CEN/TR 12566-2:2005

Small wastewater treatment systems for up to 50 PT - Part 2: Soil infiltration systems

This document specifies the recommended requirements for soil infiltration systems ranging in size from a single house to 50 PT receiving domestic wastewater from septic tanks manufactured according to the requirements given in EN 12566-1 and prEN 12566-4.
This document gives design parameters, construction details, installation and component requirements for soil infiltration systems.

Kleinkläranlagen für bis zu 50 EW - Teil 2: Bodeninfiltrationssysteme

Petites installations de traitement des eaux usées jusqu'à 50 PTE - Partie 2: Systèmes d'infiltration dans le sol

Le présent document spécifie les exigences recommandées pour les systèmes d'infiltration dans le sol dont la taille varie depuis celle d'une simple maison jusqu'à celle d'installations jusqu'à 50 PTE recevant les eaux usées domestiques de fosses septiques fabriquées selon les exigences indiquées dans l'EN 12566-1 et le prEN 12566-4.
Le présent document fournit des paramètres de conception, des détails de construction, des exigences concernant l'installation et les différents éléments des systèmes d'infiltration dans le sol.

Male čistilne naprave do 50 PE – 2. del: Sistemi za infiltracijo v zemljo

Ta dokument določa priporočene zahteve za sisteme za infiltracijo v tla v velikosti od ene hiše do 50 PE, ki sprejemajo gospodinjsko odpadno vodo iz greznic, izdelanih v skladu z zahtevami standardov EN 12566-1 in prEN 12566-4.
Ta dokument podaja parametre zasnove, podrobnosti konstrukcije ter zahteve za vgradnjo in sestavne dele za sisteme za infiltracijo v tla.

General Information

• Status: Published
• Publication Date: 14-Jun-2005
• ICS: 13.060.30 - Sewage water
• Technical Committee: CEN/TC 165 - Waste water engineering
• Drafting Committee: CEN/TC 165/WG 41 - Small type sewage treatment plants (< 50 inhabitants)
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 15-Jun-2005
• Completion Date: 15-Jun-2005
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Ref Project: SIST-TP CEN/TR 12566-2:2005 - Small wastewater treatment systems for up to 50 PT - Part 2: Soil infiltration systems

Relations

• Child: CEN/TR 12566-5:2008 - Small wastewater treatment systems up to 50 PT - Part 5: Pre-treated Effluent Filtration systems
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2005
0DOHþLVWLOQHQDSUDYHGR3(±GHO6LVWHPL]DLQILOWUDFLMRY]HPOMR
Small wastewater treatment systems for up to 50 PT - Part 2: Soil infiltration systems
Kleinkläranlagen für bis zu 50 EW - Teil 2: Bodeninfiltrationssysteme
Petites installations de traitement des eaux usées jusqu'a 50 PTE - Partie 2: Systemes
d'infiltration dans le sol
Ta slovenski standard je istoveten z: CEN/TR 12566-2:2005
ICS:
13.060.30 Odpadna voda Sewage water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL REPORT
CEN/TR 12566-2
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
June 2005
ICS 13.060.30
English version
Small wastewater treatment systems for up to 50 PT - Part 2:
Soil infiltration systems
Petites installations de traitement des eaux usées jusqu'à Kleinkläranlagen für bis zu 50 EW - Teil 2:
50 PTE - Partie 2: Systèmes d'infiltration dans le sol Bodeninfiltrationssysteme
This Technical Report was approved by CEN on 19 December 2004. It has been drawn up by the Technical Committee CEN/TC 165.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 12566-2:2005: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Introduction.5
1 Scope .6
2 Normative references .6
3 Terms and definitions.6
4 Symbols and abbreviations.8
5 General .8
6 Design parameters.8
7 Components .12
8 General requirements for the installation of septic tanks.14
9 Construction requirements .14
10 Specific construction requirements .15
11 Maintenance .28
Annex A (informative) Preliminary site consideration.29
Annex B (informative) Soil investigations .36
Annex C (informative) Selection of suitable sands.45
Bibliography.49

