HomeMy WebLinkAbout2660101 - F.I. Received Doc. - Soil Characterisation & Site Suitability Assessment report
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SOIL CHARACTERISATION AND SITE SUITABILITY ASSESSMENT REPORT TE REF: 26/ 369 TE
BERNARD DOHERTY
DRUMLANDRICK
CASTLEBLANEY
CO. MONAGHAN
A75 F635
IN ACCORDANCE WITH
EPA CODE OF PRACTICE
WASTEWATER TREATMENT AND DISPOSAL
SYSTEMS SERVING SINGLE HOUSES 2021
Traynor Environmental Ltd
Belturbet Business Park, Creeny, Belturbet
Co. Cavan
Tel: +353 49 9522236
Fax: +353 49 9522808
Web: www.traynorenvironmental.com
RECEIVED: 26/06/2026
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SITE CHARACTERISATION FORM FOR AN ON-SITE WASTEWATER TREATMENT SYSTEM
CONTENTS
1.0 GENERAL DETAILS
2.0 GENERAL DETAILS
3.0 ON SITE ASSESSMENT
3.1 VISUAL ASSESSMENT
3.2 TRIAL HOLE ASSESSMENT
3.3a Subsurface Percolation Test for Subsoil
Step 1 Test Hole Preparation
Step 2 Pre-Soaking Test Holes
Step 3 Measuring T100
Step 4 Standard Method (where T100 ≤ 210min)
Step 5 Modified Method (where T100 > 210min)
3.3bSurface Percolation for Soil
Step 1 Test Hole Preparation
Step 2 Pre-Soaking Test Holes
Step 3 Measuring T100
Step 4 Standard Method (where T100 ≤ 210min)
Step 5 Modified Method (where T100 > 210min)
4.0 CONCLUSIONS OF SITE CHARACTERISATION
5.0 RECOMMENDATION
6.0 TREATMENT SYSTEM DESIGN DETAILS
7.0 SITE ASSESSORS DETAILS
8.0 PHOTOGRAPHS OF THE SITE
9.0 EPA/FAS CERTIFICATE
10.0 INSURANCE DETAILS.
RECEIVED: 26/06/2026
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1.0 GENERAL DETAILS (From planning application)
Name(S) Bernard Doherty
Address of Correspondance
Site Location and Townland
C/o Smith & Associate Architects
Hall Street,
Kingscourt,
Co. Cavan
A82 D1H7
Drumlandrick,
Castleblaney,
Co. Monaghan.
A75 F635
Number of Bedrooms 3 Maximum Number of Residents: 5
Comments on population equivalent
5 PE is the maximum capacity of the dwelling
Proposed Water Supply:
Mains: Private Well/Borehole Group Well/Borehole
2.0 GENERAL DETAILS (From planning application)
Soil Type, (Specify Type): Soil Association 29
Acid Brown Earths (75%), Interdrumlin Peat & Peaty Gleys (25%)
Subsoil, (Specify Type): Sandstone and shale till (Lower Palaeozoic)
Bedrock Type: Late Ordovician-Silurian deep marine greywacke, mudstone (Longford-Down)
Aquifer Category: Regionally Important Locally Important Poor
Vulnerability: Extreme High Moderate Low
Groundwater Body: IEGBNI_NB_G_019 Status Not at Risk
Name of Public/Group Scheme Water Supply within 1km: Unknown
Source Protection
Area:
ZOC n/a SI n/a SO n/a Groundwater Protection
Response:
R1
Presence of Significant sites
(Archaeological, natural and historical): None evident within the locality
Past experience in the area: Variable percolation characteristics of the topsoil and subsoil
materials.
R1 = Acceptable subject to normal good practice. Site may be suitable for discharge to ground, if the minimum depths are met
on the site and if there exists suitable percolation. As the soil type in the area is Acid Brown Earths (75% of the land area), and
as the area is mapped as ‘High’ Vulnerability. Groundwater as a resource will be at risk if the minimum depths required are
not achieved on the site, or if the percolation rate is too rapid. Older wells in the area may also be at risk, if the minimu m
separation distances are not adhered to. Groundwater and wells are therefore the main targets, following the desk study.
