Details required by condition 15 (contamination) of planning permission 17/03288/FULL for proposed improvement works to water treatment works including new process and filter plant, tanks, kiosks and associated works, replacement landscaped areas, alterations to internal access road within the site and creation of areas of hardstanding for operational purposes. Replacement of existing fence along the western boundary with a security fence 3.5m high. Temporary contractor's compound with temporary offices, welfare facilities, parking area and storage areas on land north of the existing operational site, with temporary gated access off Monkey Island Lane.