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Home My WebLink About2660287 - Drawings - General - Drainage Proposal ReportA 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 Proposals and Standard Construction Details for Proposed Commercial Showroom at Lakeview Business Park, Castleblayney Co. Monaghan for Irwin Tile Importers Ltd June 2026 RECEIVED: 08/07/2026 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 Commercial Showroom, at Lakeview Business Park, Castleblayney, Co. Monaghan Proposed Development The proposed new showroom will be constructed on an existing commercial site at Lakeview Business Park, Castleblayney, Co. Monaghan. The works will consist of the construction of a two-storey commercial building, external show area, parking areas and associated site works. An existing warehouse is located at the south-west of the site. The existing warehouse and associated drainage will be retained unaltered. Surface Water Sewer An existing surface water sewer serving the adjoining sites and public road is located within the site along the north-eastern boundary. It is proposed to provide a new surface water pipe network within the site and connect and discharge the surface water runoff from the new showroom roof and hardstanding areas to the existing storm sewer at a restricted rate. The proposed surface water drainage 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, avoid any increase in the pre- development flood risk associated with the receiving water course (hydraulic criteria), reduce urban run-off pollutants and improve storm water quality before discharge (water quality criteria). 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 – 1.00 Existing Concrete Yard – 0.85 Contributing Areas Proposed Roof 1014m2 x 1.00 = 1014m2 Proposed & Existing Hardstanding 3224m2 x 0.90 = 2901m2 RECEIVED: 08/07/2026 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 Hydraulic Criteria Hydraulic Criteria will be met by controlling the rate of discharge of surface water from the roof surface on the developed site to match pre-development run-off rates. The attenuation system has been designed to contain the runoff for the 100 year storm based on the most onerous rainfall profile from the full range of rainfall data. The rainfall figures (from Met Eireann) have been increased by 20% to allow for climate change. The proposed 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. 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 (Q bar) 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 = 1.4 l/sec Qbar for 30 year return period = 2.6 l/sec Qbar for 100 year return period = 3.1 l/sec Attenuation Volume for the Proposed Development Site The proposed development has a relatively small site area (0.58ha) and the greenfield run-off rate is extremely low and it is generally considered impractical to restrict run-off rates to less than 2.0 l/s as the orifice sizes in the flow restrictors are required to be so small that they present an unacceptably high risk of blockage and consequent flooding of properties. A practical minimum discharge rate from the site of 2.0 l/sec has been adopted in the design of the drainage system and in running of storm simulations to analyse the pipe network. 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 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 events. These water levels remain within RECEIVED: 08/07/2026 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 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 233.2m3. This storage is provided entirely within the below ground attenuation chambers which will consist of 110No. Stormtech SC-740 underground stormwater chambers (or similar approved), in 2No. areas of 104No. SC-740 chambers and 6No. SC-740 chambers, as shown on the site layout drawing 25195-500 Rev P1. 