SIST EN 14654-4:2021
(Main)Drain and sewer systems outside buildings - Management and control of activities - Part 4: Control of inputs from users
Drain and sewer systems outside buildings - Management and control of activities - Part 4: Control of inputs from users
This European Standard establishes the general principles for the management and control of operational activities in drain and sewer systems outside buildings and specifies requirements for development and implementation of work programmes, and the selection of techniques.
This document together with EN 14654-1 covers the management and control of inputs from users.
It is applicable to drain and sewer systems from the point where wastewater leaves a building, roof drainage system, or paved area, to the point where it is discharged into a wastewater treatment plant or receiving water body.
Drains and sewers below buildings are included provided that they do not form part of the drainage system of the building.
Entwässerungssysteme außerhalb von Gebäuden - Management und Überwachung von Maßnahmen - Teil 4: Kontrolle von Einleitungen der Nutzer
Dieses Dokument stellt die Anforderungen an das Management und an die Überwachung von Maßnahmen in Entwässerungssystemen außerhalb von Gebäuden auf und legt Anforderungen an die Entwicklung und Umsetzung der Arbeitsprogramme und die Auswahl von Maßnahmen fest.
Dieses Dokument behandelt zusammen mit EN 14654-1 die Kontrolle von Einleitungen der Nutzer.
Es gilt für Entwässerungssysteme von dem Punkt an, wo das Abwasser das Gebäude, die Dachentwässerung oder die befestigte Fläche verlässt, bis zu dem Punkt, an dem das Abwasser in eine Kläranlage oder in ein aufnehmendes Gewässer eingeleitet wird.
Abwasserleitungen und -kanäle unterhalb von Gebäuden sind hierbei eingeschlossen, solange sie nicht Bestandteil der Gebäudeentwässerung sind.
Réseaux d'évacuation et d'assainissement à l'extérieur des bâtiments - Gestion et contrôle des activités opérationnelles - Partie 4: Contrôle des intrants des usagers
Le présent document établit les prescriptions de gestion et de contrôle des activités dans les réseaux d’évacuation et d’assainissement à l’extérieur des bâtiments, et spécifie les prescriptions concernant l’élaboration et la mise en oeuvre de programmes de travaux, ainsi que le choix des techniques employées. Le présent document et l’EN 14654-1 couvrent le contrôle des intrants des usagers.
Il s’applique aux réseaux d’évacuation et d’assainissement à partir du point où les eaux usées quittent un bâtiment, un système d’évacuation de toiture ou une surface revêtue, jusqu’au point où elles se déversent dans une station d’épuration ou un milieu récepteur aquatique.
Les branchements et les collecteurs d’assainissement situés sous les bâtiments sont également visés dès l’instant qu’ils ne font pas partie du système d’évacuation propre au bâtiment.
Sistemi za odvod odpadne vode in kanalizacijo zunaj stavb - Upravljanje in nadzor aktivnosti - 4. del: Kontrola vnosa pri uporabnikih
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 14654-4:2021
01-marec-2021
Sistemi za odvod odpadne vode in kanalizacijo zunaj stavb - Upravljanje in nadzor
aktivnosti - 4. del: Kontrola vnosa pri uporabnikih
Drain and sewer systems outside buildings - Management and control of activities - Part
4: Control of inputs from users
Entwässerungssysteme außerhalb von Gebäuden - Management und Überwachung von
Maßnahmen - Teil 4: Kontrolle von Einleitungen der Nutzer
Réseaux d'évacuation et d'assainissement à l'extérieur des bâtiments - Gestion et
contrôle des activités opérationnelles - Partie 4: Contrôle des intrants des usagers
Ta slovenski standard je istoveten z: EN 14654-4:2021
ICS:
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
SIST EN 14654-4:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 14654-4:2021
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SIST EN 14654-4:2021
EN 14654-4
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2021
EUROPÄISCHE NORM
ICS 93.030
English Version
Drain and sewer systems outside buildings - Management
and control of activities - Part 4: Control of inputs from
users
Réseaux d'évacuation et d'assainissement à l'extérieur Entwässerungssysteme außerhalb von Gebäuden -
des bâtiments - Gestion et contrôle des activités Management und Überwachung von Maßnahmen - Teil
opérationnelles - Partie 4: Contrôle des intrants des 4: Kontrolle von Einleitungen der Nutzer
usagers
This European Standard was approved by CEN on 6 December 2020.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14654-4:2021 E
worldwide for CEN national Members.
