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Home My WebLink About2660126 - Drainage Network DrawingsA L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Drainage & Site Services Proposals, Calculations, Longitudinal Sections and Standard Construction Details for Proposed Residential Development at Killyconnigan, Monaghan, Co Monaghan for Mr Gareth Treanor Rev P1 January 2026 RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Proposed Residential Development at Killyconnigan, Monaghan, Co. Monaghan for Mr Gareth Treanor Introduction The location of the proposed development is situated on a predominately greenfield site located at Killyconnigan, Monaghan on the western side of Monaghan town. An existing derelict dwelling house is located at the southwestern end of the site, and it is proposed to demolish the existing building as part of the development. The development will consist of 12No. dwelling houses comprising a mix of detached and semi-detached houses. The associated siteworks will include provision of a new access road to the houses with a new entrance from the Cortolvin road, and all associated watermains, and foul and surface water drainage and connections to existing services in the public road. This document provides details and calculations relating to the proposed site services and should be read in conjunction with the drawings which form part of this planning application that indicate the layouts, routes, and levels etc. for the proposed site services. Water Demand Calculation The water demand associated with the development is based on bedroom numbers per dwelling unit. It is proposed that a new watermain will be provided from the existing watermain located in the Cortolvin road to serve these new dwelling houses and to provide for fire hydrants in the hardstanding area in front of the new houses. The calculated 24-hour water storage volume is based on Technical Guidance Document G (Dept of Environment, Community and Local Government) recommended figures for residential storage volumes. 24 Hour Water Storage In accordance with the requirements of Section 1, §1.6 of Technical Guidance Document G (Dept of Environment, Community and Local Government), a minimum of 340litres of cold water storage should be provided for dwelling houses containing 4 or more bedrooms. All of the houses in this development will have 4 bedrooms or less, therefore it is proposed to provide a one-piece water tank (based on Tricel capacities) 0.61m high x 1.31m long x 0.68m wide. Nominal tank capacity = 454 litres Foul Sewer Calculations The new foul sewer pipe network serving the proposed development will discharge to an existing 225mm diameter concrete foul sewer pipe located in the public road, at the east of the site. The pipe network has been designed based on a flow rate of 4000 litres per day for each dwelling house plus and additional allowance for infiltration and surface water cross- connections as required by Irish Water Codes of Practice. The foul sewer drainage network has been modelled using the Causeway Flow design software. The discharge from the houses has been applied to the drainage network at the appropriate manhole locations. The pipe design verifies the adequacy of the proposed gravity sewer network within the proposed development. RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Refer to appended foul sewer calculations (from Causeway Design software) demonstrating the adequacy of the proposed pipe sizes and gradients for the above loadings. The calculations include a detailed hydraulic analysis of the foul sewer system and verify that the gradients and pipe sizes will produce flow velocities in the range 0.75m/s to 2.5m/s. The site layout drawing (26104-500) indicates the proposed foul sewer layout. Surface Water / SuDS Calculations An existing 300mm diameter public storm water pipe is located in the public road to the east of the site. It is proposed to convey the surface water run-off from the site via new 225mm diameter uPVC pipes laid below the proposed access road. The new surface water pipe network will discharge to a new surface water manhole constructed on the 300mm diameter public surface water pipe in the public road. It is proposed to provide a new surface water pipe network within the site to serve the proposed new dwelling units and associated parking and hardstanding areas. The proposed surface water drainage for the site has been designed using the principles of sustainable drainage systems (SuDS). The objective of this approach is to safely deal with run-off from extreme storm events, without putting public or property at risk, and avoid any increase in the pre-development flood risk associated with the receiving water course. The volume of surface water discharging via the new piped sewer network from the roof and associated hardstanding areas will be restricted to pre-development runoff rates and excess surface water will be stored in below ground attenuation chambers. The attenuation chambers will also facilitate infiltration of the stored surface water to ground which will further reduce the volume of surface water discharging from the site. Calculations are appended to this report in order to demonstrate the adequacy of the pipe sizes and gradients. These calculations have been carried out based on the following parameters and include a 20% increase in rainfall intensities to allow for climate change. Surface Water Runoff Coefficients The following runoff coefficients have been applied as follows in the calculation of the run-off from the various areas of the site: Roof – 0.90 Roads – 0.85 Permeable Paving – 0.65 Contributing Areas Proposed Roof 697m2 x 0.90 x 1.10 = 690m2 Roads 792m2 x 0.85 = 673m2 Permeable Paving 894m2 x 0.65 = 581m2 Note that the calculated impermeable area for roofs has been factored up by 10% to allow for urban creep, as required by the GDSDS – see below. Hydraulic Criteria Hydraulic Criteria will be met by controlling the run-off as near to source as possible. Source control measures which will be adopted on this site include permeable paving and infiltration. The proposed permeable paving, perforated drainage pipes laid below the permeable paved areas, and attenuation chambers will allow for infiltration to the existing subsoils to occur. However, the design of the conveyance system has conservatively ignored the reduction in run-off which will be achieved through infiltration. RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Site control will be incorporated in the system in the form of attenuation storage. Regional control would need to be managed for the local area as a whole on a co-ordinated basis. The storm water sewer network has been designed to contain the 1:100 year storm event in the below ground attenuation system within the site ensuring that no flood water discharges from the site in the 1:100 year storm event. In order to calculate the required capacity of the control and storage measures to be incorporated in the drainage system, it is necessary to calculate the green field run-off rate appropriate to the site. Calculate Mean Annual Flood Flow/Green Field Run-off Rates (Qbar) The calculation of greenfield runoff estimation for the site has been carried out using HR Wallingford software and is appended to this document. The calculation indicates the following run-off rates; Qbar for 1 year return period = 2.9 l/sec Qbar for 30 year return period = 5.7 l/sec Qbar for 100 year return period = 6.7 l/sec Attenuation Volume for the Proposed Development Site The storage volumes for the 30 year and 100 year return periods have been estimated by the design software and subsequent simulation modelling of the storm network has been carried out for the appropriate rainfall intensities for 1 year, 30 year and 100 year return periods using the appropriate Qbar figures, and the adequacy of the attenuation volume has been verified. The results of the modelling calculation for each return period is appended to this report. All rainfall intensities have been factored up by 20% to allow for climate change, as required by the Greater Dublin Strategic Drainage Study (GDSDS). The areas discharging into each manhole/node in the drainage model have been increased by an additional 10% to provide for future urban creep (due to possible future extensions to the houses and/or increases in the extent of paved areas around the houses) in accordance with the recommendations of the GDSDS. The GDSDS requires that no site flooding occurs for the 1 in 30 year storm event and that any site flooding for the 1 in 100 year storm event is contained within the site and that properties are protected from flooding (i.e. that flood levels are greater than 500mm below building floor levels). The storm simulation calculation results indicate some surcharging of some manholes within the storm network for the 1 in 30 year storm and the 1 in 100 year storm intensities which is normal for these extreme storm event. These water levels remain within the manholes for these rainfall events and the water level is greater than 500mm below the lowest floor level as required by the GDSDS. No site flooding is observed in the simulation results. It is proposed to contain all attenuated storm water in the below ground attenuation system. The required storage to ensure that no site flooding occurs for the 1 in 100 year storm is 101.76m3. This storage is provided entirely within the below ground attenuation chambers which will consist of 48No. Stormtech SC-740 underground stormwater chambers (or similar approved), as shown on the site layout drawing. Technical details for these chamber types are appended to this report. This type of chamber has been selected due to their ease of maintenance and the capacity to incorporate an ‘isolator row’ which provides for the removal of suspended solids and improved water quality. The chambers are bedded, surrounded and covered with single sized stone and each have a storage capacity of 2.12m3; 48No. chambers having a storage capacity of 101.76m3. RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie The above calculations conservatively ignore the infiltration rates through the base and sides of the attenuation system. The attenuation chambers are configured in an ‘on-line’ arrangement, as indicated on the site layout drawing, which best suits the site and drainage layout and facilitates the incorporation of an isolator row which allows for the removal of suspended solids from the discharged storm water flows. The chambers dissipate stored storm waters via a manhole with a flow restrictor at its outlet. The hydrobrake flow restrictor fitted to the downstream manhole on the attenuation system restricts the outflow to the predetermined runoff rate of 2.9 l/sec for the overall site based on the design depth for the 1 in 1 year storm event and the modelling and storm simulations for both the 1 in 30 year and 1 in 100 years storm events indicate that the discharge from the site does not exceed the calculated greenfield run-off rates for these return periods. Surface Water Pipe Capacities & Flow Velocities The surface water pipe network has been modelled and designed based on the proposed layout and the areas of building and site served by each pipe run. The network has been designed using the Causeway Flow design software and design calculations verifying the pipe sizes, gradients, capacities, flow velocities etc, are appended to this report. The proposed site layout drawing (26104-500 Rev P1) indicates the arrangement of the proposed surface water sewer network including the locations of the flow restrictor and the attenuation chambers. Refer to appended surface water sewer calculations (from Causeway Design software) demonstrating the adequacy of the proposed pipe sizes and gradients for the above loadings. The calculations include a detailed hydraulic analysis of the surface water sewer system and verify that the gradients and pipe sizes will produce flow velocities in excess of the minimum self-cleansing velocity of 0.75m/s and less than 3.0l/sec. Oil Interceptor The run-off from the site hardstanding, macadam road and permeable paved areas of the site will dissipate via the permeable paving and road gullies and the entirety of the storm water will pass through a Class 1 bypass oil interceptor (Kingspan Klargester NSBP004 or similar) prior to discharge at the outfall manhole. The oil interceptor has been sized to provide adequate capacity to deal with the runoff from the entire site. The NSBP004 interceptor has capacity to cater for the calculated flow rate as indicated in the appended calculations. Surface Water Sewer Outfall The outflow from the attenuation chambers will be restricted by means of Hydrobrake vortex flow control at the downstream manhole of the attenuation system as indicated on the site layout drawing, as referred to above, to limit the discharge flow rate from the site to the existing storm water pipe in the public road to the calculated pre-development greenfield run- off rate. RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Appendix 1 Foul Sewer Design Calculations RECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Foul Network 1 Alan Clarke 22/01/2026 Page 1 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Design Seƫngs Frequency of use (kDU) Flow per dwelling per day (l/day) DomesƟc Flow (l/s/ha) Industrial Flow (l/s/ha) AddiƟonal Flow (%) 0.50 4000 0.0 0.0 10 Minimum Velocity (m/s) ConnecƟon Type Minimum Backdrop Height (m) Preferred Cover Depth (m) Include Intermediate Ground 0.75 Level Soĸts 0.200 1.200 ✓ Nodes Name Dwellings Cover Level (m) Node Type Diameter (mm) EasƟng (m) Northing (m) Depth (m) Invert Level (m) 1 7 2 3 4 5 6 4 1 2 2 3 79.750 78.000 79.000 77.750 76.750 76.750 75.550 Manhole Manhole Manhole Manhole Manhole Manhole Manhole 1200 1200 1200 1200 1200 1200 1200 84.069 71.400 67.713 46.850 25.987 27.816 8.622 42.719 26.049 37.410 30.638 23.865 18.232 12.001 1.500 1.350 2.550 1.666 1.350 1.850 1.350 78.250 