SIST EN 13508-1:2013
(Main)Investigation and assessment of drain and sewer systems outside buildings - Part 1: General Requirements
Investigation and assessment of drain and sewer systems outside buildings - Part 1: General Requirements
This European Standard is applicable to the investigation and assessment of drain and sewer systems outside buildings. It is applicable to drain and sewer systems, which operate essentially under gravity, from the point where the sewage leaves a building or roof drainage system, or enters a road gully, to the point where it is discharged into a treatment works or receiving water. Drains and sewers below buildings are included provided that they do not form part of the drainage system of the building. This part of this European Standard specifies general requirements for the investigation and assessment of drain and sewer systems outside buildings.
Untersuchung und Beurteilung von Entwässerungssystemen außerhalb von Gebäuden - Teil 1: Allgemeine Anforderungen
Diese Europäische Norm gilt für die Untersuchung und Beurteilung von Entwässerungssystemen außerhalb
von Gebäuden. Sie gilt für Entwässerungssysteme, die hauptsächlich als Freispiegelsysteme betrieben
werden, von dem Punkt, an dem das Abwasser das Gebäude oder die Dachentwässerung verlässt oder in
einen Straßeneinlauf fließt, bis zu dem Punkt, an dem das Abwasser in eine Behandlungsanlage oder einen
Vorfluter eingeleitet wird. Abwasserleitungen und -kanäle unterhalb von Gebäuden sind dabei eingeschlossen,
solange sie nicht Bestandteil der Gebäudeentwässerung sind.
Der vorliegende Teil dieser Europäischen Norm legt allgemeine Anforderungen für die Untersuchung und
Beurteilung von Entwässerungssystemen außerhalb von Gebäuden fest.
Investigation et évaluation des réseaux d'assainissement à l'extérieur des bâtiments - Partie 1: Exigences générales
La présente Norme européenne s’applique à l’investigation et à l’évaluation des réseaux d’évacuation et d’assainissement à l’extérieur des bâtiments. Elle s’applique aux réseaux d’évacuation et d’assainissement, principalement les réseaux gravitaires, à partir du point où les effluents quittent un bâtiment ou un système d’évacuation de toiture, ou pénètrent dans un avaloir de chaussée, jusqu’au point où ils se déversent dans une station d’épuration ou un milieu récepteur aquatique. Les branchements et collecteurs situés sous des bâtiments sont inclus, à condition qu’ils ne fassent pas partie du réseau d’évacuation du bâtiment.
La présente partie de cette norme spécifie les exigences générales relatives à l’investigation et à l’évaluation des réseaux d’évacuation et d’assainissement à l’extérieur des bâtiments.
Ugotavljanje in ocenjevanje stanja drenažnih in kanalizacijskih sistemov zunaj stavb - 1. del: Splošne zahteve
Ta evropski standard velja za ugotavljanje in ocenjevanje stanja drenažnih in kanalizacijskih sistemov zunaj stavb. Velja za drenažne in kanalizacijske sisteme, ki delujejo zlasti s pomočjo gravitacije, od točke, kjer odplake zapustijo stavbo ali strešni drenažni sistem ali vstopijo v cestni odtočni kanal, do točke, kjer se izlivajo v čistilne naprave ali sprejemajoče vodno telo. Zajeti so tudi drenažni in kanalizacijski sistemi, ki ne tvorijo dela drenažnega sistema stavbe. Ta del evropskega standarda določa splošne zahteve za ugotavljanje in ocenjevanje drenažnih in kanalizacijskih sistemov zunaj stavb.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ugotavljanje in ocenjevanje stanja drenažnih in kanalizacijskih sistemov zunaj stavb - 1. del: Splošne zahteveUntersuchung und Beurteilung von Entwässerungssystemen außerhalb von Gebäuden - Teil 1: Allgemeine AnforderungenInvestigation et évaluation des réseaux d'assainissement à l'extérieur des bâtiments - Partie 1: Exigences généralesInvestigation and assessment of drain and sewer systems outside buildings - Part 1: General Requirements93.030Zunanji sistemi za odpadno vodoExternal sewage systems91.140.80Drenažni sistemiDrainage systemsICS:Ta slovenski standard je istoveten z:EN 13508-1:2012SIST EN 13508-1:2013en,de01-december-2013SIST EN 13508-1:2013SLOVENSKI
STANDARDSIST EN 13508-1:20041DGRPHãþD
SIST EN 13508-1:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13508-1
October 2012 ICS 93.030 Supersedes EN 13508-1:2003English Version
Investigation and assessment of drain and sewer systems outside buildings - Part 1: General Requirements
Investigation et évaluation des réseaux d'assainissement à l'extérieur des bâtiments - Partie 1: Exigences générales
Untersuchung und Beurteilung von Entwässerungssystemen außerhalb von Gebäuden - Teil 1: Allgemeine Anforderungen This European Standard was approved by CEN on 18 August 2012.