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SIST EN 14654-4:2021
EN 14654-4:2021 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 General . 6
5 Integrated sewer system management planning . 7
5.1 Introduction . 7
5.2 Control of inputs from users . 7
6 Preparation of the input control programme . 7
6.1 Introduction . 7
6.2 Review of the inputs control activities planning . 7
6.3 Investigation . 7
6.4 Assessment . 9
6.5 Development of the programme . 10
7 Preparation of the project specification . 13
7.1 Introduction . 13
7.2 Review of the project description and project objectives . 13
7.3 Investigation . 13
7.4 Assessment . 13
7.5 Drafting the project specification. 14
8 Implementation of projects . 17
9 Measurement of conformity . 18
9.1 Measurement methods . 18
9.2 Non-conformities . 18
9.3 Post project appraisal . 18
10 Review of plan and programme . 18
Annex A (normative) Impacts of inappropriate inputs from users . 19
Annex B (informative) Criteria for assessment of generally inappropriate inputs . 24
Bibliography . 26
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SIST EN 14654-4:2021
EN 14654-4:2021 (E)
European foreword
This document (EN 14654-4:2021) has been prepared by Technical Committee CEN/TC 165
“Wastewater 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 July 2021, and conflicting national standards shall be
withdrawn at the latest by July 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
EN 14654 consists of the following parts, under the general title Drain and sewer systems outside
buildings — Management and control of activities:
— Part 1: General;
— Part 2: Rehabilitation;
— Part 3: Drain and sewer cleaning;
— Part 4: Control of inputs from users (the present document).
Other parts, dealing with other activities, may be added later.
In drafting this part of EN 14654, account has been taken of other available standards, in particular
EN 752, Drain and sewer systems outside buildings and EN 13508 Investigation and assessment of drain
and sewer systems outside buildings.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
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SIST EN 14654-4:2021
EN 14654-4:2021 (E)
1 Scope
This document establishes requirements for the management and control of activities in drain and
sewer systems outside buildings and specifies requirements for development and implementation of
work programmes, and the selection of techniques.
This document together with EN 14654-1:2021 covers the control of inputs from users.
It is applicable to drain and sewer systems from the point where wastewater leaves a building, roof
drainage system, or paved area, to the point where it is discharged into a wastewater treatment plant or
receiving water body.
Drains and sewers below buildings are included provided that they do not form part of the drainage
system of the building.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 752:2017, Drain and sewer systems outside buildings - Sewer system management
EN 14654-1:2021, Drain and sewer systems outside buildings - Management and control of operational
activities - Part 1: General requirements
EN 16323:2014, Glossary of wastewater engineering terms
EN 13508-2:2003+A1:2011, Investigation and assessment of drain and sewer systems outside buildings –
Part 2: Visual inspection coding system
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16323:2014, EN 752:2017 and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
NOTE Certain key definitions from EN 16323:2014 have been repeated below for clarity. The following
additional terms used in this document are defined in EN 16323:2014:
— drain;
— sewer system;
— receiving water body;
— wastewater treatment plant;
— sewer.
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SIST EN 14654-4:2021
EN 14654-4:2021 (E)
3.1
domestic wastewater
water polluted by the human life, including water discharged from kitchens, laundry rooms, lavatories,
bathrooms, toilets and similar facilities
[SOURCE: EN 16323:2014, 2.1.2.3]
3.2
foul wastewater
wastewater comprising domestic wastewater and/or industrial wastewater
[SOURCE: EN 16323:2014, 2.1.2.6]
3.3
industrial wastewater
wastewater discharge resulting from any industrial or commercial activity
[SOURCE: EN 16323:2014, 2.1.2.7]
3.4
input
any solid or liquid matter that is discharged into or otherwise enters a drain or sewer system including
wastewater
3.5
non-domestic wastewater
water polluted by industrial, craft or commercial activity
[SOURCE: EN 16323:2014, 2.1.2.5]
3.6
surface water
water from precipitation, which has not seeped into the ground and is discharged to the drain or sewer
system directly from the ground or from exterior building surfaces
[SOURCE: EN 16323:2014, 2.1.1.3]
3.7
user
any individual, domestic or non-domestic entity discharging into a drain or sewer system
3.8
wastewater
water composed of any combination of water discharged from domestic, industrial or commercial
premises, surface run-off and accidentally any sewer infiltration water
[SOURCE: EN 16323:2014, 2.3.10.65]
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SIST EN 14654-4:2021
EN 14654-4:2021 (E)
4 General
Foul drain and sewer systems are designed to receive inputs of domestic wastewater and some types of
non-domestic wastewater (see EN 752:2017, 8.2).
Surface water systems are designed only to receive inputs of surface water (see EN 752:2017, 8.2).
Combined drain and sewer systems are designed to receive inputs of domestic wastewater, some types
of non-domestic wastewater and a certain amount of surface water (see EN 752:2017, 8.2).
