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HomeMy WebLinkAbout2581 - F.I. Received Doc./j: Niall McKenna BSc Eng Drumdesco, Scotstown, Co Monaghan. H18 C622 087 2641790 1 047 89119 niallpmyles mail.com Vat Number: IE 3822368 J 19/4/2026 Reference: Ref Eoghan Treanor PI rnnniing RoWnt oci O1 Dwelling l ddU°oss: At Lappin/Lisconduff Tyholland, Co Monaghan PL REF 25/81 See attached additional information. Revised newspaper notice and site notice re SITE CHARACTERISATION AND NEW BOUNDARIES Attached; Site layout x 4 Newspaper notice Site notice Site characterisation Signed: 3jA. A. ©/U© FOR EOGHAN TREANOR, MULLAGHMORE NORTH, T1 VDAVNET, CO MONAGHAN. APPENDIX A: SITE CHARACTERISATION FORM File Reference: Eoghan Treanor, Mullaghmore North, Tydavneij Prefix: Mr First Name: Eoghan I Surname: ITreanor Address: Site Location and Townland: Mullaghmore North, Tydavnet, Co Monaghan. Mullaghmore North, Tydavnet, Co Monaghan. eoghanbarney@hotmail.com 0861089903 Number of Bedrooms: [4 Maximum Number of Residents: j Comments on population equivalent There are 4 double bedrooms which will equate to six adults. Proposed Water Supply: Mains 7 Private Well/Borehole Soil Type, (Specify Type): Subsoil, (Specify Type): Poorly drained mineral soil. Gleys. Irish forest soil. AminPD Sandstone and shale till TLCSsS Group Well/Borehole Bedrock Type: [SL Aquifer Category: Regionally Important I Locally Important LI Poor Vulnerability: Extreme High j Moderate Low Groundwater Body: Tydavnet J Status Good Name of Public/Group Scheme Water Supply within 1 km: Tydavnet GWS Source Protection Area: ZOC ❑ SI SO ❑ Groundwater Protection Response: R1 Presence of Significant Sites (Archaeological, Natural & Historical): Past experience in the area: None I did this site in 2017 and the percolation was quite good. 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). The site is potentially suitable as there appears to be no restrictions to the on -site treatment of domestic effluent. Surface water and ground water could be targets at risk. This site characterisation report is for an existing dwelling house on the site. Note: Only information available at the desk study stage should he used in this section. 3.1 Visual Assessment Landscape Position: Elevated on a North -Westerly facing slope with much lower ground to the South-West Slope: Steep (>1:5) L _I Shallow (1:5-1:20) Relatively Flat (<1:20) Slope Comment ABOUT 1: 16 Surface Features within a minimum of 250m (Distance To Features Should Be Noted In Metres) Houses: Existing dwelling house on the site for which this site characterisation report is for. Dwelling house 55m West South-West and 65m North-West. Existing Land Use: Woodland Vegetation Indicators: Grass and shrubs and trees. Groundwater Flow Direction: Expected North-West Ground Condition: Firm during a spell of unsettled weather with occasional rainfall. Site Boundaries: Mature hedges all around. Low -land to the South-West 3.1 Visual Assessment (contd.) Roads: Local road along the North-West boundary hedge of the site. Outcrops (Bedrock And/Or Subsoil): None Surface Water Ponding: None Lakes: Mullaghmore lough 316m North. Beaches/Shellfish Areas: None L I Wetlands: None Karst Features: None Watercourses/Streams:* Aghaboy river segment river 30m South-West. *Note and record water level 3.1 Visual Assessment (contd.) Drainage Ditches:' No ditch within 50m. 