BS_8580-1-2019.pdf

BS8580-1:2019BSI Standards PublicationWater quality-Risk assessments forLegionella control-Code of practicebsi.BS8580-1:2019BRITISH STANDARDPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the document was last issued.The British Standards Institution 2019Published by BSI Standards Limited 2019pasuao!1SBN97805805163681CS07.100.20.13.060.70The following BSI references relate to the work on this document:Committee reference EH/3/4Draft for comment 18/30367523 DCAmendments/corrigenda issued since publicationDateText affectedO THE BRITISH STANDARDS INSTITUTION 2019-ALL RIGHTS RESERVEDBRITISH STANDARDBS8580-1:2019ContentsPageForewordiiIntroduction21Scope22 Normative references33Terms and definitions34 Factors to be considered in the risk assessment65 Preparations for risk assessment5.1 Competence of the risk assessor65.2Agreeing the terms of reference55.3 Independence9治6 Desktop appraisal of documentation96.1 Preparation96.2Appraisal of the current scheme of control107Site survey127.1 General127.2Visual inspection of utilities/location for possible sources of contamination137.3Measurements147.4 Testing for Legionella148 Evaluation of the risk148.1 General148.2 Risk rating systems159Risk assessment reporting159.1 General159.2 Identified risks169.3 Control measures1710Risk review and reassessment17Annex A(informative)Factors to be considered during a risk assessment20Annex B(informative)Hot and cold water systems24Annex C(informative)Open evaporative cooling systems276Annex D(informative)Spa pools28Figure D.1-Diagram of a typical hot tub30Figure D.2-Diagram of a typical commercial spa pool31Annex E(informative)Other systems31Figure E.1-Example of a car wash schematic diagram368Annex F(informative)List of equipment41Annex G(informative)Schematic diagrams42Figure G.1-Example of a computer-drawn schematic diagram of an evaporative cooling system44Figure G.2-Example of a hand-drawn elevation of a hot and cold water system in acommercial building45Bibliography46Summary of pagesThis document comprises a front cover,and inside front cover,pages i to ii,pages 1 to 48,an inside back cover anda back cover.OTHE BRITISH STANDARDS INSTITUTION 2019-ALL RIGHTS RESERVED IBS8580-1:2019BRITISH STANDARDForewordPublishing informationThis British Standard is published by BSI Standards Limited,under licence from The BritishStandards Institution,and came into effect on 31 January 2019.It was prepared by SubcommitteeEH/3/4,Microbiological methods,under the authority of Technical Committee EH/3,Water quality.Alist of organizations represented on these committees can be obtained on request to their secretary.SupersessionThis British Standard supersedes BS 8580:2010,which is withdrawn.Use of this documentAs a code of practice,this British Standard takes the form of guidance and recommendations.Itshould not be quoted as if it were a specification and particular care should be taken to ensure thatclaims of compliance are not misleading.Any user claiming compliance with this British Standard is expected to be able to justify any course ofaction that deviates from its recommendations.Presentational conventionsThe provisions in this standard are presented in roman(i.e.upright)type.Its recommendations areexpressed in sentences in which the principal auxiliary verb isshould.Commentary,explanation and general informative material is presented in smaller italic type,and doesnot constitute a normative element.Where words have alternative spellings,the preferred spelling of the Shorter Oxford EnglishDictionary is used(e.g.organizationrather than organisation).The wordshouldis used to express recommendations of this standard.The wordmayis used inthe text to express permissibility,e.g.as an alternative to the primary recommendation of the clause.The word canis used to express possibility,e.g.a consequence of an action or an event.Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of a contract.Users areresponsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.II THE BRITISH STANDARDS INSTITUTION 2019-ALL RIGHTS RESERVED