HomeMy WebLinkAbout2638 - Other Assessments No 2 (2)PLANMON. CO. Co_ ER
NING SECTION
SERVICES
Engineering Design Consultancy
:(I
Site Suitability Assessment for one-off
Wastewater Treatment Systems
FEARGAL HANRATTY & HANNAH
FINEGAN
Feargal Hanratty & Hannah Finegan, Lisdrumturk, CMX, Co. Monaghan
Client: Feargal Hanratty & Hannah Finegan
Site: Lisdrumturk, CMX, Co. Monaghan
Report By: Micheal Murtagh
BEng, MIEI, CEng
Date: 29/04/2026
M: +353 87 7570725 E: info@berservices.ie W: www.berservices.ie
APPENDIX A: SITE CHARACTERISATION FORM
File Reference:
Prefix: Mr First Name: Feargal Hanratty Surname: & Hannah Finegan
Address: Site Location and Townland:
Lisdrumturk, CMX, Co. Monaghan Lisdrumturk, CMX, Co. Monaghan
Number of Bedrooms: I4 Maximum Number of Residents: 6
Comments on population equivalent
Population Equivalent of less than 10. The total design waster water load is established from the max. population based on the
No. of bedrooms. For the purpose of the COP the minimum house size is 2 beds which equates to a design capacity of 4 PE.
Every additional bedroom and additional 1 PE is added.
Proposed Water Supply:
Mains Private Well/Borehole Z
Soil Type, (Specify Type): Sandstone and shale till (Lower Palaeozoic)
Till derived from Lower Palaeozoic sandstones and shales
Subsoil, (Specify Type):
Group Well/Borehole
Bedrock Type: Late Ordovician -Silurian deep marine greywacke, mudstone (Longford -Down)
Aquifer Category: Regionally Important Locally Important Poor PI
Vulnerability: Extreme High ❑✓ Moderate Low
Groundwater Body: Monaghan Status Good
Name of Public/Group Scheme Water Supply within 1 km: n/a
Source Protection Area: ZOC ❑ SI ❑ SO ❑ Groundwater Protection Response: R2'
Presence of Significant Sites
(Archaeological, Natural & Historical):
Past experience in the area:
V/A
Good drainage
Comments: I
(Integrate the information above in order to comment on: the potential suitability of the site, potential targets at risk, and/or any potential site restrictions).
This site may be suitable subject to further analysis. Integrating the above information the groundwater appears to be the main
target at risk.
Note: Only information available at the desk study stage should be used in this section.
3.0 ON -SITE ASSESSMENT
3.1 Visual Assessment
Landscape Position:
diddle of the slope
Slope: Steep (>1:5) Shallow (1:5-1:20) ❑✓ Relatively Flat (<1:20) U
Slope Comment slope at wwts location
Surface Features within a minimum of 250m (Distance To Features Should Be Noted In Metres)
Houses:
No Houses Located within 100m of the proposed WWTS
Existing Land Use:
kgricultural
Vegetation Indicators:
i/a
Groundwater Flow Direction: North Easterley Direction as indicated on site sketch
Ground Condition:
Dry & firm Underfoot
Site Boundaries:
Ditch/fence as indicated on Site Layout Map
3.0 ON -SITE ASSESSMEN
3.1 Visual Assessment (contd.)
Drainage Ditches:*
None within 100m of the proposed site
Springs:*
Wells:'
None located within 100m of the Proposed site
Comments:
(Integrate the information above in order to comment on: the potential suitability of the site, potential targets at risk, the suitability of the site to treat the wastewater
and the location of the proposed system within the site).
Integrating the above information groundwater would seem to be the main potential target at risk. Further analysis is to be carried
out via trial hole inspection and percolation tests.
"Note and record water level
3.2 Trial Hole (should be a minimum of 2.1m deep (3m for regionally important aquifers))
To avoid any accidental damage, a trial hole assessment or percolation tests should not be undertaken
in areas which are at or adjacent to significant sites, (e.g. NHAs, SACs, SPAs, and/or Archaeological
etc.), without prior advice from National Parks and Wildlife Service or the Heritage Service.