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; 110No. chambers having a storage capacity of 233.2m3. 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 at the northern end of the site restricts the outflow to the predetermined runoff rate of 2.0 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. Foul Sewer Calculations The new foul sewer pipe network serving the proposed showroom will connect and discharge to the existing foul sewer located within the site as indicated on the site layout drawing 25195- 500 Rev P1. The pipe network for the proposed development has been designed based on the number of appliances and associated discharge units for the proposed showroom. The foul sewer drainage network has been modelled using the Causeway Flow design software. The above discharge from the building has been applied to the drainage network at the appropriate manhole locations. 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 (25195-500 Rev P1) indicates the proposed foul sewer layout. RECEIVED: 08/07/2026 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: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Foul Network 1 Alan Clarke 11/06/2026 Page 1 Flow+ v17.0 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 0 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 Units Cover Level (m) Diameter (mm) EasƟng (m) Northing (m) Depth (m) Invert Level (m) 1 2 3 4 8.3 91.450 91.450 91.450 91.450 1200 1200 1200 1200 62.376 59.376 49.555 36.417 4.780 4.780 4.780 36.333 1.350 1.400 1.564 2.418 90.100 90.050 89.886 89.032 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 Pro Vel @ 1/3 Q (m/s) Vel (m/s) Cap (l/s) Flow (l/s) US Depth (m) DS Depth (m) Σ Area (ha) Σ Dwellings (ha) Σ Units (ha) Σ Add InŇow (ha) Pro Depth (mm) Pro Velocity (m/s) 1.000 1 2 3.000 0.060 90.100 90.050 0.050 60.0 150 1.000 0.614 1.654 29.2 1.4 1.200 1.250 0.000 0 8.3 0.0 23 0.866 1.001 2 3 9.821 0.060 90.050 89.886 0.164 59.9 150 1.001 0.614 1.656 29.3 1.4 1.250 1.414 0.000 0 8.3 0.0 23 0.867 1.002 3 4 34.179 0.060 89.886 89.032 0.854 40.0 150 1.002 0.719 2.045 36.1 1.4 1.414 2.268 0.000 0 8.3 0.0 20 1.005 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 3.000 60.0 150 uPVC 91.450 90.100 1.200 91.450 90.050 1.250 1.000 1 1200 Manhole Adoptable 2 1200 Manhole Adoptable 1.001 9.821 59.9 150 uPVC 91.450 90.050 1.250 91.450 89.886 1.414 1.001 2 1200 Manhole Adoptable 3 1200 Manhole Adoptable 1.002 34.179 40.0 150 uPVC 91.450 89.886 1.414 91.450 89.032 2.268 1.002 3 1200 Manhole Adoptable 4 1200 Manhole Adoptable Manhole Schedule Node EasƟng (m) Northing (m) CL (m) Depth (m) Dia (mm) ConnecƟons Link IL (m) Dia (mm) 1 62.376 4.780 91.450 1.350 1200 0 0 1.000 90.100 150RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Foul Network 1 Alan Clarke 11/06/2026 Page 2 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Manhole Schedule Node EasƟng (m) Northing (m) CL (m) Depth (m) Dia (mm) ConnecƟons Link IL (m) Dia (mm) 2 3 4 59.376 49.555 36.417 4.780 4.780 36.333 91.450 91.450 91.450 1.400 1.564 2.418 1200 1200 1200 10 1 0 1 1 0 1 0 1 1.000 1.001 1.001 1.002 1.002 90.050 90.050 89.886 89.886 89.032 150 150 150 150 150RECEIVED: 08/07/2026 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: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 1 Flow+ v17.0 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 