76.650 76.450 76.084 75.400 74.900 74.200 Links Name US Node DS Node Length (m) ks (mm) / n US IL (m) DS IL (m) Fall (m) Slope (1:X) Dia (mm) Name US Node DS Node Vel (m/s) Cap (l/s) Flow (l/s) US Depth (m) DS Depth (m) Σ Area (ha) Σ Units (ha) Pro Depth (mm) Pro Velocity (m/s) 1.000 1 2 17.196 0.060 78.250 77.650 0.600 28.7 150 1.000 1 2 2.431 43.0 0.2 1.350 1.200 0.000 0.0 7 0.617 2.000 7 2 11.944 0.060 76.650 76.450 0.200 59.7 150 2.000 7 2 1.658 29.3 0.1 1.200 2.400 0.000 0.0 5 0.312 1.001 2 3 21.935 0.060 76.450 76.084 0.366 59.9 150 1.001 2 3 1.655 29.3 0.4 2.400 1.516 0.000 0.0 11 0.558 1.002 3 4 21.935 0.060 76.084 75.400 0.684 32.1 150 1.002 3 4 2.294 40.5 0.5 1.516 1.200 0.000 0.0 11 0.784 1.003 4 5 5.922 0.060 75.400 75.360 0.040 148.1 150 1.003 4 5 1.027 18.2 0.6 1.200 1.240 0.000 0.0 19 0.477 1.004 5 6 20.180 0.060 74.900 74.200 0.700 28.8 150 1.004 5 6 2.424 42.8 0.6 1.700 1.200 0.000 0.0 13 0.885 Pipeline Schedule Link Length (m) Slope (1:X) Dia (mm) Link Type US CL (m) US IL (m) US Depth (m) DS CL (m) DS IL (m) DS Depth (m) Link US Node Dia (mm) Node Type MH Type DS Node Dia (mm) Node Type MH Type 1.000 17.196 28.7 150 Circular_Default Sewer Type 79.750 78.250 1.350 79.000 77.650 1.200 1.000 1 1200 Manhole Adoptable 2 1200 Manhole Adoptable 2.000 11.944 59.7 150 Circular_Default Sewer Type 78.000 76.650 1.200 79.000 76.450 2.400 2.000 7 1200 Manhole Adoptable 2 1200 Manhole Adoptable 1.001 21.935 59.9 150 Circular_Default Sewer Type 79.000 76.450 2.400 77.750 76.084 1.516 1.001 2 1200 Manhole Adoptable 3 1200 Manhole Adoptable 1.002 21.935 32.1 150 Circular_Default Sewer Type 77.750 76.084 1.516 76.750 75.400 1.200 1.002 3 1200 Manhole Adoptable 4 1200 Manhole AdoptableRECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Foul Network 1 Alan Clarke 22/01/2026 Page 2 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Pipeline Schedule Link Length (m) Slope (1:X) Dia (mm) Link Type US CL (m) US IL (m) US Depth (m) DS CL (m) DS IL (m) DS Depth (m) Link US Node Dia (mm) Node Type MH Type DS Node Dia (mm) Node Type MH Type 1.003 5.922 148.1 150 Circular_Default Sewer Type 76.750 75.400 1.200 76.750 75.360 1.240 1.003 4 1200 Manhole Adoptable 5 1200 Manhole Adoptable 1.004 20.180 28.8 150 Circular_Default Sewer Type 76.750 74.900 1.700 75.550 74.200 1.200 1.004 5 1200 Manhole Adoptable 6 1200 Manhole AdoptableRECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Appendix 2 Surface Water Sewer Design Calculations and Storm Simulation Results RECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Storm Network 1 Alan Clarke 22/01/2026 Page 1 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Design Seƫngs Rainfall Methodology Return Period (years) AddiƟonal Flow (%) FSR Region M5-60 (mm) RaƟo-R CV Time of Entry (mins) FSR 1 0 Scotland and Ireland 16.400 0.271 1.000 5.00 Maximum Time of ConcentraƟon (mins) Maximum Rainfall (mm/hr) Minimum Velocity (m/s) ConnecƟon Type Minimum Backdrop Height (m) Preferred Cover Depth (m) Include Intermediate Ground Enforce best pracƟce design rules 30.00 50.0 1.00 Level Soĸts 0.200 1.200 ✓ ✓ Nodes Name Area (ha) T of E (mins) Cover Level (m) Node Type Diameter (mm) EasƟng (m) Northing (m) Depth (m) Invert Level (m) 1 6 2 3 4 5 0.050 0.030 0.098 0.016 5.00 5.00 5.00 5.00 79.750 78.000 79.000 77.250 77.250 75.550 Manhole Manhole Manhole Manhole Manhole Manhole 1200 1200 1200 1200 1200 1200 84.897 72.385 66.161 29.826 31.807 5.479 40.168 14.911 34.086 22.291 16.187 7.640 2.050 1.425 2.579 1.890 2.775 1.425 77.700 76.575 76.421 75.360 74.475 74.125 Links Name US Node DS Node Length (m) ks (mm) / n US IL (m) DS IL (m) Fall (m) Slope (1:X) Dia (mm) T of C (mins) Rain (mm/hr) Name US Node DS Node Vel (m/s) Cap (l/s) Flow (l/s) US Depth (m) DS Depth (m) Σ Area (ha) Pro Depth (mm) Pro Velocity (m/s) 1.000 1 2 19.698 0.060 77.700 77.536 0.164 120.0 225 5.22 39.4 1.000 1 2 1.490 59.2 7.1 1.825 1.239 0.050 52 1.014 2.000 6 2 20.160 0.060 76.575 76.496 0.079 255.2 225 5.34 39.0 2.000 6 2 1.000 39.8 4.2 1.200 2.279 0.030 50 0.657 1.001 2 3 38.201 0.060 76.421 75.600 0.821 46.5 300 5.55 38.5 1.001 2 3 2.923 206.6 24.8 2.279 1.350 0.178 69 2.005 1.002 3 4 6.417 0.060 75.360 75.339 0.021 305.6 300 5.65 38.2 1.002 3 4 1.094 77.3 26.8 1.590 1.611 0.194 122 0.997 1.003 4 5 27.681 0.060 74.475 74.125 0.350 79.1 225 5.90 0.0 1.003 4 5 1.853 73.7 0.0 2.550 1.200 0.194 0 0.000 Pipeline Schedule Link Length (m) Slope (1:X) Dia (mm) Link Type US CL (m) US IL (m) US Depth (m) DS CL (m) DS IL (m) DS Depth (m) Link US Node Dia (mm) Node Type MH Type DS Node Dia (mm) Node Type MH Type 1.000 19.698 120.0 225 Circular_Default Sewer Type 79.750 77.700 1.825 79.000 77.536 1.239 1.000 1 1200 Manhole Adoptable 2 1200 Manhole Adoptable 2.000 20.160 255.2 225 Circular_Default Sewer Type 78.000 76.575 1.200 79.000 76.496 2.279 2.000 6 1200 Manhole Adoptable 2 1200 Manhole Adoptable 1.001 38.201 46.5 300 Circular_Default Sewer Type 79.000 76.421 2.279 77.250 75.600 1.350 1.001 2 1200 Manhole Adoptable 3 1200 Manhole Adoptable 1.002 6.417 305.6 300 Circular_Default Sewer Type 77.250 75.360 1.590 77.250 75.339 1.611 1.002 3 1200 Manhole Adoptable 4 1200 Manhole AdoptableRECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Storm Network 1 Alan Clarke 22/01/2026 Page 2 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Pipeline Schedule Link Length (m) Slope (1:X) Dia (mm) Link Type US CL (m) US IL (m) US Depth (m) DS CL (m) DS IL (m) DS Depth (m) Link US Node Dia (mm) Node Type MH Type DS Node Dia (mm) Node Type MH Type 1.003 27.681 79.1 225 Circular_Default Sewer Type 77.250 74.475 2.550 75.550 74.125 1.200 1.003 4 1200 Manhole Adoptable 5 1200 Manhole Adoptable SimulaƟon Seƫngs Rainfall Methodology Rainfall Events FSR Region M5-60 (mm) RaƟo-R Summer CV Winter CV Analysis Speed Skip Steady State FSR Singular England and Wales 16.400 0.271 1.000 1.000 Normal ✓ Drain Down Time (mins) AddiƟonal Storage (m³/ha) StarƟng Level (m) Check Discharge Rate(s) 1 year (l/s) 30 year (l/s) 100 year (l/s) Check Discharge Volume 100 year 360 minute (m³) 240 20.0 ✓ 2.9 5.7 6.7 ✓ Storm DuraƟons 15 30 60 120 180 240 360 480 600 720 960 1440 Return Period (years) Climate Change (CC %) AddiƟonal Area (A %) AddiƟonal Flow (Q %) 1 30 100 20 20 20 0 0 0 0 0 0 Pre-development Discharge Rate Site Makeup GreenĮeld Method PosiƟvely Drained Area (ha) SAAR (mm) Soil Index SPR Region Growth Factor 1 year GreenĮeld IH124 1 0.10 1 0.85 Growth Factor 30 year Growth Factor 100 year BeƩerment (%) QBar Q 1 year (l/s) Q 30 year (l/s) Q 100 year (l/s) 1.95 2.48 0 Pre-development Discharge Volume Site Makeup GreenĮeld Method PosiƟvely Drained Area (ha) Soil Index SPR CWI GreenĮeld FSR/FEH 1 0.10 Return Period (years) Climate Change (%) Storm DuraƟon (mins) BeƩerment (%) PR Runoī Volume (m³) 100 0 360 0RECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Storm Network 1 Alan Clarke 22/01/2026 Page 3 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Node 4 Online Hydro-Brake® Control Flap Valve Replaces Downstream Link Invert Level (m) Design Depth (m) Design Flow (l/s) x x 74.475 1.000 2.9 ObjecƟve Sump Available Product Number Min Outlet Diameter (m) Min Node Diameter (mm) (HE) Minimise upstream storage ✓ CTL-SHE-0081-2900-1000-2900 0.100 1200 Node 4 Depth/Area Storage Structure Base Inf Coeĸcient (m/hr) Side Inf Coeĸcient (m/hr) 0.00000 0.00000 Safety Factor Porosity 2.0 1.00 Invert Level (m) Time to half empty (mins) 74.475 Depth (m) Area (m²) Inf Area (m²) Depth (m) Area (m²) Inf Area (m²) Depth (m) Area (m²) Inf Area (m²) 0.000 133.5 0.0 0.762 133.5 0.0 0.763 0.0 0.0RECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Storm Network 1 Alan Clarke 22/01/2026 Page 4 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Results for 1 year +20% CC CriƟcal Storm DuraƟon. Lowest mass balance: 99.91% Node Event US Node Peak (mins) Level (m) Depth (m) InŇow (l/s) Node Vol (m³) Flood (m³) Status Link Event (Upstream Depth) US Node Link DS Node Ouƞlow (l/s) Velocity (m/s) Flow/Cap Link Vol (m³) Discharge Vol (m³) 15 minute summer 1 10 77.753 0.053 7.7 0.0857 0.0000 OK 15 minute summer 1 1.000 2 7.6 1.116 0.128 0.1343 15 minute summer 6 10 76.624 0.049 4.6 0.0757 0.0000 OK 15 minute summer 6 2.000 2 4.5 0.741 0.113 0.1229 15 minute summer 2 10 76.492 0.071 27.2 0.1337 0.0000 OK 15 minute summer 2 1.001 3 26.8 2.206 0.130 0.4664 15 minute summer 3 11 75.493 0.133 29.3 0.1731 0.0000 OK 15 minute summer 3 1.002 4 29.4 1.071 0.380 0.1760 480 minute summer 4 296 74.671 0.196 7.3 26.3234 0.0000 OK 480 minute summer 4 1.003 5 2.7 0.980 0.037 0.0775 52.0 480 minute summer 5 296 74.153 0.028 2.7 0.0000 0.0000 OKRECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Storm Network 1 Alan Clarke 22/01/2026 Page 5 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Results for 30 year +20% CC CriƟcal Storm DuraƟon. Lowest mass balance: 99.93% Node Event US Node Peak (mins) Level (m) Depth (m) InŇow (l/s) Node Vol (m³) Flood (m³) Status Link Event (Upstream Depth) US Node Link DS Node Ouƞlow (l/s) Velocity (m/s) Flow/Cap Link Vol (m³) Discharge Vol (m³) 15 minute summer 1 10 77.786 0.086 18.7 0.1397 0.0000 OK 15 minute summer 1 1.000 2 18.5 1.403 0.312 0.2593 15 minute summer 6 10 76.654 0.079 11.2 0.1224 0.0000 OK 15 minute summer 6 2.000 2 11.0 0.941 0.277 0.2372 15 minute summer 2 10 76.536 0.115 66.0 0.2181 0.0000 OK 15 minute summer 2 1.001 3 65.4 2.778 0.317 0.9018 15 minute summer 3 10 75.592 0.232 71.4 0.3014 0.0000 OK 15 minute summer 3 1.002 4 71.0 1.334 0.918 0.3412 480 minute summer 4 344 75.001 0.526 15.9 70.7539 0.0000 SURCHARGED 480 minute summer 4 1.003 5 2.9 0.996 0.039 0.0806 97.7 60 minute summer 5 99 74.153 0.028 2.9 0.0000 0.0000 OKRECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Storm Network 1 Alan Clarke 22/01/2026 Page 6 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Results for 100 year +20% CC CriƟcal Storm DuraƟon. Lowest mass balance: 99.84% Node Event US Node Peak (mins) Level (m) Depth (m) InŇow (l/s) Node Vol (m³) Flood (m³) Status Link Event (Upstream Depth) US Node Link DS Node Ouƞlow (l/s) Velocity (m/s) Flow/Cap Link Vol (m³) Discharge Vol (m³) 15 minute summer 1 10 77.800 0.100 23.9 0.1616 0.0000 OK 15 minute summer 1 1.000 2 23.6 1.490 0.399 0.3124 15 minute summer 6 10 76.666 0.091 14.3 0.1406 0.0000 OK 15 minute summer 6 2.000 2 14.1 1.002 0.355 0.2849 15 minute summer 2 10 76.555 0.134 84.5 0.2525 0.0000 OK 15 minute summer 2 1.001 3 83.7 2.947 0.405 1.0879 15 minute summer 3 10 75.655 0.295 91.3 0.3834 0.0000 OK 15 minute summer 3 1.002 4 90.7 1.381 1.174 0.4143 360 minute winter 4 344 75.224 0.749 16.7 100.8869 0.0000 SURCHARGED 360 minute winter 4 1.003 5 2.9 0.996 0.039 0.0806 79.8 60 minute winter 5 36 74.153 0.028 2.9 0.0000 0.0000 OKRECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Appendix 3 HR Wallingford Greenfield Runoff Rate Calculation RECEIVED: 02/04/2026 Greenfield runoff rate estimation tool www.uksuds.com | Greenfield runoff rate estimation tool (https://www.uksuds.com/) This is an estimation of the greenfield runoff rates that are used to meet normal best practice criteria in line with Environment Agency guidance “Rainfall runoff management for developments”, SC030219 (2013), the SuDS Manual C753 (CIRIA, 2015) and the non- statutory standards for SuDS (Defra, 2015). This information on greenfield runoff rates may be the basis for setting consents for the drainage of surface water runoff from sites. Project details Date Calculated by Reference Model version Location Site name Site location Site easting (Irish Grid) Site northing (Irish Grid) Site easting (Irish Transverse Mercator) Site northing (Irish Transverse Mercator) Site details Total site area (ha) Greenfield runoff Method Method IH124 My value Map value SAAR (mm)1016 How should SPR be derived? WRAP soil type 4 SPR QBar (IH124) (l/s) Growth curve factors My value Map value Hydrological region 13 1 year growth factor 2 year growth factor 10 year growth factor 30 year growth factor 100 year growth factor 200 year growth factor Results Method Flow rate 1 year (l/s) Flow rate 2 year (l/s) Flow rate 10 years (l/s) Flow rate 30 years (l/s) Flow rate 100 years (l/s) Flow rate 200 years (l/s) Please note runoff estimation is subject to significant uncertainty. Results are therefore normally reported to only 1 decimal place. Where 2 decimal places are provided, this does not indicate accuracy to this level, it has been adopted to prevent ‘zero’ figures from being reported. Outputs less than 0.01 l/s are reported as 0.01 l/s. Disclaimer This report was produced using the Greenfield runoff rate estimation tool (2.2.2) developed by HR Wallingford and available at uksuds.com (https://www.uksuds.com/). The use of this tool is subject to the UK SuDS terms and conditions and licence agreement, which can both be found at uksuds.com/terms-conditions (https://www.uksuds.com/terms-conditions). The outputs from this tool have been used to estimate Greenfield runoff rates. The use of these results is the responsibility of the users of this tool. No liability will be accepted by HR Wallingford, the Environment Agency, Centre for Ecology and Hydrology, Wallingford Hydrosolutions or any other organisation for the use of these data in the design or operational characteristics of any drainage scheme. + – © OpenStreetMap (https://www.openstreetmap.org/copyright) contributors. ha IH124 mm WRAP soil type 4 l/s 13 l/s l/s l/s l/s l/s l/s 16/01/2026 Edwin Lennon Killyconnigan 2.2.2 266065 332896 666003 832901 0.46 1016 0.47 3.4 0.85 0.95 1.4 1.65 1.95 2.15 IH124 2.9 3.3 4.8 5.7 6.7 7.4 RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Appendix 4 Site Rainfall Intensity Figures for Sliding Durations for Various Return Periods for the site location (Source: Met Eireann January 2026) RECEIVED: 02/04/2026 Met Eireann Return Period Rainfall Depths for sliding Durations Irish Grid: Easting: 266049, Northing: 332881, Interval | YearsDURATION 6months, 1year, | 2, 3, 4, 5, 10, 20, 30, 50, 75, 100, 150, 200, 250, 500, 5 mins 2.6, 3.7, | 4.3, 5.1, 5.7, 6.1, 7.6, 9.3, 10.4, 11.9, 