Principal Demolition and In Situ Bioremediation in Western Sydney
Perfect Contracting delivered principal demolition and large-scale site remediation for Akura’s redevelopment at Emu Plains, Western Sydney. Works included full building and pavement removal, slab rip-up, onsite concrete crushing and stockpiling for reuse as road base, and in situ bioremediation of hydrocarbon-impacted soils using bacterial biodiversity to achieve environmental clearance under the project’s approvals.
The project was delivered over six months on site with zero incidents and zero LTIs, completed safely and on program.
At a glance
Client / Principal: Emu Plains Developments Pty Ltd (Akura)
Location: 158–164 Old Bathurst Road, Emu Plains, NSW
Role: Principal contractor (construction delivery, not design and construct)
Approvals: DA22/0417 (Demolition, approved 23 Nov 2022); DA23/0506 (Land Remediation Works, Local Planning Panel approval)
Delivery documentation: Demolition Staging Plan (Rev 4, 9 Dec 2024), Unexpected Finds Protocol (Sydney Environmental Group, 6 Dec 2024), Remedial Action Plan by JBS&G (Rev 5, 8 Jun 2023)
HSEQ: Zero incidents, zero LTIs
Sustainability: Onsite circularity through crushing concrete for future road base reuse and in situ bioremediation to minimise offsite cart-away
Scope
Perfect Contracting delivered:
- Principal demolition of all buildings and ancillary structures
- Removal of slabs, asphalt and redundant stormwater within the redevelopment footprint
- Onsite crushing of concrete to produce reusable stockpiles for future base/subbase applications (stockpiles tested for compliance prior to reuse)
- In situ bioremediation of hydrocarbon-impacted soils via biostimulation and targeted bioaugmentation to accelerate natural attenuation
- Verification testing and reporting in line with the Remedial Action Plan and DA conditions for sign-off
How we delivered the works
Controls first
Exclusion zones, traffic management and dust controls were implemented in accordance with the Demolition Staging Plan and integrated with Council conditions under the demolition approval.
Material circularity through onsite processing
Slabs were ripped, concrete was crushed and stockpiled onsite, then sampled and tested to confirm suitability for reuse as road base as part of the broader redevelopment. This reduced waste, avoided disposal and reduced the need for imported material.
In situ bioremediation of hydrocarbon-impacted soils
Hydrocarbon-impacted soils were treated in place by enhancing bacterial biodiversity and activity, including oxygenation and nutrient amendments to accelerate the breakdown of petroleum hydrocarbons. This approach reduced heavy transport movements and helped preserve soil structure.
Verification and clearance
Validation sampling and project documentation demonstrated that acceptance criteria were met for clearance under the remediation approval pathway, aligned to the Remedial Action Plan and consent conditions.
Risk, safety and compliance
Delivery was completed as principal contractor under the demolition and remediation approvals, supported by the Unexpected Finds Protocol and Remedial Action Plan requirements.
Environmental risks were managed through controls for dust, runoff, odour, waste tracking and validation testing. The full six-month program was delivered with zero incidents and zero LTIs.
Outcome
- Demolition completed safely and efficiently
- Concrete diverted from waste through onsite crushing and stockpiling for reuse
- Hydrocarbon-impacted soils treated in place to achieve the clearance pathway set by approvals, reducing truck movements, costs and carbon
- Project completed on program with disciplined safety and environmental control
Perfect Contracting acknowledges the Aboriginal and Torres Strait Isander people as Traditional Custodians of the country on which we live and work. We pay our respects to the Traditional Custodians and Elders past, present and future, and honour their connection to the land and ongoing contribution to society.