Most types of sewer systems are constructed for foul inputs consisting primarily of human waste, toilet
paper, laundry water and kitchen washing up water. Increasingly foul inputs tend to include products
that can be harmful to sewer systems. Examples of such generally harmful inputs are listed in Annex B.
Inputs of non-domestic wastewater to foul and combined drain and sewer systems are often controlled
by formal agreements or regulations. Inputs of other sources of foul wastewater to foul and combined
drain and sewer systems are not usually subject to these formal controls.
Controls are sometimes placed on the input of polluted surface water to surface water and combined
drain and sewer systems.
The input of surface water to combined drain and sewer systems is sometimes subject to control to
limit the amount of surface water discharged.
National and local regulations can specify controls on the inputs to drain and sewer systems.
The methods of control available to wastewater utilities depend on national and local regulations.
The control of inputs to drains and sewers can be carried out pro-actively, to prevent problems
occurring, or reactively in response to problems that have occurred. When control is required before
connecting to the network, appropriate access to the incoming discharge is necessary.
This document applies the process described in EN 14654-1:2021 for implementing activities to control
of inputs in the integrated drain and sewer system management plan. This document shall be used in
conjunction with EN 14654-1:2021.
National or local regulations or the relevant authority can:
a) prohibit certain inputs to certain types of drain or sewer system (e.g. discharge of surface water to
foul drain or sewer systems or the discharge of foul wastewater to surface water drain or sewer
systems);
b) prohibit inputs that contain certain specific substances (e.g. priority substances and certain other
pollutants according to Annex II of Directive 2008/105/EC);
c) prohibit inputs that contain certain classes of substances (e.g. substances that could block drains or
sewers, substances that could damage the components of the drain or sewer system, or the
treatment process);
d) require some types of input (e.g. industrial wastewater inputs) to be regulated by a permit.
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SIST EN 14654-4:2021
EN 14654-4:2021 (E)
5 Integrated sewer system management planning
5.1 Introduction
An operations and maintenance plan (see EN 752:2017, 6.4.4.3), dealing with control of inputs should
be in place for the drain and sewer system prior to carrying out major programmes. Activities for the
control of inputs can be one aspect of the operations and maintenance plan, which is part of an
integrated sewer system management plan. However, this is not always possible if works are required
urgently (e.g. in response to a sewer failure).
5.2 Control of inputs from users
The aim of input control is to limit any adverse impact of inputs from users on:
a) structural integrity of the components of the sewer system or the wastewater treatment plant;
b) function, operation and the service life of the drain or sewer system;
c) function, operation and the service life of any mechanical or electrical equipment;
d) function, operation and the service life of the wastewater treatment plant;
e) the public, by causing nuisance;
f) the environment;
g) health and safety for users and for operating staff (toxic risks, explosives, etc.);
h) costs incurred by the wastewater system operator.
Criteria for determining the impacts of inputs from users on the wastewater system are given in
Annex A.
6 Preparation of the input control programme
6.1 Introduction
The input control programme defines the approach to be taken to the control of each input either
specifically for an individual input or generally for a defined class of inputs.
6.2 Review of the inputs control activities planning
A review should be undertaken of the control of inputs aspects of the operations and maintenance plan
within the integrated sewer system management plan (see EN 752:2017, Clause 6).
6.3 Investigation
6.3.1 Introduction
The investigation shall review whether any inputs from users are adversely impacting or could
adversely impact the system. Possible impacts are listed in 5.2.The locations of inputs having an adverse
impact on the drain or sewer system should be identified based on:
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SIST EN 14654-4:2021
EN 14654-4:2021 (E)
1) investigation of non-domestic wastewater inputs into the drain and sewer system;
2) inspection of the drain and sewer system;
3) analysis of the causes of performance failures (e.g. sewer blockages);
4) review of the available information which may include the performance of similar systems
elsewhere.
6.3.2 Review of previous investigations
The review should include:
a) drain and sewer system performance information to identify locations where there have been
operational incidents (e.g. sewer blockages) that could have been caused by inputs;
b) existing visual inspection information to identify locations where there has been damage to the
components of the drain or sewer system that could have been caused by inputs;
c) existing visual inspection information to identify locations where settled or attached deposits could
be caused by inputs;
d) any sewer cleaning programme (see EN 14654-3:2021) to identify whether the components of
inputs are likely to have been a significant contributory cause of the accumulated deposits;
e) wastewater treatment plant performance information to identify failures that could have been
caused by inputs;
f) pollution incident reports to identify incidents that could have been caused by inputs;
g) industrial wastewater discharge records to identify the potential sources of damaging inputs.