13.3, 14.4, 16.0, 17.3, 18.4, N/A , 10 mins 3.6, 5.1, | 5.9, 7.1, 7.9, 8.6, 10.6, 12.9, 14.5, 16.6, 18.5, 20.0, 22.3, 24.1, 25.6, N/A , 15 mins 4.3, 6.0, | 7.0, 8.4, 9.3, 10.1, 12.5, 15.2, 17.0, 19.6, 21.8, 23.6, 26.3, 28.4, 30.1, N/A , 30 mins 5.7, 7.9, | 9.0, 10.8, 12.0, 12.9, 15.8, 19.1, 21.3, 24.4, 27.1, 29.1, 32.3, 34.8, 36.9, N/A , 1 hours 7.5, 10.3, | 11.7, 13.9, 15.3, 16.4, 20.1, 24.1, 26.7, 30.3, 33.6, 36.0, 39.8, 42.7, 45.1, N/A , 2 hours 9.9, 13.4, | 15.2, 17.9, 19.7, 21.0, 25.4, 30.3, 33.4, 37.8, 41.6, 44.5, 49.0, 52.5, 55.3, N/A , 3 hours 11.7, 15.6, | 17.7, 20.7, 22.7, 24.3, 29.2, 34.6, 38.1, 43.0, 47.2, 50.4, 55.4, 59.1, 62.2, N/A , 4 hours 13.1, 17.5, | 19.7, 23.0, 25.2, 26.9, 32.2, 38.1, 41.9, 47.1, 51.6, 55.1, 60.3, 64.4, 67.7, N/A , 6 hours 15.4, 20.4, | 22.9, 26.7, 29.1, 31.0, 37.0, 43.5, 47.7, 53.5, 58.5, 62.4, 68.2, 72.6, 76.2, N/A , 9 hours 18.1, 23.8, | 26.7, 30.9, 33.7, 35.8, 42.5, 49.8, 54.5, 60.8, 66.4, 70.6, 77.0, 81.8, 85.8, N/A ,12 hours 20.4, 26.6, | 29.8, 34.4, 37.4, 39.7, 46.9, 54.8, 59.8, 66.6, 72.6, 77.1, 83.9, 89.1, 93.3, N/A ,18 hours 24.0, 31.1, | 34.6, 39.8, 43.2, 45.8, 53.9, 62.6, 68.2, 75.8, 82.3, 87.3, 94.8, 100.4, 105.1, N/A ,24 hours 26.9, 34.7, | 38.6, 44.2, 47.9, 50.7, 59.5, 68.9, 74.9, 83.0, 90.0, 95.3, 103.3, 109.3, 114.3, 131.0, 2 days 34.6, 43.3, | 47.6, 53.6, 57.5, 60.5, 69.6, 79.3, 85.3, 93.4, 100.3, 105.5, 113.3, 119.1, 123.8, 139.7, 3 days 41.1, 50.5, | 55.1, 61.6, 65.7, 68.8, 78.3, 88.2, 94.4, 102.6, 109.6, 114.8, 122.6, 128.4, 133.0, 148.7, 4 days 47.0, 57.0, | 61.8, 68.6, 72.9, 76.2, 86.0, 96.2, 102.5, 110.9, 118.0, 123.3, 131.1, 136.9, 141.6, 157.1, 6 days 57.6, 68.6, | 73.9, 81.3, 85.9, 89.3, 99.8, 110.5, 117.1, 125.7, 133.0, 138.4, 146.3, 152.2, 157.0, 172.6, 8 days 67.3, 79.2, | 84.9, 92.7, 97.5, 101.2, 112.1, 123.3, 130.0, 139.0, 146.4, 151.9, 160.0, 166.0, 170.8, 186.5, 10 days 76.4, 89.1, | 95.0, 103.2, 108.4, 112.1, 123.5, 135.0, 142.0, 151.2, 158.8, 164.4, 172.6, 178.7, 183.5, 199.4, 12 days 85.1, 98.4, | 104.7, 113.2, 118.6, 122.5, 134.2, 146.1, 153.2, 162.6, 170.4, 176.1, 184.4, 190.5, 195.4, 211.4, 16 days 101.7, 116.2, | 122.9, 132.0, 137.7, 141.8, 154.2, 166.6, 174.1, 183.8, 191.8, 197.6, 206.2, 212.4, 217.4, 233.6, 20 days 117.5, 132.9, | 140.0, 149.7, 155.6, 159.9, 172.9, 185.7, 193.4, 203.4, 211.6, 217.6, 226.3, 232.7, 237.7, 254.1, 25 days 136.5, 152.9, | 160.5, 170.6, 176.8, 181.4, 194.9, 208.2, 216.1, 226.3, 234.7, 240.9, 249.7, 256.2, 261.3, 277.9,NOTES:N/A Data not availableThese values are derived from a Depth Duration Frequency (DDF) ModelFor details refer to:’Fitzgerald D. L. (2007), Estimates of Point Rainfall Frequencies, Technical Note No. 61, Met Eireann, Dublin’, Available for download at www.met.ie/climate/dataproducts/Estimation-of-Point-Rainfall-Frequencies_TN61.pdfRECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Appendix 5 Technical Details for Proposed Stormtech Underground Attenuation Chambers RECEIVED: 02/04/2026 STORMTECH SC-740 CHAMBER (not to scale) Nominal Chamber Specifications Size (L x W x H) 85.4” x 51” x 30” 2,170 mm x 1,295 mm x 762 mm Chamber Storage 45.9 ft3 (1.30 m 3) Min. Installed Storage* 74.9 ft 3 (2.12 m3) Weight 74.0 lbs (33.6 kg) Shipping 30 chambers/pallet 60 end caps/pallet 12 pallets/truck *Assumes 6” (150 mm) stone above, below and between chambers and 40% stone porosity. 18" (450 mm) MIN* 8' (2.4 m) MAX 51" (1295 mm) 6" (150 mm) MIN 6" (150 mm) MIN 12" (300 mm) TYP 30" (760 mm) DEPTH OF STONE TO BE DETERMINED BY SITE DESIGN ENGINEER 6" (150 mm) MIN 12" (300 mm) MIN SITE DESIGN ENGINEER IS RESPONSIBLE FOR THE ENSURING THE REQUIRED BEARING CAPACITY OF SUBGRADE SOILS PAVEMENT LAYER (DESIGNED BY SITE DESIGN ENGINEER) CHAMBERS SHALL BE BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35% FINES, COMPACT IN 6" (150 mm) MAX LIFTS TO 95% PROCTOR DENSITY. SEE THE TABLE OF ACCEPTABLE FILL MATERIALS. ADS GEOSYTHETICS 601T NON-WOVEN GEOTEXTILE ALL AROUND CLEAN, CRUSHED, ANGULAR EMBEDMENT STONE CHAMBERS SHALL MEET THE REQUIREMENTS FOR ASTM F2418 POLYPROPLENE (PP) CHAMBERS OR ASTM F922 POLYETHYLENE (PE) CHAMBERS EMBEDMENT STONE SHALL BE A CLEAN, CRUSHED AND ANGULAR STONE WITH AN AASHTO M43 DESIGNATION BETWEEN #3 AND #57 PERIMETER STONE EXCAVATION WALL (CAN BE SLOPED OR VERTICAL) SC-740 END CAP *MINIMUM COVER TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR, INCREASE COVER TO 24" (600 mm). STORMTECH SC-740 CHAMBER Designed to meet the most stringent industry performance standards for superior structural integrity while providing designers with a cost-effective method to save valuable land and protect water resources. The StormTech system is designed primarily to be used under parking lots, thus maximizing land usage for private (commercial) and public applications. StormTech chambers can also be used in conjunction with Green Infrastructure, thus enhancing the performance and extending the service life of these practices.RECEIVED: 02/04/2026 THE MOST ADVANCED NAME IN WATER MANAGEMENT SOLUTIONS TM Advanced Drainage Systems, Inc. 4640 Trueman Blvd., Hilliard, OH 43026 1-800-821-6710 www.ads-pipe.com For more information on the StormTech SC-740 Chamber and other ADS products, please contact our Customer Service Representatives at 1-800-821-6710 ADS “Terms and Conditions of Sale” are available on the ADS website, www.ads-pipe.com The ADS logo and the Green Stripe are registered trademarks of Advanced Drainage Systems, Inc. StormTech® is a registered trademark of StormTech, Inc. © 2017 Advanced Drainage Systems, Inc. # S16 090508 09/17 CS SC-740 CUMULATIVE STORAGE VOLUMES PER CHAMBER Assumes 40% Stone Porosity. Calculations are Based Upon a 6” (150 mm) Stone Base Under Chambers. Note: Add 1.13 ft 3 (0.032 m3) of storage for each additional inch (25 mm) of stone foundation. Depth of Water in System Inches (mm) Cumulative Chamber Storage ft3 (m3) Total System Cumulative Storage ft3 (m3) 42 (1067)45.90 (1.300)74.90 (2.121) 41 (1041)45.90 (1.300)73.77 (2.089) 40 (1016)45.90 (1.300)72.64 (2.057) 39 (991)45.90 (1.300)71.52 (2.025) 38 (965)45.90 (1.300)70.39 (1.993) 37 (940)45.90 (1.300)69.26 (1.961) 36 (914)45.90 (1.300)68.14 (1.929) 35 (889)45.85 (1.298)66.98 (1.897) 34 (864)45.69 (1.294)65.75 (1.862) 33 (838)45.41 (1.286)64.46 (1.825) 32 (813)44.81 (1.269)62.97 (1.783) 31 (787)44.01 (1.246)61.36 (1.737) 30 (762)43.06 (1.219)59.66 (1.689) 29 (737)41.98 (1.189)57.89 (1.639) 28 (711)40.80 (1.155) 56.05 (1.587) 27 (686)39.54 (1.120)54.17 (1.534) 26 (660)38.18 (1.081)52.23 (1.479) 25 (635)36.74 (1.040)50.23 (1.422) 24 (610)35.22 (0.977)48.19 (1.365) 23 (584)33.64 (0.953)46.11 (1.306) 22 (559)31.99 (0.906)44.00 (1.246) 21 (533)30.29 (0.858)1.85 (1.185) 20 (508)28.54 (0.808)39.67 (1.123) 19 (483)26.74 (0.757)37.47 (1.061) 18 (457)24.89 (0.705)35.23 (0.997) 17 (432)23.00 (0.651)32.96 (0.939) 16 (406)21.06 (0.596)30.68 (0.869) 15 (381)19.09 (0.541)28.36 (0.803) 14 (356)17.08 (0.484)26.03 (0.737) 13 (330)15.04 (0.426)23.68 (0.670) 12 (305)12.97 (0.367)21.31 (0.608) 11 (279)10.87 (0.309)18.92 (0.535) 10 (254)8.74 (0.247)16.51 (0.468) 9 (229)6.58 (0.186)14.09 (0.399) 8 (203)4.41 (0.125)11.66 (0.330) 7 (178)2.21 (0.063)9.21 (0.264) 6 (152)0 (0)6.76 (0.191) 5 (127)0 (0)5.63 (0.160) 4 (102)0 (0)4.51 (0.128) 3 (76)0 (0)3.38 (0.096) 2 (51)0 (0)2.25 (0.064) 1 (25)0 (0)1.13 (0.032) Stone Foundation Stone Cover ENGLISH TONS (yds3)Stone Foundation Depth 6”12”16” SC-740 3.8 (2.8)4.6 (3.3)5.5 (3.9) METRIC KILOGRAMS (m3)150 mm 300 mm 450 mm SC-740 3,450 (2.1)4,170 (2.5)4,490 (3.0) Note: Assumes 6” (150 mm) of stone above and between chambers. AMOUNT OF STONE PER CHAMBER Stone Foundation Depth 6 (150)12 (300)18 (450) SC-740 5.5 (4.2)6.2 (4.7)6.8 (5.2) Note: Assumes 6” (150 mm) of row separation and 18” (450 mm) of cover. The volume of excavation will vary as depth of cover increases. VOLUME EXCAVATION PER CHAMBER YD3 (M3) TOOLDESIGN Working on a project? Visit us at www.stormtech.com and utilize the StormTech Design Tool Bare Chamber Storage ft3 (m3) Chamber and Stone Foundation Depth in. (mm) 6 (150)12 (300)18 (450) SC-740 Chamber 45.9 (1.3)74.9 (2.1)81.7 (2.3)88.4 (2.5) STORAGE VOLUME PER CHAMBER FT3 (M3) Note: Assumes 6” (150 mm) stone above chambers, 6” (150 mm) row spacing and 40% stone porosity.RECEIVED: 02/04/2026 SHEET OFDATE:PROJECT #:DRAWN:CHECKED:THIS DRAWING HAS BEEN PREPARED BASED ON INFORMATION PROVIDED TO ADS UNDER THE DIRECTION OF THE SITE DESIGN ENGINEER OR OTHER PROJECT REPRESENTATIVE. THE SITE DESIGN ENGINEER SHALL REVIEW THIS DRAWING PRIOR TO CONSTRUCTION. IT IS THE ULTIMATERESPONSIBILITY OF THE SITE DESIGN ENGINEER TO ENSURE THAT THE PRODUCT(S) DEPICTED AND ALL ASSOCIATED DETAILS MEET ALL APPLICABLE LAWS, REGULATIONS, AND PROJECT REQUIREMENTS.4640 TRUEMAN BLVDHILLIARD, OH 43026ADVANCED DRAINAGE SYSTEMS, INC.R1 105-10-19KRKRSTANDARD CROSS SECTIONSC-740DATEDRWNCHKDDESCRIPTION70 INWOOD ROAD, SUITE 3 | ROCKY HILL | CT | 06067860-529-8188 |888-892-2694 | WWW.STORMTECH.COMDetention Retention Water QualityACCEPTABLE FILL MATERIALS: STORMTECH SC-740 CHAMBER SYSTEMS PLEASE NOTE: 1.THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN, CRUSHED, ANGULAR. FOR EXAMPLE, A SPECIFICATION FOR #4 STONE WOULD STATE: "CLEAN, CRUSHED, ANGULAR NO. 4 (AASHTO M43) STONE". 2.STORMTECH COMPACTION REQUIREMENTS ARE MET FOR 'A' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 6" (150 mm) (MAX) LIFTS USING TWO FULL COVERAGES WITH A VIBRATORY COMPACTOR. 3.WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION, FOR STANDARD DESIGN LOAD CONDITIONS, A FLAT SURFACE MAY BE ACHIEVED BY RAKING OR DRAGGING WITHOUT COMPACTION EQUIPMENT. FOR SPECIAL LOAD DESIGNS, CONTACT STORMTECH FOR COMPACTION REQUIREMENTS. 4.ONCE LAYER 'C' IS PLACED, ANY SOIL/MATERIAL CAN BE PLACED IN LAYER 'D' UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASE SOILS CAN BE USED TO REPLACE THE MATERIAL REQUIREMENTS OF LAYER 'C' OR 'D' AT THE SITE DESIGN ENGINEER'S DISCRETION. NOTES: 1.CHAMBERS SHALL MEET THE REQUIREMENTS OF ASTM F2418-16a, "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP) CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". 2.SC-740 CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTM F2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OF THERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTION CHAMBERS". 3.THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THE SUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE WITH CONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURE CONDITIONS. 4.PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THE EXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATION WALLS. 5.REQUIREMENTS FOR HANDLING AND INSTALLATION: ·TO MAINTAIN THE WIDTH OF CHAMBERS DURING SHIPPING AND HANDLING, CHAMBERS SHALL HAVE INTEGRAL, INTERLOCKING STACKING LUGS. ·TO ENSURE A SECURE JOINT DURING INSTALLATION AND BACKFILL, THE HEIGHT OF THE CHAMBER JOINT SHALL NOT BE LESS THAN 2”. ·TO ENSURE THE INTEGRITY OF THE ARCH SHAPE DURING INSTALLATION, a) THE ARCH STIFFNESS CONSTANT AS DEFINED IN SECTION 6.2.8 OF ASTM F2418 SHALL BE GREATER THAN OR EQUAL TO 550 LBS/IN/IN. AND b) TO RESIST CHAMBER DEFORMATION DURING INSTALLATION AT ELEVATED TEMPERATURES (ABOVE 73° F / 23° C), CHAMBERS SHALL BE PRODUCED FROM REFLECTIVE GOLD OR YELLOW COLORS. MATERIAL LOCATION DESCRIPTION AASHTO MATERIAL CLASSIFICATIONS COMPACTION / DENSITY REQUIREMENT D FINAL FILL: FILL MATERIAL FOR LAYER 'D' STARTS FROM THE TOP OF THE 'C' LAYER TO THE BOTTOM OF FLEXIBLE PAVEMENT OR UNPAVED FINISHED GRADE ABOVE. NOTE THAT PAVEMENT SUBBASE MAY BE PART OF THE 'D' LAYER. ANY SOIL/ROCK MATERIALS, NATIVE SOILS, OR PER ENGINEER'S PLANS. CHECK PLANS FOR PAVEMENT SUBGRADE REQUIREMENTS.N/A PREPARE PER SITE DESIGN ENGINEER'S PLANS. PAVED INSTALLATIONS MAY HAVE STRINGENT MATERIAL AND PREPARATION REQUIREMENTS. C INITIAL FILL: FILL MATERIAL FOR LAYER 'C' STARTS FROM THE TOP OF THE EMBEDMENT STONE ('B' LAYER) TO 18" (450 mm) ABOVE THE TOP OF THE CHAMBER. NOTE THAT PAVEMENT SUBBASE MAY BE A PART OF THE 'C' LAYER. GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35% FINES OR PROCESSED AGGREGATE. MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEU OF THIS LAYER. AASHTO M145¹ A-1, A-2-4, A-3 OR AASHTO M43¹ 3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 BEGIN COMPACTIONS AFTER 12" (300 mm) OF MATERIAL OVER THE CHAMBERS IS REACHED. COMPACT ADDITIONAL LAYERS IN 6" (150 mm) MAX LIFTS TO A MIN. 95% PROCTOR DENSITY FOR WELL GRADED MATERIAL AND 95% RELATIVE DENSITY FOR PROCESSED AGGREGATE MATERIALS. ROLLER GROSS VEHICLE WEIGHT NOT TO EXCEED 12,000 lbs (53 kN). DYNAMIC FORCE NOT TO EXCEED 20,000 lbs (89 kN). B EMBEDMENT STONE: FILL SURROUNDING THE CHAMBERS FROM THE FOUNDATION STONE ('A' LAYER) TO THE 'C' LAYER ABOVE. CLEAN, CRUSHED, ANGULAR STONE AASHTO M43¹ 3, 357, 4, 467, 5, 56, 57 NO COMPACTION REQUIRED. A FOUNDATION STONE: FILL BELOW CHAMBERS FROM THE SUBGRADE UP TO THE FOOT (BOTTOM) OF THE CHAMBER.CLEAN, CRUSHED, ANGULAR STONE AASHTO M43¹ 3, 357, 4, 467, 5, 56, 57 PLATE COMPACT OR ROLL TO ACHIEVE A FLAT SURFACE.2,3 18" (450 mm) MIN* 8' (2.4 m) MAX 6" (150 mm) MIN D C B A 12" (300 mm) MIN ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE ALL AROUND CLEAN, CRUSHED, ANGULAR STONE IN A & B LAYERS 12" (300 mm) MIN51" (1295 mm)6" (150 mm) MIN 30" (762 mm) DEPTH OF STONE TO BE DETERMINED BY SITE DESIGN ENGINEER 6" (150 mm) MIN *TO BOTTOM OF FLEXIBLE PAVEMENT. FOR UNPAVED INSTALLATIONS WHERE RUTTING FROM VEHICLES MAY OCCUR, INCREASE COVER TO 24" (600 mm). EXCAVATION WALL (CAN BE SLOPED OR VERTICAL) PERIMETER STONE (SEE NOTE 4) SC-740 END CAP SUBGRADE SOILS (SEE NOTE 3) PAVEMENT LAYER (DESIGNED BY SITE DESIGN ENGINEER)RECEIVED: 02/04/2026 RECEIVED: 02/04/2026 SHEET OFDATE:PROJECT #:DRAWN:CHECKED:THIS DRAWING HAS BEEN PREPARED BASED ON INFORMATION PROVIDED TO ADS UNDER THE DIRECTION OF THE SITE DESIGN ENGINEER OR OTHER PROJECT REPRESENTATIVE. THE SITE DESIGN ENGINEER SHALL REVIEW THIS DRAWING PRIOR TO CONSTRUCTION. IT IS THE ULTIMATERESPONSIBILITY OF THE SITE DESIGN ENGINEER TO ENSURE THAT THE PRODUCT(S) DEPICTED AND ALL ASSOCIATED DETAILS MEET ALL APPLICABLE LAWS, REGULATIONS, AND