Given the response and the aquifer type, the site is potentially suitable for a conventional septic tank system if the minimu m
depths required are met on the site, if the minimum separation distances can be met, and if the percolation rate is adequate.
____________________________________________________________________________________
1This figure of 5 people refers to the potential 5 people maximum that will stay at the proposed dwelling at any one time.
RECEIVED: 26/06/2026
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3.0 ON-SITE ASSESSMENT
3.1 Visual Assessment
Landscape Position Relatively Flat
Slope Steep <1:5 Shallow 1.5 to 1.20 Relatively Flat
Slope Comment Sloping in South direction
Surface features within a minimum of 250 metres (Distances to features should be noted in metres)
Houses
Existing house located >10m North from the proposed percolation area (ppa).
Neighbouring dwellings located 120m & 220m East & 180m & 230m West
from the ppa.
Existing Land Uses Agricultural Grassland
Vegetation Indicators Grass is the predominant vegetation throughout the site.
Groundwater Flow Directions South Direction
Ground Condition Ground conditions are best described as dry and firm throught -out the site in
the ppa.
Site Boundaries Hedge located to the South from the ppa. Field to the North & East from the
ppa.
Roads Located road located >5m south from the ppa.
Outcrops (Bedrock and/or
subsoil) No outcropping rock evident within the locality.
Surface water ponding
No surface water ponding evident in the ppa when examined on 16.06.26. It
must be noted that weather conditions prior to the site assessment taking
place was generally mild conditions.
Lakes None occur within 50m of the ppa.
Beaches/Shellfish Areas None occur within 200m of the ppa.
Wetlands None occur within 200m of the ppa.
Karst Features None occur within 200m of the ppa.
Watercourses/Streams None occur within 10m of the ppa.
Drainage Ditches None occur within 10m of the ppa.
Springs It is proposed to bore a new well on site, which will be located at least 30m up-
gradient from the ppa; this will therefore be outside the minimum separation
distances of the Groundwater Protection Responses of GSI/EPA/DoELG and the
EPA Code of Practice (2021). As all the wells in the locality will therefore meet
the required separation distances of the Groundwater Protection Responses of RECEIVED: 26/06/2026
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GSI/EPA/DoELG and the EPA Code of Practice (2021), none are deemed to be
at risk from the proposed polishing filter’s installation.
As all the wells in the locality will therefore meet the required separation
distances of the Groundwater Protection Responses of GSI/EPA/DoELG and
the EPA Code of Practice (2021), none are deemed to be at risk from the
proposed polishing filter’s installation.
Integrate the information above in order to comment on:
1. The potential suitability of the site:
The site still seems suitable for discharge to ground.
2. Potential targets at risk:
Following the desk study surface water was thought not to be at risk; this was corroborated during the visual
assessment.
There appears to be few issues with respect to impermeability. From this, surface water does not seem to be a
potential target,
Groundwater is still a target following the visual assessment, unless the minimum depths required are met on
the site and there exists adequate percolation.
3. The suitability of the site to treat the wastewater:
Following the visual assessment, it is seen that all appropriate separation distances can be met and the site
seems well drained, and pending confirmation of the presence of adequate depths of unsaturated soil and
subsoil within the percolation area, as well as sufficient percolation rates under the site, the site should be
suitable for treating wastewater adequately.
Existing dwelling on site
RECEIVED: 26/06/2026
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Sketch of site showing measurement to Trial Hole location and Percolation test Hole locations, wells
and direction of ground water flow, proposed house (incl. distances from boundaries) adjacent
houses, watercourses, significant sites and other features. N orth point should always be included.
