BS EN 12566-6:2016 BSI Standards Publication Small wastewater treatment systems for up to 50 PT Part 6: Prefabricated treatment units for septic tank effluent BS EN 12566-6:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 12566-6:2016 It supersedes BS EN 12566-6:2013 which is withdrawn The UK participation in its preparation was entrusted to Technical Committee B/505, Wastewater engineering A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2016 Published by BSI Standards Limited 2016 ISBN 978 580 91479 ICS 13.060.30 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2016 Amendments/corrigenda issued since publication Date Text affected BS EN 12566-6:2016 EN 12566-6 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM August 2016 ICS 13.060.30 Supersedes EN 12566-6:2013 English Version Small wastewater treatment systems for up to 50 PT - Part 6: Prefabricated treatment units for septic tank effluent Petites installations de traitement des eaux usées jusqu'à 50 PTE - Partie 6: Unités préfabriquées de traitement des effluents de fosses septiques Kleinkläranlagen für bis zu 50 EW - Teil 6: Vorgefertigte Bauteile für die weitergehende Behandlung des aus Faulgruben ablaufenden Abwassers This European Standard was approved by CEN on 25 June 2016 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-CENELEC 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 under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 12566-6:2016 E BS EN 12566-6:2016 EN 12566-6:2016 (E) Contents Page European foreword Scope Normative references 3.1 3.2 Terms, definitions, symbols, units and abbreviated terms Terms and definitions Symbols and abbreviated terms 4.1 4.1.1 4.1.2 4.1.3 4.1.4 4.2 4.3 4.3.1 4.3.2 4.3.3 4.4 4.5 4.6 4.6.1 4.6.2 4.7 4.7.1 4.7.2 4.7.3 4.8 Products characteristics Design General Overall dimensions Inlets, outlets, internal pipework and connections Access Load bearing capacity 10 Secondary treatment efficiency 10 General 10 Secondary treatment efficiency ratio 10 Microorganism reduction 11 Watertightness 11 Power consumption 11 Durability 11 General 11 Concrete, steel, PVC-U, PE, GRP, PDCPD and flexible sheets 12 Reaction to fire 12 General 12 Units classified as Class A1 without the need for testing 12 Units classified according to the test results 12 Dangerous substances 13 5.1 5.1.1 5.1.2 5.1.3 5.2 5.3 Testing, assessing and sampling methods 13 Load bearing capacity 13 Generals 13 Load bearing capacity determined by calculation 13 Load bearing capacity determined by testing 14 Secondary treatment capacity 16 Watertightness 17 6.1 6.2 6.2.1 6.2.2 6.2.3 6.2.4 6.2.5 6.3 6.3.1 6.3.2 Assessment and verification of constancy of performance (AVCP) 17 General 17 Type testing 17 General 17 Test samples, testing and compliance criteria 18 Test reports 20 Shared other party results 20 Cascading determination of the product type results 21 Factory production control (FPC) 22 General 22 Requirements 22 BS EN 12566-6:2016 EN 12566-6:2016 (E) 6.3.3 6.3.4 6.3.5 6.3.6 6.3.7 Product specific requirements 25 Initial inspection of factory and of FPC 25 Continuous surveillance of FPC 26 Procedure for modifications 26 One-off products, pre-production products (e.g prototypes) and products produced in very low quantity 26 Classification and designation (Nominal designation) 27 8.1 8.2 8.3 8.4 Marking, labelling and packaging 27 Marking 27 Technical information accompanying the unit 28 Installation instructions 29 Operation and maintenance instructions 29 Annex A (normative) Secondary treatment efficiency test procedure 31 A.1 Selection of the unit and its preliminary evaluation 31 A.1.1 General 31 A.1.2 Installation and commissioning 31 A.1.3 Operation and maintenance procedures during testing 31 A.1.4 Data to be monitored 31 A.2 Test procedure 32 A.2.1 Time for establishment 32 A.2.2 Influent characteristics 32 A.2.3 Daily flow pattern for testing 32 A.2.4 Test method 32 A.2.4.1 General 32 A.2.4.2 Overload 34 A.2.4.3 Peak flow discharge 34 A.2.4.4 Power breakdown/Machine breakdown 34 A.2.4.5 Power consumption 34 A.2.5 Influent and effluent sampling 34 A.3 Sample analysis 34 A.4 Test report 34 Annex B (normative) Presentation of the microorganisms test results 36 Annex C (informative) Analysis method 37 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Regulation 38 ZA.1 Scope and relevant characteristics 38 ZA.2 Procedure of attestation of conformity of prefabricated secondary treatment units 39 ZA.2.1 System(s) of AVCP 39 ZA.2.2 Declaration of performance (DoP) 42 BS EN 12566-6:2016 EN 12566-6:2016 (E) ZA.2.2.1 General 42 ZA.2.2.2 Content 43 ZA.2.2.3 Example of DoP 44 ZA.3 CE marking and labelling 47 Bibliography 50 BS EN 12566-6:2016 EN 12566-6:2016 (E) European foreword