P10.2.1 Schedule preventive Turbidity. Put maintenance, maintenance Process E. coli. particularly with schedule in pumps do not FAC. replacement of DWSNZ:2000. place. add the elastomeric parts: Chemical correct dose Signs of Review dosing diaphragms; tubing usage. of chemical. ineffective programme. etc., as per coagulation. Chemical type Replace manufacturers dosed. Difficulty pump(s) with recommendations. maintaining a one Coagulation Calibrate dosing chlorine appropriate process (if pumps for expected residual in the for the appropriate). duty. treated water. chemical Ensure are fit for being dosed No the purpose, eg., and its maintenance corrosion resistant. concentration. programme in Provide duplicate Obtain pumps for critical standby pump functions. (critical functions). Daily check amount of chemical used. Use day tanks to reduce risk of overdosing. Visually check pumps daily. Check stroke and speed settings for manual pumps. P10.2.2 Strainers on pump Flow rates to No, or Put strainers lines to remove irregular, flow in place. Process debris. to pumps Replace pump supplying Clean strainers Condition of with a unit water to regularly. strainers. having monitoring Fluctuating specifications Ensure pumps are fit Turbidity. readings from that match for the purpose. E. coli. fail. requirements. Check required flow FAC. Prepare and rates are within the follow range recommended maintenance by the manufacturer. with schedule. Schedule preventive Maintenance pump maintenance. log not kept. Strainers clogged. Event: CHANGES IN PRESSURE FROM THE BORE SUCK CONTAMINANTS INTO THE WATER Possible hazards: Germs and chemical contaminants. Level of risk: Moderate-high1
P10.2.1 Process pumps do not add the correct dose of chemical. Schedule preventive maintenance, particularly replacement of elastomeric parts: diaphragms; tubing etc., as per manufacturers recommendations. Calibrate dosing pumps for expected duty. Ensure are fit for the purpose, eg., corrosion resistant. Provide duplicate pumps for critical functions. Daily check amount of chemical used. Use day tanks to reduce risk of overdosing. Visually check pumps daily. Check stroke and speed settings for manual pumps. Turbidity. E. coli. FAC. Chemical usage. Chemical type dosed. Coagulation process (if appropriate). with DWSNZ:2000. Signs of ineffective coagulation. Difficulty maintaining a chlorine residual in the treated water. No maintenance programme in Put maintenance schedule in place. Review dosing programme. Replace pump(s) with one appropriate for the chemical being dosed and its concentration. Obtain standby pump (critical functions). P10.2.2 Process pumps supplying water to monitoring fail. Strainers on pump lines to remove debris. Clean strainers regularly. Ensure pumps are fit for the purpose. Check required flow rates are within the range recommended by the manufacturer. Schedule preventive pump maintenance. Flow rates to Condition of strainers. Turbidity. E. coli. FAC. No, or irregular, flow to Fluctuating readings from with Maintenance log not kept. Strainers clogged. Put strainers in place. Replace pump with a unit having specifications that match requirements. Prepare and follow maintenance schedule. Event: CHANGES IN PRESSURE FROM THE BORE SUCK CONTAMINANTS INTO THE WATER Possible hazards: Germs and chemical contaminants. Level of risk: Moderate-high1
treatment-pump-operation-feb14-v2.docx