Foreword
This document (CEN/TR 12566-2:2005) has been prepared by Technical Committee CEN/TC 165 “Wastewater
engineering”, the secretariat of which is held by DIN.
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.
This document is considered as Code of Practice and provides the general requirements for packaged and/or site
assembled treatment plants used for domestic wastewater treatment for a total number of inhabitants and
population equivalents (PT) ≤ 50 PT (see Clause 1).
EN 12566 with the generic title "Small wastewater treatment systems up to 50 PT" consists of the following parts:
 Part 1: Prefabricated septic tanks (specifies the requirements and laboratory test method for prefabricated
septic tank units. Requirements and tests for treatment efficiency are not specified),
 Part 2: Soil infiltration systems (applies for in-situ constructed soil infiltration systems. No treatment
requirements are specified; Technical Report),
 Part 3: Packaged and/or site assembled domestic wastewater treatment plants (specifies the requirements
and laboratory test method used to evaluate packaged wastewater treatment plants, which are required to
treat sewage to a predetermined standard),
 Part 4: Septic tanks built in situ from pre-fabricated kits - Execution standard (in preparation),
 Part 5: Filtration systems (including sand filters) (in preparation),
 Part 6: Test methods for the evaluation of the effectiveness of treatment on users site.
The application of the parts of EN 12566 is shown in the following scheme:
Key
A Domestic wastewater (influent) 2 Infiltration system (into the ground) (see CEN/TR 12566-2;
in preparation)
B Pre-treated wastewater
3 Wastewater treatment plant (see prEN 12566-3)
C Infiltration into the ground
4 Septic tank built in situ (see prEN 12566-4)
D Outlet of treated wastewater (effluent)
5 Filtration systems (see prEN 12566-5)
1 Prefabricated septic tank (see EN 12566-1)
NOTE National regulations may specify different arrangements between the products described in the standards
series EN 12566.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Report: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

