The Department has already approved the commencement of certain advance elements of the scheme at different locations around the town in order to alleviate pressure on the existing treatment plan from infiltration of surface water and to tie in with other improvement works. Last month, as an environmental protection measure, the Minister approved funding for Mayo County Council to begin work on two contracts to extend the out-fall from the treatment plant to a point further downstream where dilution rates are greater. The Minister also recently approved the invitation of tenders for a major sewer, surface water pipeline and pumping station contract. All these works are being procured by conventional contracts, which will see them undertaken mainly by contractors to the council's own specifications and design.