6.3.3 Further investigations
Investigations should be carried out where further information is needed in order to produce the
programme. These investigations can be either proactively in anticipation of an event, or reactively in
response to it.
These can include:
a) visual inspection of drains, sewers (see EN 13508-2:2003+A1:2011) and wastewater treatment
plants to identify damage or deposits;
b) investigation at the locations of sewer blockage incidents to identify whether the components of
inputs continue to be a significant contributory cause of the future blockages;
c) investigation of the contents of blockages in drains, sewers and wastewater treatment plants to
identify the nature and likely sources of the materials;
d) investigation of the causes of any unacceptable pollution resulting from inputs from surface water
outfalls;
e) Investigation of the causes of any unacceptable pollution resulting from inputs from wastewater
treatment plants;
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SIST EN 14654-4:2021
EN 14654-4:2021 (E)
f) Investigation of specific locations:
1) Premises which could give rise to unacceptable inputs (e.g. food service establishments, fuel
stations, hospitals and care homes, campsites);
2) Sources of pollutants or solids that could be discharged into the systems by the users (e.g. car
washing on roads or parking areas, fuel stations, construction sites);
3) Low points where surface water can collect or flood prone locations where users could lift foul
sewer covers to relieve it;
g) Review of pumping times or flows to detect:
1) the presence of surface water in a foul wastewater drain;
2) unexpected flows in a surface water or combined drain.
6.4 Assessment
The assessment shall identify the locations where the performance of the system is being, or could be,
unacceptably affected by inputs to the drain or sewer system.
When frequent problems occur, the nature of impacts may possibly be only one of the contributory
factors. Other factors such as poor gradient, system defects, the fabric of the sewer etc. can cause
problems. Where the consequences are severe, consideration should also be given to the feasibility of
carrying out rehabilitation works to prevent or reduce the impact of inputs on the performance of the
drain and sewer system.
Each input can be classified according to a grid that characterizes the nature of the problems
encountered:
— Type 1: problems of industrial or commercial inputs requiring the installation of equipment and
possibly permits and means of control;
— Type 2: user input problems that require information campaigns and possibly the mobilization of
regulatory power;
— Type 3: Other problem not related to inputs from user.
The need for intervention can be described by an additional code:
a) input is acceptable in its current state;
b) input should be reduced/prevented;
c) input should be urgently reduced/avoided in a defined time period.
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EN 14654-4:2021 (E)
6.5 Development of the programme
6.5.1 Introduction
A control of inputs programme shall:
— identify optimum frequencies for pro-active control of inputs activities;
— identify optimum frequencies for review of data;
— maintain or reduce the number of reactive control of inputs activities to an acceptable level.
6.5.2 Specification of objectives
The objectives of control of inputs activities should be established in accordance with the aims
described in 5.2. These should be expressed as a performance requirement, for example:
a) to reduce to a specified number, the numbers of blockages of drains and sewers or of mechanical
equipment caused by a specific input; or
b) to reduce the frequency of cleaning activities required to achieve specified performance; or
c) to reduce the number of pollution incidents.
6.5.3 Developing options
6.5.3.1 Introduction
Methods of control can, depending on national or local regulations (see Clause 4) include:
a) use of regulatory powers (where available);
b) information campaigns to change user behaviour;
c) other solutions.
6.5.3.2 Use of regulatory powers
Depending on national or local regulations, utilities can have regulatory powers. Other relevant
organisations may also have regulatory powers. Examples are given below.
a) to control inputs by requiring certain classes of users (usually industrial wastewater inputs but also
commercial and craft activities wastewater inputs) to have a permit to discharge, which limits the
type and quantities of substances that may be discharged. The approach taken can include:
1) emission limit permits – specifying limits on the quantities or concentrations of specified
substances that may be discharged;
2) method based permits – for example specifying the method of pre-treatment that is to be
undertaken prior to discharge;
3) a combination of the above approaches.
b) to prohibit the discharge of certain substances into the drain or sewer system.
c) to regulate or supervise building work carried out or commissioned by users to ensure that where
there are separate systems, new connections are made to the correct system.
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EN 14654-4:2021 (E)
d) To require those users responsible for discharging the inputs to take certain remedial actions, for
example to:
1) divert foul wastewater, that has been incorrectly connected to a surface water system, to a foul
drain or sewer system;
2) divert surface water, that has been incorrectly connected to a foul system, to a surface water
drain or sewer system;
3) install a separator or other treatment system to limit the impact of the input on the drain or
sewer system;
e) Use of regulatory powers to control the sale of products that can be discharged into the drain or
sewer system or to require such products to be properly labelled with information about disposal.
