ISO INTERNATIONAL STANDARD 19258 Secondedition 2018-08 Soil quality Guidance on the determination of background values Qualité du sol - Recommandations pour la determination des valeurs de fond Reference number IS0 19258:2018(E) International Organization for Standardization isee=Shenzhen Institute of Standards and Technology 9972181 @IS02018 IS0 19258:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 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 or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland Internatinir prganization for Standardization Hicensee-sShenzhen Instute f Standards andeS- All rights reserved rious National Standards Bodies Not for Resale, 2018/11/26 07:53:12 No reproduction or networking permitted without license from IH IS0 19258:2018(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 4 General ..3 5 Procedures .3 5.1 General .3 5.2 Objectives and technical approaches. ..4 5.2.1 General. .4 5.2.2 Substances and parameters 5.2.3 Studyarea .6 5.2.4 Time period. .6 5.2.5 Scale of sampling 7 5.3 Evaluation of existing data ..7 5.3.1 General .7 5.3.2 Completeness of data sets/minimum requirements .7 5.3.3 Comparability of data (sampling, nomenclatures, analyses) .8 5.3.4 Examinationof outliers .8 5.4 Collection of new data 5.4.1 Sampling. .9 5.4.2 Soil analysis .13 5.5 Data processing and presentation .14 5.5.1 Statistical evaluation of data .14 5.5.2 Data presentation and reporting .. 15 6 Data handling/quality control ..16 Annex A (informative) Outlier tests ..18 Annex B (informative) Examples of the main substances and parameters ..22 Bibliography ..24 Intenationa ganzation28-Allrights reserved iii icensee=Shenzhen Institute of Standards and Technology 9972181 vided by IHS Markit un Not for Resale, 2018/11/26 07:53:12