Depth of trial hole (m): 2.0
Depth from ground surface Depth from ground surface
to bedrock (m) (if present): to water table (m) (if present): 1.4
Depth of water ingress: Rock type (it present):
Date and time of excavation: 22 -Mar -2026 09:00 Date and time of examination: 29 -Mar -2026 10:00
Depth of
Surface and
Subsurface
Percolation
Tests
0.1 m II
0.2 m II
0.3 m l�
0.4m 0
0.5 m 0
0.6 m II
0.7m 0
0.8 m 0
0.9m II
1.0 m I mottlinc
1.lml lI
1.2 m 0
1.3 m I
1.4 m 0
1.5m I
1.6 m 0
1.7 m I
1.8m II
1.9m 0
2.Om II
2.1 m
2.2 m I I
2.3 m 0
2.4 m l�
2.5m II
2.6 m II
2.7m II
2.8m 0
2.9m 0
3.0 m I
3.lml
0
3.2m1___
3.3 m I
3.4m
3.5m 0
Soil/Subsoil
Texture & Plasticity and Soil Density/
Classification** dilatancy*** Structure Compactness
Topsoil
CLAY with gravel
boulders & cobbles
throughout
N/A n/a
n/a structureless
WA T E R
--------------- ------------
B A S E OF
n/a
Firm
TAB
-------------------
L
E
TRIAL
Colour**** Preferential
flowpaths
Dark Brown
PIT
Likely Subsurface Percolation Value: 20
Likely Surface Percolation Value: I 20
Note: Depth of percolation test holes should be indicated on log above. ('Enter Surface or Subsurface at depths as appropriate).
See Appendix E for BS 5930 classification.
3 samples to be tested for each horizon and results should be entered above for each horizon.
All signs of mottling should be recorded.
Through Roots
I Through Roots
3.2 Trial Hole (contd.) Evaluation:
This site appears to be suitable but the the separation distances need to be checked. The wastewater can be treated before
entering the groundwater and the effluent will get away without Ponding at the surface. From analysis of the trial pit and the soil
Layers a T value of 20-50 would be expected. Possible mottling at 1.0m below Ground level indicating seasonal watertable.
Further investigation to be carried out via the Percolation tests.
3.3(a) Subsurface Percolation Test for Subsoil
Step 1: Test Hole Preparation
Percolation Test Hole
1
K
Depth from ground surface
300
280
300
to top of hole (mm) (A)
Depth from ground surface
750
750
750
to base of hole (mm) (B)
Depth of hole (mm) [B - A]
450
470
450
Dimensions of hole
370 x 380
350 x 340
300 x 320
[length x breadth (mm)]
Step 2: Pre -Soaking Test Holes
Pre-soak start Date 28 -Apr -2026 28 -Apr -
Time 09:00 09:00
2nd pre-soak Date 28 -Apr -2026 28 -Apr -2026
start Time 13:00 13:00
Each hole should be pre-soaked twice before the test is carried out.
Step 3: Measuring T,00
Percolation Test Hole No.
Date of test
Time filled to 400 mm
Time water level at 300 mm
1
2
28 -Apr -2026
09:00
28 -Apr -2026
13:00
3
29-04-2026 29-04-2026 29-04-2026
09:20 09:20 09:20
LIII IIfi 09:59 11:41
Time (min,) to drop 100 mm (T ) 135.00 39.00 141.00
,00
Average T100
If T100 > 480 minutes then Subsurface Percolation value >120 - site unsuitable for discharge to ground
If T100 < 210 minutes then go to Step 4;
If T100>210 minutes then go to Step 5;
105.00
Step 4: Standard Method (where T100 ≤ 210 minutes)
Percolation
Test Hole
1
2
3
Fill no.