Impacts of inappropriate inputs from users given in Annex A. Information on possible criteria for
assessment of generally inappropriate inputs is given in Annex B.
The method of verifying compliance with regulations should be determined and the cost of compliance
monitoring should be estimated.
6.5.3.3 Influencing behaviour
As an alternative or in addition to the use of regulatory powers, or where regulatory powers are not
available, consideration should be given to influencing the behaviour of users of the drain and sewer
system by:
a) providing information to inform them of good practice;
b) providing information to inform them of the financial and functional consequences of inappropriate
inputs;
c) providing information to influence manufacturers or retailers of products about the consequences
of inappropriate inputs;
d) providing information to commercial and industrial dischargers;
e) development of voluntary labelling schemes for generally problematic products to indicate the
appropriate methods of disposal (functional requirements to assess whether such products are
suitable for disposal via the sewer are given in Annex A. Information from product testing and
research could increase the effectiveness of any communication. Information on the assessment of
generally inappropriate inputs possible testing criteria are given Annex B.);
f) providing information directed at all those users undertaking or commissioning construction work
or installation of appliances or equipment to ensure that:
1) connections are made to the correct system;
2) arrangements are made to ensure that large quantities of sand and gravel are not conveyed
into drains and sewers;
3) access covers should not be located in low points where flooding is likely to occur and should
not be opened to drain flooding surface water.
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EN 14654-4:2021 (E)
These activities can be generally directed to all users of the drain or sewer system across the whole
catchment area or they may be targeted at locations where specific problems have been identified or in
parts of the catchment area where there are concentrations of problems.
Advice should be sought from communications specialists to ensure that the information campaigns use
the most effective forms of communications to the target groups.
6.5.3.4 Other solutions
Other forms of solutions can include works undertaken under the control of the system operator to:
a) divert foul wastewater, that has been incorrectly connected to a surface water system, to a foul
drain or sewer system;
b) divert surface water, that has been incorrectly connected to a foul system, to a surface water drain
or sewer system;
c) install a separator (see EN 16933) or pre-treatment system.
These works can be the responsibility of the user.
6.5.4 Assess feasibility of solutions
The solutions developed in 6.5.3 shall be assessed in accordance with EN 14654-1:2021. The following
factors should also be considered:
a) the practicality of using the regulatory power;
b) the probable effectiveness of information campaigns (pilot studies can be used to estimate the
effect) and the time over which they are likely to be effective before they need to be repeated;
c) the practicality of ensuring effective quality control of all relevant construction and installation
work carried out or commissioned by the user.
6.5.5 Select optimum solutions
In selecting the optimum solution or combination of solutions in accordance with EN 14654-1:2021 the
costs considered should include:
a) cost of the implementation;
b) cost of on-going monitoring and enforcement activity;
c) on-going costs to maintain the effectiveness;
The relative effectiveness of each option should also be taken into account.
6.5.6 Producing the programme
The programme should specify:
a) information required by EN 14654-1:2021, 6.5.6;
b) criteria, if any, to be used to determine whether the inputs will be subject to specific permitting
requirements or to general regulations;
c) nature of the inputs to be prohibited, including consumer products;
d) investigations of possible wrong connections.
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SIST EN 14654-4:2021
EN 14654-4:
...
SLOVENSKI STANDARD
oSIST prEN 14654-4:2019
01-julij-2019
Sistemi za odvod odpadne vode in kanalizacijo zunaj stavb - Upravljanje in nadzor
aktivnosti - 4. del: Kontrola vnosa pri uporabnikih
Drain and sewer systems outside buildings - Management and control of activities - Part
4: Control of inputs from users
Entwässerungssysteme außerhalb von Gebäuden - Management und Überwachung von
Maßnahmen - Teil 4: Kontrolle von Einleitungen der Nutzer
Réseaux d'évacuation et d'assainissement à l'extérieur des bâtiments - Gestion et
contrôle des activités - Partie 4: Contrôle des intrants des usagers
Ta slovenski standard je istoveten z: prEN 14654-4
ICS:
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
oSIST prEN 14654-4:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 14654-4:2019
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oSIST prEN 14654-4:2019
DRAFT
EUROPEAN STANDARD
prEN 14654-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2019
ICS 93.030
English Version
Drain and sewer systems outside buildings - Management
and control of activities - Part 4: Control of inputs from
users
Réseaux d'évacuation et d'assainissement à l'extérieur Entwässerungssysteme außerhalb von Gebäuden -
des bâtiments - Gestion et contrôle des activités Management und Überwachung von Maßnahmen - Teil
opérationnelles - Partie 4: Contrôle des intrants des 4: Kontrolle von Einleitungen der Nutzer
usagers
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 165.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14654-4:2019 E
worldwide for CEN national Members.