PROJECT REQUIREMENTS.4640 TRUEMAN BLVDHILLIARD, OH 43026ADVANCED DRAINAGE SYSTEMS, INC.R1 108/26/20----ALIALIISOLATOR ROW PLUS DETAILSSC-740DATEDRWNCHKDDESCRIPTIONNOTE: INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION CREST. STORMTECH CHAMBER CONCRETE COLLAR PAVEMENT 12" (300 mm) MIN WIDTH CONCRETE SLAB 6" (150 mm) MIN THICKNESS 4" PVC INSPECTION PORT DETAIL (SC SERIES CHAMBER) NTS 8" NYLOPLAST INSPECTION PORT BODY (PART# 2708AG4IPKIT) OR TRAFFIC RATED BOX W/SOLID LOCKING COVER CONCRETE COLLAR NOT REQUIRED FOR UNPAVED APPLICATIONS 4" (100 mm) SDR 35 PIPE 4" (100 mm) INSERTA TEE TO BE CENTERED ON CORRUGATION CREST 520 CROMWELL AVENUE | ROCKY HILL | CT | 06067860-529-8188 |888-892-2694 | WWW.STORMTECH.COMDetention Retention Water QualityINSPECTION & MAINTENANCE STEP 1)INSPECT ISOLATOR ROW PLUS FOR SEDIMENT A.INSPECTION PORTS (IF PRESENT) A.1.REMOVE/OPEN LID ON NYLOPLAST INLINE DRAIN A.2.REMOVE AND CLEAN FLEXSTORM FILTER IF INSTALLED A.3.USING A FLASHLIGHT AND STADIA ROD, MEASURE DEPTH OF SEDIMENT AND RECORD ON MAINTENANCE LOG A.4.LOWER A CAMERA INTO ISOLATOR ROW PLUS FOR VISUAL INSPECTION OF SEDIMENT LEVELS (OPTIONAL) A.5.IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. B.ALL ISOLATOR PLUS ROWS B.1.REMOVE COVER FROM STRUCTURE AT UPSTREAM END OF ISOLATOR ROW PLUS B.2.USING A FLASHLIGHT, INSPECT DOWN THE ISOLATOR ROW PLUS THROUGH OUTLET PIPE i)MIRRORS ON POLES OR CAMERAS MAY BE USED TO AVOID A CONFINED SPACE ENTRY ii)FOLLOW OSHA REGULATIONS FOR CONFINED SPACE ENTRY IF ENTERING MANHOLE B.3.IF SEDIMENT IS AT, OR ABOVE, 3" (80 mm) PROCEED TO STEP 2. IF NOT, PROCEED TO STEP 3. STEP 2)CLEAN OUT ISOLATOR ROW PLUS USING THE JETVAC PROCESS A.A FIXED CULVERT CLEANING NOZZLE WITH REAR FACING SPREAD OF 45" (1.1 m) OR MORE IS PREFERRED B.APPLY MULTIPLE PASSES OF JETVAC UNTIL BACKFLUSH WATER IS CLEAN C.VACUUM STRUCTURE SUMP AS REQUIRED STEP 3)REPLACE ALL COVERS, GRATES, FILTERS, AND LIDS; RECORD OBSERVATIONS AND ACTIONS. STEP 4)INSPECT AND CLEAN BASINS AND MANHOLES UPSTREAM OF THE STORMTECH SYSTEM. NOTES 1.INSPECT EVERY 6 MONTHS DURING THE FIRST YEAR OF OPERATION. ADJUST THE INSPECTION INTERVAL BASED ON PREVIOUS OBSERVATIONS OF SEDIMENT ACCUMULATION AND HIGH WATER ELEVATIONS. 2.CONDUCT JETTING AND VACTORING ANNUALLY OR WHEN INSPECTION SHOWS THAT MAINTENANCE IS NECESSARY. SUMP DEPTH TBD BY SITE DESIGN ENGINEER (24" [600 mm] MIN RECOMMENDED) CATCH BASIN OR MANHOLE SC-740 ISOLATOR ROW PLUS DETAIL NTS SC-740 END CAP OPTIONAL INSPECTION PORT SC-740 CHAMBER COVER ENTIRE ISOLATOR ROW PLUS WITH ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE 8' (2.4 m) MIN WIDE STORMTECH HIGHLY RECOMMENDS FLEXSTORM INSERTS IN ANY UPSTREAM STRUCTURES WITH OPEN GRATES ONE LAYER OF ADSPLUS125 WOVEN GEOTEXTILE BETWEEN FOUNDATION STONE AND CHAMBERS 5' (1.5 m) MIN WIDE CONTINUOUS FABRIC WITHOUT SEAMS ELEVATED BYPASS MANIFOLD 24" (600 mm) HDPE ACCESS PIPE REQUIRED USE FACTORY PRE-FABRICATED END CAP WITH FLAMP PART #: SC740EPE24BR RECEIVED: 02/04/2026 THE MOST ADVANCED NAME IN WATER MANAGEMENT SOLUTIONS ® Isolator ® Row PLUS O&M Manual An company SC-740 FLAMP MC-3500 RECEIVED: 02/04/2026 2 THE MOST ADVANCED NAME IN WATER MANAGEMENT SOLUTIONS ® Looking down the Isolator Row PLUS from the manhole opening, ADS PLUS Fabric is shown between the chamber and stone base. StormTech Isolator Row PLUS with Overflow Spillway (not to scale) THE ISOLATOR® ROW PLUS INTRODUCTION An important component of any Stormwater Pollution Prevention Plan is inspection and maintenance. The StormTech Isolator Row PLUS is a technique to inexpensively enhance Total Suspended Solids (TSS) and Total Phosphorus (TP) removal with easy access for inspection and maintenance. THE ISOLATOR ROW PLUS The Isolator Row PLUS is a row of StormTech chambers, either SC-160, SC-310, SC-310-3, SC-740, DC-780, MC-3500 or MC-4500 models, that is surrounded with filter fabric and connected to a closely located manhole for easy access. The fabric-wrapped chambers provide for settling and filtration of sediment as storm water rises in the Isolator Row PLUS and ultimately passes through the filter fabric. The open bottom chambers and perforated sidewalls (SC-310, SC- 310-3 and SC-740 models) allow storm water to flow both vertically and horizontally out of the chambers. Sediments are captured in the Isolator Row PLUS protecting the storage areas of the adjacent stone and chambers from sediment accumulation. ADS geotextile fabric is placed between the stone and the Isolator Row PLUS chambers. The woven geotextile provides a media for stormwater filtration, a durable surface for maintenance, prevents scour of the underlying stone and remains intact during high pressure jetting. A non- woven fabric is placed over the chambers to provide a filter media for flows passing through the perforations in the sidewall of the chamber. The non- woven fabric is not required over the SC-160, DC-780, MC-3500 or MC- 4500 models as these chambers do not have perforated side walls. The Isolator Row PLUS is designed to capture the “first flush” runoff and offers the versatility to be sized on a volume basis or a flow-rate basis. An upstream manhole not only provides access to the Isolator Row PLUS but includes a high/low concept such that stormwater flow rates or volumes that exceed the capacity of the Isolator Row PLUS bypass through a manifold to the other chambers. This is achieved with either an elevated bypass manifold or a high-flow weir. This creates a differential between the Isolator Row PLUS row of chambers and the manifold to the rest of the system, thus allowing for settlement time in the Isolator Row PLUS. After Stormwater flows through the Isolator Row PLUS and into the rest of the StormTech chamber system it is either exfiltrated into the soils below or passed at a controlled rate through an outlet manifold and outlet control structure. The Isolator Row FLAMPTM (patent pending) is a flared end ramp apparatus that is attached to the inlet pipe on the inside of the chamber end cap. The FLAMP provides a smooth transition from pipe invert to fabric bottom. It is configured to improve chamber function performance over time by enhancing outflow of solid debris that would otherwise collect at an end of the chamber. It also serves to improve the fluid and solid flow into the access pipe during maintenance and cleaning and to guide cleaning and inspection equipment back into the inlet pipe when complete. The Isolator Row PLUS may be part of a treatment train system. The design of the treatment train and selection of pretreatment devices by the design engineer is often driven by regulatory requirements. Whether pretreatment is used or not, the Isolator Row PLUS is recommended by StormTech as an effective means to minimize maintenance requirements and maintenance costs. Note: See the StormTech Design Manual for detailed information on designing inlets for a StormTech system, including the Isolator Row PLUS.RECEIVED: 02/04/2026 INSPECTION The frequency of inspection and maintenance varies by location. A routine inspection schedule needs to be established for each individual location based upon site specific variables. The type of land use (i.e. industrial, commercial, residential), anticipated pollutant load, percent imperviousness, climate, etc. all play a critical role in determining the actual frequency of inspection and maintenance practices. At a minimum, StormTech recommends annual inspections. Initially, the Isolator Row PLUS should be inspected every 6 months for the first year of operation. For subsequent years, the inspection should be adjusted based upon previous observation of sediment deposition. The Isolator Row PLUS incorporates a combination of standard manhole(s) and strategically located inspection ports (as needed). The inspection ports allow for easy access to the system from the surface, eliminating the need to perform a confined space entry for inspection purposes. If upon visual inspection it is found that sediment has accumulated, a stadia rod should be inserted to determine the depth of sediment. When the average depth of sediment exceeds 3 inches throughout the length of the Isolator Row PLUS, clean-out should be performed. MAINTENANCE The Isolator Row PLUS was designed to reduce the cost of periodic maintenance. By “isolating” sediments to just one row, costs are dramatically reduced by eliminating the need to clean out each row of the entire storage bed. If inspection indicates the potential need for maintenance, access is provided via a manhole(s) located on the end(s) of the row for cleanout. If entry into the manhole is required, please follow local and OSHA rules for a confined space entries. Maintenance is accomplished with the JetVac process. The JetVac process utilizes a high pressure water nozzle to propel itself down the Isolator Row PLUS while scouring and suspending sediments. As the nozzle is retrieved, the captured pollutants are flushed back into the manhole for vacuuming. Most sewer and pipe maintenance companies have vacuum/JetVac combination vehicles. Selection of an appropriate JetVac nozzle will improve maintenance efficiency. Fixed nozzles designed for culverts or large diameter pipe cleaning are preferable. Rear facing jets with an effective spread of at least 45” are best. StormTech recommends a maximum nozzle pressure of 2000 psi be utilized during cleaning. Most JetVac reels have 400 feet of hose allowing maintenance of an Isolator Row PLUS up to 50 chambers long. The JetVac process shall only be performed on StormTech Isolator Row PLUS that have ADS PLUS Fabric (as specified by StormTech) over their angular base stone. StormTech Isolator Row PLUS (not to scale) ISOLATOR ROW PLUS INSPECTION/MAINTENANCE Note: Non-woven fabric is only required over the inlet pipe connection into the end cap for SC-160LP, DC-780, MC-3500 and MC-4500 chamber models and is not required over the entire Isolator Row PLUS.RECEIVED: 02/04/2026 ISOLATOR ROW PLUS STEP BY STEP MAINTENANCE PROCEDURES STEP 1 Inspect Isolator Row PLUS for sediment. A) Inspection ports (if present) i. Remove lid from floor box frame ii. Remove cap from inspection riser iii. Using a flashlight and stadia rod,measure depth of sediment and record results on maintenance log. iv. If sediment is at or above 3 inch depth, proceed to Step 2. If not, proceed to Step 3. B) All Isolator Row PLUS i. Remove cover from manhole at upstream end of Isolator Row PLUS ii. Using a flashlight, inspect down Isolator Row PLUS through outlet pipe 1. Mirrors on poles or cameras may be used to avoid a confined space entry 2. Follow OSHA regulations for confined space entry if entering manhole iii. If sediment is at or above the lower row of sidewall holes (approximately 3 inches), proceed to Step 2. If not, proceed to Step 3. STEP 2 Clean out Isolator Row PLUS using the JetVac process. A) A fixed floor cleaning nozzle with rear facing nozzle spread of 45 inches or more is preferable B) Apply multiple passes of JetVac until backflush water is clean C) Vacuum manhole sump as required STEP 3 Replace all caps, lids and covers, record observations and actions. STEP 4 Inspect & clean catch basins and manholes upstream of the StormTech system. ADS “Terms and Conditions of Sale” are available on the ADS website, www.ads-pipe.com The ADS logo and the Green Stripe are registered trademarks of Advanced Drainage Systems, Inc. Stormtech® and the Isolator® Row are registered trademarks of StormTech, Inc. © 2020 Advanced Drainage Systems, Inc. #11081 07/20 CS An company Advanced Drainage Systems, Inc. 4640 Trueman Blvd., Hilliard, OH 43026 1-800-821-6710 www.ads-pipe.com )( SAMPLE MAINTENANCE LOG Date Stadia Rod Readings Sediment Depth (1)–(2)Observations/Actions InspectorFixed point to chamber bottom (1) Fixed point to top of sediment (2) 3/15/11 6.3 ft none New installation. Fixed point is CI frame at grade DJM 9/24/11 6.2 0.1 ft Some grit felt SM 6/20/13 5.8 0.5 ft Mucky feel, debris visible in manhole and in Isolator Row PLUS, maintenance due NV 7/7/13 6.3 ft 0 System jetted and vacuumed DJMRECEIVED: 02/04/2026 Initial Anchoring of Chambers – Embedment Stone Backfill of Chambers – Embedment Stone UNEVEN BACKFILL Initial embedment shall be spotted along the centerline of the chamber evenly anchoring the lower portion of the chamber. This is best accomplished with a stone conveyor or excavator reaching along the row. %DFNÛOOFKDPEHUVHYHQO\6WRQHFROXPQKHLJKWVKRXOGQHYHUGLIIHUE\PRUH than 12” (300 mm) between adjacent chamber rows or between chamber rows and perimeter. EVEN BACKFILL 1RHTXLSPHQWVKDOOEHRSHUDWHGRQWKHEHGDWWKLVVWDJHRIWKHLQVWDOODWLRQ ([FDYDWRUVPXVWEHORFDWHGRIIWKHEHG'XPSWUXFNVVKDOOQRWGXPSVWRQH GLUHFWO\RQWRWKHEHG'R]HUVRUORDGHUVDUHQRWDOORZHGRQWKHEHGDWWKLV time. 3HULPHWHUVWRQHPXVWEHEURXJKWXSHYHQO\ZLWKFKDPEHUURZV3HULPHWHU PXVWEHIXOO\EDFNÛOOHGZLWKVWRQHH[WHQGHGKRUL]RQWDOO\WRWKHH[FDYDWLRQ wall. 3(5,0(7(5127%$&.),//('3(5,0(7(5)8//<%$&.),//(' &DOO6WRUP7HFKDW888.892.2694IRUWHFKQLFDODQGSURGXFWLQIRUPDWLRQRUYLVLWZZZVWRUPWHFKFRP 3 12" (300 mm) MAX. Manifold, Scour Fabric and Chamber Assembly ,QVWDOOPDQLIROGVDQGOD\RXW$'63/86IDEULFDW inlet rows [min. 12.5 ft (3.8 m)] at each inlet end FDS3ODFHDFRQWLQXRXVSLHFHDORQJHQWLUHOHQJWK of Isolator®3/865RZV $OLJQWKHÛUVWFKDPEHUDQGHQGFDSRIHDFK row with inlet pipes. Contractor may choose to SRVWSRQHVWRQHSODFHPHQWDURXQGHQGFKDPEHUV and leave ends of rows open for easy inspection RIFKDPEHUVGXULQJWKHEDFNÛOOSURFHVV &RQWLQXHLQVWDOOLQJFKDPEHUVE\RYHUODSSLQJFKDPEHU HQGFRUUXJDWLRQV&KDPEHUMRLQWVDUHODEHOHGq/RZHU -RLQWt2YHUODS+HUHrDQGq%XLOGWKLVGLUHFWLRQt 8SSHU-RLQWr%HVXUHWKDWWKHFKDPEHUSODFHPHQW GRHVQRWH[FHHGWKHUHDFKRIWKHFRQVWUXFWLRQ HTXLSPHQWXVHGWRSODFHWKHVWRQH0DLQWDLQ PLQLPXPrPPVSDFLQJEHWZHHQURZV Attaching the End Caps Prefabricated End Caps Isolator Row PLUS Lift the end of the chamber a few inches off WKHJURXQG:LWKWKHFXUYHGIDFHRIWKHHQG FDSIDFLQJRXWZDUGSODFHWKHHQGFDSLQWRWKH FKDPEHUpVHQGFRUUXJDWLRQ rPPLQOHWVDUHWKHPD[LPXPVL]HWKDWFDQ ÛWLQWRD6&'&HQGFDSDQGPXVWEH SUHIDEULFDWHGZLWKDrPPSLSHVWXE6& FKDPEHUVZLWKDrPPLQOHWSLSHPXVWXVHD SUHIDEULFDWHGHQGFDSZLWKDrPPSLSHVWXE :KHQXVHGRQDQ,VRODWRU5RZ3/86WKHVHHQGFDSV ZLOOFRQWDLQDZHOGHG)/$03ÜDUHGHQGUDPSWKDW ZLOOOD\RQWRSRIWKH$'63/86IDEULFVKRZQDERYH 3ODFHDFRQWLQXRXVOD\HURI$'63/86IDEULFEHWZHHQ WKHIRXQGDWLRQVWRQHDQGWKH,VRODWRU5RZ3/86 FKDPEHUVPDNLQJVXUHWKHIDEULFOD\VÜDWDQGH[WHQGV WKHHQWLUHZLGWKRIWKHFKDPEHUIHHW'UDSHDVWULSRI $'6QRQZRYHQJHRWH[WLOHRYHUWKHURZRIFKDPEHUV QRWUHTXLUHGRYHU'&7KLVLVWKHVDPHW\SH RIQRQZRYHQJHRWH[WLOHXVHGDVDVHSDUDWLRQOD\HU DURXQGWKHDQJXODUVWRQHRIWKH6WRUP7HFKV\VWHP StormTech Construction Guide REQUIRED MATERIALS AND EQUIPMENT LIST p"DDFQUBCMFÙMMNBUFSJBMTQFS5BCMF p"%41MVTBOEOPOXPWFOHFPUFYUJMFGBCSJDT p4UPSN5FDITPMJEFOEDBQTBOEQSFDPSFEFOEDBQT p4UPSN5FDIDIBNCFST p4UPSN5FDINBOJGPMETBOEÙUUJOHT IMPORTANT NOTES: A. This installation guide provides the minimum requirements for proper installation of chambers. Non-adherence to this guide may result in damage to chambers during installation. Replacement of damaged chambers during or after backfilling is costly and very time consuming. It is recommended that all installers are familiar with this guide, and that the contractor inspects the chambers for distortion, damage and joint integrity as work progresses. B. Use of a dozer to push embedment stone between the rows of chambers may cause damage to chambers and is not an acceptable backfill method. Any chambers damaged by using the “dump and push” method are not covered under the StormTech standard warranty. C. Care should be taken in the handling of chambers and end caps. Avoid dropping, prying or excessive force on chambers during removal from pallet and initial placement. Requirements for System Installation ([FDYDWHEHGDQGSUHSDUHVXEJUDGHSHU engineer’s plans. 