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
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13508-1:2012: ESIST EN 13508-1:2013
EN 13508-1:2012 (E) 2 Contents Page Foreword .4Introduction .51 Scope .72 Normative references .73 Terms and definitions .74 General .75 Investigation .95.1 Introduction .95.2 Purpose of investigation .95.3 Determine the scope of the investigation . 105.4 Review existing information . 115.5 Update inventory as required . 135.6 Hydraulic investigation . 145.6.1 Introduction . 145.6.2 Flow and water level measurement . 145.6.3 Rainfall measurement . 145.6.4 Hydraulic calculations . 145.6.5 Other techniques . 155.7 Environmental investigation . 165.7.1 Introduction . 165.7.2 Review of inputs quality . 165.7.3 Wastewater quality measurement . 165.7.4 Wastewater quality simulation modelling . 175.7.5 Surface receiving water impact surveys . 175.7.6 Surface receiving water modelling . 175.7.7 Leaktightness testing . 175.7.8 Groundwater quality investigations. 175.7.9 Odour and noise surveys . 185.8 Structural investigation . 185.8.1 Introduction . 185.8.2 Prepare inspection programme . 185.8.3 Visual inspection . 195.8.4 Other techniques . 205.9 Operational investigation . 215.9.1 Introduction . 215.9.2 Review operational activities . 225.9.3 Review events . 225.9.4 Other investigations . 226 Assessment . 226.1 Introduction . 226.2 Performance deficiencies . 246.2.1 Introduction . 246.2.2 Drains and sewers, gullies, manholes and inspection chambers . 246.2.3 Combined sewer overflows and detention tanks . 256.2.4 Pumping stations, rising mains and vacuum mains . 256.2.5 Insufficient hydraulic capacity . 266.3 Consequences of performance deficiencies . 266.3.1 General . 266.3.2 Subsidence . 266.3.3 Flooding . 26SIST EN 13508-1:2013
EN 13508-1:2012 (E) 3 6.3.4 Pollution of groundwater and soil . 266.3.5 Pollution of surface waters. 276.3.6 Decreased treatment efficiency . 276.3.7 Other consequences . 276.4 Causes of performance deficiencies . 276.5 Reporting . 27Annex A (informative)
Sources of additional information . 28A.1 Austria . 28A.2 Denmark . 28A.3 Finland . 28A.4 France . 29A.5 Germany . 29A.6 Netherlands . 30A.7 Norway . 32A.8 Sweden . 32A.9 United Kingdom . 32Bibliography . 33 SIST EN 13508-1:2013
EN 13508-1:2012 (E) 4 Foreword This document (EN 13508-1:2012) 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 April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. 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 13508-1:2003. This European Standard, EN 13508, Investigation and assessment of drain and sewer systems outside buildings, contains the following parts: Part 1: General requirements (the present document) Part 2: Visual inspection coding system Other parts, dealing with other investigation and assessment aspects may be added later. In drafting this document, account has been taken of other available standards, in particular EN 752, 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, 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. SIST EN 13508-1:2013
EN 13508-1:2012 (E) 5
Introduction Drain and sewer systems are part of the overall wastewater system that provides a service to the community.
