Revised Stormwater Management Report

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 171 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 28S: Basin 2 - Imp Runoff = 4.86 cfs @ 12.17 hrs, Volume= Routed to Pond 27P : Basin 2 21,171 cf, Depth= 8.42" 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 100-Year Rainfall=8.66" Area (sf) 28,866 1,307 30,173 30,173 Tc (min) 9.0 1.5 10.5 CN 98 98 98 Description Paved parking, HSG C Paved parking, HSG D Weighted Average 100.00% Impervious Area Length (feet) 93 Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0500 0.17 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 370 0.0650 4.10 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 463 Total Subcatchment 28S: Basin 2 - Imp Hydrograph Runoff 5 Flow (cfs) 4 3 2 4.86 cfs NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=30,173 sf Runoff Volume=21,171 cf Runoff Depth=8.42" Flow Length=463' Tc=10.5 min CN=98 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 74 76 78 80 Time (hours)

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 172 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 28S: Basin 2 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.08 0.01 1.60 0.16 0.05 2.40 0.25 0.11 3.20 0.35 0.19 4.00 0.45 0.28 4.80 0.56 0.38 5.60 0.68 0.48 6.40 0.80 0.60 7.20 0.95 0.74 8.00 1.12 0.91 8.80 1.32 1.10 9.60 1.56 1.34 10.40 1.89 1.67 11.20 2.42 2.19 12.00 4.15 3.91 12.80 6.24 6.00 13.60 6.77 6.53 14.40 7.10 6.86 15.20 7.34 7.10 16.00 7.54 7.30 16.80 7.71 7.47 17.60 7.86 7.62 18.40 7.98 7.74 19.20 8.10 7.86 20.00 8.21 7.97 20.80 8.31 8.07 21.60 8.41 8.17 22.40 8.50 8.26 23.20 8.58 8.34 24.00 8.66 8.42 24.80 8.66 8.42 25.60 8.66 8.42 26.40 8.66 8.42 27.20 8.66 8.42 28.00 8.66 8.42 28.80 8.66 8.42 29.60 8.66 8.42 30.40 8.66 8.42 31.20 8.66 8.42 32.00 8.66 8.42 32.80 8.66 8.42 33.60 8.66 8.42 34.40 8.66 8.42 35.20 8.66 8.42 36.00 8.66 8.42 36.80 8.66 8.42 37.60 8.66 8.42 38.40 8.66 8.42 39.20 8.66 8.42 40.00 8.66 8.42 Runoff (cfs) 0.00 0.01 0.04 0.06 0.07 0.08 0.09 0.10 0.11 0.13 0.15 0.17 0.23 0.31 0.56 2.33 0.77 0.37 0.26 0.19 0.17 0.14 0.12 0.10 0.10 0.09 0.09 0.08 0.08 0.07 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 Time Precip. Excess (hours) (inches)

26 0.19 0.17 0.14 0.12 0.10 0.10 0.09 0.09 0.08 0.08 0.07 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 Time Precip. Excess (hours) (inches) (inches) 40.80 8.66 8.42 41.60 8.66 8.42 42.40 8.66 8.42 43.20 8.66 8.42 44.00 8.66 8.42 44.80 8.66 8.42 45.60 8.66 8.42 46.40 8.66 8.42 47.20 8.66 8.42 48.00 8.66 8.42 48.80 8.66 8.42 49.60 8.66 8.42 50.40 8.66 8.42 51.20 8.66 8.42 52.00 8.66 8.42 52.80 8.66 8.42 53.60 8.66 8.42 54.40 8.66 8.42 55.20 8.66 8.42 56.00 8.66 8.42 56.80 8.66 8.42 57.60 8.66 8.42 58.40 8.66 8.42 59.20 8.66 8.42 60.00 8.66 8.42 60.80 8.66 8.42 61.60 8.66 8.42 62.40 8.66 8.42 63.20 8.66 8.42 64.00 8.66 8.42 64.80 8.66 8.42 65.60 8.66 8.42 66.40 8.66 8.42 67.20 8.66 8.42 68.00 8.66 8.42 68.80 8.66 8.42 69.60 8.66 8.42 70.40 8.66 8.42 71.20 8.66 8.42 72.00 8.66 8.42 72.80 8.66 8.42 73.60 8.66 8.42 74.40 8.66 8.42 75.20 8.66 8.42 76.00 8.66 8.42 76.80 8.66 8.42 77.60 8.66 8.42 78.40 8.66 8.42 79.20 8.66 8.42 80.00 8.66 8.42 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 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