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 unsettled weather with occasional rainfall. *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): 1 2.1 Depth from ground surface Depth from ground surface to bedrock (m) (if present): to water table (m) (if present): 1.8 Depth of water ingress: [- ] Rock type (it present): INone Date and time of excavation: 13 Apr -2026 I 09:301 Date and time of examination: 15 -Apr -2026 08:00 Depth of Surface and Subsurface Soil/Subsoil Percolation Texture & Plasticity and Soil Density/ Colour**** Preferential Tests Classification" dilatancy*** Structure Compactness flowpaths 0.1 m F Q.2m1____ 0.3m Cll 0.4 m Is j 0.5m1 0.6 m II 0.7 m II 0.8m ISS 0.9 m 0 1.0 m II 1.1 m L__i 1.2 m 1.3 m II 1.4m [_ 1 1.5m II 1.6m I� 1.7 m (-i 1.8 m I 1.9m C_ll 2.0 m 2.1 m Lull 2.2 m L� 2.3 m CI 2.4m __ 2.5 m 0 2.6 m EI 2.7 m 0 2.8 m CI 2.9m II 3.0 m Li 3.1 m L_1 3.2 m II 3.3 m rI 3.4 m 0 3.5 m I SILT / CLAY 3 threads —60mm CRUMB SOFT I BROWN p. GRASS ROOTS TOP SOIL ribbons — ditatant SILY I CLAY 2 threads - 50mm SUBSOIL ribbons-dilatant GRANULAR UNCOMPACT PALE NONE BROWN I Likely Subsurface Percolation Value: L 20 Likely Surface Percolation Value: I 15 Note: Depth of percolation test holes should be indicated on tog 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 2.1 m deep with two distinct layers. Top -soil that was crumb in nature and below that sub -soil that was pale brown in colour and granular in nature with about 30% gravel and 10% cobbles. The water table was at 1.8m. 3.3(a) Subsurface Percolation Test for Subsoil Step 1: Test Hole Preparation Percolation Test Hole 1 2 3 I I i Depth from ground surface 11 to top of hole (mm) (A) 400 400 400 Depth from ground surface 80011 800lr 800► to base of hole (mm) (8) _1 Depth of hole (mm) [B - A] 40011 400II — 400 Dimensions of hole J ii 300 x 300 300 x 300 280 x 280 [length x breadth (mm)] __ Step 2: Pre -Soaking Test Holes Pre-soak start Date 13 -Apr -20261 I 13 -Apr -2026 13 -Apr -2026 Time 15:00 15:001 I 1500 2nd pre-soak Date 14 -Apr --2026 14 -Apr --2026 14 -Apr -20261 start Time 11:30 I 11:30 11:30 Each hole should be pre-soaked twice before the test is carried out. Step 3: Measuring T,00 Percolation Test Hole No. 1 2 3 Date of test 15-04-2026 15-04-20261 2026 15-04-2026 Time filled to 400 mm 08:00 08:00 08:00 Time water level at 300 mm L 08:40 08:3511 08:50 Time (n -in.) to drop 100 mm (T11,1) L 40.00 ft 35.00 50.00 Average Ti., 41.67 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 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) rum) 1 I 0$:40 09:5011 70.00 08:35 09:30 55.00 08:40 09:40 60.00 2 09:50 11:3011 100.00 09:30 11:0011 90.00 09:40 11:2011 100.00 3 I 11:30 13:55 145.00 11:00 13:20))140.00l 11:20 13:50 150.00 Average At 105.00 95.00 103.33 Value Average .fit/4 = - [Hole No.1]26.25 (tt) Average At/4 = [Hole No.2] [_ 23.75 (t,) Average At/4 = [Hole No.3] I 25.831(t3) Result of Test: Subsurface Percolation Value = 2528 (min/25 mm) Comments: he T test was a pass and this soil should be suitable for percolating effluent from an advanced treatment system. Step 5: Modified Method (where T,0o > 210 minutes) Percolation Test Hole No. Fall of water Time i Start 4' Finish Time I K, l T - in hole (mm) Factor Time Time of fall = T, Value = T, hh:mm hh:mm (ruins) f T , = 4.45 I� pp 1� = T 300-250 I 8.1 250-200 _ 9.7 200-150 11.9 150 - 100 14.1 Average I