This can be briefly described as: removal of wastewater from premises for public health and hygienic reasons; prevention of flooding in urbanised areas; protection of the environment. The overall wastewater system has four successive functions: collection; transport;
treatment;
discharge. Drain and sewer systems provide for the collection and transport of wastewater.
Historically, drain and sewer systems were installed because there was a need to remove the polluted water to prevent diseases.
Traditionally, drain and sewer systems were constructed to collect and transport all types of wastewater together, irrespective of the initial source. This led to difficulties in handling the peak flows in times of heavy rainfall and to the introduction of combined sewer overflows, which discharged polluted water to surface receiving waters. Although many drain and sewer systems started out as combined systems there are arguments for considering the separation of foul wastewater and surface water. The pollutant effects are not the same and the separation of effluents allows for the different treatment for each element of wastewater, providing more environmentally friendly solutions.
This concept is included in the approach of integrated sewer system management. EN 752 provides a framework for the design, construction, rehabilitation, maintenance and operation of drain and sewer systems outside buildings. This is illustrated in the upper part of Figure 1. EN 752 is supported by more detailed standards for the investigation, design, construction, organisation and control of drain and sewer systems such as those listed in the lower part of the diagram.
This standard is one of a number of standards which support the general principles set out in EN 752. The relationship between these standards is illustrated in Figure 1.
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EN 13508-1:2012 (E) 6
Figure 1 — Relationship between EN 752 and other drain and sewer standards SIST EN 13508-1:2013
EN 13508-1:2012 (E) 7 1 Scope This European Standard is applicable to the investigation and assessment of drain and sewer systems outside buildings. It is applicable to drain and sewer systems, which operate essentially under gravity, from the point where the sewage leaves a building or roof drainage system, or enters a road gully, to the point where it is discharged into a treatment works or receiving water. Drains and sewers below buildings are included provided that they do not form part of the drainage system of the building. This part of this European Standard specifies general requirements for the investigation and assessment of drain and sewer systems outside buildings. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 752:2008, Drain and sewer systems outside buildings EN 13508-2, Investigation and assessment of drain and sewer systems outside buildings — Part 2: Visual inspection coding system EN 14654 (all parts), Management and control of cleaning operations in drains and sewers
3 Terms and definitions For the purposes of this document, the following term and definition together with those given in EN 752:2008 apply. 3.1 resilience ability of a component or group of components to continue to perform or quickly recover from an endangering incident 4 General EN 752:2008, Clause 6, describes the process for integrated sewer system management. This process involves the integrated planning of the rehabilitation, maintenance and operation of existing drain and sewer systems.
This European Standard specifies general requirements for the investigation and assessment of aspects of the integrated sewer system management procedure (see Figure 2) to establish the condition of drain and sewer systems. This process can be applied to the development of the integrated sewer system management plan in accordance with EN 752:2008, Clause 6, as well as in the development of programmes of work and projects in accordance with EN 14654 (all parts).
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EN 13508-1:2012 (E) 8
Figure 2 — Integrated sewer system management process The investigation and assessment can be used in developing the integrated sewer system management plan which includes the new development plan, rehabilitation plan, operational plan and maintenance plan. It can also be used in the development of any programmes and projects to implement the integrated sewer system management plan (see EN 14654, all parts). The approach can also be applied at different levels of complexity across a sewer system. For example, it can be applied at a strategic level across a large catchment (e.g. a whole city) and then at a more detailed level in the major sub-catchments and also at the still more detailed level of individual components. The performance of the system can be measured in terms of the functional requirements of the system listed in EN 752:2008, 5.1 (for example protection from flooding, protection of surface receiving waters and maintaining the flow etc.). In some cases, it is only possible to determine the performance at one of the strategic or sub-catchment levels of detail (for example protection from flooding). In other cases, performance can be determined at the component level (for example maintaining the flow). The investigation and assessment of a drain and sewer system and its components is a necessary part of the process of the establishment of the condition and the performance of the system. The components can include: a) gravity drains, sewers and ancillary structures such as manholes, inspection chambers, combined sewer overflows, tanks and outfalls; b) pumping installation including rising mains, vacuum mains and associated control and monitoring equipment; c) gullies and associated structures such as grit separators, light liquid separators and grease separators. SIST EN 13508-1:2013
EN 13508-1:2012 (E) 9 5
Investigation 5.1 Introduction The process of investigation of drain and sewer systems is outlined in EN 752:2008, 6.2. This process is summarised in Figure 3. This process involves the investigation of the hydraulic, environmental, structural and operational condition of the system. This should be in an integrated manner as the results from many of the investigations will cover more than one of these aspects.
