HomeMy WebLinkAbout2684 - Site Assessment Reportv[�
FOR
SHANE McCREESH AND CATHERINE McAVOY,
DROMORE,
CASTLEBLAYNEY,
CO MONAGHAN.
MON. CO. CO.
PLANNING SECTION
/5 kuti 2026
REG. NO
PLANNING DEPARTMENT
REF. NO.
26/4
MONAGHAN CO. COUNCIL
SITE CHARACTERISATION FORM
COMPLETING THE FORM
Note: This form requires the latest version of Adobe Acrobat Reader
and on PC's Windows 7 or later. Windows XP produces errors
in calculations
Step 1:
Goto Menu Item File, Save As and save the file under a reference relating to the
client or the planning application reference if available.
Clear Form Use the Clear Form button to clear all information fields.
Notes:
All calculations in this form are automatic.
Where possible information is presented in the form of drop down selection lists to
eliminate potential errors.
Variable elements are recorded by tick boxes. In all cases only one tick box should be
activated.
All time record fields must be entered in twenty four hour format as follows: HH:MM
All date formats are DD-MM-YYYY.
All other data fields are in text entry format.
This form can be printed out fully populated for submission with related documents and
for your files. It can also be submitted by email.
Section 3.2 In this section use an underline across all six columns to indicate the depth
at which changes in classification / characteristics occur.
Section 3.4 Lists supporting documentation required.
Section 4 Select the treatment systems suitable for this site and the discharge route.
Section 5 Indicate the system type that it is proposed to install.
Section 6 Provide details, as required, on the proposed treatment system.
APPENDIX A: SITE CHARACTERISATION FORM
File Reference: Shane McCreesh, Dromore, Castleblayney.
• • . • .•• •
Prefix: Mr
0
First Name:
Shane Surname: McCreesh
Address:
Dromore, Castleblayney. Co. Monaghan
Number of Bedrooms: I4 0
Comments on population equivalent
Site Location and Townland:
Dromore, Castleblayney. Co. Monaghan
Maximum Number of Residents: r
There are 4 double bedrooms which will equate to six adults.
Proposed Water Supply:
Mains ® Private Well/Borehole
2.0 GENERALDEIAILS (Fromningpli
Soil Type, (Specify Type):
Poorly drained mineral soil. Gleys. AminPD
Sandstone and shale till TLPSsS
Subsoil, (Specify Type):
Group Well/Borehole
Bedrock Type: SMV
Aquifer Category: Regionally Important I Locally Important Poor PI
Vulnerability: Extreme O✓ High Moderate ❑ Low LIII
Groundwater Body: Louth Status Good
Name of Public/Group Scheme Water Supply within 1 km:
Source Protection Area: ZOC SI ❑ SO ❑ Groundwater Protection Response: R2'
Presence of Significant Sites
(Archaeological, Natural & Historical):
Past experience in the area:
None
Raised mounds generally required in this area due to rock near the surface..
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).
The site is potentially suitable as there appears to be no restrictions to the on -site treatment of domestic effluent. Surface
water (river adjacent to the site) and ground water could be targets at risk.
Note: Only information available at the desk study stage should be used in this section.
2IESSMENT
3.1 Visual Assessment
Landscape Position: Low lying near base of South -Easterly facing slope.
Slope: Steep (>1:b) U zjnaiiow ti:o-i:zu) U rsaiauvUly rI *L 1-,I.cu/ UI
Slope Comment About 1:18
Surface Features within a minimum of 250m (Distance To Features Should Be Noted In Metres)
Houses:
Dwelling house 121m North-West and 146m West North-West.
Existing Land Use:
gricultural grassland.
Veaetation Indicators:
crass
Groundwater Flow Direction: Expected South -East.
Ground Condition:
IFirm during a spell of warm dry weather.
Site Boundaries:
Mature hedges all around.
3.1 Visual Assessment (contd.)
Roads:
Local road 160m North-West.