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 173 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 29S: Basin 8 - Imp Runoff = 6.80 cfs @ 12.15 hrs, Volume= Routed to Pond 48P : Basin 8 27,647 cf, Depth= 8.42" 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 100-Year Rainfall=8.66" Area (sf) 24,632 14,771 39,403 39,403 Tc (min) 8.3 Length (feet) 100 0.3 65 8.6 165 CN 98 98 98 Description Paved parking, HSG C Paved parking, HSG D Weighted Average 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0700 0.20 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.0600 3.94 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 29S: Basin 8 - Imp Hydrograph Runoff 7 6 Flow (cfs) 5 4 3 2 6.80 cfs NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=39,403 sf Runoff Volume=27,647 cf Runoff Depth=8.42" Flow Length=165' Tc=8.6 min CN=98 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 74 76 78 80 Time (hours)

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 174 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 29S: Basin 8 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.08 0.01 1.60 0.16 0.05 2.40 0.25 0.11 3.20 0.35 0.19 4.00 0.45 0.28 4.80 0.56 0.38 5.60 0.68 0.48 6.40 0.80 0.60 7.20 0.95 0.74 8.00 1.12 0.91 8.80 1.32 1.10 9.60 1.56 1.34 10.40 1.89 1.67 11.20 2.42 2.19 12.00 4.15 3.91 12.80 6.24 6.00 13.60 6.77 6.53 14.40 7.10 6.86 15.20 7.34 7.10 16.00 7.54 7.30 16.80 7.71 7.47 17.60 7.86 7.62 18.40 7.98 7.74 19.20 8.10 7.86 20.00 8.21 7.97 20.80 8.31 8.07 21.60 8.41 8.17 22.40 8.50 8.26 23.20 8.58 8.34 24.00 8.66 8.42 24.80 8.66 8.42 25.60 8.66 8.42 26.40 8.66 8.42 27.20 8.66 8.42 28.00 8.66 8.42 28.80 8.66 8.42 29.60 8.66 8.42 30.40 8.66 8.42 31.20 8.66 8.42 32.00 8.66 8.42 32.80 8.66 8.42 33.60 8.66 8.42 34.40 8.66 8.42 35.20 8.66 8.42 36.00 8.66 8.42 36.80 8.66 8.42 37.60 8.66 8.42 38.40 8.66 8.42 39.20 8.66 8.42 40.00 8.66 8.42 Runoff (cfs) 0.00 0.02 0.06 0.08 0.09 0.11 0.12 0.13 0.14 0.17 0.20 0.23 0.30 0.40 0.75 3.43 0.97 0.47 0.34 0.24 0.21 0.19 0.16 0.14 0.13 0.12 0.12 0.11 0.10 0.09 0.09 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)

34 0.24 0.21 0.19 0.16 0.14 0.13 0.12 0.12 0.11 0.10 0.09 0.09 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) 40.80 8.66 8.42 41.60 8.66 8.42 42.40 8.66 8.42 43.20 8.66 8.42 44.00 8.66 8.42 44.80 8.66 8.42 45.60 8.66 8.42 46.40 8.66 8.42 47.20 8.66 8.42 48.00 8.66 8.42 48.80 8.66 8.42 49.60 8.66 8.42 50.40 8.66 8.42 51.20 8.66 8.42 52.00 8.66 8.42 52.80 8.66 8.42 53.60 8.66 8.42 54.40 8.66 8.42 55.20 8.66 8.42 56.00 8.66 8.42 56.80 8.66 8.42 57.60 8.66 8.42 58.40 8.66 8.42 59.20 8.66 8.42 60.00 8.66 8.42 60.80 8.66 8.42 61.60 8.66 8.42 62.40 8.66 8.42 63.20 8.66 8.42 64.00 8.66 8.42 64.80 8.66 8.42 65.60 8.66 8.42 66.40 8.66 8.42 67.20 8.66 8.42 68.00 8.66 8.42 68.80 8.66 8.42 69.60 8.66 8.42 70.40 8.66 8.42 71.20 8.66 8.42 72.00 8.66 8.42 72.80 8.66 8.42 73.60 8.66 8.42 74.40 8.66 8.42 75.20 8.66 8.42 76.00 8.66 8.42 76.80 8.66 8.42 77.60 8.66 8.42 78.40 8.66 8.42 79.20 8.66 8.42 80.00 8.66 8.42 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 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

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 175 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 30S: Basin 8 - Perv Runoff = 3.19 cfs @ 12.16 hrs, Volume= Routed to Pond 48P : Basin 8 11,171 cf, Depth= 5.88" 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 100-Year Rainfall=8.66" Area (sf) 11,542 11,245 22,787 22,787 Tc (min) 8.3 Length (feet) 100 0.3 65 8.6 165 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) 0.0700 0.20 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.0600 3.94 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 30S: Basin 8 - Perv Hydrograph Runoff 3.19 cfs Flow (cfs) 3 2 1 0 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=22,787 sf Runoff Volume=11,171 cf Runoff Depth=5.88" Flow Length=165' Tc=8.6 min CN=77 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)

