ISO INTERNATIONAL STANDARD 5667-24 First edition 2016-04-01 Water quality - Sampling Part 24: Guidance on the auditing of water quality sampling Qualité de I'eau - Echantillonnage - Partie 24: Lignes directrices pour I'audit de I'echantillonnage de la qualité de I'eau Reference number IS0 5667-24:2016(E) ISO International Organization for Standardization HEJIANG INST OF STANDARDIZATION C1 5956617 @ IS0 2016 ed without license from IHS IS0 5667-24:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. IsOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org PrganizationforStandardization ensee-ZHEJIANG INSTOF STANDARDIZAoISQ6- All rights reserved etworking permitted without license from IHS IS0 5667-24:2016(E) Contents Page Foreword ..V Introduction. ..vii 1 Scope 2 Normative references 3 Terms and definitions 4 Multiple audits. 5 Auditing objectives. ..5 6 Internal audit objectives ..6 7 External audit objectives .6 8 Identification of the critical factors in the water quality sampling process .6 8.1 Identificationofcriticaloperationalsteps 8.2 Auditprioritizationexercise 1 8.3 Unscheduled observations.. ..7 8.4 Follow-up actions.. ..8 Risk-based versus judgement-based approaches to auditing. .8 9 9.1 General ..8 9.2 Risk-based auditing. .8 9.3 Judgement-based auditing .9 9.4 Auditing assumptions .9 10 Document auditing. .9 10.1 Sampling programme and sampling practitioner/operative instruction documents .9 10.2 Sampling manual. .9 10.2.1 General. .9 10.2.2 Contents 10 10.2.3 Format. .11 10.2.4 The laboratory interface .12 10.3 Training policy .13 10.4 Sampling record sheets .13 10.5 Labels .13 10.6 Chain of custody records .14 10.7 Laboratory receipt.. .15 10.8 Assessment of documents before the field assessment. .15 10.9 Assessment of completed documents. ..15 10.10 Policy on statements of uncertainty ..16 11 Real-time audit ..16 11.1 Audit forms .16 11.2 Field observation .16 11.3 Real-time risk-based auditing (see also 9.2) ..17 11.4 Real-time judgement-based auditing (see also 9.3) ..17 11.5 Evidence of internal audits. ..17 12 Design of an audit plan ..17 12.1 Consultation with the responsible person ..17 12.2 Pre-audit questionnaire. .17 12.3 Plan design .18 12.4 Audit practice .18 12.4.1 Staff competence assessments. ..18 12.4.2 Supervision. .18 12.4.3 Equipment. ..19 12.4.4 Handling of samples. ..19 Intematinal oganzation @stS2016 - All rights reserved iii Isee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS Not for Resale, 2016/6/2 08:51:5C