Introduction
This document gives guidance for soil infiltration systems which can be used together with small waste water
systems according to EN 12566-1, prEN 12566-3 or prEN 12566-4 in places of use where legally provisions for soil
infiltration systems do not exist.
National forewords of this document may give information on provisions for soil infiltration in the place of use (see
Clause 5).
1 Scope
This document specifies the recommended requirements for soil infiltration systems ranging in size from a single
house to 50 PT receiving domestic wastewater from septic tanks manufactured according to the requirements
given in EN 12566-1 and prEN 12566-4.
This document gives design parameters, construction details, installation and component requirements for soil
infiltration systems.
2 Normative references
The following referenced documents are indispensable for the 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 1085, Waste water treatment – Vocabulary
EN 12566-1, Small wastewater treatment systems for up to 50 PT — Part 1: Prefabricated septic tanks
prEN 12566-4, Small wastewater systems for up to 50 PT — Part 4: Septic tanks assembled in situ from
prefabricated kits
EN 12056-2, Gravity drainage systems inside buildings - Part 2: Sanitary pipework, layout and calculation
EN ISO 10319, Geotextiles – Wide-width tensile test (ISO 10319:1993)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1085 and the following apply.
3.1
biological layer
biological film which grows on the base of the infiltration system or on top of the filter material when pre-treated
effluent infiltrates the subsoil or the filter material
3.2
connection pipe
non-perforated pipe used to connect the septic tank to the distribution chamber
3.3
disposal area
total area of the site where the pre-treated effluent is discharged into the ground using a soil infiltration system
3.4
distribution chamber
chamber allowing even gravity distribution of pre-treated effluent via the distribution pipes
3.5
distribution layer
layer of the system composed of granular fill material in which pre-treated effluent is discharged through infiltration
pipes
3.6
distribution pipe
non-perforated pipe used to connect the distribution chamber to a single infiltration pipe
3.6
dosing chamber
small tank receiving pre-treated effluent and containing a dosing device e.g. a pump, a hydraulic siphon or a tipping
trough, which automatically discharges the desired quantity
3.7
end connection
perforated and non-perforated pipes and fittings that connect the lower ends of any parallel infiltration pipes, to
enable airflow between infiltration pipes. The connecting fittings may incorporate ventilation and access provision.
3.8
filter material
granular inert material, usually sand, placed beneath the distribution layer, the purpose of which is to provide a
degree of filtration to the pre-treated effluent
3.9
geotextile
fabric, which is permeable to liquid and air but prevents solid particles from passing through it and is resistant to
decomposition
3.10
granular fill material
inert material in which the infiltration pipes are placed in the distribution layer
3.11
impermeable film
inert membrane, which is impermeable to liquid
3.12
infiltration
percolation of effluent around the point at which it is discharged
3.13
infiltration bed
wide excavation in which a number of infiltration pipes are placed in parallel and surrounded by fill material
3.14
infiltration pipes
perforated pipes through which the pre-treated effluent is discharged to the infiltration trench or bed
3.15
infiltration system
series of infiltration pipes, placed in either single trenches or one large bed, used to discharge effluent in such a
way that it percolates into the disposal area
3.16
infiltration trench
trench in which a single infiltration pipe is placed and surrounded by fill material and separated from other
infiltration trenches by undisturbed soil
3.17
land drains
surface or subsurface channels for the transportation of rain water. They are used to dewater ground and divert the
natural flow of surface and subsurface water away from infiltration area
3.18
long Term Acceptance Rate
LTAR
amount of pre-treated effluent which the system can infiltrate during its lifetime without water logging or clogging
(l/m /d)
3.19
mesh
fabric, which is permeable to liquid and air but prevents rough solid particles from passing through it and which is
resistant to decomposition. The hole diameters are approximately 1 mm.
3.20
permeability coefficient
k
measure of the percolation ability of the soil (m/d)
3.21
prefilter
device that helps to prevent clogging of infiltration system
3.22
pre-treated effluent
wastewater that has undergone at least primary treatment
3.23
subsoil
unconsolidated material beneath the topsoil and above the bedrock
3.24
topsoil
upper layer of soil
3.25
water table
level below which the soil is saturated with water
3.26
water table level
surface of the groundwater when related to the ground level or other point of reference
4 Symbols and abbreviations
k Darcy's permeability coefficient determined from small tube permeable test (m/d)
k Normalised permeability coefficient determined from falling head percolation test (m/d)
N
k Constant permeability coefficient determined from constant head percolation test (m/d)
C
5 General
Infiltration systems provide a measure of treatment when constructed according to this document or to appropriate
national regulations; their effectiveness is usually not measured.
The systems described are intended to illustrate the main principles of construction and are subject to national
variation. Provisions in the place of use shall be taken into account. The regulatory authorities shall be contacted.
6 Design parameters
6.1 General
To ensure that a sustainable solution is achieved each site shall be assessed (see Annex A and Annex B). The
choice of infiltration system will depend upon the site considerations detailed in 6.2. The preferential order of
systems is:
 Infiltration trench (see 10.2),
 Shallow infiltration bed (see 10.3.1),
 Vertical infiltration bed (see 10.3.2),
 Infiltration mound (see 10.3.3).
Pre-treated effluent discharging to unsuitable sub-soils may result in system failure.
6.2 Site considerations
6.2.1 Climatic conditions
When designing, constructing and locating the soil infiltration system, climati
...