Start Finish At (min)
Start Finish At (min)
Start Finish At (min)
Time Time
Time Time
Time Time
(at 300 (at 200
mm) mm)
(at 300 (at 200
mm) mm)
(at 300 (at 200
mm) mm)
1
11:35 180.00
09:59 11:40 101.00
11:41 ir 14:48 187.00
2
14:35 18:2411 229.001
11:40 14:341T 174.00
14:48 18:41 233.00
3
Average At
18:24 22:50 266.00
14:34 18:4111 247.00
174.00
18:41 23:15 274.00
231.33
225.00
Value
Average At/4 =
[Hole No.1] 56.251(t1)
Average At/4 =
[Hole No.2] I 43.50 (t2)
Average At/4 =
[Hole No.3] 57.831(t3)
Result of Test: Subsurface Percolation Value = 52.53 (min/25 mm)
Comments:
be "T" Tests carried out are within the acceptable range as per the EPA CODE OF PRACTICE
P" Test to be carried out due to water table.
Step 5: Modified Method (where T,0,, > 210 minutes)
Percolation
Test Hole No.
Percolation
Test Hole No. 2
Fall of water
Time
Start
Finish
Time
K„
T -
Fall of water
Time
Start
Finish
Time
K,
T —
in hole (mm)
Factor
Time
Time
of fall
= T,
Value
in hole (mm)
Factor
Time
Time
of fall
= T,
Value
= T,
hh:mm
hh:mm
(mins)
/ T
= 4.45
= T,
hh:mm
hh:mm
(mins)
IT
= 4.45
=T
/K,
=T,,
/K1,
300-250
I 8.1
0.00 �=
300 -250
8.1
�
0.00 I�
250 -200
9.7
0�
0.00
==
250 -200
9.7
��
0.00
�
200- 150
11.9
00
0.00
==
200- 150
11.9
=0
0.0011
150 - 100
14.1 =�
0.00 ==
150 - 100
14.1 �0
0.00
��
Average
T- Value T- Value Hole 1 = (T1) 0.00
Average
T- Value T- Value Hole 2 = (TZ) 0.00
Percolation
Test Hole No. 3
Fall of water Time Start Finish Time K,s T —
in hole (mm) Factor Time Tim§e of fall = T, Value
=T, hh:mm hh:mm (mins) /T,, =4.45
=T,, /K,
300-250 I 8.1 == 0.00 l
250 200 9.7 0.00 =�
200 - 150 11.9 0.00 _____
150-100 I 14.1 =0 0.00j=____
Result of Test: Subsurface Percolation Value =
0.00 (min/25 mm)
Comments:
Average I T- Value T- Value Hole 3 = (12) 0. 0] 1 1
3.3(b) Surface Percolation Test for Soil
Step 1: Test Hole Preparation
Percolation Test Hole 1 2 3
Depth from ground surface I
oI!
0
I
0
to top of hole (mm)
Depth from ground surface I
450
420
460
to base of hole (mm)
Depth of hole (mm)
450
420
460
Dimensions of hole
275 x 290
290 x 280
II
II
300 x 280
[length x breadth (mm)]
Step 2: Pre -Soaking Test Holes
Pre-soak start Date 28 -Mar -2026 28 -Mar -2026 28 -Mar -2026
Time 09:00 09:00 09:00
2nd pre-soak Date 28 -Mar -2026 28 -Mar -2026 28 -Mar -2026
start Time 14:00 14:00 14:00
Each hole should be pre-soaked twice before the test is carried out.
Step 3: Measuring T100
1 2 3
Percolation Test Hole No.
I II II I
29 -Mar -26 29 -Mar -26 29 -Mar -2026
Date of test
09:20 09:20 09:20
Time filled to 400 mm
11:30 12:01 12:25
Time water level at 300 mm
130.00 161.00 185.00
Time to drop 100 mm (T100O)
158.67
Average 1100
If T1®> 480 minutes then Surface Percolation value >90 - site unsuitable for discharge to ground
If T100 ≤ 210 minutes then go to Step 4;
If T100 > 210 minutes then go to Step 5;
Step 4: Standard Method (where T100 ≤ 210 minutes)
Percolation
Test Hole
1
2
3
Fill no.
