• CI/SfB 12

CI/SfB 12
CERTIFICATE NO. 06/0208
Killarney Plastics Ltd
Ballyspillane Industrial Estate, Killarney,
Co Kerry, Republic of Ireland
Tel: 064 32421 Fax: 064 22686
e-mail: sales@killarneyplastics.com
website: www.killarneyplastics.com
TRI-CEL® Wastewater Treatment
System for Single Dwellings.
The Irish Agrément Board is designated by Government to issue European Technical Approvals.
Irish Agrément Board Certificates establish proof that the certified products are ‘proper materials’ suitable for their
intended use under Irish site conditions, and in accordance with the Building Regulations 1997 to 2006.
The Irish Agrément Board operates in association with
the National Standards Authority of Ireland (NSAI) as the National Member of UEAtc.
PRODUCT DESCRIPTION USE
This Certificate relates to the TRI-CEL® Wastewater The product is for use in wastewater treatment systems
Treatment System for Single Dwellings. The system designed in accordance with BS 6297: 1983 Code of
utilises a Biological Aeration Filter process, to treat practice for design and installation of small sewage
domestic wastewater, from dwellings with a population treatment works and cesspools, and the EPA Wastewater
equivalent of up to six persons. treatment manual – Treatment Systems for Single
Houses 2000, for the collection and treatment of domestic
The unit is manufactured from glass-reinforced plastic
wastewater, including the separation and partial digestion
(GRP), is cylindrical in shape and has three operating
of suspended matter, prior to discharge of the treated
zones.
effluent.
The total tank capacity is circa 4100 litres with a
MANUFACTURING AND MARKETING
treatment capacity of circa 3500 litres. For design
The product is manufactured and marketed by:
loadings and flows, the retention time is in excess of 48
hours.The de-sludging interval is at least one year. Killarney Plastics Ltd., Ballyspillane Industrial Estate
Killarney, Co Kerry, Republic of Ireland.
The life of the GRP tank, when installed and operated in
accordance with the Certificate holder’s instructions, Tel: 064 32421 Fax: 064 22686
should be in excess of 25 years. However, mechanical e-mail: sales@killarneyplastics.com
components, subject to normal wear and tear, will require website: www.killarneyplastics.com
replacement within this time. website: www.tricel.ie
Readers are advised to check that this Certificate has not been withdrawn or superseded by a later issue by contacting
the Irish Agrément Board, NSAI, Glasnevin, Dublin 9 or online at www.irishagrementboard.com/certs.php?no=060208
 Part One / Certification 1
1.1 ASSESSMENT H2 Septic tanks
In the opinion of the Irish Agrément Board (IAB), the
The TRI-CEL® Wastewater Treatment System has
TRI-CEL® Wastewater Treatment System is
been designed for use in wastewater treatment
satisfactory for the purpose defined above, and can
systems, for the collection and treatment of
meet the requirements of the Building Regulations
domestic wastewater, when installed in accordance
1997 to 2006, as indicated in Section 1.2 of this
with the recommendations of BS 6297: 1983 and
Certificate.
the EPA Wastewater treatment manual – Treatment
1.2 BUILDING REGULATIONS 1997 to 2006 Systems for Single Houses 2000.
REQUIREMENT
The quality of effluent from the TRI-CEL®
PART D – MATERIALS AND WORKMANSHIP Wastewater Treatment System exceeds that of
the effluent from a septic tank and can meet the
D1 - The TRI-CEL® Wastewater Treatment System,
Building Regulation requirements.
used in accordance with this Irish Agrément Board
Certificate, can meet the requirements for materials Information on the design capacity, ventilation,
and workmanship. safety and location requirements is given in this
Irish Agrément Certificate. See Part 3 and 4 of this
D3 - The TRI-CEL® Wastewater Treatment System,
certificate.
as certified in this Irish Agrément Board Certificate,
is manufactured from proper materials and is fit for
its intended use. See Part 4 of this Certificate.
PART H - DRAINAGE AND WASTE DISPOSAL
H1 Drainage systems
The TRI-CEL® Wastewater Treatment System is
easily installed and incorporated into soil percolation
systems to meet Building Regulation requirements.