T- Value Percolation Test Hole No. 1 3 T- Value Hole 1 = (T1) 0.00 Percolation I Test Hole No. 1 2 Fall of water Time Start Finish ( Time K,, T - in hole (mm) Factor [[Time i Time of fall = T, Value = T, hh:mm hh:mm (rains) / T , = 4.45 yy ff /K 300 - 250 9 8.1 {i 0.00 250-200 97 k �._0.00 200-150 11.9 0.00 �� 150-100 �l 14_1 �1 0.00 Average T- Value T- Value Hole 2 = (T2)I 0.00 Result of Test: Subsurface Percolation Value = 1 0.00 (min/25 mm) Fall of water Time Start Finish ' Time K,T - Comments: in hole (mm) Factor Time ' Time of fall = T, h Value = T, hh:mm {I hh:mm l (mins) /T, = 4.45 300 - 250 8.1 � 1' 0.0011 ___ 250 - 200 9.7 _ 0•� i( 11 �� 200-150 11.9 o.00f 1 150-100 14.1 0.00 ____ Average T- Value T- Value Hole 3 = (T2) 0.00 3.3(b) Surface Percolation Test for Soil Step 1: Test Hole Preparation Percolation Test Hole 1 2 Depth from ground surface 11 to top of hole (mm) Depth from ground surface 400 400 400 to base of hole (mm) Depth of hole (mm) I 4001L 400 4001 Dimensions of hole [length x breadth (mm)] 300 x —300 300 x 28011 280 X 280 Step 2: Pre -Soaking Test Holes Pre-soak start Date Time 2nd pre-soak Date start Time 13 -Apr -2026 15:05 14 -Apr -2026 11:35 13 -Apr -2026 15:05 14 -Apr -2026 11:35 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 15 -Apr -26 B� 15 -Apr -26 I 15 -Apr -2026 Date of test 08:05 i 08:45 06:05 Time filled to 400 mm + 08:45 IL 08:45 08:501 Time water level at 300 mm 40.0011 4O.00l 45.00 Time to drop 100 mm (T ) ,00 41.671 Average Tt00 13 -Apr -2026 15:05 14 -Apr -2026 11:35 If TWO > 480 minutes then Surface Percolation value >90 - site unsuitable for discharge to ground If T,00 ≤ 210 minutes then go to Step 4; If T100 > 210 minutes then go to Step 5; Step 4: Standard Method (where Tioo ≤ 210 minutes) Percolation @ f 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 min) mm) (at 300 (at 200 mm) mm) (at 300 (at 200 mm) mm) 1 08:45 09:40 55.00 08:45 09:40 55.00 08:50 09:5011 60.00 2 I 09:40 10:45 65.00 09:40 00:50 70.00 09:50 11:00 70.00 3 10:45 12:35 110.00 10:50 12:50 120.00 11:001!13:00 120.00 Average AT 76.67 �8-67 83.33 Value Average AT/4 = [Hole No.1] 19.17((T1) Average AT/4 = [Hole No.21 T 20.421(12) Average AT/4 = [Hole No.3] 20.83 ( 3', Result of Test: Surface Percolation Value = �— 20.14 (min/25 mm) Comments: The topsoil at this site is of good quality and may be used if required to level up the percolation area. Step 5: Modified Method (where T,.O > 210 minutes) Percolation Test Hole No. 1 Fall of water Time Start Finish II Time I' K,, FG T - in hole (mm) Factor && Time Time of fall = T, Value = T, hh:mm )I hh:mm (mins) T., = 4.45 =T 300-250 I 8.1 0.0011 250-200 9.7 ] 0.00.1 � r ___________ 200 - 150 11.9 q �� 0.00?a 150 - 100 i 14.1 ;' 0 ______ Average T- Value T- Value Hole 1 = (T) t 0.00 Percolation I Test Hole No. 3 Fall of water Time Start Finish Time K, in hole (mm) Factor Time t Time of fall !ppppl = T, Value = T, hh:mm hh:mm t� (mins) �q I T _ = 4.45 g i p = T: / K„ 300 - 250 T8.1 lr f l o.00EIIH t3 I 250 - 200 9.7 , n iw i 200 - 150 11.9 ,�0 � �0•0og_ r: 0. 150 - 100 14.1 l t! j Average T- Value T- Value Hole 3 = (f=) ( 0.00 Percolation !