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Home My WebLink About2640 - Site Assessment Report3.2 Trial Hole Should be a minimum 2.10m deep Depth of Trial Hole Depth from Ground Surface to bedrock (m) if Present 2.00m BGL 1.60m None Depth of water ingress Encountered Date and Time of 02.11.20 09.00 Excavation Depth from Ground Surface to None Water Table (m) if Present I Encountered Rock Type if Present Unknown Date and Time of 04.11.20 09.30 Examination Depth of P & T Test Soil/Subsoil Texture Classification Plasticity and Dilatancy Soil Structure Density Compactness Colour Preferential Flowpaths 0.1m Depth of surface Test Depth of Subsurface Test �cm1 Sift/Clay Clay intermixed With stone Clay intermixed With stone & Shale Bedrock Ribbons 40,50.60 1,2,2Threads Ribbons 80.90.100 2,2,3 Threads Ribbons 40.50,60 2,2,2Threads Crumb Crumb Crumb Low Medium Low Brown Grey Grey 0.2m 0.3m 0.4m 0.5m 0.6m 0.7m 0.8m 0.9m 1.0m 1.1m 1.2m 1.3m 1.4m 1.5m 1.6m 1.7m 1.8m 1.9m 2.Om 2.1m 2.2m EVALUATION: Weather conditions: Mild According To The Flowchart For Describing Subsoil's based on BS5930:1999, the subsoil is best described as Clay intermixed with stone Groundwater was not encountered in the trial hole. Bedrock was encountered in the trial hole at a depth of 1.60m. Likely Subsurface Percolation <50.00 Value: min /25mm Likely Surface Percolation <50.00 Value: min /25mm 7 *Note: Depth of percolation test holes should be indicated on log above (Enter Subsurface & surface Depths as appropriate) * See Appendix E for BS5930 Classification ** 3 samples to be tested *** All signs of mottling should be recorded. 3.3a Subsurface Percolation Test for Subsoil Step 1 Test Hole Preparation Percolation Test Hole 1 2 3 Depth from ground surface I I 200 200 200 to top of hole (mm) (A)! Depth from ground surface I 600 600 600 to base of hole (mm) (B): Depth of hole (mm) (B -A): 400 400 400 Dimensions of hole [length I 300 x 300 300 x 300 300 x 300 x breadth (mm)]: I I I P Step 2 Pre -Soaking Test Holes Pre-soak Date 03.11.20 03.11.20 I 03.11.20 start Time 10.00 10.00 10.00 2"d pre-soak Date start Time 03.11.20 03.11.20 03.11.20 13.50 13.55 14.00 Each hole should be pre-soaked twice before the test is carried out. Each hole should be empty before refilling. Step 3 Measuring Tioo Percolation Test Hole 1 2 3 Date of Test 04.11.20 04.11.20 04.11.20 Time Filled to 400mm 10.00 10,00 10.00 Time Water Level at 11.34 11.37 11.45 300mm Time to drop 100mm (Tioo) 94.00 97.00 105.00 Average Tioo 98.60 If Tioo>480mins then Subsurface Percolation value >120 — site unsuitable for discharge to ground If Tioo 5 210mins then go to Step 4 If Tioo Z 210mins then go to Step 5 �Traynor 8 Step 4 Standard Method (where Tioo 5 210min) Percolation 1 Test Hole Start Finish At Fill No. Time at Time at 300mm 200mm (min) 2 Start I Finish IAt Time at Time at 300mm 200mm (min) 3 Start Finish Time at Time at At (mi) 300mm 200mm 1 11.35 13.10 95.00 11.38 13.17 99.00 11.46 13.34 108.00 13.11 14.50 99.00 13.18 15.05 107.00 13.35 15.27 112.00 14.51 16.37 106.00 15.06 16.57 111.00 15.28 I 17.24 116.00 Average At j 100.00 105.60 112.00 Average At/4 = Average At/4 = Average At/4 = 25.00 26.42 28.00 [Hole No. 1] [Hole No. 2] [Hole No. 2] Result of Test: Subsurface 26.47 min/25mm Percolation Value: Comments Result of Subsurface Percolation: 26.47min/25mm. Good Percolation Characteristics of the Subsoil Material. Tray nor (� rn. r,�.,.e!�U1 , 7 3.3bSurface Percolation for Soil Step 1 Test Hole Preparation Percolation Test Hole 1 2 I I____________________ 0 0 I 0 Depth from ground surface I to top of hole (mm) (A): Depth from ground surface I 400 400 400 to base of hole (mm) (B): Depth of hole (mm) (B -A): 400 400 400 Dimensions of hole [length x I 300 x 300 300 x 300 300 x 300 breadth (mm)]: Step 2 Pre -Soaking Test Holes Pre-soak Date 03.11.20 03.11.20 03.11.20 start Time 10.05 10.05 10.05 2nd pre-soak Date 03.11.20 03.11.20 03.11.20 start Time 13.35 13.40 13.45 Each hole should be pre-soaked twice before the test is carried out. Each hole should be empty before refilling. Step 