16.900 0.270 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) Diameter (mm) EasƟng (m) Northing (m) Depth (m) Invert Level (m) 1 2 3 6 7 8 9 4 5 10 11 12 13 14 0.019 0.000 0.037 0.083 0.044 0.000 0.051 0.000 0.000 0.019 0.019 0.043 0.018 0.043 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 91.250 91.450 91.450 91.300 91.450 91.400 91.450 91.450 91.350 91.250 91.250 91.450 91.450 91.450 1200 1200 1200 1200 1200 1200 1200 1200 1200 127.976 92.761 46.616 115.416 104.349 104.349 93.303 34.292 3.103 120.183 103.680 87.079 51.556 66.979 5.738 3.302 3.302 24.884 24.884 32.902 32.902 32.902 32.902 5.199 4.057 3.302 3.302 3.302 1.425 1.764 1.944 1.425 1.619 1.601 1.695 2.145 2.132 1.456 1.521 1.786 1.925 1.865 89.825 89.686 89.506 89.875 89.831 89.799 89.755 89.305 89.218 89.794 89.729 89.664 89.525 89.585 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 Vel (m/s) Cap (l/s) Flow (l/s) US Depth (m) DS Depth (m) Σ Area (ha) Σ Add InŇow (l/s) Pro Depth (mm) Pro Velocity (m/s) 1.000 1 10 7.812 0.060 89.825 89.794 0.031 252.0 225 5.13 40.8 1.000 1.007 40.0 2.8 1.200 1.231 0.019 0.0 40 0.581 1.001 2 12 5.682 0.060 89.686 89.664 0.022 258.3 225 5.68 39.3 1.001 0.994 39.5 8.1 1.539 1.561 0.057 0.0 69 0.785 1.002 3 4 32.063 0.060 89.506 89.380 0.126 254.5 225 6.89 36.4 1.002 1.002 39.8 26.1 1.719 1.845 0.198 0.0 133 1.067 2.000 6 7 11.067 0.060 89.875 89.831 0.044 251.5 225 5.18 40.6 2.000 1.008 40.1 12.2 1.200 1.394 0.083 0.0 85 0.886 2.001 7 8 8.018 0.060 89.831 89.799 0.032 250.6 225 5.32 40.2 2.001 1.010 40.2 18.5 1.394 1.376 0.127 0.0 107 0.988 2.002 8 9 11.046 0.060 89.799 89.755 0.044 251.0 225 5.50 39.7 2.002 1.009 40.1 18.2 1.376 1.470 0.127 0.0 107 0.987 2.003 9 4 59.011 0.060 89.755 89.380 0.375 157.4 225 6.26 37.8 2.003 1.292 51.4 24.3 1.470 1.845 0.178 0.0 109 1.273 1.003 4 5 31.189 0.060 89.305 89.218 0.087 358.5 300 7.41 35.3 1.003 1.005 71.0 48.0 1.845 1.832 0.376 0.0 181 1.077 1.001_1 10 11 16.542 0.060 89.794 89.729 0.065 254.5 225 5.40 40.0 1.001_1 1.002 39.8 5.5 1.231 1.296 0.038 0.0 56 0.704RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 2 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd 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 Vel (m/s) Cap (l/s) Flow (l/s) US Depth (m) DS Depth (m) Σ Area (ha) Σ Add InŇow (l/s) Pro Depth (mm) Pro Velocity (m/s) 1.002_1 11 2 10.945 0.060 89.729 89.686 0.043 254.5 225 5.59 39.5 1.002_1 1.002 39.8 8.1 1.296 1.539 0.057 0.0 69 0.791 1.004 12 14 20.100 0.060 89.664 89.585 0.079 254.4 225 6.02 38.4 1.004 1.002 39.8 13.9 1.561 1.640 0.100 0.0 92 0.915 1.006 13 3 4.940 0.060 89.525 89.506 0.019 260.0 225 6.36 37.6 1.006 0.990 39.4 21.9 1.700 1.719 0.161 0.0 120 1.016 1.005 14 13 15.423 0.060 89.585 89.525 0.060 257.1 225 6.27 37.8 1.005 0.996 39.6 19.5 1.640 1.700 0.143 0.0 111 0.992 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 7.812 252.0 225 uPVC 91.250 89.825 1.200 91.250 89.794 1.231 1.000 1 1200 Manhole Adoptable 10 JuncƟon 1.001 5.682 258.3 225 uPVC 91.450 89.686 1.539 91.450 89.664 1.561 1.001 2 1200 Manhole Adoptable 12 JuncƟon 1.002 32.063 254.5 225 uPVC 91.450 89.506 1.719 91.450 89.380 1.845 1.002 3 1200 Manhole Adoptable 4 1200 Manhole Adoptable 2.000 11.067 251.5 225 uPVC 91.300 89.875 1.200 91.450 89.831 1.394 2.000 6 1200 Manhole Adoptable 7 1200 Manhole Adoptable 2.001 8.018 250.6 225 uPVC 91.450 89.831 1.394 91.400 89.799 1.376 2.001 7 1200 Manhole Adoptable 8 1200 Manhole Adoptable 2.002 11.046 251.0 225 uPVC 91.400 89.799 1.376 91.450 89.755 1.470 2.002 8 1200 Manhole Adoptable 9 1200 Manhole Adoptable 2.003 59.011 