HomeMy WebLinkAbout2662 - Site Assessment ReportLE I
SERVICES __
Engineering Design Consultancy
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LTONAGHAN CO. ` i,,.19
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07 JUL 20'6
Site ������ �[� Sty Assessment for one-off
Wastewater Treatment Systems
MARTIN TURNS
Martin Burns, Corlea, CMX, Co. Monaghan.
Client: Martin Burns
Site: Corlea, 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: Martin Surname: Burns
Address: Site Location and Townland:
Corlea, CMX, Co. Monaghan Corlea, CMX, Co. Monaghan
Number of Bedrooms: I3 Maximum Number of Residents:
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 Group Well/Borehole LII
, ,i.,,,,',�� 1, ,'; .. ,,; t. �• .s� •�
Soil Type, (Specify Type):
Subsoil, (Specify Type):
Sandstone and shale till (Lower Palaeozoic)
Fill derived from Lower Palaeozoic sandstones and shales
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: R21
Presence of Significant Sites
(Archaeological, Natural & Historical):
Past experience in the area:
VIA
Good drainage
Comments:
(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.
3.1 Visual Assessment
Landscape Position:
Middle of the slope
Slope: Steep (>1:5) U Shallow (1:5-1:20) U 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:
House located West of Proposed percolation area- 90m
Existing Land Use:
kgricultural
Vegetation Indicators:
Va
Groundwater Flow Direction: Westerley Direction as indicated on site sketch
Ground Condition:
)ry & firm Underfoot
Site Boundaries:
)itch/fence as indicated on Site Layout Map
3.1 Visual Assessment (contd.)
Roads:
Public Road West of the proposed WWTS
Outcrops (Bedrock And/Or Subsoil):
None within 100m of the proposed site
Surface Water Ponding:
None within 100m of the proposed site
Lakes:
None within 100m of the proposed site
Beaches/Shellfish Areas:
ie within 100m of the proposed site
Wetlands:
None within 100m of the proposed site
Karst Features:
None within 100m of the proposed site
Watercourses/Streams:'
Stream located 50m West of Proposed Percolation Area
•Note and record water level
3.1 Visual Assessment (contd.)
Drainage Ditches:"
None within 100m of the proposed site
Springs:*
None within 100m of the proposed Site
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): 2.1
Depth from ground surface Depth from ground surface
to bedrock (m) (if present): to water table (m) (if present): 1.7
Depth of water ingress: Rock type (if present):
Date and time of excavation: 22 -Mar -2026 09:00 Date and time of examination: 29 -Mar -2026 1000
Depth of
Surface and
Subsurface Soil/Subsoil
Percolation Texture & Plasticity and Soil Density/ Colour**** Preferential
Tests Classification`" dilatancy""' Structure Compactness flowpaths
0.1 m II
0.2m II
0.3 m II
0.4m II
0.5m 0
0.6m
0.7 m II
0.8 m II
0.9m II
1.0m I
1.lml
1.2 m II
1.3 m
1.4m II
1.5 m II
1.6m II
1.7m1_I
1.8 m I
1.9m I
2.0 m
2.1 m
2.2m1
2.3m1
2.4 m 0
2.5 m l____
2.6 m 0
2.7 m I
2.8 m I
2.9m 0
3.0m l____
3.1 m II
3.2 m
3.3m I
3.4 m Lull I
3.5m 0
n/a
structureless
R
OF
Dark Brown
Brown
PIT
Likely Subsurface Percolation Value: 30
Likely Surface Percolation Value: 30
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.
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. 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
F
3
Depth from ground surface
to top of hole (mm) (A)
300
280
300
Depth from ground surface
to base of hole (mm) (B) LI
750L
750
750
Depth of hole (mm) [B - A]LI______________
450
450
470
Dimensions of hole
[length x breadth (mm)]
�X320
LI
�X340
370 x 380
Step 2: Pre -Soaking Test Holes
Pre-soak start Date 28 -Apr -2026 J 28 -Apr -2026
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 T100
Percolation Test Hole No. i
E
28 -Apr -2026
09:00
28 -Apr -2026
13:00
3
Date of test LII 29-04-2026 29-04-2026 L 29-04-2026
Time filled to 400 mm o9:00 09:00 09:00
Time water level at 300 mm 11:30 11:35 11Ii
Time (min.) to drop 100 mm (T100 ) 150.00 155.00 165.00
Average TWO LIII 156.67
If T100> 480 minutes then Subsurface Percolation value >120 - site unsuitable for discharge to ground
If T1 < 210 minutes then go to Step 4;
If 1100> 210 minutes then go to Step 5;
Step 4: Standard Method (where T700 ≤ 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 14:25 175.00!11:351114:4111
186.00
11:451114:48!!183.001
2
14:25!!17:47 202.00
14:41 18:06 205.00
14:48 18:2511 217.00
3
17:47 21:4111234.00
18:06 21:581P232.00
18:25!P22:30!!245.00
Average At
203.67
207.67
215.00
Value
Average At/4 =
[Hole No.1] 50.921(t1)
Average At/4 =
[Hole No.2] 51.921(t2)
Average At/4 =
[Hole No.3] 53.751(t3)
Result of Test: Subsurface Percolation Value = 52.19 (min/25 mm)
Comments:
'he "T" Tests carried out are within the acceptable range as per the EPA CODE OF PRACTICE
Jo "P" tests required
Step 5: Modified Method (where T100 > 210 minutes)
Percolation
Test Hole No.
