Revised Stormwater Management Report

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 38 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 22S: Basin 6 - Imp Runoff = 13.99 cfs @ 12.11 hrs, Volume= Routed to Pond 24P : Basin 6 47,267 cf, Depth= 4.98" 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 10-Year Rainfall=5.22" Area (sf) 10,890 26,136 41,818 34,987 113,831 113,831 CN 98 98 98 98 98 Tc (min) 0.6 Length (feet) 40 3.0 3.6 450 490 Description Roofs, HSG D Paved parking, HSG D Roofs, HSG C Paved parking, HSG C Weighted Average 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.19 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 2.50 Direct Entry, Pipe Flow (B-C) Total Subcatchment 22S: Basin 6 - Imp Hydrograph Runoff 15 13.99 cfs 14 13 12 11 Flow (cfs) 10 9 8 7 6 5 4 3 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=113,831 sf Runoff Volume=47,267 cf Runoff Depth=4.98" Flow Length=490' Slope=0.0200 '/' Tc=3.6 min CN=98 2 1 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 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 39 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 22S: Basin 6 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.06 0.00 2.00 0.13 0.02 3.00 0.20 0.07 4.00 0.27 0.12 5.00 0.36 0.19 6.00 0.45 0.27 7.00 0.55 0.36 8.00 0.68 0.48 9.00 0.83 0.63 10.00 1.03 0.82 11.00 1.36 1.14 12.00 2.50 2.27 13.00 3.86 3.63 14.00 4.19 3.95 15.00 4.39 4.16 16.00 4.54 4.31 17.00 4.67 4.43 18.00 4.77 4.54 19.00 4.86 4.63 20.00 4.95 4.71 21.00 5.02 4.79 22.00 5.09 4.86 23.00 5.16 4.92 24.00 5.22 4.98 25.00 5.22 4.98 26.00 5.22 4.98 27.00 5.22 4.98 28.00 5.22 4.98 29.00 5.22 4.98 30.00 5.22 4.98 31.00 5.22 4.98 32.00 5.22 4.98 33.00 5.22 4.98 34.00 5.22 4.98 35.00 5.22 4.98 36.00 5.22 4.98 37.00 5.22 4.98 38.00 5.22 4.98 39.00 5.22 4.98 40.00 5.22 4.98 41.00 5.22 4.98 42.00 5.22 4.98 43.00 5.22 4.98 44.00 5.22 4.98 45.00 5.22 4.98 46.00 5.22 4.98 47.00 5.22 4.98 48.00 5.22 4.98 49.00 5.22 4.98 50.00 5.22 4.98 Runoff (cfs) 0.00 0.02 0.09 0.13 0.16 0.19 0.21 0.28 0.34 0.41 0.62 1.12 8.30 1.30 0.66 0.45 0.37 0.31 0.25 0.23 0.21 0.20 0.18 0.17 0.15 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 5.22 4.98 52.00 5.22 4.98 53.00 5.22 4.98 54.00 5.22 4.98 55.00 5.22 4.98 56.00 5.22 4.98 57.00 5.22 4.98 58.00 5.22 4.98 59.00 5.22 4.98 60.00 5.22 4.98 61.00 5.22 4.98 62.00 5.22 4.98 63.00 5.22 4.98 64.00 5.22 4.98 65.00 5.22 4.98 66.00 5.22 4.98 67.00 5.22 4.98 68.00 5.22 4.98 69.00 5.22 4.98 70.00 5.22 4.98 71.00 5.22 4.98 72.00 5.22 4.98 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