The stages of the investigation are described in more detail in Figure 3.
Figure 3 — The process for investigation (based on EN 752:2008, Figure 6) 5.2 Purpose of investigation Prior to commencing the investigation, the purpose of the investigation should be established. The purpose of the investigation can include: a) an investigation to establish an overview of the condition and performance of a drain and sewer system in order to produce an integrated sewer system management plan in accordance with EN 752:2008, Clause 6;
b) a more detailed investigation in order to establish a programme of measures to implement the proposals in an integrated sewer system management plan in accordance with EN 14654 (all parts);
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EN 13508-1:2012 (E) 10 c) investigation as part of the development of a specification for works to implement all or part of an integrated sewer system management plan;
d) the investigation of a drain or sewer system following an incident in order to determine the maintenance requirements;
e) an investigation of the resilience of a drain or sewer system to various hazards or threats.
5.3 Determine the scope of the investigation The scope of the investigation should be determined, including: a) the geographical extent of the investigation; b) the level of detail at which the system is to be investigated (e.g. at strategic level of whole catchment, more detailed level of sub-catchment or detailed level of components); c) which components of the system are to be included in the investigation; d) which aspects of condition or performance are to be investigated for example: 1) protection from flooding (see EN 752:2008, 5.1.2); 2) maintainability (see EN 752:2008, 5.1.3); 3) protection of surface receiving waters (see EN 752:2008, 5.1.4);
4) protection of groundwater (see EN 752:2008, 5.1.5); 5) prevention of odours and toxic, explosive and corrosive gases (see EN 752:2008, 5.1.6); 6) prevention of noise and vibration (see EN 752:2008, 5.1.7); 7) sustainable use of products and materials (see EN 752:2008, 5.1.8); 8) sustainable use of energy (see EN 752:2008, 5.1.9); 9) structural integrity and design life (see EN 752:2008, 5.1.10); 10) maintaining the flow (see EN 752:2008, 5.1.11); 11) watertightness (see EN 752:2008, 5.1.12); 12) not endangering adjacent structures and utility services (see EN 752:2008, 5.1.13); 13) inputs quality (see EN 752:2008, 5.1.14). e) the extent to which each aspect of condition or performance is investigated; f) the interactions with other parts of drain and sewer systems;
g) the external influences on the system and its components (e.g. soil conditions, traffic loads); h) the interactions with other infrastructure (e.g. other utility services, urban environment); i) the resilience of the system.
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EN 13508-1:2012 (E) 11 The scope should be set to enable the likelihood and consequences of all significant performance deficiencies to be described. Records of past incidents and any other relevant information should be brought together and a detailed review should be carried out to establish the scope of the investigations.
Past performance can be established from existing records, including: i) records of flooding incidents;
ii) pipe blockage incidents;
iii) sewer collapse incidents;
iv) rising mains failures;
v) disease, injury or fatal incidents to operators;
vi) disease, injury or fatal incidents to members of the public;
vii) sewer damage incidents;
viii) compliance with discharge consents into and out of the system;
ix) closed circuit television (CCTV) survey and visual inspection data;
x) wastewater related odour complaint incidents;
xi) hydraulic performance analysis;
xii) performance of mechanical/electrical equipment;
xiii) results of monitoring, performance and condition of flow control structures;
xiv) sewer surcharge incidents; xv) groundwater contamination incidents.
