfire shelters, community shelters and the presence of other places of last resort.

(✓) Meets objective (✓) Meets mandatory standard Justification The bushfire protection measures proposed, including defendable space/setback distances from vegetation, and an adequate water supply and access for emergency services, are achievable and are explained in Table 9 below.

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5.3 Buildings and defendable space objectives: BF7, BF9 and BF10 Table 7 - Clause 52.47-7 and the justification for meeting it. 52.47-7 Defendable space for industry, office and retail premises objective

• To ensure that the construction of a building has regard to the nature of the bushfire hazard of the site and the necessary area of defendable space is provided. This objective only applies to an application to construct or extend a building in association with the following uses:

o Industry; o Office; o Retail premises.

Mandatory Standard BF7.1 Defendable space and construction requirements must be calculated:

• In accordance with the requirements of the Building Act 1993 but substituting Table 1 to this clause for Table 2.4.2 in AS3959 Construction of buildings in bushfire prone areas (Standards Australia, 2009), or

• Using an alternative method to the satisfaction of the relevant fire authority. Justification As the leachate tanks are not a form of accommodation or a habitable building they will not be built to a BAL construction standard and it is considered that they require minimal defendable space. They will be sited within an area of the existing quarry that is void of contiguous vegetation for at least 65 metres (see Map 3). It is proposed that a minimum area of 40 metres around them be maintained to at least outer zone defendable space standard. This is equivalent to a BAL-29 in relation to Forest vegetation on flat/upslope land in Table 1 of Clause 52.47. (✓) Meets objective (✓) Meets mandatory standard Standard BF7.2 Buildings should:

• Be provided with defendable space and construction requirements for a BAL-29 or less as specified in Table 1, or

• Be provided with defendable space and construction requirements for a BAL-40 as specified in Table 1 if it can be demonstrated that defendable space for a BAL-29 cannot be achieved due to significant siting constraints.

This does not apply where an alternative method in accordance with BF7.1 is used to calculate defendable space and construction requirements where the dwelling or dependent person’s unit should:

• Be provided with construction requirements for a BAL-29 or less and appropriate defendable space.

• Be provided with construction requirements for a BAL-40 and appropriate defendable space if it can be demonstrated that defendable space for a BAL-29 cannot be achieved due to significant siting constraints.

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Justification Refer to the mandatory standard BF7.1 above. (✓) Meets objective (✓) Meets standard () Not applicable Table 8 - Clause 52.47-9 and the justification for meeting it. 52.47-9 Defendable space location objective

• To ensure defendable space is contained on the land to which the planning permit will apply.

Mandatory Standard BF9 The defendable space required by Mandatory Standards BF6.1, BF7.1 and BF8.1 is located wholly within the title boundaries of the land to which the permit will apply. This standard does not apply where:

• The defendable space incorporates land: o that does not require management to minimise the spread and intensity

of bushfire, or o that will be managed to minimise the spread and intensity of bushfire

consistent with the purpose of providing defendable space. • There is reasonable assurance that the adjoining land will remain or continue

to be managed in the same condition. (✓) Meets objective (✓) Meets mandatory standard Justification The defendable space is located wholly within the property boundary. Table 9 - Clause 52.47-10 and the justification for meeting it. 52.47-10 Water supply and access objectives

• To ensure the provision, and adequate supply of water to facilitate fire fighting and property protection during and after the passage of a bushfire.

• To ensure that safe access is provided for emergency and other vehicles at

all times. Mandatory Standard BF10

• All buildings and works must provide a static water supply and access to this water supply that meets the requirements of the relevant fire authority.

• All buildings and works must provide access and egress arrangements that meet the requirements of the relevant fire authority.

(✓) Meets objective (✓) Meets mandatory standard Justification The groundwater storage tank is next to the leachate storage tanks and will have the capacity to hold approximately 3-4 ML of clean water, however the final volume has yet to be determined. The groundwater storage tank will be fitted with CFA coupling so that at least 40,000 L is available for fire authorities at all times (CFA, 2012) (see Appendix 1). The tank will be constructed from steel. Access to the leachate and groundwater tanks will meet CFA (2012) standards, which are summarised in Appendix 2.