157.4 225 uPVC 91.450 89.755 1.470 91.450 89.380 1.845 2.003 9 1200 Manhole Adoptable 4 1200 Manhole Adoptable 1.003 31.189 358.5 300 uPVC 91.450 89.305 1.845 91.350 89.218 1.832 1.003 4 1200 Manhole Adoptable 5 1200 Manhole Adoptable 1.001_1 16.542 254.5 225 uPVC 91.250 89.794 1.231 91.250 89.729 1.296 1.001_1 10 JuncƟon 11 JuncƟon 1.002_1 10.945 254.5 225 uPVC 91.250 89.729 1.296 91.450 89.686 1.539 1.002_1 11 JuncƟon 2 1200 Manhole Adoptable 1.004 20.100 254.4 225 uPVC 91.450 89.664 1.561 91.450 89.585 1.640 1.004 12 JuncƟon 14 JuncƟon 1.006 4.940 260.0 225 uPVC 91.450 89.525 1.700 91.450 89.506 1.719 1.006 13 JuncƟon 3 1200 Manhole Adoptable 1.005 15.423 257.1 225 uPVC 91.450 89.585 1.640 91.450 89.525 1.700 1.005 14 JuncƟon 13 JuncƟonRECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 3 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Manhole Schedule Node EasƟng (m) Northing (m) CL (m) Depth (m) Dia (mm) ConnecƟons Link IL (m) Dia (mm) 1 2 3 6 7 8 9 4 5 10 11 12 13 127.976 92.761 46.616 115.416 104.349 104.349 93.303 34.292 3.103 120.183 103.680 87.079 51.556 5.738 3.302 3.302 24.884 24.884 32.902 32.902 32.902 32.902 5.199 4.057 3.302 3.302 91.250 91.450 91.450 91.300 91.450 91.400 91.450 91.450 91.350 91.250 91.250 91.450 91.450 1.425 1.764 1.944 1.425 1.619 1.601 1.695 2.145 2.132 1.456 1.521 1.786 1.925 1200 1200 1200 1200 1200 1200 1200 1200 1200 0 10 1 0 0 1 0 1 0 10 1 2 0 1 10 10 10 10 0 1 0 1 0 0 1 0 1 0 1 0 1 2 0 1 1 0 1 0 1 0 1 0 1.000 1.002_1 1.001 1.006 1.002 2.000 2.000 2.001 2.001 2.002 2.002 2.003 2.003 1.002 1.003 1.003 1.000 1.001_1 1.001_1 1.002_1 1.001 1.004 1.005 1.006 89.825 89.686 89.686 89.506 89.506 89.875 89.831 89.831 89.799 89.799 89.755 89.755 89.380 89.380 89.305 89.218 89.794 89.794 89.729 89.729 89.664 89.664 89.525 89.525 225 225 225 225 225 225 225 225 225 225 225 225 225 225 300 300 225 225 225 225 225 225 225 225RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 4 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Manhole Schedule Node EasƟng (m) Northing (m) CL (m) Depth (m) Dia (mm) ConnecƟons Link IL (m) Dia (mm) 14 66.979 3.302 91.450 1.865 10 1 0 1.004 1.005 89.585 89.585 225 225 SimulaƟon Seƫngs Rainfall Methodology Rainfall Events FSR Region M5-60 (mm) RaƟo-R Summer CV Winter CV Analysis Speed Skip Steady State FSR Singular Scotland and Ireland 16.900 0.270 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 ✓ 2.0 2.6 3.1 ✓ 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 0 Node 5 Online Hydro-Brake® Control Flap Valve Replaces Downstream Link Invert Level (m) Design Depth (m) Design Flow (l/s) x x 89.218 1.000 2.0 ObjecƟve Sump Available Product Number Min Outlet Diameter (m) Min Node Diameter (mm) (HE) Minimise upstream storage ✓ CTL-SHE-0067-2000-1000-2000 0.100 1200 RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 5 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Node 5 Online OriĮce Control Flap Valve Replaces Downstream Link x x Invert Level (m) Diameter (m) 90.820 0.030 Discharge Coeĸcient 0.600 Node 5 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) 89.218 Depth (m) Area (m²) Inf Area (m²) Depth (m) Area (m²) Inf Area (m²) Depth (m) Area (m²) Inf Area (m²) 0.000 285.0 285.0 0.762 285.0 330.6 0.763 0.0 330.6 Node 11 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) 89.729 150 Depth (m) Area (m²) Inf Area (m²) Depth (m) Area (m²) Inf Area (m²) Depth (m) Area (m²) Inf Area (m²) 0.000 16.7 400.0 0.762 16.7 454.0 0.763 0.0 454.0RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 6 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Results