2 Certificate No. 06/0208 / Killarney Plastics Ltd – TRI-CEL® Wastewater Treatment System
 Part Two / Technical Specification and Control Data 2
2.1 PRODUCT DESCRIPTION Zone 3 Treated effluent is displaced from the filter
2.1.1 System Details chamber into the final settlement zone. Here,
The TRI-CEL® Wastewater Treatment System utilises humus solids settle out and form a sludge on the
a Biological Aeration Filter process to treat domestic tank base, which is re-circulated back to Zone 2.
wastewater from dwellings with a population equivalent The effluent is discharged, by gravity, into the outlet
of up to six persons. pipe, and from there, to the percolation area.
The tank is formed in two halves, from glass 2.2 MANUFACTURE
reinforced plastic. 2.2.1 General
An air compressor supplies air to an air bubble diffuser The tank body is manufactured in two halves, by
system in the secondary chamber. The compressor, moulding glass fibres with a cold setting resin.
which is located within an integral chamber at the top of After curing, the two halves are sealed using a
the unit, operates on a continuous basis. The air silicone based sealant and bolted together using
compressor is ventilated through openings in the stainless steel bolts. All internal joints are sealed
manhole cover. The unit operates off a normal with the silicone sealant.
domestic power supply, and is connected to the
dwelling served by a residual current device (RCD). The air compressor housing, access cover and
internal mouldings are moulded separately before
Inlet and outlet pipe connections are provided and being incorporated into the unit.
are clearly labelled.
The diffuser, and internal and external pipe work are
The unit is accessed via the pedestrian duty GRP fitted prior to final water tightness testing. The inlet
manhole cover, designed to sit 50 mm above ground and outlet connections are clearly labelled.
level. The cover is locked in place with a specially
designed key. 2.2.2 Product range
The system is designed to collect domestic
Discharge from the tank is by gravity. wastewater from dwellings having a population
Provision can be made for pumped discharge, by equivalent of up to six persons. System details
incorporating a pump if required. Pumped systems are shown in Table 1.T
shall be designed by a ‘competent person’. Adequate
provision should be made for storage in the event of
pump failure. This is outside the scope of this
Table 1: TRI-CEL® Wastewater Treatment System
certificate.
– basic information
2.1.2 Treatment
Treatment Capacity 3540 litres
Treatment is carried out in three phases, as follows:
Primary treatment zone 1690 litres
Zone 1 Domestic wastewater enters the primary Secondary treatment zone 1200 litres
settlement zone through the inlet pipe. Heavy solids
sink towards the base of the chamber, where they are Final settlement zone 650 litres
retained, until the tank is de-sludged. Lighter debris and Design population 6 PE
grease rise to the surface to form a crust. The Overall width 1640 mm
remaining effluent is displaced from the primary zone Overall length 2600 mm
into the submerged media/activated sludge section
Total Height 1950 mm
(Zone 2).
Weight (empty)* 300 Kg
Zone 2 As the supernatant liquor passes through the
Design flow rate 1200 litres/day
submerged media in the filter chamber, it is
biodegraded by microorganisms, which develop and BOD load 0.36 Kg/day
grow in suspension on the bio-media. These naturally Inlet invert to base 1350 mm
occurring organisms utilise the organic material in the Outlet invert to base 1250 mm
effluent as a food source, thus reducing the Ground level to inlet invert level 500 mm
Biochemical Oxygen Demand. In order to achieve this,
Air blower motor rating 60 watts (minimum)
the organisms require an adequate supply of oxygen.
This is provided by aerating the filter chamber via the De-sludge period 1 year minimum
air diffuser arrangement. Excess microorganisms are Thickness 6 mm (minimum)
shed from the media as solid particles, known as Retention time (design case) 70 hours
humus.
* allow 400 Kg for lifting purpose.
3 Certificate No. 06/0208 / Killarney Plastics Ltd – TRI-CEL® Wastewater Treatment System
 Overall tank dimensions 2600mm long x 1640mm wide x 1950 high.
Figure 1: Section through Tricel Unit
Figure 2: Tank installation details
4 Certificate No. 06/0208 / Killarney Plastics Ltd – TRI-CEL® Wastewater Treatment System
 Ancillary items incorporating the number of this Certificate.
