complete drainage report rev 9

POA-3 2024-05-12 HydroCad - Proposed POA 3B Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 0.000 0.178 0.000 0.000 0.178 HSG A HSG B HSG C HSG D Other 28S, 30S TOTAL AREA Printed 10/25/2024 Page 4

POA-3 2024-05-12 HydroCad - Proposed POA 3B Printed 10/25/2024 Page 5 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Ground Covers (all nodes) HSG-A (acres) HSG-B (acres) HSG-C (acres) HSG-D (acres) Other (acres) Total (acres) Ground Cover Subcatchment Numbers 0.000 0.000 0.000 0.000 0.000 0.000 0.121 0.057 0.178 0.000 0.000 0.000 0.000 0.000 0.000 0.121 0.057 0.178 >75% Grass cover, Good 30S Paved parking 28S TOTAL AREA

POA-3 2024-05-12 HydroCad - Proposed POA 3B Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 6 Notes Listing (all nodes) Line# Node Number Notes 1 2 3 Project Rainfall events imported from "NJ-2023-Rain.txt" for 6606 NJ Essex Rainfall events imported from "NRCS2-Rain.txt" for 1167 NJ Essex-D Rainfall events imported from "NRCS2-Rain.txt" for 1167 NJ Essex-D

POA-3 2024-05-12 HydroCad - Proposed POA 3B NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 7 Time span=0.00-72.00 hrs, dt=0.01 hrs, 7201 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=2,500 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=110' Slope=0.1200 '/' Tc=4.0 min CN=98 Runoff=0.20 cfs 0.015 af Subcatchment 28S: Basin 12 - Imp Runoff Area=5,251 sf 0.00% Impervious Runoff Depth=1.20" Flow Length=110' Slope=0.1200 '/' Tc=4.0 min CN=74 Runoff=0.18 cfs 0.012 af Subcatchment 30S: Basin 12 - Perv Pond 29P: Basin 12 Peak Elev=596.18' Storage=69 cf Inflow=0.38 cfs 0.027 af Outflow=0.21 cfs 0.027 af Total Runoff Area = 0.178 ac Runoff Volume = 0.027 af Average Runoff Depth = 1.85" 67.75% Pervious = 0.121 ac 32.25% Impervious = 0.057 ac

POA-3 2024-05-12 HydroCad - Proposed POA 3B NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 8 Summary for Subcatchment 28S: Basin 12 - Imp Runoff = 0.20 cfs @ 12.11 hrs, Volume= Routed to Pond 29P : Basin 12 0.015 af, Depth= 3.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area (sf) 2,500 2,500 CN 98 Description Paved parking, HSG C 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.8 50 0.1200 0.22 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.2 60 0.1200 5.20 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 4.0 110 Total Sheet Flow (A-B) Subcatchment 28S: Basin 12 - Imp Subcatchment 28S: Basin 12 - Imp Flow (cfs) Hydrograph 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Runoff 0.20 cfs NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=2,500 sf Runoff Volume=0.015 af Runoff Depth=3.21" Flow Length=110' Slope=0.1200 '/' Tc=4.0 min CN=98 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

POA-3 2024-05-12 HydroCad - Proposed POA 3B NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 28S: Basin 12 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.04 0.00 2.00 0.08 0.01 3.00 0.13 0.03 4.00 0.18 0.06 5.00 0.24 0.09 6.00 0.29 0.14 7.00 0.36 0.20 8.00 0.45 0.27 9.00 0.55 0.36 10.00 0.68 0.49 11.00 0.89 0.69 12.00 1.65 1.43 13.00 2.55 2.32 14.00 2.76 2.53 15.00 2.89 2.66 16.00 2.99 2.76 17.00 3.08 2.85 18.00 3.15 2.91 19.00 3.20 2.97 20.00 3.26 3.03 21.00 3.31 3.08 22.00 3.36 3.12 23.00 3.40 3.17 24.00 3.44 3.21 25.00 3.44 3.21 26.00 3.44 3.21 27.00 3.44 3.21 28.00 3.44 3.21 29.00 3.44 3.21 30.00 3.44 3.21 31.00 3.44 3.21 32.00 3.44 3.21 33.00 3.44 3.21 34.00 3.44 3.21 35.00 3.44 3.21 36.00 3.44 3.21 37.00 3.44 3.21 38.00 3.44 3.21 39.00 3.44 3.21 40.00 3.44 3.21 41.00 3.44 3.21 42.00 3.44 3.21 43.00 3.44 3.21 44.00 3.44 3.21 45.00 3.44 3.21 46.00 3.44 3.21 47.00 3.44 3.21 48.00 3.44 3.21 49.00 3.44 3.21 50.00 3.44 3.21 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.02 0.12 0.02 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 51.00 3.44 3.21 52.00 3.44 3.21 53.00 3.44 3.21 54.00 3.44 3.21 55.00 3.44 3.21 56.00 3.44 3.21 57.00 3.44 3.21 58.00 3.44 3.21 59.00 3.44 3.21 60.00 3.44 3.21 61.00 3.44 3.21 62.00 3.44 3.21 63.00 3.44 3.21 64.00 3.44 3.21 65.00 3.44 3.21 66.00 3.44 3.21 67.00 3.44 3.21 68.00 3.44 3.21 69.00 3.44 3.21 70.00 3.44 3.21 71.00 3.44 3.21 72.00 3.44 3.21 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Printed 10/25/2024 Page 9