This document (EN 12566-6:2016) has been prepared by Technical Committee CEN/TC 165 “Waste water engineering”, the secretariat of which is held by DIN This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2017, and conflicting national standards shall be withdrawn at the latest by May 2018 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights This document supersedes EN 12566-6:2013 This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s) For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document The differences between this version and EN 12566-6:2013 are mainly editorial changes according to the Construction Product Regulation (CPR) and declaration of power consumption and desludging during treatment efficiency test The standard series EN 12566 “Small wastewater treatment systems for up to 50 PT” contains the following parts (see Figure 1): — Part 1: Prefabricated septic tanks; — Part 3: Packaged and/or site assembled domestic wastewater treatment plants; — Part 4: Septic tanks assembled in situ from prefabricated kits; — Part 6: Prefabricated treatment units for septic tank effluent (this document); — Part 7: Prefabricated tertiary treatment unit For filtration systems, CEN/TC 165 decided to publish the following CEN Technical reports, which are considered as Code of practices and not specify treatment requirements: — Part 2: Soil infiltration systems — Part 5: Pre-treated Effluent Filtration systems BS EN 12566-6:2016 EN 12566-6:2016 (E) Key A domestic wastewater prefabricated septic tank C treated infiltrated effluent packaged and/or site assembled domestic wastewater treatment plant B D E septic tank effluent treated wastewater tertiary wastewater treated soil infiltration system septic tank assembled in situ from prefabricated kit pre-treated effluent filtration system prefabricated treatment unit used for septic tank effluent prefabricated tertiary treatment unit National regulations may specify different arrangements between the products described in the standard series EN 12566 Figure — Scheme related to the arrangement of the parts of EN 12566 or CEN/TR 12566 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 12566-6:2016 EN 12566-6:2016 (E) Scope This European Standard specifies requirements, test methods, evaluation of conformity and marking for prefabricated secondary treatment units used for the treatment of effluent from septic tanks according to EN 12566-1 or EN 12566-4 in small wastewater treatment systems for up to 50 PT NOTE Equivalent septic effluent may come from existing septic tanks It applies to the prefabricated secondary treatment unit, where all its components are packaged or siteassembled and placed on the market as a kit by one manufacturer The prefabricated secondary treatment unit consists of one or more tanks made of concrete, steel, unplasticised polyvinylchloride (PVC-U), polyethylene (PE), glass reinforced polyester (GRP-UP), polypropylene (PP), polydicyclopentadiene (PDCPD) or container made of flexible sheets (HDPE, PP, PVC, EPDM) Other components specified by the manufacturer, such as pipes, pumps and filter material will be considered as part of the unit This European Standard establishes the performance of the prefabricated secondary treatment units needed to verify their suitability for the end use conditions for which the test methods are specified This European Standard applies for the packaged and/or site assembled secondary treatment units for use on the top of the ground (outside the building) or buried in the ground where no vehicle loads are applied to the unit This European Standard does not cover: — non watertight secondary treatment units with direct infiltration into the ground; — retrofit kits (see definition in 3.1.7) Normative references The following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for its application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 16323:2014, Glossary of wastewater engineering terms EN 12566-1, Small wastewater treatment systems for up to 50 PT — Part 1: Prefabricated septic tanks EN 12566-3:2016, Small wastewater treatment systems for up to 50 PT — Part 3: Packaged and/or site assembled domestic wastewater treatment plants EN 12566-4, Small wastewater treatment systems for up to 50 PT — Part 4: Septic tanks assembled in situ from prefabricated kits EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using data from reaction to fire tests Terms, definitions, symbols, units and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12566-3:2016 and EN 16323:2014 and the following apply BS EN 12566-6:2016 EN 12566-6:2016 (E) 3.1.1 packaged secondary treatment unit prefabricated factory-built unit which treats septic tank effluent to a declared quality 3.1.2 