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Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General . 6
5 Integrated sewer system management planning . 7
5.1 Introduction . 7
5.2 Aims of control of inputs from users . 7
6 Preparation of the input control programme . 8
6.1 Introduction . 8
6.2 Review of the inputs control activities planning . 8
6.3 Investigation . 8
6.3.1 Introduction . 8
6.3.2 Review of previous investigations . 8
6.3.3 Further investigations . 9
6.4 Assessment . 9
6.5 Develop the programme . 10
6.5.1 Introduction . 10
6.5.2 Specification of objectives . 10
6.5.3 Developing options . 10
6.5.4 Assess feasibility of solutions . 12
6.5.5 Select optimum solutions . 13
6.5.6 Producing the programme . 13
7 Preparation of the project specification . 13
7.1 Introduction . 13
7.2 Review of the project description and project objectives . 13
7.3 Investigation . 13
7.4 Assessment . 14
7.5 Drafting the project specification. 14
7.5.1 Introduction . 14
7.5.2 Prepare detailed solutions . 14
7.5.3 Assess feasibility of solutions . 15
7.5.4 Select optimal solution . 16
7.5.5 Detailed design of optimal solution . 16
7.5.6 Prepare product specification . 18
7.5.7 Performance indicators . 18
8 Implementation of projects . 18
9 Measurement of conformity . 18
9.1 Measurement methods . 18
9.2 Non-conformities . 19
9.3 Post project appraisal . 19
10 Review of plan and programme . 19
Annex A (normative) Impacts of poorly controlled inputs . 20
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A.1 Introduction. 20
A.2 Structural integrity of the components of the sewer system or the wastewater
treatment plant . 20
A.2.1 Introduction. 20
A.2.2 Chemical attack or corrosion . 20
A.2.3 Mechanical damage . 21
A.3 Function of the drain of sewer system . 21
A.3.1 Introduction. 21
A.3.2 Accumulation of attached deposits . 21
A.3.3 Accumulation of settled deposits . 22
A.3.4 Other obstacles . 22
A.4 Function of mechanical equipment . 22
A.5 Nuisance . 23
A.5.1 Attract vermin . 23
A.5.2 Odour nuisance . 23
A.6 Function of the wastewater treatment plant . 23
A.6.1 Introduction. 23
A.6.2 Substances that cannot be treated . 23
A.6.3 Substances that disrupt or interfere with wastewater treatment processes . 24
A.6.4 Substances that impede the flow in the wastewater treatment plant . 24
A.6.5 Hydraulically overload the wastewater treatment plant . 24
A.7 Environment . 24
A.7.1 General . 24
A.7.2 Impact on the quality of receiving waters . 24
A.7.3 Impact on the quality of sludge . 24
A.8 Health and safety . 25
Annex B (informative) Potential criteria for assessment of inputs . 26
Bibliography . 28
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European foreword
This document (prEN 14654-4:2019) has been prepared by Technical Committee CEN/TC 165
“Wastewater Engineering”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
EN 14654 consists of the following parts, under the general title Drain and sewer systems outside
buildings — Management and control of activities:
— Part 1: General; (the present document)
— Part 2: Rehabilitation
— Part 3: Sewer cleaning
— Part 4: Control of inputs
In drafting this part of this document account has been taken of other available standards, in particular
EN 752, Drain and sewer systems outside buildings, and EN 13508, Investigation and assessment of
drain and sewer systems outside buildings.
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1 Scope
This document establishes requirements for the management and control of activities in drain and
sewer systems outside buildings and specifies requirements for development and implementation of
work programmes, and the selection of techniques.
This document together with EN 14654-1 covers the control of inputs from users
It is applicable to drain and sewer systems from the point where wastewater leaves a building, roof
drainage system, or paved area, to the point where it is discharged into a wastewater treatment plant or
receiving water body.