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 40 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 23S: Basin 6 - Perv Runoff = 4.99 cfs @ 12.11 hrs, Volume= Routed to Pond 24P : Basin 6 14,073 cf, Depth= 2.54" 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 10-Year Rainfall=5.22" Area (sf) 66,461 66,461 Tc (min) 0.6 Length (feet) 40 3.0 3.6 450 490 CN 74 Description >75% Grass cover, Good, HSG C 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.19 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 2.50 Direct Entry, Pipe Flow (B-C) Total Subcatchment 23S: Basin 6 - Perv Hydrograph Runoff 4.99 cfs 5 Flow (cfs) 4 3 2 1 0 0 2 4 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=66,461 sf Runoff Volume=14,073 cf Runoff Depth=2.54" Flow Length=490' Slope=0.0200 '/' Tc=3.6 min CN=74 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 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 41 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 23S: Basin 6 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.06 0.00 2.00 0.13 0.00 3.00 0.20 0.00 4.00 0.27 0.00 5.00 0.36 0.00 6.00 0.45 0.00 7.00 0.55 0.00 8.00 0.68 0.00 9.00 0.83 0.00 10.00 1.03 0.03 11.00 1.36 0.10 12.00 2.50 0.61 13.00 3.86 1.50 14.00 4.19 1.73 15.00 4.39 1.89 16.00 4.54 2.01 17.00 4.67 2.10 18.00 4.77 2.19 19.00 4.86 2.26 20.00 4.95 2.32 21.00 5.02 2.38 22.00 5.09 2.44 23.00 5.16 2.49 24.00 5.22 2.54 25.00 5.22 2.54 26.00 5.22 2.54 27.00 5.22 2.54 28.00 5.22 2.54 29.00 5.22 2.54 30.00 5.22 2.54 31.00 5.22 2.54 32.00 5.22 2.54 33.00 5.22 2.54 34.00 5.22 2.54 35.00 5.22 2.54 36.00 5.22 2.54 37.00 5.22 2.54 38.00 5.22 2.54 39.00 5.22 2.54 40.00 5.22 2.54 41.00 5.22 2.54 42.00 5.22 2.54 43.00 5.22 2.54 44.00 5.22 2.54 45.00 5.22 2.54 46.00 5.22 2.54 47.00 5.22 2.54 48.00 5.22 2.54 49.00 5.22 2.54 50.00 5.22 2.54 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.06 0.19 2.60 0.55 0.29 0.20 0.17 0.14 0.11 0.10 0.10 0.09 0.09 0.08 0.07 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 5.22 2.54 52.00 5.22 2.54 53.00 5.22 2.54 54.00 5.22 2.54 55.00 5.22 2.54 56.00 5.22 2.54 57.00 5.22 2.54 58.00 5.22 2.54 59.00 5.22 2.54 60.00 5.22 2.54 61.00 5.22 2.54 62.00 5.22 2.54 63.00 5.22 2.54 64.00 5.22 2.54 65.00 5.22 2.54 66.00 5.22 2.54 67.00 5.22 2.54 68.00 5.22 2.54 69.00 5.22 2.54 70.00 5.22 2.54 71.00 5.22 2.54 72.00 5.22 2.54 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

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 42 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 26S: DA 1 Und - Perv Runoff = 5.01 cfs @ 12.14 hrs, Volume= Routed to Link 25L : POA 1 16,094 cf, Depth= 2.81" 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 10-Year Rainfall=5.22" Area (sf) 34,475 34,300 68,775 68,775 Tc (min) 6.9 Length (feet) 100 0.2 50 7.1 150 CN 80 74 77 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.1100 0.24 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.1100 5.34 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 26S: DA 1 Und - Perv Hydrograph Runoff 5.01 cfs 5 Flow (cfs) 4 3 2 1 0 0 2 4 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=68,775 sf Runoff Volume=16,094 cf Runoff Depth=2.81" Flow Length=150' Slope=0.1100 '/' Tc=7.1 min CN=77 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 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 43 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 26S: DA 1 Und - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.06 0.00 2.00 0.13 0.00 3.00 0.20 0.00 4.00 0.27 0.00 5.00 0.36 0.00 6.00 0.45 0.00 7.00 0.55 0.00 8.00 0.68 0.00 9.00 0.83 0.02 10.00 1.03 0.06 11.00 1.36 0.15 12.00 2.50 0.74 13.00 3.86 1.71 14.00 4.19 1.96 15.00 4.39 2.12 16.00 4.54 2.25 17.00 4.67 2.35 18.00 4.77 2.44 19.00 4.86 2.51 20.00 4.95 2.58 21.00 5.02 2.64 22.00 5.09 2.70 23.00 5.16 2.76 24.00 5.22 2.81 25.00 5.22 2.81 26.00 5.22 2.81 27.00 5.22 2.81 28.00 5.22 2.81 29.00 5.22 2.81 30.00 5.22 2.81 31.00 5.22 2.81 32.00 5.22 2.81 33.00 5.22 2.81 34.00 5.22 2.81 35.00 5.22 2.81 36.00 5.22 2.81 37.00 5.22 2.81 38.00 5.22 2.81 39.00 5.22 2.81 40.00 5.22 2.81 41.00 5.22 2.81 42.00 5.22 2.81 43.00 5.22 2.81 44.00 5.22 2.81 45.00 5.22 2.81 46.00 5.22 2.81 47.00 5.22 2.81 48.00 5.22 2.81 49.00 5.22 2.81 50.00 5.22 2.81 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.09 0.23 2.33 0.64 0.32 0.22 0.18 0.15 0.13 0.11 0.11 0.10 0.09 0.08 0.08 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 5.22 2.81 52.00 5.22 2.81 53.00 5.22 2.81 54.00 5.22 2.81 55.00 5.22 2.81 56.00 5.22 2.81 57.00 5.22 2.81 58.00 5.22 2.81 59.00 5.22 2.81 60.00 5.22 2.81 61.00 5.22 2.81 62.00 5.22 2.81 63.00 5.22 2.81 64.00 5.22 2.81 65.00 5.22 2.81 66.00 5.22 2.81 67.00 5.22 2.81 68.00 5.22 2.81 69.00 5.22 2.81 70.00 5.22 2.81 71.00 5.22 2.81 72.00 5.22 2.81 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