SITE LAYOUT DRAWING SHOWING TEST HOLE LOCATIONS
Groundwater Flow
Direction
Approximate Location of Trial Hole & Percolation
Test Holes Examined on 16.06.2026
.19
RECEIVED: 26/06/2026
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3.2 Trial Hole
Should be a minimum 2.10m deep
Depth of Trial Hole 1.80m BGL
Depth from Ground Surface to
bedrock (m) if Present
None
Encountered
Depth from Ground Surface to
Water Table (m) if Present 0.60m BGL
Depth of water ingress None
Encountered Rock Type if Present None
Encountered
Date and Time of
Excavation 14.06.2026 10.00 Date and Time of
Examination 16.06.2026 11.10
Depth of
Subsurface
& Surface
Soil/Subsoil
Texture
Classification
Plasticity
and
Dilatancy
Soil
Structure
Density
Compactness Colour Preferential
Flowpaths
0.1m Depth of Silt/Clay Ribbons Crumb Medium Brown Silt/Clay
0.2m Surface 30.30.40
0.3m Test 2,2,2Threads
0.4m
0.5m Depth of Clay intermixed Ribbons Blocky Medium Brown
0.6m
Subsurface
Test With stone 70.70.80
0.7m 2,3,3Threads
0.8m
0.9m
1.0m
1.1m
1.2m
1.3m
1.4m
1.5m
1.6m
1.7m GWT GWT GWT GWT GWT GWT
1.8m
1.9m BEDROCK BEDROCK BEDROCK BEDROCK BEDROCK BEDROCK
2.0m
2.1m
2.2m
EVALUATION:
Weather conditions: Mild
According To The Flowchart For Describing Subsoil’s based on BS5930:1999, the subsoil is best described as Clay
intermixed with stone
Groundwater was encountered in the trial hole at 1.60m BGL. Bedrock was encountered in the trial hole at
1.80m BGL.
Likely Subsurface Percolation
Value:
<50.00
min /25mm
*Note: Depth of percolation test holes should be indicated
on log above (Enter Subsurface & Surface Depths as
appropriate)
* See Appendix E for BS5930 Classification
** 3 samples to be tested
*** All signs of mottling should be recorded.
Likely Surface Percolation
Value:
<50.00
min /25mm RECEIVED: 26/06/2026
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3.3a Subsurface Percolation Test for Subsoil
Step 1 Test Hole Preparation
Percolation Test Hole 1 2 3
Depth from ground surface
to top of hole (mm) (A): 150 150 150
Depth from ground surface
to base of hole (mm) (B): 550 550 550
Depth of hole (mm) (B-A): 400 400 400
Dimensions of hole [length
x breadth (mm)]: 300 x 300 300 x 300 300 x 300
Step 2 Pre-Soaking Test Holes
Pre-soak
start
Date 15.06.2026 15.06.2026
15.06.2026
Time 12.05 12.06 12.08
2nd pre-soak
start
Date 15.06.2026
15.06.2026
15.06.2026
Time 18.50 18.51 18.52
Each hole should be pre-soaked twice before the test is carried out. Each hole should be empty before
refilling.
Step 3 Measuring T100
Percolation Test Hole 1 2 3
Date of Test 16.06.2026 16.06.2026 16.06.2026
Time Filled to 400mm 11.10 11.11 11.13
Time Water Level at
300mm 13.19 13.31 13.38
Time to drop 100mm (T100) 129.00 140.00 145.00
Average T100 138.00
If T100 >480mins then Subsurface Percolation value >120 – site unsuitable for discharge to ground
If T100 ≤ 210mins then go to Step 4
If T100 ≥ 210mins then go to Step 5 RECEIVED: 26/06/2026
9
Step 4 Standard Method (where T100 ≤ 210min)
Percolation
Test Hole
1 2 3
Fill No.
Start
Time at
300mm
Finish
Time at
200mm
∆t
(min)
Start
Time at
300mm
Finish
Time at
200mm
∆t
(min)
Start
Time at
300mm
Finish
Time at
200mm
∆t (min)
1 13.20 15.36 136.00 13.32 16.00 148.00 13.39 16.14 155.00
2 15.37 18.04 147.00 16.01 18.41 160.00 16.15 19.04 169.00
3 18.05 20.48 163.00 18.42 21.34 172.00 19.05 22.17 192.00
Average ∆t 148.67 160.00 172.00
Average ∆t/4 =
[Hole No. 1]
37.17
Average ∆t/4 =
[Hole No. 2]
40.00
Average ∆t/4 =
[Hole No. 2]
43.00
Result of Test: Subsurface
Percolation Value:
40.06 min/25mm
Result of Test: Subsurface Percolation Value = 40.06min/25mm.