3 Measuring Two Percolation Test Hole 1 2 I I 3 04.11.20 04.11.20 04.11.20 Date of Test 10.05 10.05 10.05 Time Filled to 400mm 11.11 11.06 11.02 Time Water Level at 300mm Time to drop 100mm 57.00 61.00 66.00 (Pion) Average Two 61.30 If Two >480 minutes then Surface Percolation value >90 — site unsuitable for discharge to ground If Tioo ≤ 210mins then go to Step 4 If Tioo≥ 210mins then go to Step 5 Traynor Step 4 Standard Method (where Two 5 210min) Percolation 1 Test Hole Start Finish At Fill No. Time at Time at 300mm 200mm (min) 2 Start Finish I At Time at I Time at 300mm 200mm (min) 3 Start Finish Time at Time at At (min) 300mm 200mm 1 11.03 12.03 60.00 11.07 12.11 64.00 11.12 12.23 71.00 2 12.04 13.08 64.00 12.12 13.21 69.00 12.24 13.40 76.00 13.09 14.19 70.00 13.22 14.37 I 75.00 13.41 15.04 I 83.00 Average At 64.60 69.30 76.60 Average At/4 = Average At/4 = Average At/4 = 16.16 17.30 19.16 [Hole No. 1] [Hole No. 2] [Hole No. 2] Result of Test ; Surface Percolation 17.54 min/25mm Value Comments Result of Surface Percolation: 17.54m1n/25mm. Good Percolation Characteristics of the Surface Material. Traynor In...ngn,uUI 11 4.0 CONCLUSIONS of SITE CHARACTERISATION: 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 Are all minimum separation distance met? Depth of unsaturated soil and/or subsoil beneath invert of gravel (or drip tubing in the case of drip dispersal system) Percolation test results: Surface Not suitable for Development Identify all suitable options 17.54min/25mm Sub -surface: Suitable for Development 1.200 Yes 0.90m 26.47min/25mm Discharge Route 1. Septic tank System (Septic tank and percolation area) Groundwater (Chapter 7) 2. Secondary Treatment System (Chapters 8 and 9) and soil polishing filter (Section 10.1) 3. Tertiary Treatment System and Infiltration/treatment area 7 (Section 10.2) 5.0 RECOMMENDATION: Traynor Environmental recommends that O' Reilly Oakstown Treatment System or Propose to install similar EN certified system, Sand Filter (15m2) and gravel distribution layer (60m2) is installed in accordance with EPA guidelines 2021. And discharge to Groundwater invert level of the trench/bed I 0.40m Above Ground Level (AGL) gravel or drip tubing (m) Site Specific Conditions (if any) e.g. special works, Site Improvement Works, Testing etc. The tests showed that the site has a "T" value rating of 26.47min/25mm indicating average percolation characteristics of the subsoil. A "p" value rating of 17.54min/25mm was attained indicating average percolation characteristics of the topsoil. Groundwater level was not encountered in the trial hole. Bedrock was encountered In the trial hole at 1.60m BGL A purpose-built sand polishing filter should be constructed to ensure that there is a minimum of 0.90m of suitable percolating material between the base of the lowest part of the sand polishing filter and Groundwater/ Bedrock at all times. The distribution pipes used in this system will be smooth walled, have a diameter of 32mm, have 8mm holes drilled in them 300mm apart, and each pipe should be spaced parallel and 600mm apart. Traynor Environmental Ltd also recommends that the O' Reilly Oakstown Treatment System and polishing filter construction is overseen by a suitable qualified and accredited person. Traynor Cross sectio \� $ ) a k) ` \ \ . ! a f f k k F F � • : ; ; � \ ira!«.� ^�' 13 Plan View w U- Irnrn��r 14 w H - C 0 tTh H — W w C C r LL 0 6.0 TREATMENT SYSTEM DETAILS SYSTEM TYPE: Septic Tank System (Chapter 7) Tank Capacity (m2) N/A Percolation Area Mound Percolation Area No. of Trenches N/A No. of Trenches N/A Length of Trenches (m) N/A Length of Trenches (m) N/A Invert Level (m) N/A Invert Level (m) N/A SYSTEM TYPE: Secondary Treatment System (Chapters 8 and 9) and polishing filter (Section 10.1) Secondary Treatment Systems receiving septic tank effluent (Chapter 8) I Package Treatment Systems Media Type Area (mzInvert Level receiving raw wastewater ) Deep of Filter (m) (m) (Chapter 9) Sand/Soil N/A N/A N/A Type O'Reilly Oakstown Treatment System Soil N/A N/A N/A Capacity PE 8 Constructed