site assembled secondary treatment unit unit supplied by one manufacturer composed of prefabricated components, assembled on site, which treats septic tank effluent to a declared quality 3.1.3 open unit prefabricated unit where there is no cover 3.1.4 nominal designation expressed as an integer giving the maximum number of population equivalent appropriate to the plant 3.1.5 product family group of products in which, for the purpose of evaluation, the selected property(s) is/are similar for all products within the group Note to entry: The definition of family takes into account at least similar shape, equipment, materials and conditions of end use and ensures the minimum hydraulic efficiency and minimum structural behaviour for all the products in the range Note to entry: The minimum level of performance (hydraulic efficiency and structural behaviour) are given by the test carried out on one model of the family 3.1.6 wastewater treatment system combination of units (e.g septic tank) and/or products (e.g pipes, pumps) required for the construction of wastewater treatment plant according to Figure 3.1.7 retrofit kit set of components that are provided by a single manufacturer for installation within an existing septic tank 3.1.8 flexible sheet flexible impermeable liner 3.2 Symbols and abbreviated terms The following symbols and abbreviations are used in this standard: BOD5 BOD7) COD KN NH4-N (or Biochemical oxygen demand at days (or days) Chemical oxygen demand Kjeldahl nitrogen Ammonium nitrogen BS EN 12566-6:2016 EN 12566-6:2016 (E) Table ZA.2 — System(s) of AVCP Product Intended use Level(s) or class(es) Attestation of conformity systems To be used outside buildings for faecal and organic effluents - A1*, A2*, B*, C* Kits and elements for wastewater ––––– For all use(s) when treatment plants ––––––subject to regulations on reaction to fire A1**, A2**, B**, C**, D, E (A1 to E)***, F ––––––3 System 1: See Regulation (EU) No 305/2011 (CPR) Annex V, 1.2 System 3: See Regulation (EU) No 305/2011 (CPR) Annex V, 1.4 System 4: See Regulation (EU) No 305/2011 (CPR) Annex V, 1.5 * Products/ materials for which a clearly identifiable stage in the production process results in an improvement of the reaction to fire classification (e.g an addition of fire retardants or a limiting of organic material) ** Products/ materials not covered by footnote (*) *** Products/ materials that not require to be tested for reaction to fire (e.g Products/materials of class A1 according to the Decision 96/603/EC, as amended) NOTE Prefabricated secondary treatment units fall within the definition of the product given in Table ZA.2 The AVCP of the prefabricated treatment units for septic tank effluent in Table ZA.1 shall be according to the AVCP procedures indicated in Table(s) ZA.3.1 to ZA.3.3 resulting from application of the clauses of this or other European Standard indicated therein The content of tasks of the notified body shall be limited to those essential characteristics as provided for, if any, in Annex III of the relevant mandate and to those that the manufacturer intends to declare 40 BS EN 12566-6:2016 EN 12566-6:2016 (E) Table ZA.3.1 — Assignment of AVCP tasks for prefabricated secondary treatment units under a Tasks Tasks for the manufacturer Tasks for the notified testing laboratory a Content of the task Factory production control (FPC) Further samples testing of Determination of the product-type on the basis of type testing (based on sampling carried out by the manufacturer), type calculation, tabulated values or descriptive documentation of the product Initial inspection of manufacturing plant and of FPC Continuous surveillance, assessment and evaluation of FPC AVCP clauses to apply Parameters related to the characteristics of Table ZA.1, the performances of which are to be declared for the relevant intended uses including those subject to reaction to fire regulations 6.3.1, 6.3.2, 6.3.3, 6.3.6, 6.3.7 All essential characteristics of Table ZA.1 relevant for the intended use which are declared except reaction to fire 6.2 Reaction to fire 6.3 Reaction to fire 6.3.4 Reaction to fire 6.3.5 For products covered by footnote (*) of Table ZA.2 41 BS EN 12566-6:2016 EN 12566-6:2016 (E) Table ZA.3.2 — Assignment of AVCP tasks for prefabricated secondary treatment units under system a Tasks Tasks for the manufacturer Tasks for a notified testing laboratory a Factory production control (FPC) Determination of the product-type on the basis of type testing (based on sampling carried out by the manufacturer), type calculation, tabulated values or descriptive documentation of the product Content of the task AVCP clauses to apply All essential characteristics of Table ZA.1 relevant for the intended