complete drainage report rev 9

21S 24S 19S 20S 29S 30S Basin 4 - Imp Basin 4 - Perv Basin 3 - Imp 15775.6 Basin 8 - Imp Basin 8 - Perv 22P 21P 48P 53S 54S 51S 52S 45S 46S Basin 4 Basin 3 Basin 8 Basin 9 - Imp Basin 9 - Perv Basin 10 - Imp Basin 10 - Perv Basin 11 - Imp Basin 11 - Perv 28S 27P 25S 31S 49P 32S 42P 41P 33P Basin 2 - Imp Basin 2 Basin 2 - Perv Basin 7 - Imp Basin 7 Basin 7 - Perv Basin 9 Basin 10 Basin 11 35S DA 2 Und - Imp 34L DA 2 Undetained Subcat Reach Pond Link 28L 36S POA 2 DA 2 Und - Perv Routing Diagram for 2024-05-12 HydroCad - Proposed POA 2B-1 Prepared by Anderson Consulting Services, Printed 10/25/2024 HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 Printed 10/25/2024 Page 2 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Rainfall Events Listing Event# 1 2 3 4 Event Name Storm Type Curve Mode Duration (hours) B/B 2-Year 10-Year 100-Year WQ NOAA 24-hr NOAA 24-hr NOAA 24-hr NJ DEP 2-hr D D D Default Default Default Default 24.00 24.00 24.00 2.00 1 1 1 1 Depth (inches) 3.44 5.22 8.66 1.25 AMC 2 2 2 2

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 3 Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 218,596 74 158,046 52,660 33,009 1,307 28,866 80,914 30,122 948 24,014 17,858 22,270 1,147 39,048 13,382 722,187 80 98 98 98 98 98 98 98 98 98 98 98 98 98 87 >75% Grass cover, Good, HSG C (20S, 24S, 25S, 30S, 32S, 36S, 46S, 52S, 54S) >75% Grass cover, Good, HSG D (25S, 30S, 32S, 36S, 46S, 52S, 54S) Paved parking, HSG C (19S, 21S, 35S, 51S) Paved parking, HSG D (35S) Paved parking, sidewalk other imp (28S) Paved parking, sidewalk, other imp (28S) Roofs, HSG C (29S, 45S, 51S) Roofs, HSG D (21S, 35S) impervious other than pavement (19S) other impervious (29S, 31S, 45S, 53S) pavement surface (29S) pavement surface area/ porous (45S) roofs (53S) vehicle pavement surface (31S) vehicle surface area (53S) TOTAL AREA

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 4 Soil Listing (all nodes) Area (sq-ft) Soil Group 0 0 352,170 221,177 148,840 722,187 HSG A HSG B HSG C HSG D Other Subcatchment Numbers 19S, 20S, 21S, 24S, 25S, 29S, 30S, 32S, 35S, 36S, 45S, 46S, 51S, 52S, 54S 21S, 25S, 30S, 32S, 35S, 36S, 46S, 52S, 54S 19S, 28S, 29S, 31S, 45S, 53S TOTAL AREA

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 5 Ground Covers (all nodes) HSG-A (sq-ft) HSG-B (sq-ft) HSG-C (sq-ft) HSG-D (sq-ft) Other (sq-ft) Total (sq-ft) 0 0 218,596 158,046 0 376,642 0 0 0 0 52,660 0 33,009 0 0 1,307 85,669 1,307 0 0 0 0 28,866 28,866 0 0 0 0 80,914 0 30,122 0 0 948 111,036 948 0 0 0 0 0 0 0 0 24,014 17,858 24,014 17,858 0 0 0 0 22,270 22,270 0 0 0 0 0 0 0 0 1,147 39,048 1,147 39,048 0 0 0 0 13,382 13,382 0 0 352,170 221,177 148,840 722,187 Ground Cover >75% Grass cover, Good Paved parking Paved parking, sidewalk other imp Paved parking, sidewalk, other imp Roofs impervious other than pavement other impervious pavement surface pavement surface area/ porous roofs vehicle pavement surface vehicle surface area TOTAL AREA