Information about possible future changes in the systems should also include: new developments; other infrastructure works. The costs and benefits of collecting information and carrying out investigations should be considered, taking into account the known performance problems in the system and any requirements of the relevant authority. 5.4 Review existing information The collection and review of all available relevant information about the sewer system shall be carried out and is the basis from which all other investigations are subsequently planned. This information should include historical records. In addition to the performance information listed in 5.3, examples are: a) inventory, including the items listed in 5.5;
b) relevant permits and legal requirements;
c) previous operational, maintenance, structural and safety measures to overcome the problems and associated costs; SIST EN 13508-1:2013
EN 13508-1:2012 (E) 12 d) nature and quantities of trade effluent;
e) previous inspections;
f) previous hydraulic measurements (flow, depth, velocity); g) results of previous hydraulic calculations or hydraulic models;
h) previous assessments of environmental impact;
i) existing drain and sewer condition data;
j) receiving water quality and use; k) groundwater levels and velocities; l) ground type and conditions including infiltration capacity;
m) groundwater protection zones;
n) previous test information; o) characterisation of wastewater;
p) information on proposed new development or redevelopment within the catchment area; q) records and forecasts of traffic volumes;
r) results of previous investigations. Some of this information can be available from as-constructed drawings.
This information should be assessed to determine what further information is required in order to carry out the investigation.
Before use, the quality of the information should be assessed taking into account whether it is: 1) complete; 2) compatible; 3) accurate; 4) at a suitable scale; 5) consistent; 6) current; 7) credible. Where there is insufficient information, the inventory should first be updated where required (see 5.5) and any other information should then be collected during the hydraulic investigation (see 5.6), environmental investigation (see 5.7), structural investigation (see 5.8), and operational investigation (see 5.9). SIST EN 13508-1:2013
EN 13508-1:2012 (E) 13 5.5 Update inventory as required
The inventory information is used by all the other investigations. Where the review of existing information (see 5.4) concludes that the inventory is incomplete it shall be updated so that a sufficient record of the drain and sewer system is available to carry out the other investigations. After review and updating, the inventory of the system should contain the following information, for example: a) For each drain or sewer system: 1) the type of system (e.g. combined system or separate system); 2) whether the system is a gravity system, a pressure system or a vacuum system. b) For each drain or sewer pipe: 1) the location of the pipe; 2) the depth of cover and invert levels at the upstream and the downstream ends of the pipe; 3) the shape, size (e.g. diameter) and material. c) For each manhole or inspection chamber: 1) the cover level and invert levels; 2) the dimensions and materials; 3) the connecting pipes.
d) For each pumping station; 1) the number and the flow and discharge pressure characteristics of the pumps; 2) the dimensions of the wet well. e) For each other ancillary structure: 1) the dimensions of the structure; 2) the connecting pipes; 3) details of ancillary equipment (e.g. valves, flow controls). The survey method used should reflect the scale and level of the investigation and can include: i) physical surveys (e.g. to determine the dimensions of accessible pipes, chambers and other features); ii) terrestrial survey techniques (e.g. to determine the location and level of the features); iii) global positioning system (GPS) for the position and level of surface features; iv) light detection and ranging (Lidar) is a technique for the determination of the surface profile of the ground from aerial surveys. SIST EN 13508-1:2013
EN 13508-1:2012 (E) 14 5.6 Hydraulic investigation 5.6.1 Introduction The aim of the hydraulic investigation is to establish the hydraulic characteristics of the flow in the drain and sewer system, the available capacity in the system and the extent of any surcharge and flooding.
The investigation techniques include: a) flow and water level measurement; b) rainfall measurement;
c) hydraulic calculations; d) other techniques. 5.6.2 Flow and water level measurement Velocity and depth sensors can be used in drains and sewers to
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