Efforts are being made at all levels within the construction industry to improve environmental performance. All personnel involved in the construction and maintenance of infrastructure developments should be aware of their environmental obligations and the benefits that best practice will bring to a construction project. This guide provides good practice advice in identifying appropriate methods of protecting the water environment and for carrying out most activities you will encounter on-site. This guide accompanies C648 - Control of water pollution from linear construction projects. Technical guidance is aimed at clients, designers, regulators, environmental consultants, construction managers and site environmental managers in both the design and construction phases of a project. It provides good practice advice and is intended to supplement any contractual requirements, consultation with regulators or company procedures rather than replace them.