• Marpak Filter media 2.4 INSTALLATION
2.4.1 General
• Joint sealant (silicone)
A ‘competent person’, e.g. an appropriately
• Electrical control panel, float switch and alarm. qualified and experienced engineer, shall conduct a
site suitability assessment. Based on this
• 110 mm uPVC inlet and outlet sockets to BS
assessment, the ‘competent person’ should design
4660: 2000 Thermoplastics ancillary fittings of
and supervise installation and commissioning of the
nominal sizes 110 and 160 for below ground
wastewater treatment system including all relevant
gravity drainage and sewage
drainage pipe work and connections, vent pipes,
• electrical cable glands manholes, inspection chambers, distribution box,
percolation areas and fencing.
• internal pipe work PVC
The ‘competent person’ should ensure that all
• Quartz air diffusers
aspects of installation are in accordance with
• Air compressor 60 watt.
• the Building Regulations
All components in contact with effluent are made of
• the conditions of planning e.g. unit loading
stainless steel, uPVC or glass reinforced plastic.
remains as per design, percolation trench
Quality control properties and water levels are as specified in
The Certificate holder operates a quality the planning submission and
management system and continuous quality control
• Cl. 2.4.and Part 3 of this Certificate, and ensure
is exercised during manufacture. Quality checks
that ground conditions are adequate.
include barcol hardness test, resin glass ratio,
flexural and tensile testing, tank wall thickness, 2.4.2 Certificate Holder’s Installation Policy
visual inspection and water tightness testing. It is Killarney Plastics Ltd’s policy to
a) deliver each unit to site and supervise off
Killarney Plastics Ltd operates a quality
loading;
management system in accordance with
b) supply detailed installation instructions;
IS EN ISO 9001: 2000 Quality Management
c) commission all units before use.
Systems. Requirements.
2.3 DELIVERY, STORAGE AND MARKING Installation (including electrical wiring of control
Killarney Plastics Ltd delivers the unit to site. The panel and air compressor) shall be carried out by
unit shall be lifted with certified slings in accordance ‘competent persons’ in accordance with the
with the Certificate holder’s instructions. Off loading installation instructions provided (see Cl 2.4.3).
shall be carefully supervised and lifting equipment
shall be selected taking into account the unit weight, 2.4.3 Electrical Works
dimensions and the distance of lift required (see Electrical connections shall be strictly in accordance
Table 1). All lifting equipment and procedures shall with the Certificate holder’s instructions, ET101:
comply with the requirements of the Safety, Health National Rules for Electrical Installations (current
and Welfare at Work Act 2005. The Certificate version) and ET 207: Guide to the National Rules
holder’s instructions shall be followed to avoid for Electrical Installations As Applicable To Domestic
damage to the tank during off-loading and & Similar Installations (current version), published
installation. by the Electro-Technical Council of Ireland (ETCI). A
‘competent person’, using materials suitable for
All works associated with the excavation and
the purpose (i.e. a four core + earth SWA cable)
access of it, must be fully in accordance with best
complete with earth), shall carry out electrical
practice and all relevant statutory requirements.
connections, from the mains supply board through a
The tank should be stored upright, on ground which Residual Current Device (RCD).
is level and free of sharp objects, with the cover in
Electrical cables shall be protected from accidental
place to prevent ingress of water.
damage in accordance with ETCI requirements. It is
Each unit bears a unique serial number, for recommended that the control panel is clearly
traceability purposes. This is located on an visible from a suitable location within the house.
identification plate in the turret. The Certificate
2.4.4 Site Works
holder’s details, model type and population
The excavation shall be of sufficient size to permit
equivalent capacity, are listed on the cover, such
placement of the unit and back filling and to allow
that all are clearly visible once installation is
for timbering and sheeting as necessary to meet the
complete.
requirements of The Safety, Health and Welfare at
The tank is supplied with full installation instructions Work Act, 2005. There should be sufficient area on
and is labelled with the IAB identification Mark site to permit excavation, dumping of excess spoil,
5 Certificate No. 06/0208 / Killarney Plastics Ltd – TRI-CEL® Wastewater Treatment System
 backfilling, handling and installation, without causing Adequate provision should be made for access,
damage to the unit or the ancillary equipment. inspection and maintenance, in the drainage system
upstream and downstream of the unit, through the
It is essential to prevent damage due to
provision of manholes, distribution chambers etc.
superimposed loading, from vehicles or site traffic.
