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HomeMy WebLinkAbout2653 - Site Assessment ReportI I F Copy OF ,;2 VIOL ) Z60 Z - APPENDIX A: SITE CHARACTERISATION FORM File Reference: Fzi Prefix: Mr First Name: Enda - � Surname: I Hoey - Address: Site Location and Townland: lStradeen, Carrickmacross, Co. Monaghan _J Number of Bedrooms: I4 Maximum Number of Residents: 6 Comments on population equivalent r _ _ Proposed Water Supply: Mains a Private Well/Borehole Group Well/Borehole Soil Type, (Specify Type): Sandstone and Shales f;p. Till derived chiefly from Lower Palaeozoic rocks tr2 Subsoil, (Specify Type): Ilea �`1Pq�'0. C 1 Bedrock Type: Clontail Formation _______I Aquifer Category: Regionally Important Locally Important Poor PI Vulnerability: Extreme High ✓❑ Moderate Low Groundwater Body: I - __ 1 Status Name of Public/Group Scheme Water Supply within 1 km: J Source Protection Area: ZOC SI ❑ SO Groundwater Protection Response: RI Presence of Significant Sites (Archaeological, Natural & Historical): None Past experience in the area: None Comments: (Integrate the information above in order to comment on: the potential suitability of the site, potential Site suitable subject to normal good practice as per EPA guidelines. G blew C E �. . CO 16 JUN 2026 at risk, and/or any potential site restrictions). Note: Only Information available at the desk study stage should be used in this section. 3.1 Visual Assessment Landscape Position: The site is relatively flat Slope: Steep (>1:5)Ej Shallow (1:5-1:20) Relatively Flat (<1:20) ❑✓ Slope Comment 1 Surface Features within a minimum of 250m (Distance To Features Should Be Noted In Metres) Houses: Dwelling houses to northern and southern boundaries Existing Land Use: Agriculture Vegetation Indicators: Grass throughout Groundwater Flow Direction: Unknown Ground Condition: Dry underfoot Site Boundaries: Existing mature hedgerow and trees 3.1 Visual Assessment (contd.) Roads: Local road to Eastern boundary Outcrops (Bedrock And/Or Subsoil): None Surface Water Ponding: None Lakes: None within 250m Beaches/Shellfish Areas: None Wetlands: None Karst Features: None Watercourses/Streams *Note and record water level 3.1 Visual Assessment (contd.) Drainage Ditches:* None Springs:* (None Wells;* None 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). No water sources in the immediate vicinity at risk. *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): I N/A I to water table (m) (if present): [_ 1ii Depth of water ingress: I N/A] Rock type (if present): I None Date and time of excavation: 106 -Jul -2024 II 10:00 Date and time of examination: Lo9-Jul-2024 I I 09:00 Depth of Surface and Subsurface Percolation Tests 0.1 m - es 0.2m 0.3m 0.4m -es 0.5m 0.6m I 0.7m l� 0.8 m1 0.9m1 1.0m I 1.1m 1.2m1 1.3 m I 1.4m I 1.5m 1.6m I 1.7m 0 1.8m I 1.9m 2.0m I 2.1m I 2.2m 2.3m I 2.4m I 2.5m1____ 2.6m 2.7m1___ 2.8m 2.9m I 3.oml____ 3.im I 3.2m1 3.3m1 3.4m I 3.5m1___ Soil/Subsoil Texture & Plasticity and Soil Classification** dilatancy*** Structure Clay 1 Not Dilatent 1 Structureless silt/Clay Water TahiP I PVPI Rena of I-Inla Not Dilatent I Structureless Density/ Colour**** Preferential Compactness flowpaths Un-compact Dark Brown Grass roots Compact Light Brown Likely Subsurface Percolation Value: _ 45 Likely Surface Percolation Value: I 151 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: No Issues noted, a winter hight watertable level was allowed for 3.3(a) Subsurface Percolation Test for Subsoil Step 1: Test Hole Preparation Percolation Test Hole Depth from ground surface to top of hole (mm) (A) Depth from ground surface to base of hole (mm) (B) Depth of hole (mm) [B - A] 1 2 3 400 _-_ 400I� -- 400 800 L 800 800 Dimensions of hole [length x breadth (mm)] 300 x Step 2: Pre -Soaking Test Holes 400 4001 400 300 L_300x 300 300 x 300 Pre-soak start Date 08-JuI-2024 08 -Jul -20241 L 08 -Jul -2024 Time 09:30 09:30 09:30 2nd pre-soak Date 08 -Jul -2024 08 -Jul -2024 08 -Jul -20241 start Time r I j L 17:00 17:00 17:00 Each hole should be pre-soaked twice before the test is carried out. Step 3: Measuring T100 Percolation Test Hole No. 1 2 Date of test Time filled to 400 mm Time water level at 300 mm Time(min,)todrop100mm(T100)1 Average T1110 09-07-2024 09:0011 10:25 11 85.001 E - 09-07-202411 09:00 10:41 101.001r - 3 09-07-2024 liii 09:001 10:50 110.00 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; 98.67 Step 4: Standard Method (where T100 ≤ 210 minutes) Percolation Test Hole 1 Fill no. Start Finish At (min) Time Time (at 300 (at 200 mm) mm) L 10:2511 11:50 L 85.00 2 3 Start Finish At (min) Start Finish At (min) Time Time Time Time (at 300 (at 200 (at 300 (at 200 mm) mm) mm) mm) 10:41 L 12:251 104.00 1 10:5011_12;441[_i 2 :501L 13:19 89.00 12:2511_ 14:1411 109.00 1 141 14.40 116.00 3 13:19 14:50 91.00 Average At 88.33 Value Average At/4 = [Hole No.1] L__22.081(11) r 14:1411 16:09 115.00 L 14:40 16:3911119.0)0 109331L-116.33 -_ r Average At/4 = I Average At/4 = [Hole No.2] 1 27.331(t2) I [Hole No.3] 29.08 (t3) Result of Test: Subsurface Percolation Value = 1 26.171 (min/25 mm) Comments: T test has passed Step 5: Modified Method (where Ti., > 210 minutes) Percolation Test Hole No. I i Fall of water Time Start Finish Time K„ f - inhole (mm) Factor Time Time of fall = T, Value =T1 hh:mm hh:mm (mins) /T = 4.45 i =L /K„ 300 - 250 I 8.1 LL 0.00 jII 250 -200 9.7 =L 0.00 �= 200-150 11.9 L 0.0011= 150 - 100 I 14.1 LL 0.00 L= Average T- Value T- Value Hole 1 = (T,) _ 0.00 Percolation Test Hole No. 3 Fall of water Time Start Finish Time Ks ! T— in hole (mm) Factor Time Tim§e of fall = T, Value = T, hh:mm hh:mm ( lns) / T,, 4.45 j / K i 300- 250 8.1 II 0.00 l I= 250 -200 I III �� 0.00 200 - 150 II 11.9 0I °.°°11 I 150 - 100 1 14.1 LL 0 0.00 ii Average I T- Value T- Value Hole 3 = (T2) 0.00 Percolation j 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 = Tm 1K, 300 -250 8.1 =0 0.00 l__= 250 - 200 9.7 OL 0.00 L= 200-150 I 11.9 I 150-100 14.1 LL 0.0011 I Average T- Value T- Value Hole 2 = (T2) I 0.001 Result of Test: Subsurface Percolation Value = 0.00 I (min/25 mm) Comments: 3.3(b) Surface Percolation Test for Soil Step 1: Test Hole Preparation Percolation Test Hole 1 2 3 Depth from ground surface 0 0 to top of hole (mm) I - Depth from ground surface to hole � 400 � 400 � ll 40J base of (mm) _ — Depth of hole (mm) 400It_______ 400 LLL Dimensions of hole [length x breadth (mm)] 300 x 300 300 x 300 300 x 300 Step 2: Pre -Soaking Test Holes Pre-soak start Date I 08 -Jul -2024 08 -Jul -2024 I 08 -Jul -2024 Time 09:30 09:30 09:30 2nd pre-soak Date 08 -Jul -2024 ( 08 -Jul -2024 [^ 08 -Jul -2024 start Time P 1700 L_17:001 L 17:00 Each hole should be pre-soaked twice before the test is carried out. Step 3: Measuring T,00 1 2 3 Percolation Test Hole No. I I Date of test - _ 09 -Jul -24 F 09 -Jul -24J I 09u1 2024 Time filled to 400 mm 09:00 Time water level at 300 mm 09:35 IL 09:30 35.0011 27.00 [ 3.0.001 Time to drop 100 mm R,00) --- e T _ 30.67 Average goo If T,00 > 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 T100 < 210 minutes) Percolation Test Hole 1 Fill no, Start Finish AT (min) Start Time Time Time (at 300 (at 200 (at 300 mm) mm) mm) 1 I 09:35 10:1411 39.00 [__02j[ 2 3 Finish AT (min) Start Finish AT (min) Time Time Time (at 200 (at 300 (at 200 mm) mm) mm) 10:00jI 33.0011 09:301P 10:04!! 