Wetland N/A N/A N/A Sizing of Primary Compartment Other N/A N/A N/A 4 mz Polishing Filter: (Section 10.1) Surface Area Sand Filter (m2) 15 No. of Trenches N/A Option 1— Direct Discharge Surface area (m2) 60 Length of Trenches (m) N/A Option 2 — Pumped Discharge Surface Area (m2) N/A Invert Level (m) 0.40m AGL SYSTEM TYPE: O'Reilly Oakstown Treatment System and infiltration/ treatment area (section 10.2) Provide performance information Provide design information Identify purpose of tertiary treatment demonstrating system will provide required treatment levels O'Reilly Oakstown Treatment System And Sand Polishing Filter With Gravel Layer DISCHARGE ROUTE: Groundwater Hydraulic Loading Rate (I/m2. d) 900 Surface Area (m2) Surface Water Discharge Rate (m3/hr) 0.009 QUALITY ASSURANCE: Installation & Commissioning On -going Maintenance Recommend to be overseen by plant supplier. Maintain and de -sludge annually Troynor r ,,i! iji 15 7.0 SITE ASSESSOR DETAILS Company: Traynor Environmental Ltd Prefix: Mr. First Name: Nevin Surname: Traynor Address: Qualifications/Experience: Belturbet Business Park, Creeny, Belturbet, Co. Cavan. BSc. Env, H.Dip l.T, Cert SHWW, EPA/FAS Course Certified Professional Indemnity Insurance Holder (€1 million cover) Date of Report: 18.08.21 Phone: 049 9522236 Fax: 049 9522808 E-mail: nevin@traynorenvironmental.com Indemnity Insurance Number: 20/1/04786 (Renewed 12th July 2021) Signed: Nevin Traynor BSc. Env, H.Dip I. T, Cert SHWW, EPA/FAS Cert. For Traynor Environmental Ltd Traynor _„, 16 8.0 SITE PHOTOGRAPHS Facing North From the Facing East From the Trial Hole Excavation Trial Hole Excavation J y Y J S'i !+ 4 ; xS`e' t a 4'k Y r M '" }r . ri ._� ; :y r •� y r r o ' G. . r. Facing South From the Facing West From the Trial Hole Excavation Trial Hole Excavation L,VILJ ____ Jrrk 4� Tr _ kkY ;� r 3 aS 1 9 ij I Trial Hole - Front View Trial Hole - Side View ,r r y'i.Y1 .q kl'2' i,_r}y� `' it ✓rSy l ,,. l 4•ti''SC" •, v ` � �5w�, i $��~� � ' � A`r�'tnA }t+S-`�X��''tVFt"t'�:,Ap t t� Traynor 17 �J mmm - Percolation ("Subsurface") Test 2 Percolation ("Subsurface") Test 3 Il Traynor 'o'thJ, 18 Maps Used As Part of the EPA Site Suitability Assessment Groundwater/Aquifer Map From the GSI Groundwater Aquifer Map Site is classified as Poor Aquifer - Bedrock which is Generally Unproductive except for Local Zones Vulnerability Map From the GS/ Vulnerability Map Site is classified as Extreme Tray nor Bedrock Map From the GSI Bedrock Map Site is classified as OM - Ordovician Metasediments Teagasc Subsoil Map 4 I'. From the Teagasc Subsoil Map Site is classified as Fine loamy over limestone bedrock Traynor ,,.., 20 10.0 P.1 INSURANCE GIUNIN A Anrtour Europe DAC Alexandra HLuxe +353 [)))16€4 14G9 The 2.wepora e6 +353 (dlt 5.:d 9001 aNI5Gtlt$j2 t.."ti3i_Y'�1'"?Lt163nd:+rT}Y�JrIC-91 C'Jt:r14 glltfir*.aiJ,t.T} C}r.ccnl PROFESSIONAL INDEMNITY INSURANCE Griffiths Armour We confirm the following details relating to our client's Professional Indemnity Insurance: Insured: Traynor Environmental Ltd Address: Belturbet Business Park Creeny Belturbet Co. Cavan H 14AY04 Lead Insurer(s}: Axis Specialty Europe SE Period of Insurance: 12 July 2021 to 11 July 2022 Policy Number: 2WI104786 Limit of Indemnity: €1,500,000 any one claim and unlimited in the period of insurance Signed: Graeme Tinney Chief Executive Officer Griffiths & Armour Europe DAC Date: 22 June 2021 The policy is subject to the insuring agreements, exceptions, exclusions. Imitations. oonditons and declarations contained therein- The above is accurate at the date of signature. No obligation is imposed herein on the signatory to advise of any alteration. C'!^.cci•,r.: 0 T.nney CE'e,r U,b Q J 00,311e) kvf? T cc l r r,-FAK.-vet RV- :term In Irelaa] r4a_ a;3L'^C^-. F.earrenti 0n}[e: v i$ Le ICS Furze ricad S3r.4 rC.4 Ct5} In !3 !reiyfl Cr tTCe 3 Am'kar EvcFc CIedAittity C"Twj 1, req i5!ea L•j the Central 83nt f }215'x:: nm.... Traynor I liJ.z 22 PROPOSAL FOR O'REILLY OAKSTOWN TREATMENT SYSTEM PREPARED FOR GERARD O'CALLAGHAN CORNAPASTE SCOTSHOUSE CO. MONAGHAN r,ay„o, 23