A suitable fence shall be erected around the unit to Adequate provision shall be made for ventilation,
restrict loading. The distance between the fence to ensure that noxious odours and dangerous
and the unit should be equal to or greater than the gases can escape.
depth of excavation for the unit.
2.4.6 Health and Safety
Care shall be taken to prevent accidental damage Excavation, placing and backfilling should be
arising from blows from tools, or concentrated carried out strictly in accordance with the
loads on the unit during installation. requirements of the Safety, Health and Welfare at
Work Act 2005 and all other relevant legislative
Similarly, sharp corners or edges of bricks and
requirements.
stones shall be kept clear of the unit. This shall be
borne in mind when back filling, as the resultant 2.4.7 Procedure
load of a sharp object could fracture the unit. a) Equipment and materials:
The tank should not be lifted if it contains water. It is recommended that all plant and materials
necessary for the installation should be on site
2.4.5 Design
before excavation commences.
The potential suitability of a site, for the installation
of such a system, shall be assessed using the b) Tank Installation – dry site
methodology outlined in the EPA Wastewater A dry site is defined as one where the local water
treatment manual – Treatment Systems for Single table never rises above the base of the treatment
Houses 2000. The ground water protection unit.
responses set out in ‘Groundwater Protection
The tanks shall be installed as follows:
Responses for on-site Wastewater Systems for
Single Houses’ published by EPA/DoELG/GSI 1. Dig a hole circa 2.9 x 2.2m in plan. The unit shall
(2001) should be used in the desk study be installed at the required depth to
assessment of the site, to give an early indication of accommodate incoming drainage pipes. Remove
the suitability of the site for such a system. any soft spots or boulders from the base of the
excavation. A level graded base is then formed
The system should only be installed where a
using sand blinding.
‘competent person’ determines the ground
conditions, and the water table levels, to be 2. A foundation of semi-dry concrete is laid and
adequate to support the tank, and to provide for levelled. The concrete shall be of sufficient grade
disposal of the effluent in accordance with and thickness (minimum 150 mm and
relevant regulations. The system should not be grade 25 N) to ensure that the unit is fully
installed in unsuitable ground conditions. supported with due regard to subsoil conditions
and loads imposed by the unit. Care shall be
Where poor ground conditions prevail, e.g. soft
taken to eliminate voids.
ground or shrinking clay, further advice must be
sought from a ‘competent person’, to establish if 3. The tank is lifted into position using slings in
the ground is adequate to support the tank and accordance with the Certificate holder’s
prevent differential settlement. instructions. Care should be taken to prevent
damage to external flanges or pipe work and to
Good ground working practice shall be followed,
ensure correct orientation of the inlet and outlet
particularly with regard to the gradient on drainage
pipe work.
pipe runs. The inlet pipe should have a gradient of
between 1:40 and 1:60. The outfall pipe should 4. The concrete is haunched up around the base of
have a final gradient of between 1:70 and 1:200. the unit, ensuring the feet are embedded, the top
of the tank is level and that all connections line
Storm water run-off e.g. from roofs or paved areas
up.
shall be excluded from the system.
5 As backfilling progresses, the unit is
The unit shall not be installed in areas liable to
progressively filled with water.
localised flooding, unless adequate additional
protection is provided in accordance with the 6. The excavation is then backfilled to above the
Certificate holder’s instructions. joint, with a minimum of 200 mm surround
(G25N concrete).
The thickness and strength of concrete surround
shall be selected to suit the ground conditions, 7 The backfilled concrete shall be carefully
imposed loads etc., for the design life of the unit. compacted around the unit, to ensure transfer of
Minimum requirements are given in this certificate. ground loads and to prevent stress
6 Certificate No. 06/0208 / Killarney Plastics Ltd – TRI-CEL® Wastewater Treatment System
 concentrations. Vibrating pokers shall not be
used as these may damage the tank unit. Table 2: Minimum Separation Distance (m)
8 The reminder of the excavation is then backfilled,
with suitable selected self-compacting pea gravel Unit Irrigation Area
or suitable granular material, (compaction factor
of 0.2 or less), to the underside of pipe work Dwelling served 71 103
connections, ensuring the connections remained Adjacent dwelling 71 103
exposed.
