P10.3.1 Monitor bore Bore flow. Bore pumps Investigate performance either stop. bore pump Failure of the System directly or using an performance. bore pump(s). pressure. Reduced, or observation bore. no, flow from Put E. coli. Schedule a preventive bore(s). maintenance maintenance programme(s) Reduced programme for bore in place. pressure in pumps, and a planned distribution Disinfect the maintenance zone fed distribution programme for the directly from zone if not overhaul of pumps. the bore. presently Monitor flow from the disinfected. bore. Monitor system with pressure. DWSNZ:2000. No maintenance log kept. 1 If the water is disinfected after being drawn from the bore, or the water is pumped into a reservoir before reticulation, the consequences of the event will not be as severe as when the bore water is pumped directly into the distribution system. Contingency Plans If an event happens despite preventive and corrective actions you have taken, you may need to consult with the Medical Officer of Health to assess how serious a problem is. Contamination gets in the water because of pump failure Event – Reservoir levels difficult to maintain. Indicators: Pump failure. Flow significantly reduced. Pressure decrease or fluctuations. Elevated levels of turbidity or chemical determinands. In 100 ml samples of water, is continually detectable, or E. coli is present at elevated levels (more than 10 per 100 ml). Increased chlorine demand. Widespread illness in the community linked to the water supply.
P10.3.1 Failure of the bore pump(s). Monitor bore performance either directly or using an observation bore. Schedule a preventive maintenance programme for bore pumps, and a planned maintenance programme for the overhaul of pumps. Monitor flow from the bore. Monitor system pressure. Bore flow. System pressure. E. coli. Bore pumps stop. Reduced, or no, flow from bore(s). Reduced pressure in distribution zone fed directly from the bore. with DWSNZ:2000. No maintenance log kept. Investigate bore pump performance. Put maintenance programme(s) in place. Disinfect the distribution zone if not presently disinfected. 1 If the water is disinfected after being drawn from the bore, or the water is pumped into a reservoir before reticulation, the consequences of the event will not be as severe as when the bore water is pumped directly into the distribution system. Contingency Plans If an event happens despite preventive and corrective actions you have taken, you may need to consult with the Medical Officer of Health to assess how serious a problem is. Event – Contamination gets in the water because of pump failure Indicators: Reservoir levels difficult to maintain. Pump failure. Flow significantly reduced. Pressure decrease or fluctuations. Elevated levels of turbidity or chemical determinands. In 100 ml samples of water, E. coli is continually detectable, or is present at elevated levels (more than 10 per 100 ml). Increased chlorine demand. Widespread illness in the community linked to the water supply.
treatment-pump-operation-feb14-v2.docx