Abstract: A composition and method for the removal of biological fouling from wetted surfaces intermittently or continuously in contact with water is disclosed. The method includes the steps of preparing a cleaning composition of basic pH from a strong base and an active oxygen donor component, applying the composition to the surface to be cleaned, and after a selected residence time, removing any unreacted cleaning composition and all removed fouling by rinsing or flushing with water.

Abstract: A method for determining the relative level of contamination of a component in a water treatment infrastructure is disclosed. The method includes the steps of at least partially filling the component with water; isolating the component from the remainder of the infrastructure; taking a control water sample from the component at a point in time Ts and determining the quality of the water sample at Ts; storing the control water sample for a preselected test period Tt and in a container which will not affect the quality of the water sample; taking a second water sample from the component at a point in time Ts+Tt; determining the quality of the second water sample and the quality of the control water sample at Ts+Tt and calculating the water quality decrease in the control sample and the second sample during the test period Tt. The relative level of contamination of the component is calculated by subtracting any water quality decrease in the control sample from the water quality decrease in the second sample.