Fall of water
Time
Start
Finish
Time
K„
T —
in hole (mm)
Factor
Time
Time
of fall
= T,
Value
= T
hh:mm
hh:mm
(mins)
/ T,,
= 4.45
=TT,
/K„
300-250
8.1
0.0011
I
250 - 200
9.7
=�
0.00 pI
200- 150
I 11.9
0�
0.00
I
150-100
I14.1 00
0.0011 I
Average
T- Value T- Value Hole 1 = (T1) 0.00
Percolation
Test Hole No. 3
Fall of water Time Start Finish Time K„ T —
in hole (mm) Factor Time Time of fall = T, Value
=T, hh:mm hh:mm (mins) /T, =4.45
=T, /K,s
300 - 250 8.1 =� 0.00 l �
250 - 200 9.7 =� 0.00 ��
200 - 150 11.9 =� 0.0011 I I
150-100 I14.1 0.00[ I I
Percolation
Test Hole No. 2
Fall of water
Time
Start
Finish
Time
K,
T —
in hole (mm)
Factor
Time
Time
of fall
=T,
Value
= T,
hh:mm
hh:mm
(mins)
/ T„
= 4.45
= T,;
/K
300 - 250
I 8.1
=�
0.00
_=
250 -200
9.7
0�
0.00
�=
200-150
11.9
00
0.00
I I
_____I
150 - 100
I 14.1 00
0.00 l[_____
Average
T- Value T- Value Hole 2 = (T2) 0.00
Result of Test: Subsurface Percolation Value
o (min/25 mm)
Comments:
Average I T- Value T- Value Hole 3 = (T2) 0.00 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
to top of hole (mm)
1E
1II0
II
Depth from ground surface
to base of hole (mm)
450
420
460
Depth of hole (mm)
450
420
460
Dimensions of hole
[length x breadth (mm)] L_300
x280 280
290 x 280
275 x 290
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 L28-Mar-202II
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.
Date of test 29 -Mar -26 29 -Mar -26 29 -Mar -2026
Time filled to 400 mm
Time water level at 300 mm
0.00 0.00 0.00
Timetodrop100mm100)
Average o.00
Ti.,
If T100 > 480 minutes then Surface Percolation value >90 - site unsuitable for discharge to ground
If T100 < 210 minutes then go to Step 4;
If T10> 210 minutes then go to Step 5;
Step 4: Standard Method (where T,00 210 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
II I 0.00
1II I 0.00
I l 0.00
2
o.oj
I fl I 0.001
I It iP 0.001
3
Average AT
II II 0.001
I II iI 0.001I
IF 0.00
0.00
0.00
0.00
Value
Average AT/4 =
[Hole No.1] 0.001(T)
Average AT/4 =
[Hole No.2] 0.001(T)
Average AT/4 =
[Hole No.3] I 0.001(T
Result of Test: Surface Percolation Value = 0.00 (min/25 mm)
Comments:
'he "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. 1
Fall of water
in hole (mm)
Time
Factor
= T,
Start
Time
hh:mm
Finish
Time
hh:mm
Time
of fall
(mins)
=Tm
K,
= Tf
/ T,,,
T —
Value
= 4.45
/K„
300-250
I 8.1 =� 0.0011 �
250-200
9.7 0� 0.00 �=
200-150
� 11.9 0� 0.00 �
150 - 100
14.1 00 0.00 ��
Average
T- Value T- Value Hole 1 = (T1) 0.00
Percolation
Test Hole No. 3
Percolation
Test Hole No. 2
Fall of water
in hole (mm)
Time
Factor
= T,
Start
Time
hh:mm
Finish
Time
hh:mm
Time
of fall
(miss)
=T
K,s
= T,
/ T,,,
T —
Value
= 4.45
/Ks
300 - 250
8.1 0 0.00 �
250 - 200
9.7 0� 0.00 �=
200-150
11.9 �0 0.00 =I
150-100
14.1 �0 0.00 [�
Average
T- Value T- Value Hole 2 = (TZ ) I 0.001
Result of
Test: Surface Percolation Value =
0.00 (min/25 mm)
Fall of water Time Start Finish Time K,, T - Comments:
in hole (mm) Factor Time Time of fall = T, Value
= T, hh:mm hh:mm (mins) / T, = 4.45
=T,,, 1K,,
300 -250 I 8.1 0.0011 I
250 - 200 9.7 =� 0.00 _�
200- 150 11.9 =� 0.00 ��
150-100 1 I____
14.1 =0 0.00
Average T- Value T- Value Hole 3 = (T2) I0.00
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
0.90
(or drip tubing in the case of drip dispersal system)
Percolation test result: Surface: Sub -surface: 52.19
Not Suitable for Development II Suitable for Development V
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) 0.80
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 800mm BELOW EXISTING GROUND LEVEL
PERCOLATION TRENCH LENGTH OF 95LM 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 (m3) Lillillil Percolation Area
No. of Trenches
Length of Trenches (m)
Invert Level (m) C________
Mounded Percolation Area
No. of Trenches
Length of Trenches (m)
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 (m2)* 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
I TRICEL NOVA I
Capacity PE 6
Sizing of Primary Compartment
4.0j m3
Option 3 - Gravity Discharge
Trench length (m)
Option 4 - Low Pressure
Pipe Distribution
Trench length (m)
Option 5 - Drip Dispersal
Surface area (m2)
95.00
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 Hydraulic Loading Rate * (I/m2.d) L 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:
4nnavackey, Hackballscross, Dundalk, Co. Louth
Qualifications/Experience: BEng, MIEI, CEng, FAS Site Suitability Assessment course certified
Date of Report: 01 -May -2026
Phone: 087 7570725 E-mail info@berservices.ie
Indemnity Insurance Number: AP10003737
Signature:
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Martin Burns, Corlea, CMX, Co. Monaghan.
TRIAL HOLE
M: +353 87 7570725
E: info@berservices.ie W: www.berservices.ie
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