� Test Hole No. p 2 Fall of water Time (s start ) Finish � Time K dd T - in hole (mm) Factor �' Time 0 Time f? of fall = T. Value = T, hh:mm hh:mm fr (minsl ! Ty = 4.45 300 - 250 8 8.1 0.00)1 _ _J 250 - 200 9.7 0.00{ 200-150 9T 11.9 ( ; 0.00 j_- I 150-100 0.00 _____ Average T- Value T- Value Hole 2 = (T,) 0.00 Result of Test: Surface Percolation Value = 0.00 (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: 1:165 Are all minimum separation distances met? I Depth of unsaturated soil and/or subsoil beneath invert of gravel �0 (or drip tubing in the case of drip dispersal system) Percolation test result: Surface: 20.14 Sub -surface: 25.28 Not Suitable for Development j Suitable for Development Identify all suitable options Septic tank system (septic tank and percolation area) (Chapter 7) No 2. Secondary Treatment System (Chapters 8 and 9) and soil polishing filter �r (Section 10.1) Tertiary Treatment System and Infiltration / Yes treatment area (Section 10.2) Discharge Route' Groundwater Propose to install: Sec�onda Treatment p ry System and sort polishing filter and discharge to: G1auTWater Invert level of the trench/bed gravel or drip tubing (m) l ____________ Site Specific Conditions (e.g. special works, site improvement works testing etc. Mechanical aeration system and a soil polishing filter to be installed and constructed to EPA 2021 specifications. I recommend 40m of percolation trench in the soil polishing filter consisting of 4 lei gths of trench each measuring 10m. 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 percolation area shall measure 10m x 12m. Ensure that the final effluent from the mechanical aeration system is distributed evenly to each of the four 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 soil polishing filter to divert surface water away from the percolation area and to prevent the water table rising in wet weather. 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. aquiler, 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) j Percolation Area No. of Trenches 4� Length of Trenches (m) [0'i Invert Level (m) 0.60; 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 Packaged Secondary (Chapter 8) Treatment Systems receiving raw wastewater (Chapter 9) Media Type Area (m2)' Depth of Filter Invert Level Type Sand/Soil i 'BAF TREATMENT SYSTEM Soil � �________ �______ Capacity PE 6 Constructed Wetland [_ [_J _ Sizing of Primary Compartment Other 2.90 m3 Polishing Filter*: (Section 10.1) Surface Area (rn2)" 20.00 Option 3 - Gravity Discharge 40.00 Trench length (m) Option 1 - Direct Discharge Surface area (m2) Option 4 - Low Pressure Pipe Distribution Option 2 - Pumped Discharge Trench length (m) Surface area (m2) 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 I Hydraulic Loading Rate * (I/m2.d) 4500 Surface Water r` n Discharge Rate (m3/hr) 0.04 Hydraulic loading rate is detei mined by the percolation rate of subsoil ** Water Pollution Act discharge licence required Surface area (m2) 20.00 QUALITY ASSURANCE: Installation & Commissioning System to be signed off by a ah#iy qualtIied pers and re omi nenndiatrons in spa 5.i0 to be adhered to_ Package treatment system must conform to EN 1256-3 . Package tre^atnrent system to be pmpedy rstated and cetlilled by crorrapy supp4u me sys4eral iin acrdarioe wft Mme EPA d ipraoe. Keep records ot rfesiaVag tot five years. On -going Maintenance Desiudge tact/ as r pe', izaj. ih d 0a sys c fo d+am s' faca . Maintenance contra to the age by suet aag the age treeahnent system and contract must be adhered to so as to ensure that the system crate to ft diion arty.. Company: Sto abs Prefix: Mr First Name: Mud ( Surname: jI-bohan 1, Address: !TERERA SCOTSTOWN, CO.. MONAGH-tAN Qualifications/Experience: [GS I I EPA CERTIFIED Date of Report: 1 Phone: MIBM162 E-mail :jt o9aosart ncrYJotatc.raoraa Indemnity Insurance Number: " RPi-1Et AD94&-OO Signature: L VULNERABILHV LOWFO, BEDROCK DSL RQWRR5 AG�9(.) L_AI(ES AQUIIFER CATEGORY EGORV H WELLS A D BOREL OLES A WACENT TO THE SITE _i Public Supply Source Protection Areas S! -Inner Protection Area SO -Outer Protection Area SOURCE R T ECTBON DATA (h\9/A}) AERIAL VIEW OF PERCOLATSON WWWE T N L o cii . ,l y, XI S ir«G />> Dw 13 r, R`1'� "OVIU6 p / T$. q fi d✓�'i GAL F o �u ova r,4 SKEC0I OF PERCOLATi 0ON AREA D��9CLUDVb\G MATE SURROUNDS VIEWS OF PERCOLATION SITE !L. •ter'R#—S t. p 14 /Y gyp:. a ♦ Lr M' M / _ � f 74 r�.:RY l+✓.� t �'ir,�O�'w.�4; 'y�4 1 . EA .� 6' ) ,r y•. J. SIL tet._, I �r�w a v q. VIEWS or PERCOLATION SITE EXISTING DWELLING HOUSE ON THE SITE r `'i:�. •t � ){ _ - 1' ; .i"' ,., �. ri 1�r� - ran �i �-� 5 j;jr`p of 'fi ,:ee - MV r , •e ! !.OW GROUND TO THE NORTH-EAST OF THE SITE $ f .1 1 .1 t I. • ''t 1i `(� "1l5 Ste- it 14='.r�� ac � n'•t�'%�ty`F�l[ * 'k• :Y Oe m .. •1 ysi�.-��.lA Y TRIAL HOLE TWO DAYS AFTER EXCAVATION �� • :�'_ .,. , f •...fs y�:.,'.. '' .. 'Er pTr-:'�• =`l�tatiMEr'�,�w:c ,i='.1 ,4.�":y"S v!,.�S �wi '. •��• r v° [ ti* 10 V"r[re4 ^ tt vk J i f Ti T2 � as ir: 6 r T TEST HOLES 1:;;;: I AA P1 P3 P TEST HOLES �• �� -• J• 'i' APf a• 1 P2 OUTLINE SPECI[FICAT][ONS FOR MOUNDED SOIL POLISHING FILTER 1. Treated effluent from the mechanical aeration sump unit shall be pumped intermittently to the distribution chamber feeding the 4 percolation trenches. 2. The slope of the percolation trenches from the distribution chamber shall be 1 in 200 30 The length of each of the 4 percolation trenched shall be 10m0 `!l otal length 40m0 40 The separation distance between the percolation trenches shall be 2m Qie 2'.Sm centre to centre) So -Percolation pipes shall be 100mm diameter smooth wall uPVCC sewer pipes, perforated. at 4, 6 and 6 o'clock. Perforations shall be Gmm diameter, at 75mm centre's along the pipe° Holes shall be checked before installation to ensure they are free from debris. 60 The width of each percolation trench shall be 5000 mm0 7. The depth of each percolation trench shall be 600mm below the ground surface. 8> Percolation pipes shall be laid on a 250ioam bed of washed gravel, having particles in the range of 8 - 32mnmo 90 Pipe surround shall be washed gravel, having particle size in the range 8 32mmo 10. Pipe cover shall be 150mm depth of washed gravel, having particle sire in the range of 8 e 32mmo 110 Geote-7�tile layer to be placed on top of this followed by 100mm topsoil to top of Mound. 120 Geotexxtile shall be in accordance with ENS 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 water0 They should be suitable for rocolcoling and scouring purposes° 13. A surface land drain 1m deep shall be employed upslope from the 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° 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 ble 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 ble 6.1 EPA Code of Practice 2021 unless stated otherwise GROUND LEVEL TOPSOIL 100MM GEOTEXTILE LAYER 150MM WASHED STONE ABOVE PIPE 0.6M U) 100MM PIPE 250MM WASHED STONE BELOW PIPE INVERT OF TRENCH SUBSOIL MIN 0.9M WATER TABLE EACH TRENCH 500MM WIDE SECTION THROUGH SUBSOIL PERCOLATION SYSTEM