Ms Margaret Attridge:

A chlorine alarm could be checked on a weekly basis. The point here is that the alarms are not going to go off unless there is something wrong with the treatment plant. It is the SCADA system that provides us with the information on the performance of the treatment plant and we can monitor that the chlorine levels are operating within compliance on a continuous basis. It would be one of the duties of the caretakers to check that on a continuous basis, irrespective of the alarms working or not.