You are the newly-appointed engineer/scientist recruited to improve management and control of the operation of the water treatment plant of a city. The city obtains raw water from a dam and the water is treated in a conventional drinking water treatment plant to produce water that complies with drinking water quality requirements. However, serious complaints about the drinking water quality have been received from consumers during the past year and analytical reports from an independent laboratory have also caused concern. It is your task to evaluate the operation of the plant and to develop a plan of action to improve plant performance and reliability. Answer the following questions in sufficient detail to demonstrate your competence to perform this task.(i) Explain what is meant by a multiple barrier safeguarding approach to protect water quality.