Drains and sewers below buildings are included provided that they do not form part of the drainage
system of the building.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 752:2017, Drain and sewer systems outside buildings - Sewer system management
prEN 14654-1:2019, Drain and sewer systems outside buildings — Management and control of
operational activities — Part 1: General requirements
EN 16323:2014, Glossary of wastewater engineering terms
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16323:2014, EN 752 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
Note 1 to entry: Certain key definitions from EN 16323:2014 have been repeated below for clarity. The
following additional terms used in this document are defined in EN 16323:2014:
— drain
— sewer system
— receiving water body
— wastewater treatment plant
— sewer
3.1
domestic wastewater
water polluted by the human life, including water discharged from kitchens, laundry rooms, lavatories,
bathrooms, toilets and similar facilities
[SOURCE: EN 16323:2014, 2.1.2.3]
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3.2
foul wastewater
wastewater comprising domestic wastewater and/or industrial wastewater
[SOURCE: EN 16323:2014, 2.1.2.6]
3.3
industrial wastewater
wastewater discharge resulting from any industrial or commercial activity
[SOURCE: EN 16323:2014, 2.1.2.7]
3.4
input
any solid or liquid matter that is discharged into or otherwise enters a drain or sewer system including
wastewater
3.5
non-domestic wastewater
water polluted by industrial, craft or commercial activity
[SOURCE: EN 16323:2014, 2.1.2.5]
3.6
surface water
water from precipitation, which has not seeped into the ground and is discharged to the drain or sewer
system directly from the ground or from exterior building surfaces
[SOURCE: EN 16323:2014, 2.1.1.3]
3.7
user
any individual, domestic or non-domestic entity discharging into a drain or sewer system
3.8
wastewater
water composed of any combination of water discharged from domestic, industrial or commercial
premises, surface run-off and accidentally any sewer infiltration water
[SOURCE: EN 16323:2014, definition 2.3.10.65]
4 General
Foul drain and sewer systems are designed to receive inputs of domestic wastewater and some types of
non-domestic wastewater (see EN 752:2017, 8.2).
Surface water systems are designed only to receive inputs of surface water (see EN 752:2017, 8.2).
Combined drain and sewer systems are designed to receive inputs of domestic wastewater, some types
of non-domestic wastewater and a certain amount of surface water (see EN 752:2017, 8.2).
Inputs of non-domestic wastewater to foul and combined drain and sewer systems are often controlled
by formal agreements or regulations. Inputs of other sources of foul wastewater to foul and combined
drain and sewer systems are not usually subject to these formal controls.
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Controls are sometimes placed on the input of polluted surface water to surface water and combined
drain and sewer systems.
The input of surface water to combined drain and sewer systems is sometimes subject to control to
limit the amount of surface water discharged.
National and local regulations can specify controls on the inputs to drain and sewer systems.
The methods of control available to wastewater utilities depend on national and local regulations.
The control of inputs to drains and sewers can be carried out pro-actively, to prevent problems
occurring, or reactively in response to problems that have occurred.
This European Standard applies the process described in EN 14654-1 for implementing activities to
control of inputs in the integrated drain and sewer system management plan. This document shall be
used in conjunction with EN 14654-1.
National or local regulations or the relevant authority can:
a) prohibit certain inputs to certain types of drain or sewer system (e.g. discharge of surface water to
foul drain or sewer systems or the discharge of foul wastewater to surface water drain or sewer
systems);
b) prohibit inputs that contain certain specific substances (e.g. priority substances and certain other
pollutants according to Annex II of Directive 2008/105/EC);
c) prohibit inputs that contain certain classes of substances (e.g. substances that could block drains or
sewers, substances that could damage the components of the drain or sewer system, or the
treatment process);
d) require some types of input (e.g. industrial wastewater inputs) to be regulated by a permit.
5 Integrated sewer system management planning
5.1 Introduction
An operations and maintenance plan (see EN 752:2017, 6.4.4.3), dealing with control of inputs should
be in place for the drain and sewer system prior to carrying out major programmes. Activities for the
control of inputs can be one aspect of the operations and maintenance plan, which is part of an
integrated sewer system management plan. However, this is not always possible if works are required
urgently (e.g. in response to a sewer failure).
5.2 Aims of control of inputs from users
The aims of input control are to limit any adverse impact of inputs from users on:
a) structural integrity of the components of the sewer system or the wastewater treatment plant;
b) function of the drain or sewer system;
c) function of any mechanical or electrical equipment;
d) function of the wastewater treatment plant;
e) the public, by causing nuisance;
f) the environment.
Criteria for determining the compatibility of inputs on the wastewater system are given in Annex A.
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6 Preparation of the input control programme
6.1 Introduction
The input control programme defines the approach to be taken to the control of each input either
specifically for an individual input or generally for a defined class of inputs.
6.2 Review of the inputs control activities planning
A review should be undertaken of the control of inputs aspects of the operations and maintenance plan
within the integrated sewer system management plan (see EN 752:2017, Clause 6).
6.3 Investigation
6.3.1 Introduction
The investigation shall review whether any inputs to the sewer system are adversely impacting or could
adversely impact the:
a) structural integrity of the components of the sewer system or the wastewater treatment plant;
b) function of the drain or sewer system;
c) function of any mechanical or electrical equipment;
d) function of the wastewater treatment plant;
e) public, by causing nuisance;
f) environment.
