CELTIC Technologies Ltd

Raynesway resource park - Case Study

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Courtesy of CELTIC Technologies Ltd

The Raynesway Resource Park is a 35 hectare site bounded on three sides by the River Derwent. The southern half of a former chemicals plant, soils and groundwaters were impacted by chlorinated solvents, acid tars, hydrocarbons and ammoniacal sludges. Celtic designed a sophisticated groundwater treatment system, integrating air sparging, multi-phase extraction and chemical oxidation to address groundwater impacted by chlorinated solvents, which ranks as one of the largest chemical oxidation projects in the UK. Ex-situ bio-remediation was applied to acid tars and hydrocarbons. A risk based approach to the ammonia bearing sludges significantly reduced remediation costs and programme.

Close out was achieved for groundwater against risk based targets for trichloroethylene (TCE),cis 1,2-dichloroethylene (1,2-DCE), vinyl chloride (VC) and benzene. For soils, close out was achieved against risk based targets for TPH Aliphatic C5-C12, TPH Aliphatic C8-C16, benzene, toluene, ethyl benzene and xylene (BTEX).

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