for 1 year +20% CC CriƟcal Storm DuraƟon. Lowest mass balance: 99.60% 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 89.869 0.044 3.4 0.0609 0.0000 OK 15 minute summer 1 1.000 10 3.3 0.507 0.083 0.0518 15 minute summer 2 12 89.824 0.138 14.5 0.1561 0.0000 OK 15 minute summer 2 1.001 12 19.2 0.847 0.485 0.1497 15 minute summer 3 10 89.856 0.350 37.4 0.5294 0.0000 SURCHARGED 15 minute summer 3 1.002 4 43.8 1.289 1.100 1.2752 15 minute summer 6 10 89.981 0.106 14.7 0.2438 0.0000 OK 15 minute summer 6 2.000 7 14.4 0.682 0.360 0.2339 15 minute summer 7 11 89.963 0.132 22.2 0.2203 0.0000 OK 15 minute summer 7 2.001 8 21.9 0.954 0.545 0.1878 15 minute summer 8 11 89.925 0.126 21.9 0.1419 0.0000 OK 15 minute summer 8 2.002 9 22.1 1.031 0.550 0.2424 15 minute summer 9 11 89.873 0.118 30.7 0.2050 0.0000 OK 15 minute summer 9 2.003 4 32.6 1.167 0.635 1.7973 15 minute summer 4 10 89.787 0.482 67.1 0.5455 0.0000 SURCHARGED 15 minute summer 4 1.003 5 78.8 2.219 1.109 1.1763 960 minute summer 5 660 89.521 0.303 10.0 86.6138 0.0000 OK 960 minute summer 5 Hydro-Brake®2.0 103.3 960 minute summer 5 OriĮce 0.0 0.0 15 minute summer 10 10 89.851 0.057 6.7 0.0149 0.0000 OK 15 minute summer 10 1.001_1 11 6.6 0.846 0.167 0.2213 15 minute summer 11 12 89.842 0.113 14.2 1.9088 0.0000 OK 15 minute summer 11 1.002_1 2 14.5 0.851 0.364 0.2484 15 minute summer 12 11 89.825 0.161 25.1 0.0777 0.0000 OK 15 minute summer 12 1.004 14 24.0 0.961 0.602 0.7053 15 minute summer 13 10 89.842 0.317 32.1 0.0592 0.0000 SURCHARGED 15 minute summer 13 1.006 3 34.1 0.968 0.865 0.1965 15 minute summer 14 11 89.827 0.242 29.9 0.1114 0.0000 SURCHARGED 15 minute summer 14 1.005 13 29.7 0.963 0.751 0.6134RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 7 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Results for 30 year +20% CC CriƟcal Storm DuraƟon. Lowest mass balance: 99.18% 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 12 90.138 0.313 7.5 0.4380 0.0000 SURCHARGED 15 minute summer 1 1.000 10 6.8 0.591 0.170 0.3107 15 minute summer 2 12 90.119 0.433 33.3 0.4902 0.0000 SURCHARGED 15 minute summer 2 1.001 12 35.4 1.073 0.896 0.2260 15 minute summer 3 11 90.011 0.505 55.7 0.7640 0.0000 SURCHARGED 15 minute summer 3 1.002 4 57.1 1.435 1.433 1.2752 15 minute summer 6 11 90.459 0.584 32.5 1.3415 0.0000 SURCHARGED 15 minute summer 6 2.000 7 29.5 0.742 0.736 0.4401 15 minute summer 7 11 90.427 0.596 46.1 0.9986 0.0000 SURCHARGED 15 minute summer 7 2.001 8 44.9 1.128 1.117 0.3189 15 minute summer 8 11 90.365 0.566 44.9 0.6398 0.0000 SURCHARGED 15 minute summer 8 2.002 9 46.2 1.163 1.152 0.4393 15 minute summer 9 11 90.293 0.538 63.3 0.9315 0.0000 SURCHARGED 15 minute summer 9 2.003 4 64.3 1.616 1.251 2.3469 1440 minute winter 4 1350 89.900 0.595 9.4 0.6734 0.0000 SURCHARGED 1440 minute winter 4 1.003 5 9.3 0.740 0.130 2.1963 1440 minute winter 5 1380 89.900 0.682 9.3 195.1414 0.0000 OK 1440 minute winter 5 Hydro-Brake®2.0 146.1 1440 minute winter 5 OriĮce 0.0 0.0 15 minute summer 10 12 90.136 0.342 13.9 0.0892 0.0000 SURCHARGED 15 minute summer 10 1.001_1 11 12.6 0.928 0.315 0.6579 15 minute summer 11 12 90.126 0.397 44.2 6.7321 0.0000 SURCHARGED 15 minute summer 11 1.002_1 2 32.8 1.005 0.824 0.4353 15 minute summer 12 12 90.115 0.451 38.1 0.2174 0.0000 SURCHARGED 15 minute summer 12 1.004 14 40.5 1.100 1.017 0.7994 15 minute summer 13 12 90.041 0.516 47.6 0.0965 0.0000 SURCHARGED 15 minute summer 13 1.006 3 49.1 1.236 1.248 0.1965 15 minute summer 14 12 90.086 0.501 43.9 0.2311 0.0000 SURCHARGED 15 minute summer 14 1.005 13 45.5 1.143 1.147 