A major scheme in Manchester city centre, the new development will combine retail and office space over a 17 acre site. Former industry included the Gaythorne gas works, whose legacy was a wide range of contaminants related to the coal gasification process. Chemical stabilisation was applied to contaminated materials excavated from four gas holder bases, with in-situ stabilisation applied to materials in a fifth gas holder base and impacted soils in other areas of the site. Multi-phase extraction was employed to remove mobile coal tars from the saturated zone. Contract value was over £5 million, with works carried out under an NEC3 Option A contract.