use which are declared 6.3.1, 6.3.2, 6.3.3, 6.3.6, 6.3.7 All essential characteristics of Table ZA.1 relevant for the intended use which are declared 6.2 For products covered by footnote (**) of Table ZA.2 Table ZA.3.3 — Assignment of AVCP tasks for prefabricated secondary treatment units under system a Tasks Factory production control (FPC) Tasks for the manufacturer a Determination of the product-type on the basis of type testing, type calculation, tabulated values or descriptive documentation of the product Content of the task AVCP clauses to apply All essential characteristics of Table ZA.1 relevant for the intended use which are declared 6.3.1, 6.3.2, 6.3.3, 6.3.6, 6.3.7 All essential characteristics of Table ZA.1 relevant for the intended use which are declared 6.2 For products covered by footnote (***) of Table ZA.2 ZA.2.2 Declaration of performance (DoP) ZA.2.2.1 General The manufacturer draws up the DoP and affixes the CE marking on the basis of the different AVCP systems set out in Annex V of the Regulation (EU) No 305/2011: In case of products under system — the factory production control and further testing of samples taken at the factory according to the prescribed test plan, carried out by the manufacturer; and — the certificate of constancy of performance issued by the notified product certification body on the basis of determination of the product type on the basis of type testing (including sampling), type calculation, tabulated values or descriptive documentation of the product; initial inspection of the 42 BS EN 12566-6:2016 EN 12566-6:2016 (E) manufacturing plant and of factory production control and continuous surveillance, assessment and evaluation of factory production control In case of products under system — the factory production control carried out by the manufacturer; and — the determination of the product-type on the basis of type testing (based on sampling carried out by the manufacturer), type calculation, tabulated values or descriptive documentation of the product, carried out by the notified testing laboratory In case of products under system — the factory production control carried out by the manufacturer; — the determination by the manufacturer of the product-type on the basis of type testing, type calculation, tabulated values or descriptive documentation of the product ZA.2.2.2 Content The model of the DoP is provided in Regulation (EU) No 574/2014 According to this Regulation, the DoP shall contain, in particular, the following information: — the reference of the product-type for which the declaration of performance has been drawn up; — the AVCP system or systems of the construction product, as set out in Annex V of the CPR; — the reference number and date of issue of the harmonized standard which has been used for the assessment of each essential characteristic; — where applicable, the reference number of the Specific Technical Documentation used and the requirements with which the manufacturer claims the product complies The DoP shall in addition contain: a) the intended use or uses for the construction product, in accordance with the applicable harmonized technical specification; b) the list of essential characteristics, as determined in the harmonized technical specification for the declared intended use or uses; c) the performance of at least one of the essential characteristics of the construction product, relevant for the declared intended use or uses; d) where applicable, the performance of the construction product, by levels or classes, or in a description, if necessary based on a calculation in relation to its essential characteristics determined in accordance with the Commission determination regarding those essential characteristics for which the manufacturer shall declare the performance of the product when it is placed on the market or the Commission determination regarding threshold levels for the performance in relation to the essential characteristics to be declared; e) the performance of those essential characteristics of the construction product which are related to the intended use or uses, taking into consideration the provisions in relation to the intended use or uses where the manufacturer intends the product to be made available on the market; 43 BS EN 12566-6:2016 EN 12566-6:2016 (E) f) for the listed essential characteristics for which no performance is declared, the letters “NPD” (No Performance Determined) Regarding the supply of the DoP, article of the Regulation (EU) No 305/2011 applies The information referred to in Article 31 or, as the case may be, in Article 33 of Regulation (EC) No 1907/2006, (REACH) shall be provided together with the DoP ZA.2.2.3 Example of DoP The following gives an example