Wall 31 3
c) Additional requirements for wet sites
A wet site is defined as one where the local Road 41 4
water table can rise above the base of the Site boundary 31 3
treatment unit. Installation in a wet site may be
precluded by site considerations in relation to Potable water source 10 30-1002
effluent disposal. Water course 10 10
9. A 250 mm hardcore sub-base is laid, Lake 50 50
compacted and levelled.
1. The depth of excavation to accommodate the unit shall be taken
10.The excavation is kept dry by pumping excess into account when determining this distance. The separation
water using a site pump/sump hole/suction hose distance should be such that the excavation
arrangement. De-watering should be continued does not undermine adjacent buildings, roads or walls.
for as long as necessary and at least until the This distance should be not less than 1.5 times the excavation
concrete has set. depth.
11. The excavation is then lined with a continuous 2. The separation distance should be not less than 30 metres
layer of 1200 gauge polyethylene sheet. The except in the case of very free draining soils or gravels, where a
grade and thickness of the concrete base should minimum distance of 40 metres should be maintained. The
be designed to suit site conditions (minimum irrigation area should be down hill of any nearby well. Where this is
250 thick, grade 25 N). not possible, a separation distance of at least 100 metres shall
12.The unit shall be installed and the excavation apply. For further details see Ground Water Protection Responses
backfilled generally in accordance with the for On-Site Waste Water Systems for Single Houses published by
requirements for dry sites. However, the EPA/DoELG/GSI (2001).
excavation shall be backfilled with concrete to 3. These minimum permissible distances are for guidance only. A
approx 300 mm below ground level. Allowance ‘Competent Person’ should assess each site on its own merits.
shall be made for flexible joints at pipe However, where the site permits, irrigation areas should be located
connections where necessary. at greater separation distances from the dwelling. Also where
d) Drainage Connections possible on sloping sites, the irrigation area should be down slope
The tank is provided, at the inlet and outlet, with from the dwelling.
110mm uPVC pipes connections to BS 4660.
These should be connected, via a flexible De-sludging should be carried out by a licensed
connection to allow for differential movement, operator using a de-sludging tanker, which requires
(300mm length of pipe with flexible joints), to the access to within 30m of the unit. The minimum
drainage system. Suitable adapters shall be separation distances given in Table 2 apply.
used for connection to other types of pipe work.
2.6 TREATED WASTEWATER DISPOSAL
e) Ducting 2.6.1 General Principles
A 100 mm uPVC duct should be laid from the The unit produces an effluent which is more easily
marked connection point on the unit to the absorbed into soil strata than septic tank effluent.
power supply. There are two methods used for the disposal of
treated wastewater i.e.:
f) Completion of backfilling
When connections to drainage pipe work are a) Sub-surface irrigation, or
complete and ducting in place, continue
b) Raised percolation bed.
backfilling, terminating 180mm below ground
level. The remaining backfilling should be 2.6.2 Site Suitability Assessment
completed to ground level, using selected non- A ‘competent person’, as defined by the
angular excavated material or topsoil. appropriate Authority, should undertake the site
suitability assessment, and choice of disposal
2.5 LOCATION
method (see Cl 2.4.5).
The units should be sited so that adequate access
is available for safe installation, subsequent The assessment shall include a detailed visual
maintenance and de-sludging of the unit. inspection of the site, inspection of the trial hole for
7 Certificate No. 06/0208 / Killarney Plastics Ltd – TRI-CEL® Wastewater Treatment System
 Geotextile
fabric
Distribution
drains
450
150 (min.)
150
20 to 30mm diameter
2m 100
washed stone
250
2.45m
600 to 1200 Top soil
as per EPA and landscaping
Guidelines
Filter gravel
or permeable soil
Water table
or permeable bedrock
Figure 3: Raised bed percolation trench
Top soil
and landscaping 300
Geotextile fabric 150
Distribution drains 100
20 to 30mm diameter 250
washed stone
Filter gravel
or permeable soil
600 to 1200 (min.)
as per EPA guidelines
Water table
or permeable bedrock
Figure 4: Percolation trench
soil profile, depth of water table, percolation value, in Table 3. Treated wastewater is discharged from
(e.g. Standard ‘T/P’ test), together with local the unit by gravity or by pumping if a raised bed
knowledge of the area. From this information it facility is required (See Cl 2.1.1).
should be possible to ascertain the suitability of the
site and the size and type of percolation area 2.6.3 Sub-Surface percolation