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Map 3 – Detailed plan for two leachate tanks at 950 Ballarto Road, Cranbourne.

 

Vegetation  management    

                   Outer  zone  (40m)  

Contours  (10m)  

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7. Conclusion SBI Cranbourne Quarries are converting the rock quarry at 950 Ballarto Road into a landfill for solid, inert waste. As part of the development, two leachate tanks will be constructed on the site. These are classified as ‘buildings and works’ under the BMO and are required to comply with the defendable space, water supply and access requirements of this overlay. A large (approximately 3 ML) groundwater storage tank will be constructed as part of the development. This will sit next to the leachate storage tanks and will contain CFA coupling. The groundwater storage tanks will hold a minimum volume of 40,000 L for use in emergency situations. The leachate and groundwater storage tanks will be easily accessed via a gravel road, which will comply with CFA requirements. Although the leachate storage tanks will not meet a BAL construction standard they will be provided with 40 metres of outer zone defendable space equivalent to a BAL-29 in relation to Forest vegetation on flat or upslope land. They will also be made out of steel. Please Note: Options for the physical preparation of buildings and the surrounding environment discussed in this document do not guarantee survival of the buildings or the occupants. The client is strongly encouraged to develop and practice a bushfire survival plan. Information and assistance including a template for a Bushfire Survival Plan is provided as part of the ‘Fire Ready Kit’ available through the CFA website at http://www.cfa.vic.gov.au/plan-prepare/fire-ready-kit/ or through your local CFA Regional office.

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8. References Casey Planning Scheme (2006). Schedule 3 to the Environmental Significance Overlay,

Casey Shire Council, Victoria Planning Provisions Clause 42.01s3. Available at http://planningschemes.dpcd.vic.gov.au/casey/ordinance/42_01s03_case.pdf

Casey Planning Scheme (2008). Schedule 2 to the Farming Zone, Casey Shire Council,

Victoria Planning Provisions Clause 35.07s2. Available at http://planningschemes.dpcd.vic.gov.au/casey/ordinance/35_07s02_case.pdf

Casey Planning Scheme (2011). Bushfire Management Overlay, Casey Shire Council, Victoria Planning Provisions Clause 44.06. Available at http://planningschemes.dpcd.vic.gov.au/aavpp/44_06.pdf

CFA (2011). FSG LUP 0003 Assessing vegetation in a bushfire management overlay

(BMO). Country Fire Authority, Burwood East, Victoria. Available at http://www.cfa.vic.gov.au

CFA (2012). Planning for Bushfire, Victoria. Guidelines for meeting Victoria’s bushfire

planning requirements. Country Fire Authority, Burwood East, Victoria. Available at http://www.cfa.vic.gov.au

DPCD (2011). Advisory Note 40: Amendment VC83 – Bushfire protection. Bushfire

planning provisions. Department of Planning and Community Development, Melbourne, Victoria. Available at http://www.dpcd.vic.gov.au/__data/assets/pdf_file/0008/86489/AN40-Amendment-VC83-Bushfire-planning-provisions.pdf

Standards Australia (2009). AS 3959-2009 Construction of Buildings in Bushfire Prone

Areas, Standards Australia, North Sydney, New South Wales.  

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Appendix 1. Water supply requirements A dedicated static water supply is to be installed on the property and needs to comply with the following applicable requirements (CFA, 2012):

• A capacity of not less than specified in Table 10 below that is maintained solely for fire fighting purposes.

• The water supply must be stored in an above ground water tank constructed of concrete, steel or corrugated iron.

• The water supply must be located within 60 metres of the outer edge of the building (including any obstructions).