0.6134RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 8 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Results for 100 year +20% CC CriƟcal Storm DuraƟon. Lowest mass balance: 99.23% 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) 1440 minute winter 1 1080 90.895 1.070 0.6 1.4954 0.0000 SURCHARGED 1440 minute winter 1 1.000 10 0.7 0.321 0.018 0.3107 1440 minute winter 2 1080 90.894 1.208 3.1 1.3667 0.0000 SURCHARGED 1440 minute winter 2 1.001 12 -3.1 0.451 -0.079 0.2260 1440 minute winter 3 1110 90.894 1.388 5.9 2.0982 0.0000 SURCHARGED 1440 minute winter 3 1.002 4 5.9 0.695 0.149 1.2752 1440 minute winter 6 1080 90.894 1.019 2.6 2.3399 0.0000 SURCHARGED 1440 minute winter 6 2.000 7 2.6 0.499 0.065 0.4401 1440 minute winter 7 1080 90.894 1.063 4.0 1.7803 0.0000 SURCHARGED 1440 minute winter 7 2.001 8 4.0 0.670 0.100 0.3189 1440 minute winter 8 1080 90.894 1.095 4.0 1.2380 0.0000 SURCHARGED 1440 minute winter 8 2.002 9 4.0 0.680 0.100 0.4393 1440 minute winter 9 1080 90.893 1.138 5.6 1.9727 0.0000 SURCHARGED 1440 minute winter 9 2.003 4 5.6 0.810 0.109 2.3469 1440 minute winter 4 1110 90.894 1.589 11.5 1.7970 0.0000 SURCHARGED 1440 minute winter 4 1.003 5 12.3 0.746 0.174 2.1963 1440 minute winter 5 1110 90.894 1.676 12.3 219.2081 0.0000 OK 1440 minute winter 5 Hydro-Brake®2.5 173.2 1440 minute winter 5 OriĮce 0.5 2.1 1440 minute winter 10 1080 90.895 1.101 1.2 0.2873 0.0000 SURCHARGED 1440 minute winter 10 1.001_1 11 1.2 0.441 0.030 0.6579 1440 minute winter 11 1080 90.895 1.165 3.6 13.0251 0.0000 SURCHARGED 1440 minute winter 11 1.002_1 2 -3.1 0.539 -0.078 0.4353 1440 minute winter 12 1080 90.894 1.230 3.6 0.5929 0.0000 SURCHARGED 1440 minute winter 12 1.004 14 3.1 0.598 0.078 0.7994 1440 minute winter 13 1110 90.894 1.369 4.9 0.2559 0.0000 SURCHARGED 1440 minute winter 13 1.006 3 4.8 0.647 0.121 0.1965 1440 minute winter 14 1080 90.893 1.308 4.4 0.6030 0.0000 SURCHARGED 1440 minute winter 14 1.005 13 4.4 0.637 0.110 0.6134RECEIVED: 08/07/2026 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: 08/07/2026 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) + – © OpenStreetMap (https://www.openstreetmap.org/copyright) contributors. ha 11/06/2026 E.Lennon Irwins Tiles & Flooring 2.2.3 Irwins Lakeview, Castleblayney 282580 320294 682513 820302 0.58 RECEIVED: 08/07/2026 Greenfield runoff Method Method IH124 My value Map value SAAR (mm)993 How should SPR be derived? WRAP soil type 2 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 (2.2.3) 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. IH124 mm WRAP soil type 2 l/s 13 l/s l/s l/s l/s l/s l/s 993 0.3 1.6 0.85 0.95 1.4 1.65 1.95 2.15 IH124 1.4 1.5 2.2 2.6 3.1 3.4 RECEIVED: 08/07/2026 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 June 2026) RECEIVED: 08/07/2026 Latitude 54.12509 Longitude -6.73757 Easting 282529.2 Northing 320306.7 Duration 0.5 yrs 1 yrs 2 yrs 3 yrs 4 yrs 5 yrs 10 yrs 20 yrs 30 yrs 50 yrs 75 yrs 100 yrs 120 yrs 5 mins 2.8 3.9 4.5 5.4 6 6.5 8 9.7 10.8 12.4 13.8 14.9 15.7 10 mins 3.7 5.1 5.8 6.9 7.7 8.3 10.1 12.2 13.6 15.5 17.2 18.5 19.3 15 mins 4.3 5.9 6.8 8 8.9 9.5 11.6 14 15.5 17.6 19.5 20.9 21.9 30 mins 5.7 7.8 8.8 10.4 11.4 12.2 14.7 17.6 19.4 21.9 24.1 25.9 27 1 hour 7.5 10.1 11.4 13.3 14.6 15.6 18.7 22.1 24.3 27.3 29.9 32 33.3 2 hours 10 13.2 14.8 17.2 18.7 19.9 23.7 27.8 30.4 34 37.1 39.5 41.1 3 hours 11.7 15.4 17.2 19.9 21.7 23 27.2 31.8 34.7 38.7 42.1 44.7 46.5 4 hours 13.2 17.2 19.2 22.1 24 25.5 30 34.9 38.1 42.3 46 48.9 50.7 6 hours 15.5 20.1 22.4 25.6 27.8 29.4 34.5 39.9 43.4 48.1 52.2 55.3 57.4 9 hours 18.3 23.5 26 29.7 32.1 33.9 