SLOVENSKO SIST-TP CEN/TR 12566-2

TEHNIČNO
september 2005
POROČILO
Male čistilne naprave do 50 PE – 2. del: Sistemi za infiltracijo v zemljo

Small wastewater treatment systems for up to 50 PT –

Part 2: Soil infiltration systems

Petites installations de traitement des eaux usées jusqu'a 50 PTE –

Partie 2: Systemes d'infiltration dans le sol

Kleinkläranlagen für bis zu 50 EW – Teil 2: Bodeninfiltrationssysteme

Referenčna oznaka
ICS 13.060.30 SIST-TP CEN/TR 12566-2:2005 (sl)

Nadaljevanje na straneh II in od 1 do 50

© 2016-05. Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST-TP CEN/TR 12566-2 : 2005
NACIONALNI UVOD
Tehnično poročilo SIST-TP CEN/TR 12566-2 (sl), Male čistilne naprave do 50 PE – 2. del: Sistemi za
infiltracijo v zemljo, 2005, ima status slovenskega tehničnega poročila in je istoveten evropskemu
tehničnemu poročilu CEN/TR 12566-2 (en, de, fr), Small wastewater treatment systems for up to 50 PT
– Part 2: Soil infiltration systems, 2005.

NACIONALNI PREDGOVOR
Evropsko tehnično poročilo CEN/TR 12566-2:2005 je pripravil tehnični odbor Evropskega komiteja za
standardizacijo CEN/TC 165 Odvajanje in čiščenje odpadne vode. Slovensko tehnično poročilo SIST-
TP CEN/TR 12566-2:2005 je prevod evropskega tehničnega poročila CEN/TR 12566-2:2005. V primeru
spora glede besedila slovenskega prevoda v tem tehničnem poročilu je odločilno izvirno evropsko
tehnično poročilo v enem od treh uradnih jezikov CEN. Slovensko izdajo tehničnega poročila je potrdil
Strokovni svet SIST za splošno področje.

Odločitev za izdajo tega standarda je dne julija 2005 sprejel Strokovni svet SIST za splošno področje.

ZVEZA S STANDARDI
S privzemom tega evropskega standarda veljajo za omejeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:

SIST EN 1085 Čiščenje odpadne vode – Slovar
SIST EN 12566-1 Male čistilne naprave do 50 PE – 1. del: Predizdelane greznice
SIST EN 12566-4 Male čistilne naprave do 50 PE – 4. del: Montažne greznice, sestavljene na
mestu vgradnje
SIST EN 12056-2 Težnostni kanalizacijski sistemi v stavbah – 2. del: Sanitarni sistem,
načrtovanje in izračun
SIST EN ISO 10319 Geotekstilije – Natezni preskus na širokih preskušancih (ISO 10319:1993)

OSNOVA ZA IZDAJO STANDARDA
– privzem standardizacijskega dokumenta CEN/TR 12566-2:2005
OPOMBE
– Povsod, kjer se v besedilu dopolnila uporablja izraz "evropsko tehnično poročilo", v SIST-TP
– Nacionalni uvod in nacionalni predgovor nista sestavni del tehničnega poročila.

– Ta nacionalni dokument je istoveten CEN/TR 12566-2:2005 in je objavljen z dovoljenjem

CEN/CENELEC
Upravni center
Avenue Marnix 17
B-1000 Bruselj
This national document is identical with CEN/TR 12566-2:2005 and is published with the
permission of
CEN/CENELEC
Management Centre
Avenue Marnix 17
B -1000 Brussels
II
TEHNIČNO POROČILO CEN/TR 12566-2
TECHNICAL REPORT
RAPPORT TECHNIQUE
TECHNISCHER BERICHT junij 2005

ICS 13.060.30
Slovenska izdaja
Male čistilne naprave do 50 PE – 2. del: Sistemi za infiltracijo v zemljo

Small wastewater treatment Petites installations de traitement Kleinkläranlagen für bis zu 50 EW
systems for up to 50 PT – des eaux usées jusqu'a 50 PTE – - Teil 2: Bodeninfiltrationssysteme
Part 2: Soil infiltration systems Partie 2: Systemes d'infiltration dans
le sol
Ta tehnično poročilo je CEN sprejel 19. decembra 2007. Pripravil ga je tehnični odbor CEN/TC 165.