Start Finish AT (min)
Start Finish AT (min)
Start Finish AT (min)
Time Time
Time Time
Time Time
(at 300 (at 200
mm) mm)
(at 300 (at 200
mm) mm)
(at 300 (at 200
mm) mm)
1
11:30 13:54 144.00112:01
14:5911 178.00
12:25 if 200.00
2
13:54 16:41 167.00
14:59 18:54 235.00115:45
19:22 217.00
3
Average AT
16:4 19;58 197.00
18:54 23:21 267.0
19:22 23:5911 277.00
231.33
169.33
226.67
Value
Average AT/4 =
[Hole No.1] 42.33 (T1)
Average AT/4 =
[Hole No.2] 56.671(T2)
Average AT/4 =
[Hole No.3] 57.83 (T3,
Result of Test: Surface Percolation Value = 52.28 (min/25 mm)
Corn mints:
fhe "P" Tests carried out are within the acceptable range as per the EPA CODE OF PRACTICE
Step 5: Modified Method (where T100 > 210 minutes)
Percolation
Test Hole No.
Fall of water Time Start Finish Time Kf. T—
in hole (mm) Factor Time Time of fall = T Value
= T, hh:mm hh:mm (mins) / T = 4.45
= Tm 1K1,
300 250 I 8.1 0� 0.00 I�
250 200 9.7 0� 0.00 I I
200 - 150 11.9 00r 0.00 = I
150- 100 14.1 11 .1 .00 Iii
Average I T- Value
Percolation
Test Hole No. 3
T- Value Hole 1 = (T, ) 0.00
Fall of water
in hole (mm)
Time
Factor
=T,
Start
Time
hh:mm
Finish
Time
hh:mm
Time
of fall
(mins)
= T„
K„
= T,
/T,
T -
Value
=4.45
/1<1,
300 - 250
I 8.1 0.00 I I
250 - 200
9.7 =0 0.00__I=
200 - 150
I11.9 0.00 ==
150-100
I14.1 =� 0.0011 I=
Average
T- Value T- Value Hole 3 = (12) 0.00
Percolation
Test Hole No. 2
Fall of water
Time
Start
Finish
Time
K1,
T -
in hole (mm)
Factor
Time
Time
of fall
= T,
Value
=T,
hh:mm
hh:mm
(mins)
/TT,
=4.45
=T„
/K,,
300 - 250 I 8.1 —0.00 ��
250 -200 I9.7 00 0.00 I I
200- 150 I 11.9 00 0.0011 I=
150-100 I14.1 011111 0.0011_I _____
Average I T- Value T- Value Hole 2 = (12) 0.00
Result of Test: Surface Percolation Value =
o.00 (min/25 mm)
Comments:
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 distances met? I ✓
Depth of unsaturated soil and/or subsoil beneath invert of gravel 1.00
(or drip tubing in the case of drip dispersal system)
Percolation test result: Surface: 52.28 Sub -surface: 52.53
Not Suitable for Development IF Suitable for Development
Identify all suitable options
1. Septic tank system (septic tank and No
percolation area) (Chapter 7)
2. Secondary Treatment System
(Chapters 8 and 9) and soil polishing filter Yes
(Section 10.1)
3. Tertiary Treatment System and Infiltration / Yes
treatment area (Section 10.2)
Discharge Route'
Discharge to Groundwater
Propose to install: Secondary Treatment System and soil polishing filter
and discharge to: Ground Water
Invert level of the trench/bed gravel or drip tubing (m) 0.00
Site Specific Conditions (e.g. special works, site improvement works testing etc.