of a filled-in DoP for prefabricated secondary treatment units DECLARATION OF PERFORMANCE No 0012014-09-30 Unique identification code of the product-type: Type, batch or serial number or any other element allowing identification of the construction product as required under Article 11: prefabricated secondary treatment unit BWV 41 (concrete) BWV 714 from to 50 PT Intended use or uses of the construction product, in accordance with the applicable harmonized technical specification, as foreseen by the manufacturer: Name, registered trade name or registered trade mark and contact address of the manufacturer as required under Article 11: prefabricated secondary treatment units for population up to 50 inhabitants AnyCo SA, PO Box 21 B-1050 Brussels, Belgium Tel +32987654321 Email: anyco.sa@provider.be Where applicable, name and contact address of the authorized representative whose mandate covers the tasks specified in Article 12: Anyone Ltd Flower Str 24 West Hamfordshire UK-589645 United Kingdom 44 BS EN 12566-6:2016 EN 12566-6:2016 (E) Tel +44987654321 e-mail: anyone.ltd@provider.uk System or systems of assessment and verification of constancy of performance of the construction product as set out in CPR, Annex V: System for all essential characteristics except reaction to fire System for reaction to fire In case of the declaration of performance concerning a construction product covered by a harmonized standard: Notified body number 0001 performed product type testing under system and issued test report 12345/2014 No European Technical Assessment has been issued for this product 45 BS EN 12566-6:2016 EN 12566-6:2016 (E) Declared performance Essential characteristics Performance Reaction to fire Effectiveness of treatment expressed as: secondary treatment efficiency ratios microorganism reduction Treatment capacity (Nominal designation) Number of desludging during CE test COD: 80 % BOD5: 80 % SS: 70 % P: NPD KN: NPD From to 50 PT 0,2 kWh/d Watertightness Pass Crushing resistance Durability Release substance of dangerous EN 12566– 6:2016 E Coli:1 000 cfu/100 ml log unit Intestinal enterococci: 000 cf/100 ml 1,5 log unit Power consumption Load bearing capacity Class A1 Harmonized technical specification Height of backfill: 0,5 m WET: 1,20 m Pass NPD 10 The performance of the product identified in points and is in conformity with the declared performance in point This declaration of performance is issued under the sole responsibility of the manufacturer identified in point Signed for and on behalf of the manufacturer by: (name and function) 46 BS EN 12566-6:2016 EN 12566-6:2016 (E) (place and date of issue) (signature) ZA.3 CE marking and labelling The CE marking symbol shall be in accordance with the general principles set out in Article 30 of Regulation (EC) No 765/2008 and shall be affixed visibly, legibly and indelibly: — to the prefabricated septic plant; or — to a label attached to it Where this is not possible or not warranted on account of the nature of the product, it shall be affixed: — to the packaging; or — to the accompanying documents The CE marking shall be followed by: — the last two digits of the year in which it was first affixed; — the name and the registered address of the manufacturer, or the identifying mark allowing identification of the name and address of the manufacturer easily and without any ambiguity; — the unique identification code of the product-type; — the reference number of the declaration of performance; — the level or class of the performance declared; — the dated reference to the harmonized technical specification applied as it appears in OJEU; — the identification number of the notified body; — the intended use as laid down in the harmonized technical specification applied The CE marking shall be affixed before the construction product is placed on the market It may be followed by a pictogram or any other mark notably indicating a special risk or use Figure ZA.1 gives an example of the information related to products subject to AVCP under system (all characteristics except reaction to fire) and (for reaction to fire) 47 BS EN 12566-6:2016 EN 12566-6:2016 (E) “CE marking, consisting of the “CE”symbol 9876 Identification number of the notified test laboratory Any Co Ltd, P.O Box 21, B–1050 name and the registered address of the manufacturer, or identifying mark 16 Last two digits of the year in which the marking was first affixed 0012014–09–30 Reference number of the DoP EN 12566–6:2016 Prefabricated treatment units for septic tank effluent — - Product’s reference code: “BWV 41” — - Material: CONCRETE To be used outside buildings for septic tank effluent No of European Standard applied, as referenced in OJEU Unique identification code of