ISO INTERNATIONAL STANDARD 23875 First edition 2021-02 AMENDMENT 1 2022-06 Mining Air quality control systems for operator enclosures Performance requirements and test methods AMENDMENT 1 Exploitation miniere - Systemes de controle de la qualité de I'air destinés aux enceintes de I'opérateur-Exigences de performance et méthodes d'essai AMENDEMENT1 Reference number IS0 23875:2021/Amd.1:2022(E) ISO2022 IS0 23875:2021/Amd.1:2022(E) COPYRIGHT PROTECTED DOCUMENT @IS02022 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: +4122 749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2022 - All rights reserved