POA-3 NOAA 24-hr D 2-Year Rainfall=3.44" 2024-05-12 HydroCad - Proposed POA 3B Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 10 Summary for Subcatchment 30S: Basin 12 - Perv Runoff = 0.18 cfs @ 12.12 hrs, Volume= Routed to Pond 29P : Basin 12 0.012 af, Depth= 1.20" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area (sf) 5,251 5,251 CN 74 Description >75% Grass cover, Good, HSG C 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.8 50 0.1200 0.22 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.2 60 0.1200 5.20 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 4.0 110 Total Sheet Flow (A-B) Subcatchment 30S: Basin 12 - Perv Subcatchment 30S: Basin 12 - Perv Hydrograph 0.2 Runoff 0.19 0.18 0.18 cfs NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=5,251 sf Runoff Volume=0.012 af Runoff Depth=1.20" Flow Length=110' Slope=0.1200 '/' Tc=4.0 min CN=74 0.17 0.16 0.15 0.14 Flow (cfs) 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

POA-3 2024-05-12 HydroCad - Proposed POA 3B NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 30S: Basin 12 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.04 0.00 2.00 0.08 0.00 3.00 0.13 0.00 4.00 0.18 0.00 5.00 0.24 0.00 6.00 0.29 0.00 7.00 0.36 0.00 8.00 0.45 0.00 9.00 0.55 0.00 10.00 0.68 0.00 11.00 0.89 0.01 12.00 1.65 0.20 13.00 2.55 0.63 14.00 2.76 0.76 15.00 2.89 0.84 16.00 2.99 0.90 17.00 3.08 0.96 18.00 3.15 1.00 19.00 3.20 1.04 20.00 3.26 1.08 21.00 3.31 1.11 22.00 3.36 1.14 23.00 3.40 1.17 24.00 3.44 1.20 25.00 3.44 1.20 26.00 3.44 1.20 27.00 3.44 1.20 28.00 3.44 1.20 29.00 3.44 1.20 30.00 3.44 1.20 31.00 3.44 1.20 32.00 3.44 1.20 33.00 3.44 1.20 34.00 3.44 1.20 35.00 3.44 1.20 36.00 3.44 1.20 37.00 3.44 1.20 38.00 3.44 1.20 39.00 3.44 1.20 40.00 3.44 1.20 41.00 3.44 1.20 42.00 3.44 1.20 43.00 3.44 1.20 44.00 3.44 1.20 45.00 3.44 1.20 46.00 3.44 1.20 47.00 3.44 1.20 48.00 3.44 1.20 49.00 3.44 1.20 50.00 3.44 1.20 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.09 0.02 0.01 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 51.00 3.44 1.20 52.00 3.44 1.20 53.00 3.44 1.20 54.00 3.44 1.20 55.00 3.44 1.20 56.00 3.44 1.20 57.00 3.44 1.20 58.00 3.44 1.20 59.00 3.44 1.20 60.00 3.44 1.20 61.00 3.44 1.20 62.00 3.44 1.20 63.00 3.44 1.20 64.00 3.44 1.20 65.00 3.44 1.20 66.00 3.44 1.20 67.00 3.44 1.20 68.00 3.44 1.20 69.00 3.44 1.20 70.00 3.44 1.20 71.00 3.44 1.20 72.00 3.44 1.20 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Printed 10/25/2024 Page 11

POA-3 NOAA 24-hr D 2-Year Rainfall=3.44" 2024-05-12 HydroCad - Proposed POA 3B Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 12 Summary for Pond 29P: Basin 12 Inflow Area = Inflow = Outflow = Discarded = 0.178 ac, 32.25% Impervious, Inflow Depth = 1.85" for 2-Year event 0.38 cfs @ 12.12 hrs, Volume= 0.027 af 0.21 cfs @ 12.03 hrs, Volume= 0.027 af, Atten= 45%, Lag= 0.0 min 0.21 cfs @ 12.03 hrs, Volume= 0.027 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs Peak Elev= 596.18' @ 12.18 hrs Surf.Area= 900 sf Storage= 69 cf Plug-Flow detention time= 1.5 min calculated for 0.027 af (100% of inflow) Center-of-Mass det. time= 1.5 min ( 806.3 - 804.8 ) Volume #1 Invert 596.00' Avail.Storage 1,004 cf #2 596.00' 151 cf 1,154 cf Elevation (feet) 596.00 599.00 Device #1 Surf.Area (sq-ft) 900 900 Routing Discarded Invert 596.00' Storage Description Custom Stage Data (Prismatic) Listed below (Recalc) 2,700 cf Overall - 191 cf Embedded = 2,509 cf x 40.0% Voids 8.00'D x 3.00'H Vertical Cone/Cylinder Inside #1 191 cf Overall - 6.0" Wall Thickness = 151 cf Total Available Storage Inc.Store (cubic-feet) 0 2,700 Cum.Store (cubic-feet) 0 2,700 Outlet Devices 10.000 in/hr Exfiltration over Surface area Discarded OutFlow Max=0.21 cfs @ 12.03 hrs HW=596.03' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.21 cfs) Pond 29P: Basin 12 Exfiltration

POA-3 NOAA 24-hr D 2-Year Rainfall=3.44" 2024-05-12 HydroCad - Proposed POA 3B Printed 10/25/2024 Page 13 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 29P: Basin 12 Flow (cfs) Hydrograph 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Discarded 0.38 cfs Inflow Area=0.178 ac Peak Elev=596.18' Storage=69 cf 0.21 cfs 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) Pond 29P: Basin 12 Stage-Discharge 599 Discarded Elevation (feet) 598 597 Exfiltration 596 0 0.02 0.04 0.06 0.08 0.1 0.12 Discharge (cfs) 0.14 0.16 0.18 0.2