REDS Group were commissioned to complete environmental assessment works following an accidental diesel spill at an industrial facility.
REDS Group were commissioned to complete environmental assessment works following an accidental diesel spill at an industrial facility.
Initial spill response works had cleaned up spilt fuel inside the buildings, but an unknown volume of fuel had migrated into surrounding drainage systems and areas of soft standing.
We were commissioned to carry out a full environmental assessment at the site, investigating the potential impact of underlying soils and groundwater and designing a suitable remedial strategy.
SITE INVESTIGATION AND RISK ASSESSMENT
This investigation included:
Preliminary Risk Assessment
Full Intrusive Site Investigation
Detailed Quantitive Risk Assessment (DQRA)
This investigation found:
The initial site inspection identified the drainage system was connected to a soak-away, resulting in direct impact of underlying soils and groundwater.
The full site investigation identified hydrocarbon impact of underlying soils and groundwater that potentially posed an unacceptable risk to identified human and controlled water receptors.
A DQRA was completed to determine whether the concentrations of hydrocarbons recorded in groundwater posed an unacceptable risk
identified controlled water receptors and derive site-specific remedial targets for the site.
REMEDIATION
Excavation of hydrocarbon impacted shallow soils.
Removal of impacted soils from around drainage infrastructure.
In-situ remedial treatment of the underlying groundwater using Oxygen Release Compound (ORC)
VERIFICATION
Groundwater samples were collected using low-flow sampling techniques and key groundwater parameters reviewed to confirm natural attenuation processes were active.
Dissolved hydrocarbon concentrations reduced rapidly following our remedial works, with none of the hydrocarbon concentrations recorded in groundwater found to exceed the site-specific remedial target levels for the site.
We concluded the site did not pose a potential risk to identified receptors and was suitable for ongoing commercial use.
At a former industrial site, REDS Group was tasked with remedying residual hydrocarbon contamination before the existing lease expired and the area underwent future redevelopment.
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REDS Group recently secured the contract for the Lundy North Re-Engineering (Civil Phase) 2019
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