Outcrops (Bedrock And/Or Subsoil):
Rock outcrop 140m South -East.
Surface Water Ponding:
None
Lakes:
Saint Peter's lake 406m North-East
Beaches/Shellfish Areas:
None
Wetlands:
None
Karst Features:
None
ii
Watercourses/Streams:"
Drumacon river along South -East boundary of the site. Really a very small stream..
*Note and record water level
3.1 Visual Assessment (contd.)
Drainage Ditches:
Open ditch behind the South -Western boundary hedge.
Springs:*
None listed within 100m
Wells:*
None within 100m
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).
The site was in good condition underfoot with the assessment being carried out during a period of very warm dry weather.
*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): 1.6
Depth of water ingress: 0.5 Rock type (if present): None
Date and time of excavation: 14 -Jul -2026 15:00 Date and time of examination: 16 -Jul -202 10:00
Depth of
Surface and
Subsurface Soil/Subsoil
Percolation Texture & Plasticity and Soil Density/ Colour*°,--` Preferential
Tests Classification** dilatancy*** Structure Compactness flowpaths
0.1m I I
0.2 m I
0.3 m
0.4 m IS I
0.5m I
0.6 m 0
0.7m rI
0.8m ISS
0.9m1
1.Om 0
1.lml
1.2 m II
1.3 m 0
1.4 m liiI
1.5m I
1.6 m 0
1.7 m 0
1.8 m 1I
1.9 m lI
2.Om
2.lml
l
2.2m l�
2.3m lI
2.4m 0
2.5 m 0
2.6m1
2.7 m I
2.8 m I
2.9 m 1I
3.om!
3.1 m II
3.2 m I I
3.3m
3.4m r
3.5 m
SILT / CLAY
TOP SOIL
SILT / CLAY subsoil
50% gravel
Base of trial hole 2.1 m
3 threads -60mm CRUMB
ribbons — dilatant
2 threads - 4mm
ribbons - dilatant GRANULAR
Likely Subsurface Percolation Value: 25
Likely Surface Percolation Value: 20
SOFT
UN COMPACT
BROWN GRASS ROOTS
POSSIBLY
ORANGE THROUGH GRAVEL
MATERIAL IN THE
SUBSOIL
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:
The trial hole was 2.1m deep. There were two distinct layers. Silt / clay top -soil and below that sub -soil that was granular in
nature with about 50% gravelly material and clay. The water table was at 1.5m
3.3(a) Subsurface Percolation Test for Subsoil
Step 1: Test Hole Preparation
Percolation Test Hole
I
N
3
Depth from ground surface
400
400
400
to top of hole (mm) (A)
Depth from ground surface
800
800
800
to base of hole (mm) (B)
Depth of hole (mm) [B - Al
400
400
400
Dimensions of hole
270 x 330
300 x 280
320 x 310
[length x breadth (mm)]
Step 2: Pre -Soaking Test Holes
Pre-soak start Date
14 -Jul -2026
14 -Jul -2026
14 -Jul -2026
Time
18:00
18:00
18:00
2nd pre-soak Date
15 -Jul -2026
15 -Jul -2026
15 -Jul -2026
start Time
15:30
15:30
15:30
Each hole should be pre-soaked twice before the test is carried
out.
Step 3: Measuring T100
Percolation Test Hole No.
1
i 1
2
I I
3
Date of test
16-07-2026
16-07-2026
16-07-2026
Time filled to 400 mm
10:00
10:00
10:00
Time water level at 300 mm
10:50
10:45
10:50
/
Time (min.) to drop 100 mm 1' 7' 1p0)
50.00
45.00
50.00
Average T700
48.33
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;
Step 4: Standard Method (where T100 ≤ 210 minutes)
Percolation
Test Hole
1
2
3
Fill no.