The locations of inputs having an adverse impact on the drain or sewer system should be identified
based on:
1) investigation of non-domestic wastewater inputs into the drain and sewer system;
2) inspection of the drain and sewer system;
3) analysis of the causes of performance failures (e.g. sewer blockages);
4) review of the available information which may include the performance of similar systems
elsewhere.
6.3.2 Review of previous investigations
The review should include:
a) drain and sewer system performance information to identify locations where there have been
operational incidents (e.g. sewer blockages) that could have been caused by inputs;
b) existing visual inspection information to identify locations where there has been damage to the
components of the drain or sewer system that could have been caused by inputs;
c) existing visual inspection information to identify locations where settled or attached deposits could
be caused by inputs;
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d) any sewer cleaning programme (see prEN 14654-3:2019) to identify whether the components of
inputs are likely to have been a significant contributory cause of the accumulated deposits;
e) wastewater treatment plant performance information to identify failures that could have been
caused by inputs;
f) pollution incident reports to identify incidents that could have been caused by inputs;
g) industrial wastewater discharge records to identify the potential sources of damaging inputs.
6.3.3 Further investigations
Investigations should be carried out where further information is needed in order to produce the
programme. These investigations can be either proactively in anticipation of an event, or reactively in
response to it.
These can include:
a) visual inspection of drains, sewers (see EN 13508-1) and wastewater treatment plants to identify
damage or deposits;
b) investigation at the locations of sewer blockage incidents to identify whether the components of
inputs continue to be a significant contributory cause of the future blockages;
c) investigation of the contents of blockages in drains, sewers and wastewater treatment plants to
identify the nature and likely sources of the materials;
d) investigation of the causes of any unacceptable pollution resulting from inputs from surface water
outfalls;
e) Investigation of the causes of any unacceptable pollution resulting from inputs from wastewater
treatment plants;
f) Investigation of specific locations:
1) Premises which could give rise to unacceptable inputs (e.g. food service establishments, fuel
stations, hospitals and care homes, campsites);
2) Sources of pollutants or solids that could be discharged into the systems by the users (e.g. car
washing on roads or parking areas, fuel stations, construction sites);
3) Low points where surface water can collect or flood prone locations where users could lift foul
sewer covers to relieve it);
g) Review of pumping times or flows to detect
1) the presence of surface water in a foul wastewater drain;
2) unexpected flows in a surface water or combined drain.
6.4 Assessment
The assessment shall identify the locations where the performance of the system is being or could be
unacceptably affected by inputs to the drain or sewer system.
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Each input can be classified according to a grid that characterizes the nature of the problems
encountered:
— Type 1: problems of industrial, commercial or industrial inputs requiring the installation of
equipment and possibly permits and means of control;
— Type 2: user input problems that require information campaigns and possibly the mobilization of
regulatory power;
— Type 3: Other problem not related to inputs from user.
The need for intervention can be described by an additional code:
a) the input is acceptable in its current state;
b) the input should be improved;
c) the input should be improved urgently in a defined time period.
6.5 Develop the programme
6.5.1 Introduction
A control of inputs programme shall:
— identify optimum frequencies for pro-active control of inputs activities;
— identify optimum frequencies for review of data;
— maintain or reduce the number of reactive control of inputs activities to an acceptable level.
6.5.2 Specification of objectives
The objectives of control of inputs activities should be established in accordance with the aims
described in 5.2. These should be expressed as a performance requirement, for example:
a) to reduce to a specified number, the numbers of blockages of drains and sewers or of mechanical
equipment caused by a specific input; or
b) to reduce the frequency of cleaning activities required to achieve specified performance; or
c) to reduce the number of pollution incidents.
6.5.3 Developing options
6.5.3.1 Introduction
Methods of control can, depending on national or local regulations (see Clause 4) include:
a) Use of regulatory powers (where available);
b) information campaigns to change user behaviour;
c) other solutions.
The nature of the inputs can be only a contributory factor. Where frequent problems occur, or where
the consequences are severe, consideration should be given to the feasibility of carrying out
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rehabilitation works to prevent or reduce the impact of inputs on the performance of the drain and
sewer system.
6.5.3.2 Use of regulatory powers
Depending on national or local regulations, utilities can have regulatory powers. Examples are given
below.
a) To control inputs by requiring certain classes of users (usually industrial wastewater inputs but
also commercial and craft activities wastewater inputs) to have a permit to discharge which limits
the type and quantities of substances that may be discharged. The approach taken can include:
1) emission limit permits – specifying limits on the quantities or concentrations of specified
substances that may be discharged;
2) method based permits – for example specifying the method of pre-treatment that is to be
undertaken prior to discharge;
3) a combination of the above approaches.
b) To prohibit the discharge of certain substance
...
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