3ODFHQRQZRYHQJHRWH[WLOHRYHUSUHSDUHGVRLOV DQGXSH[FDYDWLRQZDOOV,QVWDOOXQGHUGUDLQVLI UHTXLUHG 3ODFHFOHDQFUXVKHGDQJXODUVWRQHIRXQGDWLRQ rPPPLQ&RPSDFWWRDFKLHYHDÜDW VXUIDFHSC-310/SC-740/DC-7801 2 An companyRECEIVED: 02/04/2026 Initial Anchoring of Chambers – Embedment Stone Backfill of Chambers – Embedment Stone UNEVEN BACKFILL Initial embedment shall be spotted along the centerline of the chamber evenly anchoring the lower portion of the chamber. This is best accomplished with a stone conveyor or excavator reaching along the row. %DFNÛOOFKDPEHUVHYHQO\6WRQHFROXPQKHLJKWVKRXOGQHYHUGLIIHUE\PRUH than 12” (300 mm) between adjacent chamber rows or between chamber rows and perimeter. EVEN BACKFILL 1RHTXLSPHQWVKDOOEHRSHUDWHGRQWKHEHGDWWKLVVWDJHRIWKHLQVWDOODWLRQ ([FDYDWRUVPXVWEHORFDWHGRIIWKHEHG'XPSWUXFNVVKDOOQRWGXPSVWRQH GLUHFWO\RQWRWKHEHG'R]HUVRUORDGHUVDUHQRWDOORZHGRQWKHEHGDWWKLV time. 3HULPHWHUVWRQHPXVWEHEURXJKWXSHYHQO\ZLWKFKDPEHUURZV3HULPHWHU PXVWEHIXOO\EDFNÛOOHGZLWKVWRQHH[WHQGHGKRUL]RQWDOO\WRWKHH[FDYDWLRQ wall. 3(5,0(7(5127%$&.),//('3(5,0(7(5)8//<%$&.),//(' &DOO6WRUP7HFKDW888.892.2694IRUWHFKQLFDODQGSURGXFWLQIRUPDWLRQRUYLVLWZZZVWRUPWHFKFRP 3 12" (300 mm) MAX. Manifold, Scour Fabric and Chamber Assembly ,QVWDOOPDQLIROGVDQGOD\RXW$'63/86IDEULFDW inlet rows [min. 12.5 ft (3.8 m)] at each inlet end FDS3ODFHDFRQWLQXRXVSLHFHDORQJHQWLUHOHQJWK of Isolator®3/865RZV $OLJQWKHÛUVWFKDPEHUDQGHQGFDSRIHDFK row with inlet pipes. Contractor may choose to SRVWSRQHVWRQHSODFHPHQWDURXQGHQGFKDPEHUV and leave ends of rows open for easy inspection RIFKDPEHUVGXULQJWKHEDFNÛOOSURFHVV &RQWLQXHLQVWDOOLQJFKDPEHUVE\RYHUODSSLQJFKDPEHU HQGFRUUXJDWLRQV&KDPEHUMRLQWVDUHODEHOHGq/RZHU -RLQWt2YHUODS+HUHrDQGq%XLOGWKLVGLUHFWLRQt 8SSHU-RLQWr%HVXUHWKDWWKHFKDPEHUSODFHPHQW GRHVQRWH[FHHGWKHUHDFKRIWKHFRQVWUXFWLRQ HTXLSPHQWXVHGWRSODFHWKHVWRQH0DLQWDLQ PLQLPXPrPPVSDFLQJEHWZHHQURZV Attaching the End Caps Prefabricated End Caps Isolator Row PLUS Lift the end of the chamber a few inches off WKHJURXQG:LWKWKHFXUYHGIDFHRIWKHHQG FDSIDFLQJRXWZDUGSODFHWKHHQGFDSLQWRWKH FKDPEHUpVHQGFRUUXJDWLRQ rPPLQOHWVDUHWKHPD[LPXPVL]HWKDWFDQ ÛWLQWRD6&'&HQGFDSDQGPXVWEH SUHIDEULFDWHGZLWKDrPPSLSHVWXE6& FKDPEHUVZLWKDrPPLQOHWSLSHPXVWXVHD SUHIDEULFDWHGHQGFDSZLWKDrPPSLSHVWXE :KHQXVHGRQDQ,VRODWRU5RZ3/86WKHVHHQGFDSV ZLOOFRQWDLQDZHOGHG)/$03ÜDUHGHQGUDPSWKDW ZLOOOD\RQWRSRIWKH$'63/86IDEULFVKRZQDERYH 3ODFHDFRQWLQXRXVOD\HURI$'63/86IDEULFEHWZHHQ WKHIRXQGDWLRQVWRQHDQGWKH,VRODWRU5RZ3/86 FKDPEHUVPDNLQJVXUHWKHIDEULFOD\VÜDWDQGH[WHQGV WKHHQWLUHZLGWKRIWKHFKDPEHUIHHW'UDSHDVWULSRI $'6QRQZRYHQJHRWH[WLOHRYHUWKHURZRIFKDPEHUV QRWUHTXLUHGRYHU'&7KLVLVWKHVDPHW\SH RIQRQZRYHQJHRWH[WLOHXVHGDVDVHSDUDWLRQOD\HU DURXQGWKHDQJXODUVWRQHRIWKH6WRUP7HFKV\VWHP StormTech Construction GuideREQUIRED MATERIALS AND EQUIPMENT LISTp"DDFQUBCMFÙMMNBUFSJBMTQFS5BCMFp"%41MVTBOEOPOXPWFOHFPUFYUJMFGBCSJDT p4UPSN5FDITPMJEFOEDBQTBOEQSFDPSFEFOEDBQTp4UPSN5FDIDIBNCFSTp4UPSN5FDINBOJGPMETBOEÙUUJOHTIMPORTANT NOTES:A. This installation guide provides the minimum requirements for proper installation of chambers. Non-adherence to this guide may result in damage to chambers during installation. Replacement of damaged chambers during or after backfilling is costly and very time consuming. It is recommended that all installers are familiar with this guide, and that the contractor inspects the chambers for distortion, damage and joint integrity as work progresses.B. Use of a dozer to push embedment stone between the rows of chambers may cause damage to chambers and is not an acceptable backfill method. Any chambers damaged by using the “dump and push” method are not covered under the StormTech standard warranty.C. Care should be taken in the handling of chambers and end caps. Avoid dropping, prying or excessive force on chambers during removal from pallet and initial placement.Requirements for System Installation([FDYDWHEHGDQGSUHSDUHVXEJUDGHSHUengineer’s plans.3ODFHQRQZRYHQJHRWH[WLOHRYHUSUHSDUHGVRLOVDQGXSH[FDYDWLRQZDOOV,QVWDOOXQGHUGUDLQVLIUHTXLUHG3ODFHFOHDQFUXVKHGDQJXODUVWRQHIRXQGDWLRQrPPPLQ&RPSDFWWRDFKLHYHDÜDWVXUIDFHSC-310/SC-740/DC-7801 2 An company RECEIVED: 02/04/2026 Initial Anchoring of Chambers – Embedment Stone Backfill of Chambers – Embedment Stone UNEVEN BACKFILL Initial embedment shall be spotted along the centerline of the chamber evenly anchoring the lower portion of the chamber. This is best accomplished with a stone conveyor or excavator reaching along the row. %DFNÛOOFKDPEHUVHYHQO\6WRQHFROXPQKHLJKWVKRXOGQHYHUGLIIHUE\PRUH than 12” (300 mm) between adjacent chamber rows or between chamber rows and perimeter. EVEN BACKFILL 1RHTXLSPHQWVKDOOEHRSHUDWHGRQWKHEHGDWWKLVVWDJHRIWKHLQVWDOODWLRQ ([FDYDWRUVPXVWEHORFDWHGRIIWKHEHG'XPSWUXFNVVKDOOQRWGXPSVWRQH GLUHFWO\RQWRWKHEHG'R]HUVRUORDGHUVDUHQRWDOORZHGRQWKHEHGDWWKLV time. 3HULPHWHUVWRQHPXVWEHEURXJKWXSHYHQO\ZLWKFKDPEHUURZV3HULPHWHU PXVWEHIXOO\EDFNÛOOHGZLWKVWRQHH[WHQGHGKRUL]RQWDOO\WRWKHH[FDYDWLRQ wall. 3(5,0(7(5127%$&.),//('3(5,0(7(5)8//<%$&.),//(' &DOO6WRUP7HFKDW888.892.2694IRUWHFKQLFDODQGSURGXFWLQIRUPDWLRQRUYLVLWZZZVWRUPWHFKFRP 3 12" (300 mm) MAX. Manifold, Scour Fabric and Chamber Assembly,QVWDOOPDQLIROGVDQGOD\RXW$'63/86IDEULFDWinlet rows [min. 12.5 ft (3.8 m)] at each inlet end FDS3ODFHDFRQWLQXRXVSLHFHDORQJHQWLUHOHQJWKof Isolator®3/865RZV$OLJQWKHÛUVWFKDPEHUDQGHQGFDSRIHDFKrow with inlet pipes. Contractor may choose toSRVWSRQHVWRQHSODFHPHQWDURXQGHQGFKDPEHUVand leave ends of rows open for easy inspectionRIFKDPEHUVGXULQJWKHEDFNÛOOSURFHVV&RQWLQXHLQVWDOOLQJFKDPEHUVE\RYHUODSSLQJFKDPEHUHQGFRUUXJDWLRQV&KDPEHUMRLQWVDUHODEHOHGq/RZHU-RLQWt2YHUODS+HUHrDQGq%XLOGWKLVGLUHFWLRQt8SSHU-RLQWr%HVXUHWKDWWKHFKDPEHUSODFHPHQWGRHVQRWH[FHHGWKHUHDFKRIWKHFRQVWUXFWLRQHTXLSPHQWXVHGWRSODFHWKHVWRQH0DLQWDLQPLQLPXPrPPVSDFLQJEHWZHHQURZVAttaching the End Caps Prefabricated End Caps Isolator Row PLUSLift the end of the chamber a few inches off WKHJURXQG:LWKWKHFXUYHGIDFHRIWKHHQGFDSIDFLQJRXWZDUGSODFHWKHHQGFDSLQWRWKHFKDPEHUpVHQGFRUUXJDWLRQrPPLQOHWVDUHWKHPD[LPXPVL]HWKDWFDQÛWLQWRD6&'&HQGFDSDQGPXVWEHSUHIDEULFDWHGZLWKDrPPSLSHVWXE6&FKDPEHUVZLWKDrPPLQOHWSLSHPXVWXVHDSUHIDEULFDWHGHQGFDSZLWKDrPPSLSHVWXE:KHQXVHGRQDQ,VRODWRU5RZ3/86WKHVHHQGFDSVZLOOFRQWDLQDZHOGHG)/$03ÜDUHGHQGUDPSWKDWZLOOOD\RQWRSRIWKH$'63/86IDEULFVKRZQDERYH3ODFHDFRQWLQXRXVOD\HURI$'63/86IDEULFEHWZHHQWKHIRXQGDWLRQVWRQHDQGWKH,VRODWRU5RZ3/86FKDPEHUVPDNLQJVXUHWKHIDEULFOD\VÜDWDQGH[WHQGVWKHHQWLUHZLGWKRIWKHFKDPEHUIHHW'UDSHDVWULSRI$'6QRQZRYHQJHRWH[WLOHRYHUWKHURZRIFKDPEHUVQRWUHTXLUHGRYHU'&7KLVLVWKHVDPHW\SHRIQRQZRYHQJHRWH[WLOHXVHGDVDVHSDUDWLRQOD\HUDURXQGWKHDQJXODUVWRQHRIWKH6WRUP7HFKV\VWHPStormTech Construction GuideREQUIRED MATERIALS AND EQUIPMENT LISTp"DDFQUBCMFÙMMNBUFSJBMTQFS5BCMFp"%41MVTBOEOPOXPWFOHFPUFYUJMFGBCSJDT p4UPSN5FDITPMJEFOEDBQTBOEQSFDPSFEFOEDBQTp4UPSN5FDIDIBNCFSTp4UPSN5FDINBOJGPMETBOEÙUUJOHTIMPORTANT NOTES:A. This installation guide provides the minimum requirements for proper installation of chambers. Non-adherence to this guide may result in damage to chambers during installation. Replacement of damaged chambers during or after backfilling is costly and very time consuming. It is recommended that all installers are familiar with this guide, and that the contractor inspects the chambers for distortion, damage and joint integrity as work progresses.B. Use of a dozer to push embedment stone between the rows of chambers may cause damage to chambers and is not an acceptable backfill method. Any chambers damaged by using the “dump and push” method are not covered under the StormTech standard warranty.C. Care should be taken in the handling of chambers and end caps. Avoid dropping, prying or excessive force on chambers during removal from pallet and initial placement.Requirements for System Installation([FDYDWHEHGDQGSUHSDUHVXEJUDGHSHUengineer’s plans.3ODFHQRQZRYHQJHRWH[WLOHRYHUSUHSDUHGVRLOVDQGXSH[FDYDWLRQZDOOV,QVWDOOXQGHUGUDLQVLIUHTXLUHG3ODFHFOHDQFUXVKHGDQJXODUVWRQHIRXQGDWLRQrPPPLQ&RPSDFWWRDFKLHYHDÜDWVXUIDFHSC-310/SC-740/DC-78012An company RECEIVED: 02/04/2026 ADS “Terms and Conditions of Sale” are available on the ADS website, www.ads-pipe.com. Advanced Drainage Systems, the ADS logo, and the green stripe are registered trademarks of Advanced Drainage Systems, Inc. StormTech® and the Isolator® Row PLUS are registered trademarks of Storm- Tech, Inc #11010 09/20 CS ©2020 Advanced Drainage Systems, Inc. NOTES: 1. 36” (900 mm) of stabilized cover materials over the chambers is required for full dump truck travel and dumping. 2. During paving operations, dump truck axle loads on 18” (450 mm) of cover may be necessary. Precautions should be taken to avoid rutting of the road base layer, to ensure that compaction requirements have been met, and that a minimum of 18” (450 mm) of cover exists over the chambers. Contact StormTech for additional guidance on allowable axle loads during paving. 3. Ground pressure for track dozers is the vehicle operating weight divided by total ground contact area for both tracks. Excavators will exert higher ground pressures based on loaded bucket weight and boom extension. 4. Mini-excavators (< 8,000lbs/3,628 kg) can be used with at least 12” (300 mm) of stone over the chambers and are limited by the maximum ground pressures in Table 2 based on a full bucket at maximum boom extension. 5. Storage of materials such as construction materials, equipment, spoils, etc. should not be located over the StormTech system. The use of equipment over the StormTech system not covered in Table 2 (ex. soil mixing equipment, cranes, etc) is limited. Please contact StormTech for more information. 6. Allowable track loads based on vehicle travel only. Excavators VKDOOQRWRSHUDWHRQFKDPEHUEHGVXQWLOWKHWRWDOEDFNçOOUHDFKHV 3 feet (900 mm) over the entire bed. Material Location Fill Depth over Chambers in. [mm] Maximum Allowable Wheel Loads Maximum Allowable Track Loads6 Maximum Allowable Roller Loads Max Axle Load for Trucks lbs [kN] Max Wheel Load for Loaders lbs [kN] Track Width in. [mm] Max Ground Pressure psf [kPa] Max Drum Weight or Dynamic Force lbs [kN] D Final Fill Material 36” [900] Compacted 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 3420 [164] 2350 [113] 1850 [89] 1510 [72] 1310 [63] 38,000 [169] C Initial Fill Material 24” [600] Compacted 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2480 [119] 1770 [85] 1430 [68] 1210 [58] 1070 [51] 20,000 [89] 24” [600] Loose/Dumped 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2245 [107] 1625 [78] 1325 [63] 1135 [54] 1010 [48] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] 18” [450]32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2010 [96] 1480 [71] 1220 [58] 1060 [51] 950 [45] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] B Embedment Stone 12” [300]16,000 [71]NOT ALLOWED 12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 1540 [74] 1190 [57] 1010 [48] 910 [43] 840 [40] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] 6” [150]8,000 [35]NOT ALLOWED 12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 1070 [51] 900 [43] 800 [38] 760 [36] 720 [34] NOT ALLOWED Material Location Placement Methods/ Restrictions Wheel Load Restrictions Track Load Restrictions Roller Load Restrictions See Table 2 for Maximum Construction Loads D Final Fill Material A variety of placement methods may be used. All construction loads must not exceed the maximum limits in Table 2. 