Comments
Average Percolation Characteristics of the Subsoil Material.
RECEIVED: 26/06/2026
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3.3bSurface Percolation for Soil
Step 1 Test Hole Preparation
Percolation Test Hole 1 2 3
Depth from ground surface
to top of hole (mm) (A): 0 0 0
Depth from ground surface
to base of hole (mm) (B): 400 400 400
Depth of hole (mm) (B-A): 400 400 400
Dimensions of hole [length x
breadth (mm)]: 300 x 300 300 x 300 300 x 300
Step 2 Pre-Soaking Test Holes
Pre-soak
start
Date 15.06.2026 15.06.2026
15.06.2026
Time 12.09 12.11 12.12
2nd pre-soak
start
Date 15.06.2026 15.06.2026
15.06.2026
Time 18.53 18.54 18.56
Each hole should be pre-soaked twice before the test is carried out. Each hole should be empty before
refilling.
Step 3 Measuring T100
Percolation Test Hole 1 2 3
Date of Test 16.06.2026 16.06.2026 16.06.2026
Time Filled to 400mm 11.14 11.15 11.16
Time Water Level at
300mm 13.02 12.55 12.52
Time to drop 100mm
(T100) 108.00 100.00 96.00
Average T100 101.33
If T100 >480 minutes then Surface Percolation value >90 – site unsuitable for discharge to ground
If T100 ≤ 210mins then go to Step 4
If T100 ≥ 210mins then go to Step 5
RECEIVED: 26/06/2026
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Step 4 Standard Method (where T100 ≤ 210min)
Percolation
Test Hole
1 2 3
Fill No.
Start
Time at
300mm
Finish
Time at
200mm
∆t
(min)
Start
Time at
300mm
Finish
Time at
200mm
∆t
(min)
Start
Time at
300mm
Finish
Time at
200mm
∆t (min)
1 13.03 14.58 115.00 12.56 14.41 105.00 12.53 14.34 101.00
2 14.59 16.58 119.00 14.42 16.33 111.00 14.35 16.23 108.00
3 16.59 19.07 128.00 16.34 18.35 121.00 16.24 18.21 117.00
Average ∆t 120.67 112.33 108.67
Average ∆t/4 =
[Hole No. 1]
30.17
Average ∆t/4 =
[Hole No. 2]
28.08
Average ∆t/4 =
[Hole No. 2]
27.17
Result of Test : Surface Percolation
Value
28.47 min/25mm
Result of Test: Surface Percolation Value = 28.47.28min/25mm.
Comments
Average Percolation Characteristics of the Topsoil Material.
RECEIVED: 26/06/2026
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4.0 CONCLUSIONS of SITE CHARACTERISATION:
Integrate the information from the desk study and on -site assessment (i.e. visual assessment, trial hole and
percolation tests) above and conclude the type of system(s) that is (are) appropriate. This information is also used
to choose the optimum final disposal route of the treated wastewater.
Slope of Proposed Infiltration/treatment area 1.200
Are all minimum separation distance met? Yes
Depth of unsaturated soil and/or subsoil beneath invert of gravel
(or drip tubing in the case of drip dispersal system)
0.90m
Percolation test results: Surface: 28.47min/25mm Sub-surface: 40.06 min/25mm
Not suitable for Development Suitable for Development
Identify all suitable options Discharge Route
1. Septic tank System (Septic tank and percolation area)
(Chapter 7)
Groundwater
2. Secondary Treatment System (Chapters 8 and 9) and soil
polishing filter (Section 10.1)
3. Tertiary Treatment System and Infiltration/treatment area
(Section 10.2)
5.0 RECOMMENDATION:
Propose to install
Traynor Environmental recommends that an O’Reilly Oakstown Treatment System or
similar manufactured EN certified system and gravity discharge into 500mm wide
trenches (Option 3 EPA Code of Practice 2021).