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 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-2 2024-05-12 HydroCad - Proposed POA 2B-1 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=0.00-80.00 hrs, dt=0.04 hrs, 2001 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=6,824 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=98 Runoff=0.47 cfs 1,824 cf Subcatchment 19S: Basin 3 - Imp Runoff Area=15,086 sf 0.00% Impervious Runoff Depth=1.20" Flow Length=75' Slope=0.0400 '/' Tc=8.3 min CN=74 Runoff=0.43 cfs 1,507 cf Subcatchment 20S: 15775.6 Runoff Area=41,524 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=755' Slope=0.0200 '/' Tc=5.5 min CN=98 Runoff=3.13 cfs 11,096 cf Subcatchment 21S: Basin 4 - Imp Runoff Area=7,526 sf 0.00% Impervious Runoff Depth=1.20" Flow Length=755' Slope=0.0200 '/' Tc=5.5 min CN=74 Runoff=0.24 cfs 752 cf Subcatchment 24S: Basin 4 - Perv Subcatchment 25S: Basin 2 - Perv Runoff Area=82,260 sf 0.00% Impervious Runoff Depth=1.39" Flow Length=463' Tc=10.5 min CN=77 Runoff=2.54 cfs 9,502 cf Subcatchment 28S: Basin 2 - Imp Runoff Area=30,173 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=463' Tc=10.5 min CN=98 Runoff=1.91 cfs 8,063 cf Subcatchment 29S: Basin 8 - Imp Runoff Area=38,257 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=165' Tc=8.6 min CN=98 Runoff=2.60 cfs 10,223 cf Subcatchment 30S: Basin 8 - Perv Runoff Area=22,787 sf 0.00% Impervious Runoff Depth=1.39" Flow Length=165' Tc=8.6 min CN=77 Runoff=0.76 cfs 2,632 cf Subcatchment 31S: Basin 7 - Imp Runoff Area=45,778 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=760' Tc=12.5 min CN=98 Runoff=2.74 cfs 12,233 cf Subcatchment 32S: Basin 7 - Perv Runoff Area=58,678 sf 0.00% Impervious Runoff Depth=1.39" Flow Length=760' Tc=12.5 min CN=77 Runoff=1.70 cfs 6,778 cf Subcatchment 35S: DA 2 Und - Imp Runoff Area=52,513 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=160' Tc=9.8 min CN=98 Runoff=3.41 cfs 14,033 cf Subcatchment 36S: DA 2 Und - Perv Runoff Area=119,952 sf 0.00% Impervious Runoff Depth=1.39" Flow Length=160' Tc=9.8 min CN=77 Runoff=3.80 cfs 13,855 cf Subcatchment 45S: Basin 11 - Imp Runoff Area=59,901 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=233'

mpervious Runoff Depth=1.39" Flow Length=160' Tc=9.8 min CN=77 Runoff=3.80 cfs 13,855 cf Subcatchment 45S: Basin 11 - Imp Runoff Area=59,901 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=233' Tc=9.8 min CN=98 Runoff=3.89 cfs 16,007 cf Subcatchment 46S: Basin 11 - Perv Runoff Area=24,202 sf 0.00% Impervious Runoff Depth=1.32" Flow Length=233' Tc=9.8 min CN=76 Runoff=0.73 cfs 2,666 cf Subcatchment 51S: Basin 10 - Imp Runoff Area=53,114 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=379' Tc=10.7 min CN=98 Runoff=3.35 cfs 14,193 cf Subcatchment 52S: Basin 10 - Perv Runoff Area=37,235 sf 0.00% Impervious Runoff Depth=1.26" Flow Length=379' Tc=10.7 min CN=75 Runoff=1.03 cfs 3,908 cf