Start Finish At (min)
Time Time
Start Finish At (min)
Time Time
Start Finish At (min)
Time Time
(at 300 (at 200
mm) mm)
(at 300 (at 200
mm) mm)
(at 300 (at 200
mm) mm)
1
10:50 11:50 60
10:45 11:45 60
10:5011 12:00 70
2
11:50 13:10 80
11:45 13:00 751
I 12:00 13:30 90
3
Average At
13:101!15:001!Ji
13:00 14:40!!100
13:30 15:4011130
83.33
78.33
96.67
Value
Average At/4 =
[Hole No.1] 20.83 (t1)
Average At/4 =
[Hole No.2] I 19.58](t2)
Average At/4 =
[Hole No.3] 24.17 (t3)
Result of Test: Subsurface Percolation Value = 21.527777777777775 (min/25 mm)
Comments:
The T test was a pass but with a high percentage of gravel below 0.6m I will be recommending a raised mound soil polishing filter.
Step 5: Modified Method (where T100 > 210 minutes)
Percolation
Test Hole No. 1
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
(mins)
= Tm
K,
= T,
/ Tm
T-
Value
= 4.45
/K
Fall of water
in hole (mm)
Time
Factor
= Tf
Start
Time
hh:mm
Finish
Time
hh:mm
Time
of fall
(mins)
=T
K
= T,
/T,
T -
Value
= 4.45
/K,
300 -250
8.1 0.00. I I
300-250
I 8.1 Ir 0.00 l I=
250
9.7 0.00 I I
250-200
� 9.7 u� 0.00 �
-200
� 11.9 0� 0.00 =
200-150
11.9 00 0.00 ��
200-150
100
14.1 0.00 I
150- 100
14.1 00 0.001! I
150-
______
Average
T- Value T- Value Hole 1 = (T1) P°I
Average
T- Value T- Value Hole 2 = (T2) I 0.00
Result of Test: Subsurface Percolation Value =
Percolation
o (min/25 mm)
Test Hole No.
3
Fall of water Time Start Finish Time K„ T —
in hole (mm) Factor Time Tim§e of fall = T, Value
= T, hh:mm hh:mm (mins) / TT = 4.45
= Tm / K„
300 -250 I 8.1 0.00 l=
250 -200 9.7 0= 0.00 I0
200-150 11.9 0.00 r=
150-100 14.1 =0 0.00 ==
Average I T- Value T- Value Hole 3 = (T2) 0.00
Comments:
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)
Depth from ground surface I 400 400 400
to base of hole (mm)
Depth of hole (mm) LI
400 400
Dimensions of hole
[length x breadth (mm)] L71���280 290 x 290 290 x 280
Step 2: Pre -Soaking Test Holes
Pre-soak start Date 14 -Jul -2026 14 -Jul -2026 14 -Jul -2026
Time 16:35 16:35 16:35
2nd pre-soak Date 15 -Jul -2026 15 -Jul -2026 j 15 -Jul -2026
start Time 15:05 5:05 15:05
Each hole should be pre-soaked twice before the test is carried out.
Step 3: Measuring TWO
1 2 3
Percolation Test Hole No. II I
16 -Jul -26 16 -Jul -26 16 -Jul -2026
Date of test
10:05 10:05 10:05
Time filled to 400 mm
11:00 11:1011 11:00
Time water level at 300 mm
55.00 65.00 55.00
Time to drop 100 mm (T,00)
58.33
Average T100
If T1> 480 minutes then Surface Percolation value >90 — site unsuitable for discharge to ground
If T1 ≤ 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)
Time Time
Start Finish AT (min)
Time Time
Start Finish AT (min)
Time Time
(at 300 (at 200
mm) mm)
(at 300 (at 200
mm) mm)
(at 300 (at 200
mm) mm)
1I
11:001112:00 60.00j
11:10 12:20 70.00
11:00 12:00 60.00
2
12:00 13:30 90.00112:20
13:401P80.00
12:001113:4011 100.00
3
AT
13:30l15:30jT120.00113:40
15:4511 125.00113:401[15:5511
135.00
90.00
91.67
98.33
Average
Average AT/4 =
[Hole No.1] 22.50 (T,)
Average AT/4 =
[Hole No.2] 22.921(12)
Average AT/4 =
[Hole No.3] 24.58 (T3;
Result of Test: Surface Percolation Value = 23.33 (min/25 mm)
Cnmmants:
Ehe topsoil at this site is of good quality and may be used to form a raised mound soil percolation area to polish treated effluent from an
advanced treatment system.
