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Case Studies

Bioremediation of Hydrocarbons for Residential Redevelopment for Property NSW

December 2, 2023
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During a detailed investigation for the client Property NSW, EESI identified hydrocarbon contamination in the soils of a site being redeveloped for residential purposes. The presence of existing inground infrastructure, Underground Petroleum Storage System (UPSS), added complexity to the assessment as it was yet to be removed. EESI conducted a comprehensive assessment, drilling 60 soil bores and installing groundwater wells at 12 locations to revealing the need for targeted remediation.

The Solution

In response to the contamination, EESI was officially instructed to initiate remediation works. Engaging our NSW team’s remediation engineers and colleagues at New Soil, the project employed a combination of bioremediation and aeration to address petroleum hydrocarbon impacts in the soils. This involved a multi-phase approach, including site setup and safety controls, construction of bioremediation treatment pads, excavation of hardstand and hydrocarbon-impacted soils, and the utilisation of the patented Dynamic Biopile process for bioremediation. The process aimed to reduce organic contaminants in diesel to levels suitable for residential land use.

Client Benefits

The EESI NSW team’s bioremediation and aeration techniques successfully treated hydrocarbon-impacted soils, meeting criteria for residential land use. The validation of soils and reinstatement of treated soils into the excavation ensured a safe and environmentally sound and sustainable conclusion to the remediation project. Through this combined effort, the site transitioned from a state of hydrocarbon contamination to one suitable for residential purposes, showcasing the effectiveness of innovative bioremediation techniques.

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The Environmental Earth Sciences International Group acknowledges the Traditional Custodians of country throughout Australia and their connections to land, sea and community. We pay our respect to their Elders past, present and emerging and extend that respect to all Aboriginal and Torres Strait Islander peoples today.