And discharge to Groundwater
Invert level of the trench/bed
gravel or drip tubing (m) 0.20m Below Ground Level (BGL)
Site Specific Conditions (if any) e.g. special works, Site Improvement Works, Testing etc.
The tests showed that the site has a Sub-surface value rating of 40.06 min/25mm indicating adequate percolation
characteristics of the Sub-surface. A surface value rating of 28.47 min/25mm was attained indicating adequate
percolation characteristics of the surface. Groundwater was encountered in the trial hole at 1.60m BGL. Bedrock
was encountered in the trial hole at 1.80m BGL.
A purpose-built polishing filter should be constructed to ensure that there is a minimum of 0.90m of suitable
percolating material between the base of the lowest part of the percolation area at all times. The distribution pipes
used in this system will be smooth walled, have a diameter of 100mm, have 8mm holes drilled in them 75mm apart,
and each pipe should be spaced parallel and 2500mm centre to centre apart.
Traynor Environmental Ltd also recommends that the O’ Reilly Oakstown Treatment System and polishing filter
construction is overseen by a suitable qualified and accredited person. RECEIVED: 26/06/2026
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6.0 TREATMENT SYSTEM DETAILS
SYSTEM TYPE: Septic Tank System (Chapter 7)
Tank Capacity (m2) N/A Percolation Area Mound Percolation Area
No. of Trenches N/A No. of Trenches N/A
Length of Trenches (m) N/A Length of Trenches (m) N/A
Invert Level (m) N/A Invert Level (m) N/A
SYSTEM TYPE: Secondary Treatment System (Chapters 8 and 9) and polishing filter (Section 10.1)
Secondary Treatment Systems receiving septic tank effluent (Chapter 8) Package Treatment Systems
Media Type Area (m2) Deep of Filter
(m) Invert Level
(m) receiving raw wastewater
(Chapter 9)
Sand/Soil N/A N/A N/A Type O’ Reilly Oakstown
Treatment System
Soil 100m (10 No. 10m
Trenches) 300mm 0.20m BGL Capacity PE 6
Constructed
Wetland N/A N/A N/A Sizing of Primary Compartment
Other N/A N/A N/A 4 m2
Polishing Filter: (Section 10.1)
Surface Area Sand Filter (m2) N/A No. of Trenches N/A
Option 1 – Direct Discharge Surface area (m2) N/A Length of Trenches (m) N/A
Option 2 – Pumped Discharge Surface Area (m2) N/A Invert Level (m) N/A
SYSTEM TYPE: O’Reilly Oakstown Treatment System and infiltration/ treatment area (section 10.2)
Identify purpose of tertiary treatment
Provide performance information
demonstrating system will provide
required treatment levels
Provide design information
O’Reilly Oakstown Treatment
System and Soil Polishing Filter
DISCHARGE ROUTE:
Groundwater Hydraulic Loading Rate (l/m2. d) 750 Surface Area (m2)
Surface Water Discharge Rate (m3/hr) 0.009
QUALITY ASSURANCE:
Installation & Commissioning On-going Maintenance
Recommend to be overseen by plant supplier.
Maintain and de-sludge annually RECEIVED: 26/06/2026
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7.0 SITE ASSESSOR DETAILS
Company: Traynor Environmental Ltd
Prefix: Mr. First Name: Nevin Surname: Traynor
Address:
Belturbet Business Park,
Creeny,
Belturbet,
Co. Cavan.
Qualifications/Experience: BSc. Env, H.Dip I.T, Cert SHWW, EPA/FAS Course Certified
Professional Indemnity Insurance Holder (€1 million cover)
Date of Report: 24.06.2026
Phone: 049 9522236 Fax: 049 9522808 E-mail: nevin@traynorenvironmental.com
Indemnity Insurance Number: 24/1/03161 (Renewed 12th July 2025)
Signed:
Nevin Traynor
BSc. Env, H.Dip I.T, Cert SHWW, EPA/FAS Cert.