Step 5: Modified Method (where T100> 210 minutes)
Percolation
Test Hole No. 1
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
(mins)
=T
K
= T,
IT,
T -
Value
=4.45
/K„
Fall of water
in hole (mm)
Time
Factor
=T1
Start
Time
hh:mm
Finish
Time
hh:mm
Time
of fall
(mins)
=T,
K,,
= T,
IT,,
T -
Value
/K„
300 -250
8.1 0.00 P
300 250
8.1 I 0.00 011111
250 200
9.7 Du 0.00 I
250 - 200
9.7 I_0.0011 11111
-
200 150
11.9 0.00 j
200 150
11.9 0.00
100
14.1 ==F-0-001
150 - 100
14.1 =0 0.00 pliii
150-
Average
T- Value T- Value Hole 1 = (T, ) I 0.00 I
Average
T- Value T- Value Hole 2 = (12) I 0.00
Result of
Test: Surface Percolation Value =
Percolation
0 (min/25 mm)
Test Hole No.
3
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
=Tm /K,
300 - 250 I 8.1 0.00 jI
250 - 200 I9.7 00 0.00 II
200-150 11.9 00 0.00 jI
150- 100 I 14.1 [PJLPI]0.0011 II
Average T- Value T- Value Hole 3 = (T2) I 0.00
3.4 The following associated Maps, Drawings and Photographs should be appended to this site
characterisation form.
1. Discovery Series 1:50,000 Map
indicating overall drainage,
groundwater flow direction and
housing density in the area.
2. Supporting maps for vulnerability,
aquifer classification, soil, subsoil,
bedrock.
3. North point should always be included.
4. (a) Scaled sketch of site showing
measurements to Trial Hole location
and
(b) Percolation Test Hole locations,
(c) wells and
(d) direction of groundwater flow
(if known),
(e) proposed house (incl. distances from
boundaries)
(f) adjacent houses,
(g) watercourses,
(h) significant sites
(i) and other relevant features.
5. Site specific cross sectional drawing
of the site and the proposed layout'
should be submitted.
6. Photographs of the trial hole, test holes
and site including landmarks (date and
time referenced).
7. Pumped design must be designed by a
suitably qualified person.
The calculated percolation area or polishing filter area should be set out accurately on the site layout drawing in accordance with the code
of practice's requirements.
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: 1:18
Are all minimum separation distances met?
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: 23.33 Sub -surface: 24.17
Not Suitable for Development Q
Identify all suitable options
1. Septic tank system (septic tank and INo
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)
Propose to install:
and discharge to:
Suitable for Development ll
Discharge Route'
Secondary Treatment System and soil polishing filter
Ground Water
Invert level of the trench/bed gravel or drip tubing (m) 0.60
Site Specific Conditions (e.g. special works, site improvement works testing etc.
Mechanical aeration system and a raised mound soil polishing filter measuring 1.0m in height to be installed and constructed
to EPA 2021 specifications. The raised mound is required due to the high percentage of gravel in the subsoil below 0.6m. The
raised mound shall be made up of the insitu topsoil. I recommend 60m of percolation trench in the soil polishing filter
consisting of 6 lengths of trench each measuring 1 Om. The invert of the percolation trenches should be at 0.6m with 0.9m
pervious unsaturated soil below to ensure proper polishing of the final effluent. The raised percolation area shall measure 13m
x 15m and may be landscaped into the contours of the site. Ensure that the final effluent from the mechanical aeration system
is distributed evenly to each of the six percolation trenches. It is important to ensure that the percolation trenches and related
pipe work are put in at the correct slope. A surface water drain measuring 1 m deep shall be employed (min 2m away) up -slope
from the raised mound soil polishing filter to divert surface water away from the percolation area and to prevent the water table
rising in wet weather. Ensure that the percolation area is kept the minimum 1 Om from the adjacent river.