• The water supply outlet/s must be fixed to the water tank. • All pipework between the water supply and the outlet/s must be 64 mm

(minimum) nominal bore. • All fixed above-ground water pipelines and fittings must be of non-

corrodible and non-combustible materials. • Where CFA access and coupling are specified by Table 10 below the water

supply must: o Be located so that fire brigade vehicles are able to get to within 4

metres of the water supply outlet and the outlet must face away from the building if located less than 20 metres from the building to enable access during emergencies.

o Incorporate an additional 64 mm (minimum) gate or ball valve and 64 mm (fixed size), 3 threads per inch, male fitting to suit a CFA coupling.

o Incorporate a vortex inhibitor or additional water must be provided to ensure that the volume of water available is not restricted by a vortex. Refer to Section 5 of AS.2419 for requirements for vortex inhibitors.

o The water supply outlet must incorporate a ball or gate valve to provide access to the water by the resident of the dwelling.

o All below-ground water pipelines must be installed to at least the following depths:

- Subject to vehicle traffic: 300mm - Under dwellings or concrete slabs: 75mm - All other locations: 225mm

o The water supply must be readily identifiable from the building or appropriate signage must be provided which:

- Has an arrow pointing to the location of the water supply; - Has dimensions of not less than 310mm high and 400mm

long; - Is red in colour, with a blue reflective marker attached; and - Is labeled with a ‘W’ that is not less than 15cm high and 3cm

thick.

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Table 10 - Minimum static water supply requirements for dwellings in the BMO (CFA, 2012, p. 34). Office, Retail and Dwellings and Dependent Person’s units

Reticulated water supply and hydrant*

Effective Capacity

(litres)

CFA access to supply and

CFA couplings? Lot size less than 500 square

metres n/a 2,500 No

Lot size 500 – 1,500 square metres

Yes 5,000 No No 10,000 Yes

Lot size greater than 1,500 square metres n/a 10,000 Yes

Other Development

Reticulated

water supply and hydrant *

Effective Capacity

(litres)

CFA access to supply and

CFA couplings?

All other developments 10,000 per 1500 square metres up to 40,000

Yes

*Located within 120 metres of the rear of the building

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Appendix 2. Access requirements Access to the leachate storage tanks has to comply with the following relevant requirements (CFA, 2012):

• Driveways less than 30 metres in length have no requirements providing a fire brigade vehicle can get within 4 metres of the water supply outlet if required, i.e. if the lot size is greater then 1,500 m2 or a hydrant is not within 120 metres of the rear of the building.

• If the length of the driveway from the road to the building and water supply outlet (including gates, bridges and culverts) is greater than 30 metres, access to the building must be designed to allow emergency vehicle access. The minimum design requirements for the driveway are:

o Curves in driveway must have a minimum inner radius of 10 metres. o The average grade must be no more than 1 in 7 (14.4%) (8.1°) with a

maximum of no more than 1 in 5 (20%) (11.3°) for no more than 50 metres.

o Dips must have no more than a 1 in 8 (12.5%) (7.1°) entry and exit angle.

The driveway must: o Be designed, constructed and maintained for a load limit of at least 15

tonnes and be of all-weather construction; o Provide a minimum trafficable width of 3.5 metres and be

substantially clear of encroachments for at least 0.5 metres on each side; and

o Be clear of encroachments at least 4 metres vertically. • If the length of the driveway from the road to the building and water supply

outlet (including gates, bridges and culverts) is greater than 100 metres a turning area for fire fighting vehicles close to the building must be provided, by either:

o A turning circle with a minimum radius of 8 metres, or; o The driveway encircling the dwelling, or; o The provision of other vehicle turning heads – such as a T or Y head –

which meet the specification of Austroad Design for an 8.8 metre Service Vehicle.

• If the length of the driveway from the road to the building and water supply outlet (including gates, bridges and culverts) is greater than 200 metres, passing bays must be provided. Passing bays must be a minimum of 20 metres long and must be provided at least every 200 metres, with a minimum trafficable width of 6 metres.