The document discusses the process commissioning of wastewater treatment works across multiple sites in Huddersfield. It outlines the scope of works including installing new activated sludge process lanes and tanks at Lower Brighersfield, new sludge treatment facilities at Calder Valley, and decommissioning biological filters and tanks at Cooper Bridge. It provides details on commissioning the new activated sludge process and sludge treatment works, and decommissioning the existing biological filters at Cooper Bridge over the period of July to October 2009.