NOTE: It is very important to ensure that the aeration pump remains on at all times on the mechanical aeration system or
otherwise the system will revert to septic conditions causing odors and poorer quality effluent which may lead to clogging of
the percolation trenches.
' 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) Percolation Area
Mounded Percolation Area
No. of Trenches �� No. of Trenches 6.00
Length of Trenches (m) Length of Trenches (m) 10.00
Invert Level (m) Invert Level (m) 0.60
SYSTEM TYPE: Secondary Treatment System (Chapters 8 and 9) and polishing filter (Section 10.1)
Secondary Treatment Systems receiving septic tank effluent
Packaged Secondary
(Chapter 8)
Treatment Systems
receiving raw wastewater
(Chapter 9)
Media Type Area (m2)*
Depth of Filter Invert Level
Type
Sand/Soil
BAF TREATMENT SYSTEM
Soil
Capacity PE 6
Constructed Wetland
Sizing of Primary Compartment
Other Li
P Li
2.90 m
Polishing Filter*: (Section 10.1)
30.00 Option 3 - Gravity Discharge 60.00
Surface Area (m2)*
Trench length (m)
Option 1 - Direct Discharge
Option 4 - Low Pressure
Surface area (m2)
Pipe Distribution
Option 2 - Pumped Discharge
Trench length (m)
Surface area (m2)
0
Option 5 - Drip Dispersal
Surface area (m2)
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 0 Hydraulic Loading Rate * (I/m2.d) 30.00
Surface Water ** Discharge Rate (m3/hr) Li 0.04
* Hydraulic loading rate is determined by the percolation rate of subsoil
** Water Pollution Act discharge licence required
Surface area (m2) 30.00
QUALITY ASSURANCE:
Installation & Commissioning
System to be signed off by a suitably qualified person and recommendations in section 5.0 to be adhered to. Package
treatment system must conform to EN 12566-3 standard. Package treatment system to be properly installed and certified by
company supplying the system in accordance with the EPA 2021 code of practice. Keep records of desludging for five years.
On -going Maintenance
Desludge tank as recommended by manufacturer and periodically inspect the system for damage or surface ponding.
Maintenance contract to be agreed by company supplying the package treatment system and contract must be adhered to so
as to ensure that the system continues to function properly.
Company: Blolabs
Prefix: Mr 0 First Name: Michael Surname: Iiolohan
Address
ITERERA, SCOTSTOWN, CO. MONAGHAN
Qualifications/Experience: GSI / EPA CERTIFIED
Date of Report: 18 -Jul -2026
Phone: 08681691621 E-mail lbiolabsirl@outlook.com
Indemnity Insurance Number: RPI-IE000946-00
Signature:
O
)ROMORE
WELLS AND BOREHOLES ADJACENT TO THE SITE
CHURCH HILL
Drumaklll
HA
N
Nei i
`. ANNAORUMMAN
Public Supply Source Protection Areas
TULLYRAIIAN SI-Inner Protection Area
SO -Outer Protection Area
`iROMORE
.N
LONGFIELD \
DRUMACON
t1
TOOME
SOURCE PROTECTION DATA (N/A)
0ROMORE
RIVERS AND LAKES
7
AQUIFER CATEGORY PI
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VULNERABILITY EXTREME
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SMALL STREAM ADJACENT TO THE SITE
TRIAL HOLE ON DAY OF EXCAVATION
TRIAL HOLE TWO DAYS AFTER EXCAVATION
T2
Ti
T3
T TEST HOLES
P1 P2
P3
P TEST HOLES
OUTLINE SPECIFICATIONS FOR MOUNDED SOIL POLISHING FILTER
1. Treated effluent from the mechanical aeration sump unit shall be pumped
intermittently or fed by gravity if the levels allow to the distribution chamber
on the mound feeding the 6 percolation trenches. The raised mound shall be 1m
in height throughout its area and consist of the topsoil from the site. The
mound shall measure 13m x 15m and may be landscaped into the contours of
the site.