the product-type Intended use of the product as laid down in the European Standard applied Effectiveness of treatment: Treatment efficiency (at COD: 80 % tested organic daily load BOD5: 80 % BOD5 = 0,9 kg/d) SS: 70 % P NPD KN NPD Number of desludging during CE test Power consumption Microorganism reduction 0,2 kWh/d E Coli: 000 cfu/100 ml log unit Intestinal enterococci: cf/100 ml 1,5 log unit Treatment capacity PT (nominal designation): Watertightness: (water Pass test) Crushing resistance: Load bearing capacity 48 Height of backfill 0,5 m WET 1,20 m 000 Level or class of the performance declared BS EN 12566-6:2016 EN 12566-6:2016 (E) Durability Reaction to fire Pass A1 Release of dangerous NPD substances Figure ZA.1 — Example CE marking information of products under AVCP system (all characteristics except reaction to fire) and (reaction to fire) 49 BS EN 12566-6:2016 EN 12566-6:2016 (E) Bibliography [1] EN 476, General requirements for components used in drains and sewers [3] EN 872, Water quality — Determination of suspended solids — Method by filtration through glass fibre filters [2] [4] [5] [6] [7] EN ISO 9001, Quality management systems — Requirements (ISO 9001) EN 1899-1, Water quality — Determination of biochemical oxygen demand after n days (BODn) — Part 1: Dilution and seeding method with allylthiourea addition (ISO 5815:1989, modified) EN 12260, Water quality — Determination of nitrogen — Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides EN 25663, Water quality — Determination of Kjeldahl nitrogen — Method after mineralization with selenium (ISO 5663) EN ISO 6878, Water quality — Determination of phosphorus — Ammonium molybdate spectrometric method (ISO 6878) [8] EN ISO 10304-1, Water quality — Determination of dissolved anions by liquid chromatography of ions — Part 1: Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate (ISO 10304-1) [9] EN ISO 11732, Water quality — Determination of ammonium nitrogen — Method by flow analysis (CFA and FIA) and spectrometric detection (ISO 11732) [10] [11] [12] [13] [14] [15] EN ISO 11885, Water quality — Determination of selected elements by inductively coupled plasma optical emission spectrometry (ICP-OES) (ISO 11885) EN ISO 11905-1, Water quality — Determination of nitrogen — Part 1: Method using oxidative digestion with peroxodisulfate (ISO 11905-1) EN ISO 13395, Water quality — Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection (ISO 13395) EN ISO 14911, Water quality — Determination of dissolved Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ using ion chromatography — Method for water and waste water (ISO 14911) EN ISO 15681-2, Water quality — Determination of orthophosphate and total phosphorus contents by flow analysis (FIA and CFA) — Part 2: Method by continuous flow analysis (CFA) (ISO 15681-2) ISO 5664, Water quality — Determination of ammonium — Distillation and titration method [16] ISO 6060, Water quality — Determination of the chemical oxygen demand [18] ISO 7150-1, Water quality — Determination of ammonium — Part 1: Manual spectrometric method [17] 50 ISO 6778, Water quality — Determination of ammonium — Potentiometric method BS EN 12566-6:2016 EN 12566-6:2016 (E) [19] ISO 15705, Water quality — Determination of the chemical oxygen demand index (ST-COD) — Small-scale sealed-tube method [20] EN ISO 7899-1, Water quality — Detection and enumeration of intestinal enterococci in surface and wastewater — Part 1: Miniaturized method (Most Probable Number) by inoculation in liquid medium (ISO 7899-1) [21] EN ISO 7899-2, Water quality — Detection and enumeration of intestinal enterococci — Part 2: Membrane filtration method (ISO 7899-2) [22] EN ISO 9308-1, Water quality — Enumeration of Escherichia coli and coliform bacteria — Part 1: Membrane filtration method for waters with low bacterial background flora (ISO 9308-1) [23] EN ISO 9308-3, Water quality — Detection and enumeration of Escherichia coli and coliform bacteria in surface and wastewater — Part 3: Miniaturized method (Most Probable Number) by inoculation in liquid medium (ISO 9308-3) [24] EN 1992-1-1, Eurocode 2: Design of concrete structures —Part 1-1: General rules and rules for buildings [25] EN 1993-1-1, Eurocode 3: Design of steel structures — Part 1-1: General rules and rules for buildings 51 This page deliberately left blank This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Reproducing extracts We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions For permission to reproduce content from BSI publications contact the BSI Copyright & Licensing team The knowledge embodied in our standards has been carefully assembled in a dependable format and refined through our 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