34.00 2 I 10:14 10:55 41.00 I 10:00 L i�:3611 36.001 1 10:04 10:40 36.001 3 I 10:55 11:39 44_0I 10:36 11:1811 42.00 10:40 11:2011 40.00 Average AT L_I _____ __________ 4133 37.0 E3�6.J67 Value Average /T/4 = Average AT/4 = Average AT/4 = [Hole No.1] L 1 ..33I(T1) [Hole No.2] 9.251(T2) [Hole No.3] I 9,171(T3) Result of Test: Surface Percolation Value = 9.58 (min/25 mm) Comments: P -test has passed Step 5: Modified Method (where T100> 210 minutes) Percolation Test Hole No. 1 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 9.7 Pu 0.00 250 - 2000 200- 150 I 11.9 = 0.00 150 - 100 I 14.1 0� 0.0011 ______ Average T- Value T- Value Hole 1 = (T1) I o.00l Percolation Test Hole No. 3 Fall of water Time Start i Finish Time K,T- in hole (mm) Factor Time Time of fall =T, Value =T, hh:mm hh:mm (mins) T. =4.45 T. /Ku 300 - 250 I 8.1 =� 0.00 F1=250-200 9.7 0.00 � 200-150 11.9 � 0.00L 1- 150 - 100 14.1 =� 0.0011 Average T- Value T- Value Hole 3 = (T2) I 0.00 Percolation Test Hole No. 2 Fall of water Time Start Finish Time K„ T- in hole (mm) Factor Time Time of fall =11 Value = T, hh:mm hh:mm (mins) / T, = 4.45 =T. /K„ 300-250 I 8.1 0� 0.0011= 250 - 200 9. 0[ 0.00 �0 200- 150 � 11.9 0.00 � 150-100 14.1 0.0011_I _____I Average T- Value T- Value Hole 2 = ( 2) 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 1/200 Are all minimum separation distances met? I / Depth of unsaturated soil and/or subsoil beneath invert of gravel 1.90 (or drip tubing in the case of drip dispersal system) Percolation test result: Surface: H 9.58 Sub -surface: I 26.17J Not Suitable for Development I Suitable for Development ✓ I Identify all suitable options 1. Septic tank system (septic tank and percolation area) (Chapter 7) �No 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) ECTED DWWIA _ Discharge Route' Waste water drained to packaged w treatment system (P6 BAF System) percolation area Propose to install: Tertiary Treatment System and Infiltration /treatment area and discharge to: { Ground Water Invert level of the trench/bed gravel or drip tubing (m) ( 99.101 Site Specific Conditions (e.g. special works, site improvement works testing etc. None 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) 1 I Percolation Area No. of Trenches Length of Trenches (m) Invert Level (m) ______ Mounded Percolation Area No. of Trenches Length of Trenches (m) 1IIIJ Invert Level (m) 1_ 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 L 1 1 Soil 1 L�� Constructed Wetland 1 1 I Lull Other I-- 1 Packaged Secondary Treatment Systems receiving raw wastewater (Chapter 9) Type 6 PE BAF System Capacity PE I6 - Sizing of Primary Compartment 3.251 m3 Polishing Filter*: (Section 10.1) Surface Area (m2)* __ I Option 3 - Gravity Discharge Trench length (m) Option 1 - Direct Discharge 75,00 Option 4 - Low Pressure Surface area (m2) 1 1 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 �✓ Hydraulic Loading Rate * (I/m2.d) I Surface Water ** Discharge Rate (m3/hr) F * Hydraulic loading rate is determined by the percolation rate of subsoil ** Water Pollution Act discharge licence required Surface area (m2) I 75.001 QUALITY ASSURANCE: Installation & Commissioning To be installed by suitably qualified installer and commissioned afterwards On -going Maintenance Client to enter into maintenance agreement with installer. Company: Horizon Group Prefix: Mr First Name: ITerence J Surname: Duffy Address: Market Square, Castleblayney, Co Monaghan Qualifications/Experience: I C. Build E MCABE, Registered Building Surveyor, Certified Site Suitability Assesor Date of Report: 112 -Jul -2024 Phone: I 042-9740671 E-mail Info®horizon-groupie _ Indemnity Insurance Number: r _ AP100042531 Ted DuffDigitally signed by Ted Duffy y Date: 20233 .05.05. 1617:35:29 Signature: +01,00, ___ Trial Hole Test Holes Test Holes Test Holes L Q co -0 z Z3 O L (D 'B I f ) ° / ) E E# o o a \( o {) §o !!� o 0 f (* Hi }{\ § !k/ kr� u � $f� � " R � k)[ k7t / 2 [§( i&& «|f CD Ra § k 0 B C) k § o e - / 0 $ c ] f ci)w § @ Co O L (D C a . 00. c k ) D) B a $ fl Co O (D s o I 0- c a, 0 C) E• • N J C) m 0 2c N O (9 N O N c C.2 E2F > O d 0 U m m <0 Q H w w 0� �E DO m s v 9 2Z7 U N E c (O � E08 won 2 O®O • E c � m N G U �CC ro O 3m om o c a cw o o ohs cU • a � EE O gcsi > � gDt '_ J O tli Em° In ry �� (p d jfl Cu Co L O L I' hi !j \, -- - $ ;27 \/; - 2 §tt k I 82§ ( & !§ 2 } 7\2 7 \ (c k \k\ L) } O(2 + 2(� ! � t § « { 2 k 3 ) c o �2 a �#§ ° ! 0.•o 7ff � (f w z ) 2 �(k 2 {�f ± @R; � !/( e f o - O k;) o ©a �--------- ----- . . . --�--- -- - � m o .�2