For Traynor Environmental Ltd
RECEIVED: 26/06/2026
15
Plan View
RECEIVED: 26/06/2026
16
Cross Section
RECEIVED: 26/06/2026
17
8.0 SITE PHOTOGRAPHS
Facing North From the
Proposed Percolation Area
Facing South From the
Proposed Percolation Area
Facing East From the
Proposed Percolation Area
Facing West From the
Proposed Percolation Area
Trial Hole – Front View Trial Hole – Side View
RECEIVED: 26/06/2026
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Percolation (“T”) Test 1 Percolation (“T”) Test 2
Percolation (“T”) Test 3 Percolation (“P”) Test 1
Percolation (“P”) Test 2
RECEIVED: 26/06/2026
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Maps Used As Part of the EPA Site Suitability Assessment
Groundwater/Aquifer Map
From the GSI Groundwater
Aquifer Map Site is
classified as PI - Poor
Aquifer - Bedrock which is
Generally Unproductive
except for Local Zones
Vulnerability Map
From the GSI Vulnerability
Map Site is classified as
High
RECEIVED: 26/06/2026
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Bedrock Map
From the GSI Bedrock Map
Site is classified Late
Ordovician-Silurian deep
marine greywacke,
mudstone (Longford-Down)
Teagasc Subsoil Map
From the Teagasc Subsoil
Map Site is classified as
Sandstone and shale till
(Lower Palaeozoic)
RECEIVED: 26/06/2026
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9.0 EPA/FAS CERTIFICATE
RECEIVED: 26/06/2026
22
10.0 P.I INSURANCE
RECEIVED: 26/06/2026
23
PROPOSAL
FOR
A
O’REILLY OAKSTOWN TREATMENT SYSTEM
PREPARED
FOR
BERNARD DOHERTY
DRUMLANDRICK
CASTLEBLANEY
CO. MONAGHAN
A75 F635
RECEIVED: 26/06/2026
TRAYNOR ENVIRONMENTAL LTD
EPA SEWAGE LOADING SIZING CHART - BERNARD DOHERTY
Situation Source Litres/day BOD5 g/d PE Organic Number of Population Hydraulic Organic Pupulation
Person Person Loading Persons (Organic)Loading (Lit)Loading (gr)(Hydraulic)
Domestic Normal Resident 150 60 1.00 5 5 750 300 5.00
Industrial Office and/or factory without canteen 30 20 0.33 0 0 0 0.00
Office and/or factory with canteen 60.0 30.0 0.5 0 0 0 0.00
Open Industrial Site e.g. Quarry 40.0 25.0 0.4 0 0 0 0.00
School Non- residential with cooking on-site Students 60.0 30.0 0.5 0 0 0 0.00
6hr Shock Non-residential with no-cooking on site 35 20 0.33 0 0 0 0.00
Football clubs Players incl. showers 30 20 0.33 0 0 0 0.00
Spectators - Toilet blocks 8 10 0.17 0 0 0 0.00
Amenity Sites Restuarants 15 15 0.25 0 0 0 0.00
Function rooms 10 10 0.17 0 0 0 0.00
Toilet blocks (per use)8 10 0.17 0 0 0 0.00
Toilet blocks (long stay car parks)10 15 0.25 0 0 0 0.00
Golf clubs 25 15 0.25 0 0 0 0.00
Squash, with club house 25 15 0.25 0 0 0 0.00
Swimming 10 10 0.17 0 0 0 0.00
5 750 300 5.00
Loadings
Population Org 5.00PE
Hydraulically 5.00PE
RECEIVED: 26/06/2026
Date:
Applicant Name:
Site Address:
Design Capacity:
24th June 2026
BERNARD DOHERTY
DRUMLANDRICK, CASTLEBLANEY, CO.
MONAGHAN A75 F635
Maximum number of residents: 05
No. of single bedrooms: 00
No. of double bedrooms: 03
A representative of O’Reilly Oakstown Ltd has assessed the Soil Test Report
and confirms the suitability of their Oakstown BAF 6 PE Wastewater
Treatment System to treat effluent being discharged from the above proposed
dwelling based on the residential demands submitted to us above.