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 44 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 27S: Basin 5 - Perv Runoff = 0.27 cfs @ 12.10 hrs, Volume= Routed to Pond 18P : Basin 5 728 cf, Depth= 2.54" 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 10-Year Rainfall=5.22" Area (sf) 3,436 3,436 Tc (min) 0.6 Length (feet) 40 1.2 1.8 182 222 CN 74 Description >75% Grass cover, Good, HSG C 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.19 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 2.50 Direct Entry, Pipe Flow (B-C) Total Subcatchment 27S: Basin 5 - Perv Hydrograph 0.3 Runoff 0.28 0.27 cfs 0.26 0.24 0.22 Flow (cfs) 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=3,436 sf Runoff Volume=728 cf Runoff Depth=2.54" Flow Length=222' Slope=0.0200 '/' Tc=1.8 min CN=74 0.04 0.02 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 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 45 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 27S: Basin 5 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.06 0.00 2.00 0.13 0.00 3.00 0.20 0.00 4.00 0.27 0.00 5.00 0.36 0.00 6.00 0.45 0.00 7.00 0.55 0.00 8.00 0.68 0.00 9.00 0.83 0.00 10.00 1.03 0.03 11.00 1.36 0.10 12.00 2.50 0.61 13.00 3.86 1.50 14.00 4.19 1.73 15.00 4.39 1.89 16.00 4.54 2.01 17.00 4.67 2.10 18.00 4.77 2.19 19.00 4.86 2.26 20.00 4.95 2.32 21.00 5.02 2.38 22.00 5.09 2.44 23.00 5.16 2.49 24.00 5.22 2.54 25.00 5.22 2.54 26.00 5.22 2.54 27.00 5.22 2.54 28.00 5.22 2.54 29.00 5.22 2.54 30.00 5.22 2.54 31.00 5.22 2.54 32.00 5.22 2.54 33.00 5.22 2.54 34.00 5.22 2.54 35.00 5.22 2.54 36.00 5.22 2.54 37.00 5.22 2.54 38.00 5.22 2.54 39.00 5.22 2.54 40.00 5.22 2.54 41.00 5.22 2.54 42.00 5.22 2.54 43.00 5.22 2.54 44.00 5.22 2.54 45.00 5.22 2.54 46.00 5.22 2.54 47.00 5.22 2.54 48.00 5.22 2.54 49.00 5.22 2.54 50.00 5.22 2.54 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.14 0.03 0.01 0.01 0.01 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 Time Precip. Excess (hours) (inches) (inches) 51.00 5.22 2.54 52.00 5.22 2.54 53.00 5.22 2.54 54.00 5.22 2.54 55.00 5.22 2.54 56.00 5.22 2.54 57.00 5.22 2.54 58.00 5.22 2.54 59.00 5.22 2.54 60.00 5.22 2.54 61.00 5.22 2.54 62.00 5.22 2.54 63.00 5.22 2.54 64.00 5.22 2.54 65.00 5.22 2.54 66.00 5.22 2.54 67.00 5.22 2.54 68.00 5.22 2.54 69.00 5.22 2.54 70.00 5.22 2.54 71.00 5.22 2.54 72.00 5.22 2.54 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

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 46 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Pond 16P: Basin 1 Inflow Area = 378,971 sf, 51.29% Impervious, Inflow Depth = 1.43" for 10-Year event Inflow = 13.05 cfs @ 12.20 hrs, Volume= 45,251 cf Outflow = 0.60 cfs @ 14.80 hrs, Volume= 35,148 cf, Atten= 95%, Lag= 155.8 min Primary = 0.60 cfs @ 14.80 hrs, Volume= 35,148 cf Routed to Link 25L : POA 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs Peak Elev= 544.40' @ 14.80 hrs Surf.Area= 34,414 sf Storage= 30,179 cf Plug-Flow detention time= 718.0 min calculated for 35,148 cf (78% of inflow) Center-of-Mass det. time= 629.5 min ( 1,436.9 - 807.3 ) Volume #1 Invert 543.50' Elevation (feet) 543.50 544.00 545.00 546.00 547.00 Avail.Storage 126,759 cf Surf.Area (sq-ft) 32,670 33,541 35,719 37,897 39,640 Device #1 Routing Primary Invert 546.00' #2 Primary 543.75' Storage Description Custom Stage Data (Prismatic) Listed below (Recalc) Inc.Store (cubic-feet) 0 16,553 34,630 36,808 38,769 Cum.Store (cubic-feet) 0 16,553 51,183 87,991 126,759 Outlet Devices 42.0" x 48.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads 6.0" Vert. Orifice C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.60 cfs @ 14.80 hrs HW=544.40' (Free Discharge) 1=Grate ( Controls 0.00 cfs) 2=Orifice (Orifice Controls 0.60 cfs @ 3.05 fps)

POA 1 proposed 2024-05-12 HydroCad - Proposed POA 1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 47 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Pond 16P: Basin 1 Hydrograph Inflow Primary 13.05 cfs 14 Inflow Area=378,971 sf Peak Elev=544.40' Storage=30,179 cf 13 12 11 10 Flow (cfs) 9 8 7 6 5 4 3 2 0.60 cfs 1 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) Pond 16P: Basin 1 Stage-Discharge 547 Primary Grate Elevation (feet) 546 545 544 Orifice 0 5 10 15 20 25 30 Discharge (cfs) 35 40 45 50