39.6 45.7 49.5 54.7 59.2 62.6 64.9 12 hours 20.5 26.2 29 33 35.6 37.6 43.7 50.2 54.4 60 64.8 68.4 70.8 18 hours 24.2 30.6 33.8 38.3 41.2 43.4 50.2 57.5 62 68.2 73.5 77.4 80 24 hours 27.1 34.2 37.6 42.5 45.6 48 55.4 63.2 68.1 74.7 80.3 84.5 87.3 2 days 33.8 41.8 45.6 51.1 54.5 57.1 65.1 73.5 78.7 85.6 91.5 95.9 98.8 3 days 39.6 48.4 52.5 58.4 62.2 65 73.6 82.5 88 95.4 101.6 106.2 109.2 4 days 44.8 54.3 58.8 65.1 69.1 72.1 81.2 90.6 96.5 104.2 110.7 115.5 118.7 6 days 54.2 65 70.1 77.1 81.6 84.9 95 105.3 111.7 120.1 127.2 132.4 135.8 8 days 62.8 74.8 80.3 88.1 92.9 96.5 107.5 118.6 125.5 134.5 142 147.6 151.3 10 days 71 83.9 90 98.3 103.5 107.4 119.1 131 138.3 147.9 155.9 161.8 165.6 12 days 78.8 92.7 99.1 108 113.6 117.7 130.1 142.7 150.4 160.5 168.9 175.1 179.2 16 days 93.6 109.3 116.5 126.4 132.6 137.1 150.9 164.8 173.2 184.2 193.4 200.1 204.5 20 days 107.8 125.1 132.9 143.8 150.5 155.5 170.4 185.5 194.6 206.4 216.3 223.5 228.2 25 days 124.9 144 152.7 164.6 172 177.4 193.7 210.1 219.9 232.8 243.4 251.2 256.3RECEIVED: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 RECEIVED: 08/07/2026 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: 08/07/2026 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 Details of Isolator Row incorporated into Stormtech Attenuation Chambers RECEIVED: 08/07/2026 THE MOST ADVANCED NAME IN WATER MANAGEMENT SOLUTIONS ® Isolator ® Row PLUS O&M Manual An company SC-740 FLAMP MC-3500 RECEIVED: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 ADS “Terms and Conditions of Sale” can be found on the ADS website,www.ads-pipe.com Advanced Drainage Systems and the ADS logo is a registered trademark of Advanced Drainage Systems, Inc.Advanced Drainage Systems, Inc. #0601T 02/12 ADS GEOSYNTHETICS 0601T NONWOVEN GEOTEXTILE Scope This specification describes ADS Geosynthetics 6.0 oz (0601T) nonwoven geotextile. Filter Fabric Requirements ADS Geosynthetics 6.0 oz (0601T) is a needle-punched nonwoven geotextile made of 100% polypropylene staple fibers, which are formed into a random network for dimensional stability. ADS Geosynthetics 6.0 oz (0601T) resists ultraviolet deterioration, rotting, biological degradation, naturally encountered basics and acids. Polypropylene is stable within a pH range of 2 to 13. ADS Geosynthetics 6.0 oz (0601T) conforms to the physical property values listed below: Filter Fabric Properties PROPERTY TESTMETHOD UNIT M.A.R.V. (Minimum Average Roll Value) Weight (Typical) ASTM D 5261 oz/yd2 (g/m2)6.0 (203) Grab Tensile ASTM D 4632 lbs (kN) 160 (0.711) Grab Elongation ASTM D 4632 % 50 Trapezoid Tear Strength ASTM D 4533 lbs (kN) 60 (0.267) CBR Puncture Resistance ASTM D 6241 lbs (kN) 410 (1.82) Permittivity* ASTM D 4491 sec-1 1.5 Water Flow* ASTM D 4491 gpm/ft2 (l/min/m2)110 (4480) AOS* ASTM D 4751 US Sieve (mm) 70 (0.212) UV Resistance ASTM D 4355 %/hrs 70/500 PACKAGING Roll Dimensions (W x L) – ft 12.5 x 360 /15x300 Square Yards Per Roll 500 Estimated Roll Weight – lbs 195 * At the time of manufacturing. Handling may change these properties.RECEIVED: 08/07/2026 ADS “Terms and Conditions of Sale” can be found on the ADS website,www.ads-pipe.com Advanced Drainage Systems and the ADS logo is a registered trademark of Advanced Drainage Systems, Inc.Advanced Drainage Systems, Inc. #315W 02/12 ADS GEOSYNTHETICS 315W WOVEN GEOTEXTILE Scope This specification describes ADS Geosynthetics 315W woven geotextile. Filter Fabric Requirements ADS Geosynthetics 315W is manufactured using high tenacity polypropylene yarns that are woven to form a dimensionally stable network, which allows the yarns