1. Waste Water Treatment System Design Details:
-Maximum Daily Design Loadings as per client
Max
No. of
users
Flow
Litres/day/person
Total
Hydraulic
Load
B0D5
(grams/day/person)
Total Organic
Loading
(grams/day)
5 150 750 litres 60 300
Total Organic Loading 0.30kg BOD/day
Total Hydraulic loading 0.75m³ /day
-Average treated effluent standard - see performance results on
EN-12566-3 certification attached
BOD 8mg/litre
TSS 12mg/litre
Ammonia 13mg/litre
-Proposed system details:►Oakstown BAF 6 P.E.
Volume of Total Plant 6.7m³
Volume of Primary Sedimentation
Chambers
4m³
Volume of Secondary Aeration Chamber 2m³
Volume of Biomedia 1.0m³ RECEIVED: 26/06/2026
2.Wastewater Treatment system description:
The Oakstown BAF 6 PE is designed to provide proven, cost effective primary
and secondary wastewater treatment in robust steel reinforced concrete
tanks.
The primary sedimentation chamber has substantial capacity (4m³) to allow
anaerobic digestion to occur naturally while letting sludge settle on the tank
floor.
Once primary treatment has taken place the effluent is further degraded in the
aeration chamber where oxygen enriched wastewater provides ideal
conditions for aerobic bacteria to thrive.
Before pumping to the percolation area the clear water is left to further settle
in the clarifier chamber to eliminate any remaining settle able solids.
3. Guarantee and warrantees:
O’Reilly Oakstown provide a 12 month maintenance service contract on all
systems from date of first occupation. We provide a 24 month warranty on all
parts.
4. Percolation:
The percolation area designed must conform to the requirements of Table 10.1
of EPA Code of Practice 2021 Wastewater Treatment and Disposal System
serving single houses.
The percolation area requirements are as follows:
Sub Surface value: 40.06 min/25mm as per Site Characterisation Form.
Surface value: 28.47 min/25mm as per Site Characterisation Form.
Depth from ground surface to water table: 1.60m BGL
Depth from ground surface to winter groundwater level: None Encountered
Depth from ground surface to bed rock: 1.80m BGL
►See Site Characterisation report for percolation area details .RECEIVED: 26/06/2026
5. Client Responsibilities unless included in our quotation:
• Excavation and backfill.
• Construction of the percolation / polishing filter as recommended by the
site engineer on the Site Characterisation report and/or drawing.
• Provision of access for delivery by hi-ab truck to within 3 metres of the
excavation.
• Provision of a power ducting from the tanks to the house/garage.
• Mounting and connection of control panel to mains power in the
house/garage.
6. Operation and Maintenance:
The client is responsible for the operation and maintenance of the wastewater
treatment system in accordance with the owner’s manual supplied by O’Reilly
Oakstown.
Please do not hesitate to contact us if there are any further queries.
Yours sincerely,
RECEIVED: 26/06/2026
RECEIVED: 26/06/2026
BAF-Site-Instructions-6PE-System[rev.2] .pdf 1 31/01/2017 14:23
RECEIVED: 26/06/2026
BAF-Site-Instructions-6PE-System[rev.2] .pdf 2 31/01/2017 14:23
RECEIVED: 26/06/2026
2780 1910 800 1000 110 BIOREACTORCLARIFIERPUMP STATION
AIRCOMPRESSORCALPEDA GXR-9 AIR LIFT PUMPSLUDGE RETURN600 x 900
ACESS COVER
600 x 900
ACESS COVER
2490 1800 60°
6
0
°
100 250 SECTION A-A
CL
INLET DN110
PUMPSTATION CLARIFIER BIOREACTOR
TREATEDWATER OUTLET
BIOMEDIA100m2/m3
AIR DIFFUSER NORRES PRO AIR PRE PUR 601
AIRCOMPRESSOR
AIR LIFT PUMPSLUDGE RETURN 1500 2150 SECTION B-B
PRIMARY 1 PRIMARY 2
PRIMARY 1 PRIMARY 2
Oakstown 6PE BAF SYSTEM Sectional Elevation
I.S. EN ISO 9002
RECEIVED: 26/06/2026