ISO INTERNATIONAL STANDARD 22475-1 Secondedition 2021-10 Geotechnical investigation and testing Sampling methods and groundwater measurements Part 1: Technical principles for the sampling of soil, rock and groundwater Reconnaissance et essais géotechniques - Méthodes de prelevement et mesurages piézométriques Partie 1: Principes techniques pour le prelevement des sols, des roches et des eaux souterraines Reference number IS0 22475-1:2021(E) ISO @IS02021 IS0 22475-1:2021(E) COPYRIGHT PROTECTED DOCUMENT @IS02021 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, withoutpriorwrittenpermission.Permission can berequestedfrom eitherIso at theaddress below orIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved