Redclyffe Substation
Efficient Remediation at Redclyffe Substation
Advanced Environmental Services (AES) was engaged by Sparrow Construction to urgently remediate asbestos contamination at the Redclyffe Substation after previous work left hazardous debris under the building. AES’s swift and effective approach ensured the site was cleared of over 4 tonnes of contaminated material, all while meeting safety standards and completing the project on time and within budget.
Fast Facts
Customer: Sparrow Construction
Location: Napier, New Zealand
Duration: 2 Weeks
Value: $70k+
Scope: Asbestos Removal
Overview
After an earlier contractor improperly removed paper-backed vinyl sheeting from the Redclyffe Substation, hazardous debris was discovered scattered under the building weeks later. AES was engaged by Sparrow Construction to swiftly and safely remediate the contamination, ensuring the site was cleared and compliant with safety standards.
Key Challenges
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Improper Initial Removal: The original asbestos removal was conducted without proper controls, leaving hazardous debris throughout the subfloor.
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Large Area of Contamination: A large section of the subfloor, including 4 tonnes of newly laid metal aggregate, needed to be remediated under Class A controls.
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Difficult Access: The building’s elevated structure, built on wooden piles following flood damage from Cyclone Gabrielle, allowed for easier access to the subfloor but exposed the removal enclosure to weather risks.
Solutions & Innovations
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Negative Pressure Enclosure: AES constructed a negative pressure enclosure within the subfloor, ensuring a controlled environment for safe asbestos removal. Trenches were dug to secure the wall sheeting for an airtight seal.
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Weather Protection: To mitigate exposure to the elements, plywood sheets were added around the exterior walls of the enclosure, ensuring the setup remained intact throughout the project.
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Efficient Waste Management: A 10-ton hook bin and truck were dedicated to the project, allowing for streamlined waste removal and disposal.
Outcome
In just 10 days, AES successfully constructed the removal enclosure, removed 4 tonnes of contaminated metal aggregate, and cleaned all underfloor services and subfloor framing for clearance. The project was completed on time and within budget, with AES even assisting the client on the final day to re-lay the new aggregate.
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