36” (900 mm) minimum cover required for dump trucks to dump over chambers. Dozers to push parallel to rows until 36” (900mm) compaced cover is reached.4 Roller travel parallel to rows only until 36” (900 mm) compacted cover is reached. C Initial Fill Material Excavator positioned off bed recommended. Small excavator allowed over chambers. Small dozer allowed. Asphalt can be dumped into paver when compacted pavement subbase reaches 18” (450 mm) above top of chambers. Small LGP track dozers & skid loaders allowed to grade cover stone with at least 6” (150 mm) stone under tracks at all times. Equipment must push parallel to rows at all times. Use dynamic force of roller only after compacted fill depth reaches 12” (300 mm) over chambers. Roller travel parallel to chamber rows only. B Embedment Stone No equipment allowed on bare chambers. Use excavator or stone conveyor positioned off bed or on foundation stone to evenly fill around all chambers to at least the top of chambers. No wheel loads allowed. Material must be placed outside the limits of the chamber bed. No tracked equipment is allowed on chambers until a min. 6” (150 mm) cover stone is in place. No rollers allowed. A Foundation Stone No StormTech restrictions. Contractor responsible for any conditions or requirements by others relative to subgrade bearing capacity, dewatering or protection of subgrade. Table 2 - Maximum Allowable Construction Vehicle Loads5 Table 3 - Placement Methods and Descriptions &DOO6WRUP7HFKDW888.892.2694IRUWHFKQLFDODQGSURGXFWLQIRUPDWLRQRUYLVLWZZZVWRUPWHFKFRP 6 Material Location Description AASHTO M43 Designation1 Compaction/Density Requirement D Final Fill: Fill Material for layer ‘D’ starts from the top of the ‘C’ layer to the bottom of flexible pavement or unpaved finished grade above. Note that the pave- ment subbase may be part of the ‘D’ layer. Any soil/rock materials, native soils or per engineer’s plans. Check plans for pavement subgrade requirements. N/A Prepare per site design engineer’s plans. Paved installations may have stringent material and prepara- tion requirements. C Initial Fill: Fill Material for layer ‘C’ starts from the top of the embedment stone (‘B’ layer) to 18” (450 mm) above the top of the chamber. Note that pave- ment subbase may be part of the ‘C’ layer. Granular well-graded soil/ aggregate mixtures, <35% fines or processed aggregate. Most pavement subbase materials can be used in lieu of this layer. AASHTO M45 A-1, A-2-4, A-3 or AASHTO M431 3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 Begin compaction after min. 12” (300 mm) of mate- rial over the chambers is reached. Compact additional layers in 6” (150 mm) max. lifts to a min. 95% Proctor density for well-graded material and 95% relative density for processed aggregate materials. Roller gross vehicle weight not to exceed 12,000 lbs (53 kN). Dynamic force not to exceed 20,000 lbs (89 kN) B Embedment Stone: Embedment Stone surrounding chambers from the foundation stone to the ‘C’ layer above. Clean, crushed, angular stone AASHTO M431 3, 357, 4, 467, 5, 56, 57 No compaction required. A Foundation Stone: Foundation Stone below the chambers from the subgrade up to the foot (bottom) of the chamber. Clean, crushed, angular stone,AASHTO M431 3, 357, 4, 467, 5, 56, 57 Place and compact in 6” (150 mm) lifts using two full coverages with a vibratory compactor.2, 3 Table 1- Acceptable Fill Materials Figure 1- Inspection Port Detail PLEASE NOTE: 1. The listed AASHTO designations are for gradations only. The stone must also be clean, crushed, angular. For H[DPSOHDVSHFLçFDWLRQIRUVWRQHZRXOGVWDWHqFOHDQFUXVKHGDQJXODUQR$$6+720VWRQHr 2. StormTech compaction requirements are met for ‘A’ location materials when placed and compacted in 6” (150 mm) (max) lifts using two full coverages with a vibratory compactor. 3. :KHUHLQçOWUDWLRQVXUIDFHVPD\EHFRPSULVHGE\FRPSDFWLRQIRUVWDQGDUGLQVWDOODWLRQVDQGVWDQGDUGGHVLJQORDG FRQGLWLRQVDèDWVXUIDFHPD\EHDFKLHYHGE\UDNLQJRUGUDJJLQJZLWKRXWFRPSDFWLRQHTXLSPHQW)RUVSHFLDOORDG designs, contact StormTech for compaction requirements. Figure 2 - Fill Material Locations 5 Backfill - Embedment Stone & Cover Stone Final Backfill of Chambers – Fill Material StormTech Isolator Row PLUS Detail &RQWLQXHHYHQO\EDFNÛOOLQJEHWZHHQURZV DQGDURXQGSHULPHWHUXQWLOHPEHGPHQW stone reaches tops of chambers. 3HULPHWHUVWRQHPXVWH[WHQGKRUL]RQWDOO\ to the excavation wall for both straight or sloped sidewalls. Only after chambers HAVEBEENBACKÚLLEDTOTOPOF CHAMBERANDWITHAMINIMUMs MM OFCOVERSTONEONTOPOF CHAMBERSCANSMALLDOZERSBEUSED OVERTHECHAMBERSFORBACKÚLLING REMAININGCOVERSTONE ,QVWDOOQRQZRYHQJHRWH[WLOHRYHUVWRQH*HRWH[WLOHPXVWRYHUODSrPP PLQZKHUHHGJHVPHHW&RPSDFWHDFKOLIWRIEDFNÛOODVVSHFLÛHGLQWKHVLWH design engineer’s drawings. Roller travel parallel with rows. 6PDOOGR]HUVDQGVNLGORDGHUVPD\EH XVHGWRÛQLVKJUDGLQJVWRQHEDFNÛOOLQ DFFRUGDQFHZLWKJURXQGSUHVVXUHOLPLWVLQ 7DEOH7KH\PXVWSXVKPDWHULDOSDUDOOHO WRURZVRQO\1HYHUSXVKSHUSHQGLFXODU WRURZV6WRUP7HFKUHFRPPHQGVWKDW the contractor inspect chambers before SODFLQJÛQDOEDFNÛOO$Q\FKDPEHUV GDPDJHGE\FRQVWUXFWLRQVKDOOEH removed and replaced. 4 Inserta Tee Detail NOTE: INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION CREST. STORMTECH CHAMBER CONCRETE COLLAR PAVEMENT 12" (300 mm) MIN WIDTH CONCRETE SLAB 6" (150 mm) MIN THICKNESS 8" NYLOPLAST INSPECTION PORT BODY (PART# 2708AG4IPKIT) OR TRAFFIC RATED BOX W/SOLID LOCKING COVER CONCRETE COLLAR NOT REQUIRED FOR UNPAVED APPLICATIONS 4" (100 mm) SDR 35 PIPE 4" (100 mm) INSERTA TEE TO BE CENTERED ON CORRUGATION CREST SUMP DEPTH BY SITE DESIGN ENGINEER CATCH BASIN OR MANHOLE CHAMBER (SC-740 SHOWN) COVER ENTIRE ISOLATOR ROW PLUS WITH ADS GEOSYNTHETICS 601T NON-WOVEN GEOTEXTILE SC-740 - 8' (2.4 m) MIN WIDE STRIP SC-310 - 5' (1.5 m) MIN WIDE STRIP ONE LAYER OF ADSPLUS125 WOVEN GEOTEXTILE BETWEEN FOUNDATION STONE AND CHAMBERS SC-740 & DC-780 - 5' (1.5 m) MIN WIDE STRIPS SC-310 - 4' (1.2m) MIN WIDE STRIPS CONTINUOUS FABRIC WITHOUT SEAMS SC-740 & DC-780 - 24" (600 mm) HDPE ACCESS PIPE REQUIRED USE FACTORY PRE-FABRICATED END CAP WITH FLAMP PART #: SC740EPE24BR SC-310 - 12" (300mm) HDPE ACCESS PIPE USE FACTORY PRE-FABRICATED END CAP PART #: SC310EPE12B NOTE: NON-WOVEN GEOTEXTILE OVER DC-780 CHAMBERS IS NOT REQUIRED. CONVEYANCE PIPE MATERIAL MAY VARY (PVC, HDPE, ETC.) INSERTA TEE CONNECTION PLACE ADS PLUS WOVEN GEOTEXTILE (CENTERED ON INSERTA-TEE INLET) OVER BEDDING STONE FOR SCOUR PROTECTION AT SIDE INLET CONNECTIONS, GEOTEXTILE MUST EXTEND 6” (150 mm) PAST CHAMBER FOOT CHAMBER MAX DIAMETER OF INSERTA TEE HEIGHT FROM BASE OF CHAMBER (X) 4$o NN o NN 4$o NN o NN %$o NN o NN */4&35"5&&'*55*/(4"7"*-"#-&'034%3 4%3 4$)*14 ("4,&5&%40-7&/58&-% / )14503. $03%6$5*-&*30/RECEIVED: 02/04/2026 ADS “Terms and Conditions of Sale” are available on the ADS website, www.ads-pipe.com. Advanced Drainage Systems, the ADS logo, and the green stripe are registered trademarks of Advanced Drainage Systems, Inc. StormTech® and the Isolator® Row PLUS are registered trademarks of Storm- Tech, Inc #11010 09/20 CS ©2020 Advanced Drainage Systems, Inc. NOTES: 1. 36” (900 mm) of stabilized cover materials over the chambers is required for full dump truck travel and dumping. 2. During paving operations, dump truck axle loads on 18” (450 mm) of cover may be necessary. Precautions should be taken to avoid rutting of the road base layer, to ensure that compaction requirements have been met, and that a minimum of 18” (450 mm) of cover exists over the chambers. Contact StormTech for additional guidance on allowable axle loads during paving. 3. Ground pressure for track dozers is the vehicle operating weight divided by total ground contact area for both tracks. Excavators will exert higher ground pressures based on loaded bucket weight and boom extension. 4. Mini-excavators (< 8,000lbs/3,628 kg) can be used with at least 12” (300 mm) of stone over the chambers and are limited by the maximum ground pressures in Table 2 based on a full bucket at maximum boom extension. 5. Storage of materials such as construction materials, equipment, spoils, etc. should not be located over the StormTech system. The use of equipment over the StormTech system not covered in Table 2 (ex. soil mixing equipment, cranes, etc) is limited. Please contact StormTech for more information. 6. Allowable track loads based on vehicle travel only. Excavators VKDOOQRWRSHUDWHRQFKDPEHUEHGVXQWLOWKHWRWDOEDFNçOOUHDFKHV 3 feet (900 mm) over the entire bed. Material Location Fill Depth over Chambers in. [mm] Maximum Allowable Wheel Loads Maximum Allowable Track Loads6 Maximum Allowable Roller Loads Max Axle Load for Trucks lbs [kN] Max Wheel Load for Loaders lbs [kN] Track Width in. [mm] Max Ground Pressure psf [kPa] Max Drum Weight or Dynamic Force lbs [kN] D Final Fill Material 36” [900] Compacted 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 3420 [164] 2350 [113] 1850 [89] 1510 [72] 1310 [63] 38,000 [169] C Initial Fill Material 24” [600] Compacted 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2480 [119] 1770 [85] 1430 [68] 1210 [58] 1070 [51] 20,000 [89] 24” [600] Loose/Dumped 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2245 [107] 1625 [78] 1325 [63] 1135 [54] 1010 [48] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] 18” [450]32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2010 [96] 1480 [71] 1220 [58] 1060 [51] 950 [45] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] B Embedment Stone 12” [300]16,000 [71]NOT ALLOWED 12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 1540 [74] 1190 [57] 1010 [48] 910 [43] 840 [40] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] 6” [150]8,000 [35]NOT ALLOWED 12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 1070 [51] 900 [43] 800 [38] 760 [36] 720 [34] NOT ALLOWED Material Location Placement Methods/ Restrictions Wheel Load Restrictions Track Load Restrictions Roller Load Restrictions See Table 2 for Maximum Construction Loads D Final Fill Material A variety of placement methods may be used. All construction loads must not exceed the maximum limits in Table 2. 36” (900 mm) minimum cover required for dump trucks to dump over chambers. Dozers to push parallel to rows until 36” (900mm) compaced cover is reached.4 Roller travel parallel to rows only until 36” (900 mm) compacted cover is reached. C Initial Fill Material Excavator positioned off bed recommended. Small excavator allowed over chambers. Small dozer allowed. Asphalt can be dumped into paver when compacted pavement subbase reaches 18” (450 mm) above top of chambers. Small LGP track dozers & skid loaders allowed to grade cover stone with at least 6” (150 mm) stone under tracks at all times. Equipment must push parallel to rows at all times. Use dynamic force of roller only after compacted fill depth reaches 12” (300 mm) over chambers. Roller travel parallel to chamber rows only. B Embedment Stone No equipment allowed on bare chambers. Use excavator or stone conveyor positioned off bed or on foundation stone to evenly fill around all chambers to at least the top of chambers. No wheel loads allowed. Material must be placed outside the limits of the chamber bed. No tracked equipment is allowed on chambers until a min. 6” (150 mm) cover stone is in place. No rollers allowed. A Foundation Stone No StormTech restrictions. Contractor responsible for any conditions or requirements by others relative to subgrade bearing capacity, dewatering or protection of subgrade. Table 2 - Maximum Allowable Construction Vehicle Loads5 Table 3 - Placement Methods and Descriptions &DOO6WRUP7HFKDW888.892.2694IRUWHFKQLFDODQGSURGXFWLQIRUPDWLRQRUYLVLWZZZVWRUPWHFKFRP 6 Material Location Description AASHTO M43 Designation1 Compaction/Density Requirement D Final Fill: Fill Material for layer ‘D’ starts from the top of the ‘C’ layer to the bottom of flexible pavement or unpaved finished grade above. Note that the pave- ment subbase may be part of the ‘D’ layer. Any soil/rock materials, native soils or per engineer’s plans. Check plans for pavement subgrade requirements. N/A Prepare per site design engineer’s plans. Paved installations may have stringent material and prepara- tion requirements. C Initial Fill: Fill Material for layer ‘C’ starts from the top of the embedment stone (‘B’ layer) to 18” (450 mm) above the top of the chamber. Note that pave- ment subbase may be part of the ‘C’ layer. Granular well-graded soil/ aggregate mixtures, <35% fines or processed aggregate. Most pavement subbase materials can be used in lieu of this layer. AASHTO M45 A-1, A-2-4, A-3 or AASHTO M431 3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 Begin compaction after min. 12” (300 mm) of mate- rial over the chambers is reached. Compact additional layers in 6” (150 mm) max. lifts to a min. 95% Proctor density for well-graded material and 95% relative density for processed aggregate materials. Roller gross vehicle weight not to exceed 12,000 lbs (53 kN). Dynamic force not to exceed 20,000 lbs (89 kN) B Embedment Stone: Embedment Stone surrounding chambers from the foundation stone to the ‘C’ layer above. Clean, crushed, angular stone AASHTO M431 3, 357, 4, 467, 5, 56, 57 No compaction required. A Foundation Stone: Foundation Stone below the chambers from the subgrade up to the foot (bottom) of the chamber. Clean, crushed, angular stone,AASHTO M431 3, 357, 4, 467, 5, 56, 57 Place and compact in 6” (150 mm) lifts using two full coverages with a vibratory compactor.2, 3 Table 1- Acceptable Fill Materials Figure 1- Inspection Port Detail PLEASE NOTE: 1. The listed AASHTO designations are for gradations only. The stone must also be clean, crushed, angular. For H[DPSOHDVSHFLçFDWLRQIRUVWRQHZRXOGVWDWHqFOHDQFUXVKHGDQJXODUQR$$6+720VWRQHr 2. StormTech compaction requirements are met for ‘A’ location materials when placed and compacted in 6” (150 mm) (max) lifts using two full coverages with a vibratory compactor. 3. :KHUHLQçOWUDWLRQVXUIDFHVPD\EHFRPSULVHGE\FRPSDFWLRQIRUVWDQGDUGLQVWDOODWLRQVDQGVWDQGDUGGHVLJQORDG FRQGLWLRQVDèDWVXUIDFHPD\EHDFKLHYHGE\UDNLQJRUGUDJJLQJZLWKRXWFRPSDFWLRQHTXLSPHQW)RUVSHFLDOORDG designs, contact StormTech for compaction requirements. Figure 2 - Fill Material Locations 5 Backfill - Embedment Stone & Cover Stone Final Backfill of Chambers – Fill MaterialStormTech Isolator Row PLUS Detail&RQWLQXHHYHQO\EDFNÛOOLQJEHWZHHQURZVDQGDURXQGSHULPHWHUXQWLOHPEHGPHQWstone reaches tops of chambers. 