ISO INTERNATIONAL STANDARD 18400-202 First edition 2018-10 Soil quality - Sampling Part 202: Preliminary investigations Qualite du sol-Echantillonnage- Partie 202:Investigations preliminaires Referencenumber IS018400-202:2018(E) @IS02018 IS0 18400-202:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below orIso's memberbody in the countryof therequester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Fax:+41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 18400-202:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions .1 4 General/principle ..2 5 Phases of investigation .2 6 Objectivesofpreliminaryinvestigations ..4 7 Scope of preliminary investigations .5 7.1 General/strategy ..5 7.2 Deskstudy. .8 7.2.1 General .8 7.2.2 Information on past and present use .9 7.2.3 hydrogeology .11 7.2.4 Ecologyand archaeology .11 7.3 Consultations ..12 7.4 Site reconnaissance ..13 8 Developmentofthepreliminaryconceptual sitemodel ..14 8.1 Overallconceptualsitemodel .14 8.2 Characteristic distributions of thephysico-chemical properties .16 8.3 Formulationofcontamination-relatedhypotheses ..17 8.4 Preliminary qualitative risk assessment for potentially contaminated sites ..17 8.5 Further investigations ..18 9 Reportingthepreliminaryinvestigationandtheconceptualsitemodel ..18 AnnexA (informative)Contaminants of potential concern and industry/contaminant matrix ..20 Bibliography .34 @ IS0 2018 -All rights reserved iii