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 176 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 30S: Basin 8 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.08 0.00 1.60 0.16 0.00 2.40 0.25 0.00 3.20 0.35 0.00 4.00 0.45 0.00 4.80 0.56 0.00 5.60 0.68 0.00 6.40 0.80 0.01 7.20 0.95 0.04 8.00 1.12 0.08 8.80 1.32 0.14 9.60 1.56 0.24 10.40 1.89 0.39 11.20 2.42 0.69 12.00 4.15 1.93 12.80 6.24 3.69 13.60 6.77 4.16 14.40 7.10 4.45 15.20 7.34 4.67 16.00 7.54 4.85 16.80 7.71 5.01 17.60 7.86 5.14 18.40 7.98 5.26 19.20 8.10 5.36 20.00 8.21 5.46 20.80 8.31 5.56 21.60 8.41 5.65 22.40 8.50 5.73 23.20 8.58 5.81 24.00 8.66 5.88 24.80 8.66 5.88 25.60 8.66 5.88 26.40 8.66 5.88 27.20 8.66 5.88 28.00 8.66 5.88 28.80 8.66 5.88 29.60 8.66 5.88 30.40 8.66 5.88 31.20 8.66 5.88 32.00 8.66 5.88 32.80 8.66 5.88 33.60 8.66 5.88 34.40 8.66 5.88 35.20 8.66 5.88 36.00 8.66 5.88 36.80 8.66 5.88 37.60 8.66 5.88 38.40 8.66 5.88 39.20 8.66 5.88 40.00 8.66 5.88 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.03 0.05 0.07 0.12 0.26 1.49 0.49 0.24 0.18 0.13 0.11 0.10 0.08 0.07 0.07 0.07 0.06 0.06 0.05 0.05 0.05 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)

18 0.13 0.11 0.10 0.08 0.07 0.07 0.07 0.06 0.06 0.05 0.05 0.05 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) 40.80 8.66 5.88 41.60 8.66 5.88 42.40 8.66 5.88 43.20 8.66 5.88 44.00 8.66 5.88 44.80 8.66 5.88 45.60 8.66 5.88 46.40 8.66 5.88 47.20 8.66 5.88 48.00 8.66 5.88 48.80 8.66 5.88 49.60 8.66 5.88 50.40 8.66 5.88 51.20 8.66 5.88 52.00 8.66 5.88 52.80 8.66 5.88 53.60 8.66 5.88 54.40 8.66 5.88 55.20 8.66 5.88 56.00 8.66 5.88 56.80 8.66 5.88 57.60 8.66 5.88 58.40 8.66 5.88 59.20 8.66 5.88 60.00 8.66 5.88 60.80 8.66 5.88 61.60 8.66 5.88 62.40 8.66 5.88 63.20 8.66 5.88 64.00 8.66 5.88 64.80 8.66 5.88 65.60 8.66 5.88 66.40 8.66 5.88 67.20 8.66 5.88 68.00 8.66 5.88 68.80 8.66 5.88 69.60 8.66 5.88 70.40 8.66 5.88 71.20 8.66 5.88 72.00 8.66 5.88 72.80 8.66 5.88 73.60 8.66 5.88 74.40 8.66 5.88 75.20 8.66 5.88 76.00 8.66 5.88 76.80 8.66 5.88 77.60 8.66 5.88 78.40 8.66 5.88 79.20 8.66 5.88 80.00 8.66 5.88 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 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

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 177 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 31S: Basin 7 - Imp Runoff = 7.12 cfs @ 12.20 hrs, Volume= Routed to Pond 49P : Basin 7 32,846 cf, Depth= 8.42" 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 100-Year Rainfall=8.66" Area (sf) 15,723 31,089 46,812 46,812 Tc (min) 8.9 Length (feet) 83 1.1 272 0.1 40 2.4 12.5 365 760 CN 98 98 98 Description Paved parking, HSG D Paved parking, HSG C Weighted Average 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 0.0600 3.94 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 0.0670 5.25 Shallow Concentrated Flow, SCF (C-D) Paved Kv= 20.3 fps 2.50 Direct Entry, Pipe Flow Total Subcatchment 31S: Basin 7 - Imp Hydrograph Runoff 7.12 cfs 7 6 Flow (cfs) 5 4 3 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=46,812 sf Runoff Volume=32,846 cf Runoff Depth=8.42" Flow Length=760' Tc=12.5 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 74 76 78 80 Time (hours)