Člani CEN so nacionalni organi za standarde Avstrije, Belgije, Cipra, Češke republike, Danske, Estonije,
Finske, Francije, Grčije, Irske, Islandije, Italije, Latvije, Litve, Luksemburga, Madžarske, Malte, Nemčije,
Nizozemske, Norveške, Poljske, Portugalske, Slovaške, Slovenije, Španije, Švedske, Švice in
Združenega kraljestva.
CEN
Evropski komite za standardizacijo
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung

Upravni center: rue de Stassart, 36, B-1050 Brussels

© 2005 CEN. Lastnice avtorskih pravic so vse države članice CEN Ref. oznaka: CEN/TR 12566-2:2005 E

SIST-TP CEN/TR 12566-2 : 2005
Vsebina Stran
Predgovor . 4
Uvod . 6
1 Področje uporabe . 7
2 Zveze s standardi . 7
3 Izrazi in definicije . 7
4 Simboli in kratice . 9
5 Splošno . 9
6 Parametri projektiranja . 10
6.1 Splošno . 10
6.2 Pogoji mesta uporabe . 10
6.2.1 Podnebne razmere . 10
6.2.2 Vodna gladina . 10
6.2.3 Lokacija . 10
6.3 Dimenzioniranje . 11
6.4 Parametri vtoka . 13
6.5 Izbira sistema za infiltracijo . 13
7 Sestavni deli . 13
7.1 Splošno . 13
7.2 Cevi . 13
7.2.1 Splošno . 13
7.2.2 Razdelilna cev . 13
7.2.3 Infiltracijska cev . 14
7.3 Zrnati polnilni material . 14
7.4 Geotekstilije in mreža . 14
7.5 Neprepustna obloga . 14
7.6 Sistemi za črpanje odpadne vode . 14
7.7 Dozirni sistem . 15
7.8 Komore . 15
8 Splošne zahteve za vgradnjo greznic . 15
8.1 Splošno . 15
8.2 Prezračevanje . 15
9 Zahteve za konstrukcijo . 15
9.1 Splošno . 15
9.2 Namestitev na strmih mestih uporabe . 15
9.3 Drenaže . 16
9.4 Splošni previdnostni ukrepi za izkopavanja . 16
9.5 Namestitev komor . 16
9.5.1 Splošno . 16
9.5.2 Razdelilna komora . 16
SIST-TP CEN/TR 12566-2 : 2005
9.5.3 Končni priključki . 16
9.6 Pregled infiltracijskih cevi . 16
9.7 Dostop in pregled . 16
9.8 Zasipavanje . 16
9.9 Prekrivanje . 16
9.10 Zdravje in varnost . 17
10 Posebne zahteve za konstrukcijo . 17
10.1 Splošno . 17
10.2 Infiltracijski jarek . 17
10.2.1 Splošno . 17
10.2.2 Izkop jarkov za razdelilno komoro in razdelilne cevi . 17
10.2.3 Izkop infiltracijskih jarkov . 17
10.3 Infiltracijska ležišča . 21
10.3.1 Plitko infiltracijsko ležišče . 21
10.3.2 Vertikalno infiltracijsko ležišče . 23
10.3.3 Infiltracijski nasip . 25
11 Vzdrževanje . 29
11.1 Splošne zahteve . 29
11.2 Komore in cevovod . 29
Dodatek A (informativni): Predhodna obravnava mesta uporabe . 30
Dodatek B (informativni): Raziskava tal . 37
Dodatek C (informativni): Izbira primernega peska . 46
Literatura . 50
SIST-TP CEN/TR 12566-2 : 2005
Predgovor
Ta dokument (CEN/TR 12566-2:2005) je pripravil tehnični odbor CEN/TC 165 Odvajanje in čiščenje
odpadne vode, katerega sekretariat vodi DIN.

Opozoriti je treba na možnost, da so lahko nekateri elementi tega dokumenta predmet patentnih pravic.
CEN ne prevzema odgovornosti za identifikacijo nekaterih ali vseh takih patentnih pravic.

Ta dokument se uporablja kot kodeks ravnanja in določa splošne zahteve za predizdelane in/ali na mestu
postavitve sestavljene čistilne naprave za čiščenje gospodinjskih odpadnih v
...