to maintain their relative position. ADS Geosynthetics 315W resists ultraviolet deterioration, rotting and biological degradation and is inert to commonly encountered soil chemicals. ADS Geosynthetics 315W conforms to the physical property values listed below: Filter Fabric Properties PROPERTY TEST METHOD ENGLISHM.A.R.V. (Minimum Average Roll Value) METRICM.A.R.V. (Minimum Average Roll Value) Tensile Strength (Grab) ASTM D-4632 315 lbs 1400 N Elongation ASTM D-4632 15% 15% CBR Puncture ASTM D-6241 900 lbs 4005 N Puncture ASTM D-4833 150 lbs 667 N Mullen Burst ASTM D-3786 600 psi 4134 kPa Trapezoidal Tear ASTM D-4533 120 lbs 533 N UV Resistance (at 500 hrs) ASTM D-4355 70% 70% Apparent Opening Size (AOS)* ASTM D-4751 40 US Std. Sieve 0.425 mm Permittivity ASTM D-4491 .05 sec‾1 .05 sec‾1 Water Flow Rate ASTM D-4491 4 gpm/ft2 163 l/min/m2 Roll Sizes 12.5’ x 360’ 15.0’ x 300’ 17.5’ x 258’ 3.81 m x 109.8 m 4.57 m x 91.5 m 5.33 m x 78.6 m *Maximum average roll value.RECEIVED: 08/07/2026 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: 08/07/2026 Microstrain Ltd. T/A CubicM3, Unit B3, Metropoint Business Park, Swords, K67 NP22, Co. Dublin, Ireland Tel: + 353-1-8084330 ▪ Web: cubicM3.com ▪ email: sales@cubicM3.com ▪ VAT: IE6388558A ▪ Co. Reg: 368558 DATA SHEET HYDRO-BRAKE WARRANTY & MAINTENANCE DOCUMENT RECEIVED: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 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: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Foul Network 1 Alan Clarke 11/06/2026 Page 1 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Node Name Length (m) Invert Level (m) Cover Level (m) Slope (1:X) SecƟon Type Link Name 1 3.00090.10090.05091.45060.0 150mm 1.000 2 9.82190.05089.88691.45059.9 150mm 1.001 3 34.17989.88689.03291.45040.0 150mm 1.002 4 91.450Datum (m) 86.000 Ver Scale 50 Hor Scale 250 A3 drawing RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 1 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Node Name Length (m) Invert Level (m) Cover Level (m) Slope (1:X) SecƟon Type Link Name 1 7.81289.82589.79491.250252.0 225mm 1.000 10 16.54289.79489.72991.250254.5 225mm 1.001_1 11 10.94589.72989.68691.250254.5 225mm 1.002_1 2 5.68289.68689.66491.450258.3 225mm 1.001 12 20.10089.66489.58591.450254.4 225mm 1.004 14 15.42389.58589.52591.450257.1 225mm 1.005 13 4.94089.52589.50691.450260.0 225mm 1.006 3 91.450Datum (m) 86.000 Ver Scale 50 Hor Scale 250 A3 drawing RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 2 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Node Name Length (m) Invert Level (m) Cover Level (m) Slope (1:X) SecƟon Type Link Name 3 32.06389.50689.38091.450254.5 225mm 1.002 4 31.18989.30589.21891.450358.5 300mm 1.003 5 91.350Datum (m) 86.000 Ver Scale 50 Hor Scale 250 A3 drawing RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 3 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Node Name Length (m) Invert Level (m) Cover Level (m) Slope (1:X) SecƟon Type Link Name 6 11.06789.87589.83191.300251.5 225mm 2.000 7 8.01889.83189.79991.450250.6 225mm 2.001 8 11.04689.79989.75591.400251.0 225mm 2.002 9 91.450Datum (m) 86.000 Ver Scale 50 Hor Scale 250 A3 drawing RECEIVED: 08/07/2026 Alan Clarke & Associates Ltd File: SW FLOW DESIGN FILE.PFD Network: Storm Network 1 Alan Clarke 11/06/2026 Page 4 Flow+ v17.0 Copyright © 1988-2026 Causeway Technologies Ltd Node Name Length (m) Invert Level (m) Cover Level (m) Slope (1:X) SecƟon Type Link Name 9 59.01189.75589.38091.450157.4 225mm 2.003 4 91.450Datum (m) 86.000 Ver Scale 50 Hor Scale 250 A3 drawing RECEIVED: 08/07/2026