3HULPHWHUVWRQHPXVWH[WHQGKRUL]RQWDOO\to the excavation wall for both straight or sloped sidewalls. Only after chambers HAVEBEENBACKÚLLEDTOTOPOFCHAMBERANDWITHAMINIMUMsMM OFCOVERSTONEONTOPOFCHAMBERSCANSMALLDOZERSBEUSEDOVERTHECHAMBERSFORBACKÚLLINGREMAININGCOVERSTONE,QVWDOOQRQZRYHQJHRWH[WLOHRYHUVWRQH*HRWH[WLOHPXVWRYHUODSrPPPLQZKHUHHGJHVPHHW&RPSDFWHDFKOLIWRIEDFNÛOODVVSHFLÛHGLQWKHVLWHdesign engineer’s drawings. Roller travel parallel with rows.6PDOOGR]HUVDQGVNLGORDGHUVPD\EHXVHGWRÛQLVKJUDGLQJVWRQHEDFNÛOOLQDFFRUGDQFHZLWKJURXQGSUHVVXUHOLPLWVLQ7DEOH7KH\PXVWSXVKPDWHULDOSDUDOOHOWRURZVRQO\1HYHUSXVKSHUSHQGLFXODUWRURZV6WRUP7HFKUHFRPPHQGVWKDWthe contractor inspect chambers before SODFLQJÛQDOEDFNÛOO$Q\FKDPEHUVGDPDJHGE\FRQVWUXFWLRQVKDOOEHremoved and replaced.4Inserta Tee Detail NOTE: INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION CREST. STORMTECH CHAMBER CONCRETE COLLAR PAVEMENT 12" (300 mm) MIN WIDTH CONCRETE SLAB 6" (150 mm) MIN THICKNESS 8" NYLOPLAST INSPECTION PORT BODY (PART# 2708AG4IPKIT) OR TRAFFIC RATED BOX W/SOLID LOCKING COVER CONCRETE COLLAR NOT REQUIRED FOR UNPAVED APPLICATIONS 4" (100 mm) SDR 35 PIPE 4" (100 mm) INSERTA TEE TO BE CENTERED ON CORRUGATION CREST SUMP DEPTH BYSITE DESIGNENGINEERCATCH BASINOR MANHOLE CHAMBER (SC-740 SHOWN)COVER ENTIRE ISOLATOR ROW PLUS WITH ADSGEOSYNTHETICS 601T NON-WOVEN GEOTEXTILESC-740 - 8' (2.4 m) MIN WIDE STRIPSC-310 - 5' (1.5 m) MIN WIDE STRIP ONE LAYER OF ADSPLUS125 WOVENGEOTEXTILE BETWEEN FOUNDATION STONEAND CHAMBERSSC-740 & DC-780 - 5' (1.5 m) MIN WIDE STRIPSSC-310 - 4' (1.2m) MIN WIDE STRIPSCONTINUOUS FABRIC WITHOUT SEAMSSC-740 & DC-780 - 24" (600 mm) HDPE ACCESSPIPE REQUIRED USE FACTORYPRE-FABRICATED END CAP WITH FLAMPPART #: SC740EPE24BRSC-310 - 12" (300mm) HDPE ACCESS PIPEUSE FACTORY PRE-FABRICATED END CAPPART #: SC310EPE12BNOTE: NON-WOVEN GEOTEXTILE OVERDC-780 CHAMBERS IS NOT REQUIRED.CONVEYANCE PIPE MATERIAL MAY VARY (PVC, HDPE, ETC.)INSERTA TEE CONNECTIONPLACE ADS PLUS WOVEN GEOTEXTILE (CENTERED ON INSERTA-TEE INLET) OVER BEDDING STONE FOR SCOUR PROTECTION AT SIDE INLET CONNECTIONS, GEOTEXTILE MUST EXTEND 6” (150 mm) PAST CHAMBER FOOT CHAMBER MAX DIAMETER OF INSERTA TEE HEIGHT FROM BASE OF CHAMBER (X)4$o NN o NN 4$o NN o NN %$o NN o NN */4&35"5&&'*55*/(4"7"*-"#-&'034%3 4%3 4$)*14("4,&5&%40-7&/58&-% / )14503. $03%6$5*-&*30/RECEIVED: 02/04/2026 ADS “Terms and Conditions of Sale” are available on the ADS website, www.ads-pipe.com. Advanced Drainage Systems, the ADS logo, and the green stripe are registered trademarks of Advanced Drainage Systems, Inc. StormTech® and the Isolator® Row PLUS are registered trademarks of Storm- Tech, Inc #11010 09/20 CS ©2020 Advanced Drainage Systems, Inc. NOTES: 1. 36” (900 mm) of stabilized cover materials over the chambers is required for full dump truck travel and dumping. 2. During paving operations, dump truck axle loads on 18” (450 mm) of cover may be necessary. Precautions should be taken to avoid rutting of the road base layer, to ensure that compaction requirements have been met, and that a minimum of 18” (450 mm) of cover exists over the chambers. Contact StormTech for additional guidance on allowable axle loads during paving. 3. Ground pressure for track dozers is the vehicle operating weight divided by total ground contact area for both tracks. Excavators will exert higher ground pressures based on loaded bucket weight and boom extension. 4. Mini-excavators (< 8,000lbs/3,628 kg) can be used with at least 12” (300 mm) of stone over the chambers and are limited by the maximum ground pressures in Table 2 based on a full bucket at maximum boom extension. 5. Storage of materials such as construction materials, equipment, spoils, etc. should not be located over the StormTech system. The use of equipment over the StormTech system not covered in Table 2 (ex. soil mixing equipment, cranes, etc) is limited. Please contact StormTech for more information. 6. Allowable track loads based on vehicle travel only. Excavators VKDOOQRWRSHUDWHRQFKDPEHUEHGVXQWLOWKHWRWDOEDFNçOOUHDFKHV 3 feet (900 mm) over the entire bed. Material Location Fill Depth over Chambers in. [mm] Maximum Allowable Wheel Loads Maximum Allowable Track Loads6 Maximum Allowable Roller Loads Max Axle Load for Trucks lbs [kN] Max Wheel Load for Loaders lbs [kN] Track Width in. [mm] Max Ground Pressure psf [kPa] Max Drum Weight or Dynamic Force lbs [kN] D Final Fill Material 36” [900] Compacted 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 3420 [164] 2350 [113] 1850 [89] 1510 [72] 1310 [63] 38,000 [169] C Initial Fill Material 24” [600] Compacted 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2480 [119] 1770 [85] 1430 [68] 1210 [58] 1070 [51] 20,000 [89] 24” [600] Loose/Dumped 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2245 [107] 1625 [78] 1325 [63] 1135 [54] 1010 [48] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] 18” [450]32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2010 [96] 1480 [71] 1220 [58] 1060 [51] 950 [45] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] B Embedment Stone 12” [300]16,000 [71]NOT ALLOWED 12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 1540 [74] 1190 [57] 1010 [48] 910 [43] 840 [40] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] 6” [150]8,000 [35]NOT ALLOWED 12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 1070 [51] 900 [43] 800 [38] 760 [36] 720 [34] NOT ALLOWED Material Location Placement Methods/ Restrictions Wheel Load Restrictions Track Load Restrictions Roller Load Restrictions See Table 2 for Maximum Construction Loads D Final Fill Material A variety of placement methods may be used. All construction loads must not exceed the maximum limits in Table 2. 36” (900 mm) minimum cover required for dump trucks to dump over chambers. Dozers to push parallel to rows until 36” (900mm) compaced cover is reached.4 Roller travel parallel to rows only until 36” (900 mm) compacted cover is reached. C Initial Fill Material Excavator positioned off bed recommended. Small excavator allowed over chambers. Small dozer allowed. Asphalt can be dumped into paver when compacted pavement subbase reaches 18” (450 mm) above top of chambers. Small LGP track dozers & skid loaders allowed to grade cover stone with at least 6” (150 mm) stone under tracks at all times. Equipment must push parallel to rows at all times. Use dynamic force of roller only after compacted fill depth reaches 12” (300 mm) over chambers. Roller travel parallel to chamber rows only. B Embedment Stone No equipment allowed on bare chambers. Use excavator or stone conveyor positioned off bed or on foundation stone to evenly fill around all chambers to at least the top of chambers. No wheel loads allowed. Material must be placed outside the limits of the chamber bed. No tracked equipment is allowed on chambers until a min. 6” (150 mm) cover stone is in place. No rollers allowed. A Foundation Stone No StormTech restrictions. Contractor responsible for any conditions or requirements by others relative to subgrade bearing capacity, dewatering or protection of subgrade. Table 2 - Maximum Allowable Construction Vehicle Loads5 Table 3 - Placement Methods and Descriptions &DOO6WRUP7HFKDW888.892.2694IRUWHFKQLFDODQGSURGXFWLQIRUPDWLRQRUYLVLWZZZVWRUPWHFKFRP 6 Material Location Description AASHTO M43 Designation1 Compaction/Density RequirementD Final Fill: Fill Material for layer ‘D’ starts from the top of the ‘C’ layer to the bottom of flexible pavement or unpaved finished grade above. Note that the pave-ment subbase may be part of the ‘D’ layer.Any soil/rock materials, native soils or per engineer’s plans. Check plans for pavement subgrade requirements.N/A Prepare per site design engineer’s plans. Paved installations may have stringent material and prepara-tion requirements.C Initial Fill: Fill Material for layer ‘C’ starts from the top of the embedment stone (‘B’ layer) to 18” (450 mm) above the top of the chamber. Note that pave-ment subbase may be part of the ‘C’ layer.Granular well-graded soil/aggregate mixtures, <35% fines or processed aggregate. Most pavement subbase materials can be used in lieu of this layer.AASHTO M45A-1, A-2-4, A-3orAASHTO M431 3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 Begin compaction after min. 12” (300 mm) of mate-rial over the chambers is reached. Compact additional layers in 6” (150 mm) max. lifts to a min. 95% Proctor density for well-graded material and 95% relative density for processed aggregate materials. Roller gross vehicle weight not to exceed 12,000 lbs (53 kN). Dynamic force not to exceed 20,000 lbs (89 kN)B Embedment Stone: Embedment Stone surrounding chambers from the foundation stone to the ‘C’ layer above.Clean, crushed, angular stone AASHTO M4313, 357, 4, 467, 5, 56, 57 No compaction required.A Foundation Stone: Foundation Stone below the chambers from the subgrade up to the foot (bottom) of the chamber.Clean, crushed, angular stone,AASHTO M4313, 357, 4, 467, 5, 56, 57 Place and compact in 6” (150 mm) lifts using two fullcoverages with a vibratory compactor.2, 3Table 1- Acceptable Fill Materials Figure 1- Inspection Port DetailPLEASE NOTE:1. The listed AASHTO designations are for gradations only. The stone must also be clean, crushed, angular. For H[DPSOHDVSHFLçFDWLRQIRUVWRQHZRXOGVWDWHqFOHDQFUXVKHGDQJXODUQR$$6+720VWRQHr2. StormTech compaction requirements are met for ‘A’ location materials when placed and compacted in 6” (150 mm) (max) lifts using two full coverages with a vibratory compactor.3. :KHUHLQçOWUDWLRQVXUIDFHVPD\EHFRPSULVHGE\FRPSDFWLRQIRUVWDQGDUGLQVWDOODWLRQVDQGVWDQGDUGGHVLJQORDGFRQGLWLRQVDèDWVXUIDFHPD\EHDFKLHYHGE\UDNLQJRUGUDJJLQJZLWKRXWFRPSDFWLRQHTXLSPHQW)RUVSHFLDOORDGdesigns, contact StormTech for compaction requirements.Figure 2 - Fill Material Locations 5Backfill - Embedment Stone & Cover Stone Final Backfill of Chambers – Fill MaterialStormTech Isolator Row PLUS Detail&RQWLQXHHYHQO\EDFNÛOOLQJEHWZHHQURZVDQGDURXQGSHULPHWHUXQWLOHPEHGPHQWstone reaches tops of chambers. 3HULPHWHUVWRQHPXVWH[WHQGKRUL]RQWDOO\to the excavation wall for both straight or sloped sidewalls. Only after chambers HAVEBEENBACKÚLLEDTOTOPOFCHAMBERANDWITHAMINIMUMsMM OFCOVERSTONEONTOPOFCHAMBERSCANSMALLDOZERSBEUSEDOVERTHECHAMBERSFORBACKÚLLINGREMAININGCOVERSTONE,QVWDOOQRQZRYHQJHRWH[WLOHRYHUVWRQH*HRWH[WLOHPXVWRYHUODSrPPPLQZKHUHHGJHVPHHW&RPSDFWHDFKOLIWRIEDFNÛOODVVSHFLÛHGLQWKHVLWHdesign engineer’s drawings. Roller travel parallel with rows.6PDOOGR]HUVDQGVNLGORDGHUVPD\EHXVHGWRÛQLVKJUDGLQJVWRQHEDFNÛOOLQDFFRUGDQFHZLWKJURXQGSUHVVXUHOLPLWVLQ7DEOH7KH\PXVWSXVKPDWHULDOSDUDOOHOWRURZVRQO\1HYHUSXVKSHUSHQGLFXODUWRURZV6WRUP7HFKUHFRPPHQGVWKDWthe contractor inspect chambers before SODFLQJÛQDOEDFNÛOO$Q\FKDPEHUVGDPDJHGE\FRQVWUXFWLRQVKDOOEHremoved and replaced.4Inserta Tee Detail NOTE:INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION CREST.STORMTECH CHAMBERCONCRETE COLLARPAVEMENT 12" (300 mm) MIN WIDTHCONCRETE SLAB6" (150 mm) MIN THICKNESS 8" NYLOPLAST INSPECTION PORTBODY (PART# 2708AG4IPKIT) ORTRAFFIC RATED BOX W/SOLIDLOCKING COVERCONCRETE COLLAR NOT REQUIREDFOR UNPAVED APPLICATIONS4" (100 mm)SDR 35 PIPE4" (100 mm) INSERTA TEETO BE CENTERED ONCORRUGATION CRESTSUMP DEPTH BYSITE DESIGNENGINEERCATCH BASINOR MANHOLE CHAMBER (SC-740 SHOWN)COVER ENTIRE ISOLATOR ROW PLUS WITH ADSGEOSYNTHETICS 601T NON-WOVEN GEOTEXTILESC-740 - 8' (2.4 m) MIN WIDE STRIPSC-310 - 5' (1.5 m) MIN WIDE STRIP ONE LAYER OF ADSPLUS125 WOVENGEOTEXTILE BETWEEN FOUNDATION STONEAND CHAMBERSSC-740 & DC-780 - 5' (1.5 m) MIN WIDE STRIPSSC-310 - 4' (1.2m) MIN WIDE STRIPSCONTINUOUS FABRIC WITHOUT SEAMSSC-740 & DC-780 - 24" (600 mm) HDPE ACCESSPIPE REQUIRED USE FACTORYPRE-FABRICATED END CAP WITH FLAMPPART #: SC740EPE24BRSC-310 - 12" (300mm) HDPE ACCESS PIPEUSE FACTORY PRE-FABRICATED END CAPPART #: SC310EPE12BNOTE: NON-WOVEN GEOTEXTILE OVERDC-780 CHAMBERS IS NOT REQUIRED.CONVEYANCE PIPE MATERIAL MAY VARY (PVC, HDPE, ETC.)INSERTA TEE CONNECTIONPLACE ADS PLUS WOVEN GEOTEXTILE (CENTERED ON INSERTA-TEE INLET) OVER BEDDING STONE FOR SCOUR PROTECTION AT SIDE INLET CONNECTIONS, GEOTEXTILE MUST EXTEND 6” (150 mm) PAST CHAMBER FOOT CHAMBER MAX DIAMETER OF INSERTA TEE HEIGHT FROM BASE OF CHAMBER (X)4$o NN o NN 4$o NN o NN %$o NN o NN */4&35"5&&'*55*/(4"7"*-"#-&'034%3 4%3 4$)*14("4,&5&%40-7&/58&-% / )14503. $03%6$5*-&*30/RECEIVED: 02/04/2026 20 Beaver Road, Suite 104 Wethersfield Connecticut 06109 888.892.2694 fax 866.328.8401 www.stormtech.com 17.0 Standard Limited Warranty STANDARD LIMITED WARRANTY OF STORMTECH LLC (“STORMTECH”): PRODUCTS (A) This Limited Warranty applies solely to the StormTech chambers and end plates manufactured by StormTech and sold to the original purchaser (the “Purchaser”). The chambers and end plates are collectively referred to as the “Products.” (B) The structural integrity of the Products, when installed strictly in accordance with StormTech’s written installation instructions at the time of installation, are warranted to the Purchaser against defective materials and workmanship for one (1) year from the date of purchase. Should a defect appear in the Limited Warranty period, the Purchaser shall provide StormTech with written notice of the alleged defect at StormTech’s corporate headquarters within ten (10) days of the discovery of the defect. The notice shall describe the alleged defect in reasonable detail. StormTech agrees to supply replacements for those Products determined by StormTech to be defective and covered by this Limited Warranty. The supply of replacement products is the sole remedy of the Purchaser for breaches of this Limited Warranty. StormTech’s liability specifically excludes the cost of removal and/or installation of the Products. (C) THIS LIMITED WARRANTY IS EXCLUSIVE. THERE ARE NO OTHER WARRANTIES WITH RESPECT TO THE PRODUCTS, INCLUDING NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE. (D) This Limited Warranty only applies to the Products when the Products are installed in a single layer. UNDER NO CIRCUMSTANCES, SHALL THE PRODUCTS BE INSTALLED IN A MULTI-LAYER CONFIGURATION. (E) No representative of StormTech has the authority to change this Limited Warranty in any manner or to extend this Limited Warranty. This Limited Warranty does not apply to any person other than to the Purchaser. (F) Under no circumstances shall StormTech be liable to the Purchaser or to any third party for product liability claims; claims arising from the design, shipment, or installation of the Products, or the cost of other goods or services related to the purchase and installation of the Products. For this Limited Warranty to apply, the Products must be installed in accordance with all site conditions required by state and local codes; all other applicable laws; and StormTech’s written installation instructions. (G) THE LIMITED WARRANTY DOES NOT EXTEND TO INCIDENTAL, CONSEQUENTIAL, SPECIAL OR INDIRECT DAMAGES. STORMTECH SHALL NOT BE LIABLE FOR PENALTIES OR LIQUIDATED DAMAGES, INCLUDING LOSS OF PRODUCTION AND