BS EN ISO BRITISH STANDARD 8192:2007 Water quality Test for inhibition of oxygen consumption by activated sludge for carbonaceous and uo!ep!xo niuouuue The European Standard ENIS0 8192:2007has the status of a BritishStandard ICS 13.060.30; 13.060.70 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSENISO8192:2007 National foreword This British Standard was published by BSI. It is the UK implementation of EN ISO 8192:2007. It supersedes BS EN ISO 8192:1995 (BS 6068-5.7:1987), which are withdrawn. The UK participation in its preparation was entrusted by Technical Committee EH/3,Water quality,to SubcommitteeEH/3/5, Biological methods. A list of organizations represented on this committee can be obtained on request to its secretary. IS0 8192:2007, which is a revision of IS08192:1986, was instigated following a UK initiative to modify the procedure to facilitate parallel investigations of inhibition of carbonaceous oxidation and nitrification within the same test. The UK, as a member of CEN, is obliged topublish ENISO 8192:2007as a British Standard. However, attention is drawn to the fact that the UK voted against its approval at the final stage of revision of the International Standard. The reason for this disapproval was that changes introduced to the text at the final pre-approval stage have obscured the meaning of certain sections and introduced ambiguities, contradictions and some minor technical errors. Corrections requested by UK technical committee EH/3/5 at this final pre-approval stage were not included in the published IsO Standard and as a consequence the same deficiencies also appear in EN ISO 8192:2007. A list of the changes introduced and possible solutions are given in National annex NA. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was Amendmentsissuedsincepublication published under the authority of the Standards Policy and Date Amd. No. Comments Strategy Committee on 31August 2007 BSI 2007 ISBN 978 0 580 54191 9 EN ISO 8192 EUROPEANSTANDARD NORMEEUROPEENNE EUROPAISCHENORM February2007 ICS13.060.70 SupersedesENISO8192:1995 English Version Water quality - Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation (ISO8192:2007) Qualite de 'eau— Essai d'inhibition de la consommation Wasserbeschaffenheit Bestimmung der Hemmung des d'oxygene par des boues activees pour Ioxydation du Sauerstoffverbrauchs von Belebtschlamm nach carbone et de I'ammonium (ISO 8192:2007) Kohlenstoff- und Ammonium-Oxidation (ISO 8192:2007) This European Standard was approved by CEN on 29 December 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG Management Centre:ruedeStassart, 36 B-1050 Brussels @2007CEN All rights of exploitation in any form and by any means reserved Ref.No.EN ISO 8192:2007:E worldwide for CEN national Members. ENISO 8192:2007 Foreword