TRICEL NOVA UNIT OR SIMILAR UNIT
TO CONFORM TO EN12566-3 AND COMPLY WITH SR66
INVERT OF GRAVEL IN PERCOLATION TRENCH TO BE
AT EXISTING GROUND LEVEL
PERCOLATION TRENCH LENGTH OF 114LM REQUIRED
NO PIPE RUN TO BE LONGER THAN 10M
REFER TO SITE LAYOUT FOR POSITION & DETAILS OF WWTS & PERCOLATION AREA
ALL SEPARATION DISTANCES IN ACCORDANCE WITH EPA CODE OF PRACTICE
' A discharge of sewage effluent to "waters" (definition includes any or any part of any river, stream, lake, canal, reservoir, aquifer, pond, watercourse or other
inland waters, whether natural or artificial) will require a licence under the Water Pollution Acts 1977-90. Refer to Section 2.4.
SYSTEM TYPE: Septic Tank Systems (Chapter 7)
Tank Capacity (rn3) 0 Percolation Area
No. of Trenches 0
Length of Trenches (m)
Invert Level (m) 0
Mounded Percolation Area
No. of Trenches 0
Length of Trenches (m) 0
Invert Level (m)
SYSTEM TYPE: Secondary Treatment System (Chapters 8 and 9) and polishing filter (Section 10.1)
Secondary Treatment Systems receiving septic tank effluent
(Chapter 8)
Media Type Area (ms)* Depth of Filter Invert Level
Sand/Soil
Soil
Constructed Wetland
Other
Polishing Filter*: (Section 10.1)
Surface Area (m2)*
Option 1 - Direct Discharge
Surface area (m2)
Option 2 - Pumped Discharge
Surface area (m2)
Packaged Secondary
Treatment Systems
receiving raw wastewater
(Chapter 9)
Type
TRICEL NOVA
Capacity PE 6
Sizing of Primary Compartment
Option 3 - Gravity Discharge
Trench length (m)
Option 4 - Low Pressure
Pipe Distribution
0 Trench length (m)
Option 5 - Drip Dispersal
Surface area (m2)
4.00 m3
SYSTEM TYPE: Tertiary Treatment System and infiltration / treatment area (Section 10.2)
Identify purpose of tertiary Provide performance information Provide design information
treatment demonstrating system will provide
required treatment levels
DISCHARGE ROUTE:
Groundwater R] Hydraulic Loading Rate * (I/m2.d) 25.00
Surface Water ** Discharge Rate (m3/hr)
Hydraulic loading rate is determined by the percolation rate of subsoil
** Water Pollution Act discharge licence required
Surface area (m2)
QUALITY ASSURANCE:
Installation & Commissioning
Installation to be carried out according to EPA guidelines and planning authority requirements.
Commissioning to be carried out by suitably qualified person i.e.. Engineer, Architect, etc; who possess sufficient indemnity
insurance
On -going Maintenance
Maintenance contract to be entered into between WWTS Manufacturer and Client
Company: BER SERVICES ENERGY CONSULTANTS LTD
Prefix: Mr First Name: Micheal Surname: Murtagh
Address:
annavackey, Hackballscross, Dundalk, Co. Louth
Qualifications/Experience: BEng, MIEI, CEng, FAS Site Suitability Assessment course certified
Date of Report: 30 -Apr -2026
Phone: P 087 7570725
E-mail info@berservices.ie
Indemnity Insurance Number: AP10003737
W. -
Signature:
NOTE: To secure your work prior to forwarding to third parties please select Print, select Printer
"print to PDF" and name and save document.
Feargal Hanratty & Hannah Finegan, Lisdrumturk, CMX, Co. Monaghan
TRIAL HOLE
SITE
M: +353 87 7570725 E: info@berservices.ie W: www.berservices.ie
Feargal Hanratty & Hannah Finegan, Lisdrumturk, CMX, Co. Monaghan
TEST HOLE "Ti"
TEST HOLE "T2"
TEST HOLE "T3"
M: +353 87 7570725 E: info@berservices.ie W: www.berservices.ie
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Phone: +353 877570725
Email: info(berservices.ie
Address: Annavackey
Hackballscross
Dundalk Co. Louth
www.berservices.ie