2. The slope of the percolation trenches from the distribution chamber shall be 1
in 200
3. The length of each of the 6 percolation trenched shall be 10m. Total length
60m.
4. The separation distance between the percolation trenches shall be 2m (ie
2.5m centre to centre)
5. Percolation pipes shall be 100mm diameter smooth wall uPVC sewer pipes,
perforated at 4, 6 and 8 o'clock. Perforations shall be 8mm diameter, at
75mm centre's along the pipe. Holes shall be checked before installation to
ensure they are free from debris.
6. The width of each percolation trench shall be 500mm.
7. The depth of each percolation trench shall be 600mm below the mound
surface.
8. Percolation pipes shall be laid on a 250mm bed of washed gravel, having
particles in the range of 8 - 32mm.
9. Pipe surround shall be washed gravel, having particle size in the range 8 -
32mm.
10. Pipe cover shall be 150mm depth of washed gravel, having particle size in
the range of 8 - 32mm.
11. Geotextile layer to be placed on top of this followed by 100mm topsoil to
top of mound.
12. Geotextile shall be in accordance with EN ISO 10319.
Access / inspection points and vents shall be provided for the ends of the
percolation pipes. Covers shall be visible and installed to prevent the
ingress of water. They shall be suitable for rodding and scouring purposes.
13. A surface land drain lm deep shall be employed upslope from the raised
mound soil polishing filter and not closer than 2m to divert surface water away
from it and to prevent the water table rising in this area during wet weather.
14. Ensure that the percolation area is kept at the minimum of lOm from the
small river adjacent to the site along the South -Eastern boundary.
SCHEDULE OF SITE SEPARATION DISTANCES
PACKAGE TREATMENT SYSTEM
. Minimum distance to any dwelling = 7m
. Minimum distance to site boundary = 3m
. Minimum distance to trees = 3m
. Minimum distance to roads = 4m
. Minimum distance to slope breaks = 10m
. Minimum distance to watercourse / streams = 10m
. Minimum distance to soakaway = 10m
Minimum distance to open drain = 10m
. Minimum distance to lake or foreshore = 50m
able 6.3 EPA Code of Practice 2021
POLISHING FILTER
. Minimum distance to any dwelling = 10m
. Minimum distance to site boundary = 3m
Minimum distance to trees = 3m
. Minimum distance to roads = 4m
. Minimum distance to slope breaks = 10m
. Minimum distance to water course / stream = 10m
. Minimum distance to soakaway = 10m
. Minimum distance to open drain = 10m
. Minimum distance to lake or foreshore = 50m
. Minimum distance to up gradient well = 15m
. Minimum distance well on same level = 30m
. Minimum distance to down gradient well = 40m
able 6.1 EPA Code of Practice 2021 unless stated otherwise
GEOTEXTILE LAYER
TOPSOIL
100MM
150MM WASHED
STONE ABOVE PIPE
O 100MM PIPE
250MM WASHED
STONE BELOW PIPE
SUITABLE SUBSOIL
MINIMUM 0.9M
Water table
EACH TRENCH 500MM WIDE
0.6M
INVERT OF TRENCH
MOUNDED TOPSOIL 1.0M
GROUND LEVEL
SECTION THROUGH MOUNDED SUBSOIL PERCOLATION SYSTEM