PROFITS; LABOR AND MATERIALS; OVERHEAD COSTS; OR OTHER LOSS OR EXPENSE INCURRED BY THE PURCHASER OR ANY THIRD PARTY. SPECIFICALLY EXCLUDED FROM LIMITED WARRANTY COVERAGE ARE DAMAGE TO THE PRODUCTS ARISING FROM ORDINARY WEAR AND TEAR; ALTERATION, ACCIDENT, MISUSE, ABUSE OR NEGLECT; THE PRODUCTS BEING SUBJECTED TO VEHICLE TRAFFIC OR OTHER CONDITIONS WHICH ARE NOT PERMITTED BY STORMTECH’S WRITTEN SPECIFICATIONS OR INSTALLATION INSTRUCTIONS; FAILURE TO MAINTAIN THE MINIMUM GROUND COVERS SET FORTH IN THE INSTALLATION INSTRUCTIONS; THE PLACEMENT OF IMPROPER MATERIALS INTO THE PRODUCTS; FAILURE OF THE PRODUCTS DUE TO IMPROPER SITING OR IMPROPER SIZING; OR ANY OTHER EVENT NOT CAUSED BY STORMTECH. A PRODUCT ALSO IS EXCLUDED FROM LIMITED WARRANTY COVERAGE IF SUCH PRODUCT IS USED IN A PROJECT OR SYSTEM IN WHICH ANY GEOTEXTILE PRODUCTS OTHER THAN THOSE PROVIDED BY ADVANCED DRAINAGE SYSTEMS ARE USED. THIS LIMITED WARRANTY REPRESENTS STORMTECH’S SOLE LIABILITY TO THE PURCHASER FOR CLAIMS RELATED TO THE PRODUCTS, WHETHER THE CLAIM IS BASED UPON CONTRACT, TORT, OR OTHER LEGAL THEORY. An company RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Appendix 6 Maintenance Details for Surface Water Network RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Proposed Maintenance Proposals and Schedule for Attenuation and SUDS Elements Proposed Drainage System The proposed surface water collection system will consist of a piped drainage network discharging surface water from road gullies and rainwater pipes as shown on the proposed site layout drawing prepared by Alan Clarke & Associates (drawing number 26104-500). The surface water discharge from the site will be restricted by means of hydrobrake flow restrictor and attenuation chambers will be provided to store the excess surface water during storm periods. Detailed calculations and proposals for the piped drainage system and attenuation have been provided as part of this submission. Maintenance Requirements & Proposals In order for the surface water drainage system to function correctly in the long term, it is essential that a programme of regular maintenance of the collection and attenuation elements of the system is carried out. The principal elements for which maintenance is required are the collection elements such as trapped gullies at rainwater pipes, road gully sumps and channel drains along with the attenuation chambers and associated elements. All collection elements, which are the first line of defence for avoiding sedimentation in the surface water system, should be inspected on a six-monthly basis. This includes all gully sumps, gully traps at rainwater pipe and sumps in channel drains. These should be emptied and cleaned once they are at or over 60% full. The piped conveyance system is designed to ensure minimum self-cleansing velocities and should require little or no ongoing maintenance. The site attenuation will be provided by means of a series of chambers arranged in rows. These chambers are open along their length and incorporate an ‘isolator row’ in their construction through which all of the first flush rainfall enters the attenuation system. It is this first flush rainfall which carries the sediment entering the system. A manhole is constructed at each end of the isolator row which allows for access and maintenance of this row including removal of sediment. A copy of the operation and maintenance manual from the system manufacturer is appended to this report detailing how this isolator row functions and how it is cleaned and maintained. RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Grit, debris and silt removal should be carried out by suction cleaning after temporary closing off of the outlet pipe from the system at the downstream manhole to prevent sediment from the cleaning process exiting the system into the public sewers. All cleaning and maintenance of the system will be carried out by a specialist drain cleaning company with appropriate equipment and experienced personnel. All silt, grit and debris will be disposed of to a licensed waste management facility. Construction Phase Following completion of the construction of the piped drainage system and associated manholes etc and prior to their connection to the soakaway system, the pipes and manholes will be cleaned by a specialist drain cleaning contractor and the wash water removed by suction pumping. This will be completed prior to the attenuation system being made operational and opened to the piped drainage system. This will ensure that the attenuation soakaway system will not become an outlet for the cleaning water and associated sediment etc. Silt fences will be erected inside the boundary of the construction site as necessary in order to prevent run-off of silt laden water from the construction areas to adjacent areas of the site or adjoining sites. RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Maintenance & Safety Data Sheets (Hydro-Brake and Attenuation System) RECEIVED: 02/04/2026 22 Call StormTech at 860.529.8188 or 888.892.2694 or visit our website at www.stormtech.com for technical and product information. 13.0 Inspection & Maintenance 13.4 ISOLATOR™ ROW INSPECTION Regular inspection and maintenance are essential to assure a properly functioning stormwater system. Inspection is easily accomplished through the manhole or optional inspection ports of an Isolator Row. Please follow local and OSHA rules for a confined space entry. Inspection ports can allow inspection to be accomplished completely from the surface without the need for a con- fined space entry. Inspection ports provide visual access to the system with the use of a flashlight. A stadia rod may be inserted to determine the depth of sediment. If upon visual inspection it is found that sediment has accumulated to an average depth exceeding 3" (76 mm), cleanout is required. A StormTech Isolator Row should initially be inspected immediately after completion of the site’s construction. While every effort should be made to prevent sediment from entering the system during construction, it is during this time that excess amounts of sediments are most likely to enter any stormwater system. Inspection and maintenance, if necessary, should be performed prior to passing responsibility over to the site’s owner. Once in normal service, a StormTech Isolator Row should be inspected bi-annually until an understanding of the sites characteristics is developed. The site’s maintenance manager can then revise the inspection schedule based on experience or local requirements. 13.5 ISOLATOR ROW MAINTENANCE JetVac maintenance is required if sediment has been col- lected to an average depth of 3" (76 mm) or more inside the Isolator Row. The JetVac process utilizes a high pressure water nozzle to propel itself down the Isolator Row while scouring and suspending sediments. As the nozzle is retrieved, a wave of suspended sediments is flushed back into the manhole for vacuuming. Most sewer and pipe maintenance companies have vacuum/ JetVac combination vehicles. Fixed nozzles designed for culverts or large diameter pipe cleaning are preferable. Rear facing jets with an effective spread of at least 45" (1140 mm) are best. Most JetVac reels have a mini- mum of 400 feet (122 m) of hose allowing maintenance of an Isolator Row up to 50 chambers long. The JetVac process shall only be performed on StormTech Rows that have AASHTO class 1 woven geotextile over their angular base stone. Looking down the Isolator Row. A typical JetVac truck. (This is not a StormTech product.) Examples of culvert cleaning nozzles appropriate for Isolator Row maintenance. (These are not StormTech products.)RECEIVED: 02/04/2026 Call StormTech at 860.529.8188 or 888.892.2694 or visit our website at www.stormtech.com for technical and product information.23 STORMTECH ISOLATOR™ROW - STEP-BY-STEP MAINTENANCE PROCEDURES Step 1)Inspect Isolator Row for sediment A) Inspection ports (if present) i. Remove lid from floor box frame ii. Remove cap from inspection riser iii. Using a flashlight and stadia rod, measure depth of sediment iv. If sediment is at, or above, 3" (76 mm) depth proceed to Step 2. If not proceed to step 3. B) All Isolator Rows i. Remove cover from manhole at upstream end of Isolator Row ii. Using a flashlight, inspect down Isolator Row through outlet pipe 1. Mirrors on poles or cameras may be used to avoid a confined space entry 2. Follow OSHA regulations for confined space entry if entering manhole iii. If sediment is at or above the lower row of sidewall holes [approximately 3" (76 mm)] proceed to Step 2. If not proceed to Step 3. Step 2)Clean out Isolator Row using the JetVac process A) A fixed culvert cleaning nozzle with rear facing nozzle spread of 45" (1140 mm) or more is preferable B) Apply multiple passes of JetVac until backflush water is clean C) Vacuum manhole sump as required Step 3) Replace all caps, lids and covers Step 4)Inspect and clean catch basins and manholes upstream of the StormTech system following the procedures for Classic Manifold Inlet System 4 2 1) B)1) A) Figure 19 StormTech Isolator Row (not to scale)RECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Appendix 7 Standard Construction Details RECEIVED: 02/04/2026 ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9746645 e: info@alanclarke.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9746645 e: info@alanclarke.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 SUNNYSIDE HOUSE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9754726 e: alanclarke@iol.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9746645 e: info@alanclarke.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 SUNNYSIDE HOUSE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9754726 e: alanclarke@iol.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9746645 e: info@alanclarke.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9746645 e: info@alanclarke.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9746645 e: info@alanclarke.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9746645 e: info@alanclarke.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9746645 e: info@alanclarke.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN p: 042-9740071 f: 042-9746645 e: info@alanclarke.ie ALAN CLARKE & ASSOCIATES consulting civil & structural engineers project title scale drawing no rev dateRECEIVED: 02/04/2026 A L A N C L A R K E & A S S O C I A T E S CASTLEBLAYNEY ENTERPRISE CENTRE, DUBLIN ROAD, CASTLEBLAYNEY, CO MONAGHAN t: 042 9740071 f: 042 9746645 e: info@alanclarke.ie www.alanclarke.ie Appendix 8 Longitudinal Sewer Sections RECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Foul Network 1 Alan Clarke 22/01/2026 Page 1 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Node Name Length (m) Invert Level (m) Cover Level (m) Slope (1:X) SecƟon Type Link Name 1 17.19678.25077.65079.75028.7 150mm 1.000 2 21.93576.45076.08479.00059.9 150mm 1.001 3 21.93576.08475.40077.75032.1 150mm 1.002 4 5.92275.40075.36076.750148.1 150mm 1.003 5 20.18074.90074.20076.75028.8 150mm 1.004 6 75.550Datum (m) 71.000 Ver Scale 50 Hor Scale 500 A3 drawing RECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Foul Network 1 Alan Clarke 22/01/2026 Page 2 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Node Name Length (m) Invert Level (m) Cover Level (m) Slope (1:X) SecƟon Type Link Name 7 11.94476.65076.45078.00059.7 150mm 2.000 2 79.000Datum (m) 72.000 Ver Scale 50 Hor Scale 500 A3 drawing RECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Storm Network 1 Alan Clarke 22/01/2026 Page 1 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Node Name Length (m) Invert Level (m) Cover Level (m) Slope (1:X) SecƟon Type Link Name 1 19.69877.70077.53679.750120.0 225mm 1.000 2 38.20176.42175.60079.00046.5 300mm 1.001 3 6.41775.36075.33977.250305.6 300mm 1.002 4 27.68174.47574.12577.25079.1 225mm 1.003 5 75.550Datum (m) 71.000 Ver Scale 50 Hor Scale 500 A3 drawing RECEIVED: 02/04/2026 Alan Clarke & Associates Ltd File: 26104 FLOW.PFD Network: Storm Network 1 Alan Clarke 22/01/2026 Page 2 Flow+ v16.0 Copyright © 1988-2026 Causeway Technologies Ltd Node Name Length (m) Invert Level (m) Cover Level (m) Slope (1:X) SecƟon Type Link Name 6 20.16076.57576.49678.000255.2 225mm 2.000 2 79.000Datum (m) 72.000 Ver Scale 50 Hor Scale 500 A3 drawing RECEIVED: 02/04/2026 ENTERPRISE CENTREDUBLIN ROAD, CASTLEBLAYNEYCO MONAGHANp: 042-9740071f: 042-9746645e: info@alanclarke.ieclientprojecttitlearchitectdatejob noscaledrawing norevamendmentsdaterevALAN CLARKE& ASSOCIATESconsulting civil & structural engineers78.577.075.5 75.5 7 6 . 5 76.0 78.078.078.074.5 75 . 0 75. 574.575.076.076.076.576.576.575.575.577.077.077.077.577.577.582.582.077.077.5 7 8 . 0 78.0 78.578.578.578.579.079.079.0 79.579.579.5 80.080.080.0 80.581.081.578.3778.3279.0679.0979.5279.4379.5879.7379. 9 0 80.0080.1480.1880.0179.7179.2278.0177.6576.8177.0777.0776.6676.2876.1476.2776.1276.0876.0776.5876.5477.1377.6177.5378.1078.7378.3779.1379.1878.1777.6880.4980.3080.3079.5179.1178.2177.5680.2380.2079.8279.6279.7386.9784 3984 4684 5384.9285 5896.0392.8897.0089.2290.6980.1981 7781.8082 1277.4377.2877.8177.9778.2478.1476.0378.3578.1978.1678.0177.5477.6776.8176.6476.4575.7275.2874.2174.4174.2574.4374.6475.4876.3577 3578.0578.8878.3180.4576.4875.8775.8275.72 75.5875.5975.7175.6875.4975.2375.1274.9974.9174.7574.3974.3474.6374.9075.3775.9976.5977.2977.9878.1778.1677.5376.8977.0976.9576.7176.1076.0175.8875.7475.5875.4675.3475.32 75.30 75.3275.9175.8375.6975.61 75.70 75.54 75.4575.6975.6675.52 75.6475.63 75.8975.8175.83 75.9875.84 75.9075.8578.2977.6477.3977.3576.7176.3375.2975.6675 7475.9376.4776.4476.6676.6776.9577.0277.5277.2877.8877.8778.4778.9578.7378.6278.5178.1879.0179.2679.3479.6179.6080.1280.0179.9379.6979.4178.4178.9279.3979.9280.0279.8280.3280.5880.8179.2679.0378.6677.6881.7482.7682.9282.8581.8081.4676.7577.1977.4977.8277.7677.9281.6976.0475.5575.3075.2475.2175.3075.3976.2476.7477.3378.2277.8377.6877.4276.5976.0776.1875.3775.43MHMHLPLPLPICICGGGGGGEPEPSTOPSTOPRECEIVED: 02/04/2026