Preventive measures Checking preventive measures Corrective action Causes What to check Signs that action is needed Event: INCORRECT WATER QUALITY DATA USED FOR SUPPLY MANAGEMENT cont’d G2.1.2 Use equipment that meets Audit of Poor Consult Referee the requirements of the equipment Method for Inadequate/ Referee Methods (or calibration comparison guidance incorrect test methods calibrated against and performance. concerning equipment or the Referee Method) maintenance equipment incorrectly No, or contained in DWSNZ:2000. records. specifications. calibrated test incomplete, equipment. Carry out routine record of Put maintenance maintenance as specified calibration schedule in place. by the manufacturer. quality control and Consult Referee results. maintenance. Undertake calibration Method for procedures as set out in the guidance Referee Method, or as concerning specified by the calibration. manufacturer, or have them carried out independently. G2.1.3 Ensure shelf-lives of Poor Consult Referee reagents are known and laboratory Method for Inadequate date at which they need to quality control comparison reagent stability reagents be prepared again noted on results. performance. information. the container. Reagent Reagent Provide and use Ensure reagents are stored preparation preparation appropriate appropriately (usually this is records. records storage. in the dark and cool). indicate Start keeping reagents are Maintain records for the records. too old. preparation of reagent solutions and calibration standards. Preparation calculations should be independently Cross check reagent quality by repeat analysis of a sample using old and newly-prepared reagents when new reagents have been prepared. G2.1.4 See DWSNZ:2000 to find Poor Check out which methods can be laboratory DWSNZ:2000 for Inappropriate used, and if necessary use quality control comparison acceptable method or the referee method to results. performance. methods. incorrect validate an alternative calibration. Improve method. documentation of Ensure that the calibration method. procedures specified in the Identify staff method are followed. training needs Ensure staff are adequately and provide trained in calibration training. procedures required in the method. G2.1.5 Undertake regular audits of Audit of Poorly kept Start audits. records. monitoring monitoring Inadequate or Identify staff and training records (eg, incorrect Ensure staff are trained in training needs records sampling monitoring the maintenance of records. and provide location, date, records. training. Ensure that independent sample checks are made on data Start independent identification entry. checks. number, etc)
Causes Preventive measures Checking preventive measures Corrective action What to check Signs that action is needed Event: INCORRECT WATER QUALITY DATA USED FOR SUPPLY MANAGEMENT cont’d G2.1.2 Inadequate/ incorrect test equipment or incorrectly calibrated test equipment. Use equipment that meets the requirements of the Referee Methods (or methods calibrated against the Referee Method) contained in DWSNZ:2000. Carry out routine maintenance as specified by the manufacturer. Undertake calibration procedures as set out in the Referee Method, or as specified by the manufacturer, or have them carried out independently. Audit of equipment calibration and maintenance records. quality control results. Poor comparison performance. No, or incomplete, record of calibration and maintenance. Consult Referee Method for guidance concerning equipment specifications. Put maintenance schedule in place. Consult Referee Method for guidance concerning calibration. G2.1.3 Inadequate reagents Ensure shelf-lives of reagents are known and date at which they need to be prepared again noted on the container. Ensure reagents are stored appropriately (usually this is in the dark and cool). Maintain records for the preparation of reagent solutions and calibration standards. Preparation calculations should be independently Cross check reagent quality by repeat analysis of a sample using old and newly-prepared reagents when new reagents have been prepared. quality control results. Reagent preparation records. Poor comparison performance. Reagent preparation records indicate reagents are too old. Consult Referee Method for reagent stability information. Provide and use appropriate storage. Start keeping records. G2.1.4 Inappropriate method or incorrect calibration. See DWSNZ:2000 to find out which methods can be used, and if necessary use the referee method to validate an alternative method. Ensure that the calibration procedures specified in the method are followed. Ensure staff are adequately trained in calibration procedures required in the method. quality control results. Poor comparison performance. Check DWSNZ:2000 for acceptable methods. Improve documentation of method. Identify staff training needs and provide training. G2.1.5 Inadequate or incorrect monitoring records. Undertake regular audits of records. Ensure staff are trained in the maintenance of records. Ensure that independent checks are made on data entry. Audit of monitoring and training records Poorly kept monitoring records (eg, sampling location, date, sample identification number, etc) Start audits. Identify staff training needs and provide training. Start independent checks. laboratory laboratory
general-monitoring-feb14-v2.docx