POA-2 2024-05-12 HydroCad - Proposed POA 2B-1 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 Subcatchment 53S: Basin 9 - Imp Runoff Area=17,461 sf 100.00% Impervious Runoff Depth=3.21" Flow Length=140' Tc=7.4 min CN=98 Runoff=1.23 cfs 4,666 cf Subcatchment 54S: Basin 9 - Perv Runoff Area=8,916 sf 0.00% Impervious Runoff Depth=1.45" Flow Length=140' Tc=7.4 min CN=78 Runoff=0.33 cfs 1,079 cf Pond 21P: Basin 3 Peak Elev=559.02' Storage=33 cf Inflow=0.90 cfs 3,330 cf Discarded=0.89 cfs 3,330 cf Primary=0.00 cfs 0 cf Outflow=0.89 cfs 3,330 cf Pond 22P: Basin 4 Peak Elev=572.30' Storage=1,477 cf Inflow=3.37 cfs 11,848 cf Discarded=1.13 cfs 11,848 cf Primary=0.00 cfs 0 cf Outflow=1.13 cfs 11,848 cf Pond 27P: Basin 2 Peak Elev=544.96' Storage=12,418 cf Inflow=4.44 cfs 17,565 cf Outflow=0.19 cfs 8,254 cf Pond 33P: Basin 11 Peak Elev=590.13' Storage=717 cf Inflow=4.62 cfs 18,673 cf Discarded=3.13 cfs 18,638 cf Primary=0.10 cfs 35 cf Outflow=3.23 cfs 18,673 cf Pond 41P: Basin 10 Peak Elev=576.17' Storage=1,586 cf Inflow=4.37 cfs 18,101 cf Discarded=2.22 cfs 18,101 cf Primary=0.00 cfs 0 cf Outflow=2.22 cfs 18,101 cf Pond 42P: Basin 9 Peak Elev=562.24' Storage=640 cf Inflow=1.55 cfs 5,745 cf Discarded=0.61 cfs 5,745 cf Primary=0.00 cfs 0 cf Outflow=0.61 cfs 5,745 cf Pond 48P: Basin 8 Peak Elev=573.11' Storage=434 cf Inflow=3.35 cfs 12,855 cf Discarded=2.44 cfs 12,855 cf Primary=0.00 cfs 0 cf Outflow=2.44 cfs 12,855 cf Pond 49P: Basin 7 Peak Elev=531.74' Storage=11,169 cf Inflow=4.44 cfs 19,011 cf Outflow=0.53 cfs 13,242 cf Link 28L: POA 2 Inflow=7.24 cfs 49,419 cf Primary=7.24 cfs 49,419 cf Link 34L: DA 2 Undetained Inflow=7.21 cfs 27,888 cf Primary=7.21 cfs 27,888 cf Total Runoff Area = 722,187 sf Runoff Volume = 135,016 cf Average Runoff Depth = 2.24" 52.15% Pervious = 376,642 sf 47.85% Impervious = 345,545 sf

POA-2 NOAA 24-hr D 2-Year Rainfall=3.44" 2024-05-12 HydroCad - Proposed POA 2B-1 Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 9 Summary for Subcatchment 19S: Basin 3 - Imp Runoff = 0.47 cfs @ 12.15 hrs, Volume= Routed to Pond 21P : Basin 3 1,824 cf, Depth= 3.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area (sf) 5,876 948 6,824 6,824 * CN 98 98 98 Description Paved parking, HSG C impervious other than pavement Weighted Average 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 75 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Sheet Flow (A-B) Subcatchment 19S: Basin 3 - Imp Subcatchment 19S: Basin 3 - Imp Flow (cfs) Hydrograph 0.52 0.5 0.48 0.46 0.44 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 Runoff 0.47 cfs NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=6,824 sf Runoff Volume=1,824 cf Runoff Depth=3.21" Flow Length=75' Slope=0.0400 '/' Tc=8.3 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 74 76 78 80 Time (hours)