HomeMy WebLinkAbout2660265 - Site assessment reportFOR
RONAN AND LOUISE KIERNAN,
AGHALILE
CARRICKMACROSS,
CO MONAGHAN.
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WELLS AND BOREHOLES ADJACENT TO THE SITE
SOURCE PROTECTION DATA (N/A)
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RIVERS AND LAKES
AQUIFER CATEGORY Rk
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VULNERABILITY EXTREME
BEDROCK DPBL
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AERIAL VIEW OF PERCOLATION SITE
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VIEWS OF PERCOLATION SITE
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VIEWS OF PERCOLATION SITE
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TRIAL HOLE ON DAY OF EXCAVATION
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TRIAL HOLE TWO DAYS AFTER EXCAVATION
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T3
T TEST HOLES
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P1 P2
P3
P TEST HOLES
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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.
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,
75mm c 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 1m 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.
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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
(Table 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
(Table 6.1 EPA Code of Practice 2021 unless stated otherwise)
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MOUNDED TOPSOIL 1.0M
GROUND LEVEL
EACH TRENCH 500MM WIDE
SECTION THROUGH MOUNDED SUBSOIL PERCOLATION SYSTEM
GEOTEXTILE LAYER
TOPSOIL
100MM
0.6M
150MM WASHED
STONE ABOVE PIPE
O 100MM PIPE
250MM WASHED
STONE BELOW PIPE
SUITABLE SUBSOIL
MINIMUM 0.9M
INVERT OF TRENCH
Water table
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