Revised Stormwater Management Report

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 27 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 46S: Basin 11 - Perv Runoff = 0.56 cfs @ 12.18 hrs, Volume= Routed to Pond 33P : Basin 11 2,043 cf, Depth= 1.26" 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) 2,920 16,544 19,464 19,464 Tc (min) 8.9 Length (feet) 83 0.9 150 9.8 233 CN 80 74 75 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) 0.0400 0.15 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 0.0330 2.92 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 46S: Basin 11 - Perv Hydrograph Runoff 0.6 0.56 cfs 0.55 0.5 0.45 Flow (cfs) 0.4 0.35 0.3 0.25 0.2 0.15 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=19,464 sf Runoff Volume=2,043 cf Runoff Depth=1.26" Flow Length=233' Tc=9.8 min CN=75 0.1 0.05 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 28 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 46S: Basin 11 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.03 0.00 1.60 0.06 0.00 2.40 0.10 0.00 3.20 0.14 0.00 4.00 0.18 0.00 4.80 0.22 0.00 5.60 0.27 0.00 6.40 0.32 0.00 7.20 0.38 0.00 8.00 0.45 0.00 8.80 0.52 0.00 9.60 0.62 0.00 10.40 0.75 0.00 11.20 0.96 0.02 12.00 1.65 0.22 12.80 2.48 0.64 13.60 2.69 0.76 14.40 2.82 0.84 15.20 2.92 0.91 16.00 2.99 0.96 16.80 3.06 1.00 17.60 3.12 1.04 18.40 3.17 1.07 19.20 3.22 1.10 20.00 3.26 1.13 20.80 3.30 1.16 21.60 3.34 1.19 22.40 3.38 1.21 23.20 3.41 1.24 24.00 3.44 1.26 24.80 3.44 1.26 25.60 3.44 1.26 26.40 3.44 1.26 27.20 3.44 1.26 28.00 3.44 1.26 28.80 3.44 1.26 29.60 3.44 1.26 30.40 3.44 1.26 31.20 3.44 1.26 32.00 3.44 1.26 32.80 3.44 1.26 33.60 3.44 1.26 34.40 3.44 1.26 35.20 3.44 1.26 36.00 3.44 1.26 36.80 3.44 1.26 37.60 3.44 1.26 38.40 3.44 1.26 39.20 3.44 1.26 40.00 3.44 1.26 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 0.02 0.21 0.11 0.06 0.04 0.03 0.03 0.02 0.02 0.02 0.02 0.02 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 Time Precip. Excess (hours) (inches)

04 0.03 0.03 0.02 0.02 0.02 0.02 0.02 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 Time Precip. Excess (hours) (inches) (inches) 40.80 3.44 1.26 41.60 3.44 1.26 42.40 3.44 1.26 43.20 3.44 1.26 44.00 3.44 1.26 44.80 3.44 1.26 45.60 3.44 1.26 46.40 3.44 1.26 47.20 3.44 1.26 48.00 3.44 1.26 48.80 3.44 1.26 49.60 3.44 1.26 50.40 3.44 1.26 51.20 3.44 1.26 52.00 3.44 1.26 52.80 3.44 1.26 53.60 3.44 1.26 54.40 3.44 1.26 55.20 3.44 1.26 56.00 3.44 1.26 56.80 3.44 1.26 57.60 3.44 1.26 58.40 3.44 1.26 59.20 3.44 1.26 60.00 3.44 1.26 60.80 3.44 1.26 61.60 3.44 1.26 62.40 3.44 1.26 63.20 3.44 1.26 64.00 3.44 1.26 64.80 3.44 1.26 65.60 3.44 1.26 66.40 3.44 1.26 67.20 3.44 1.26 68.00 3.44 1.26 68.80 3.44 1.26 69.60 3.44 1.26 70.40 3.44 1.26 71.20 3.44 1.26 72.00 3.44 1.26 72.80 3.44 1.26 73.60 3.44 1.26 74.40 3.44 1.26 75.20 3.44 1.26 76.00 3.44 1.26 76.80 3.44 1.26 77.60 3.44 1.26 78.40 3.44 1.26 79.20 3.44 1.26 80.00 3.44 1.26 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 29 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 51S: Basin 10 - Imp Runoff = 3.77 cfs @ 12.18 hrs, Volume= Routed to Pond 41P : Basin 10 15,986 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) 19,602 35,284 4,937 59,823 59,823 Tc (min) 9.0 1.0 0.7 10.7 CN 98 98 98 98 Description Paved parking, HSG C Roofs, HSG C Paved parking, HSG D Weighted Average 100.00% Impervious Area Length (feet) 59 Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 0.11 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 210 0.0480 3.53 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 110 2.50 Direct Entry, Pipe Flow (C-D) 379 Total Subcatchment 51S: Basin 10 - Imp Hydrograph 4 Flow (cfs) 3 2 Runoff 3.77 cfs NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=59,823 sf Runoff Volume=15,986 cf Runoff Depth=3.21" Flow Length=379' Tc=10.7 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 30 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 51S: Basin 10 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.03 0.00 1.60 0.06 0.00 2.40 0.10 0.01 3.20 0.14 0.03 4.00 0.18 0.06 4.80 0.22 0.09 5.60 0.27 0.12 6.40 0.32 0.16 7.20 0.38 0.21 8.00 0.45 0.27 8.80 0.52 0.34 9.60 0.62 0.43 10.40 0.75 0.55 11.20 0.96 0.75 12.00 1.65 1.43 12.80 2.48 2.25 13.60 2.69 2.46 14.40 2.82 2.59 15.20 2.92 2.68 16.00 2.99 2.76 16.80 3.06 2.83 17.60 3.12 2.89 18.40 3.17 2.94 19.20 3.22 2.98 20.00 3.26 3.03 20.80 3.30 3.07 21.60 3.34 3.11 22.40 3.38 3.14 23.20 3.41 3.18 24.00 3.44 3.21 24.80 3.44 3.21 25.60 3.44 3.21 26.40 3.44 3.21 27.20 3.44 3.21 28.00 3.44 3.21 28.80 3.44 3.21 29.60 3.44 3.21 30.40 3.44 3.21 31.20 3.44 3.21 32.00 3.44 3.21 32.80 3.44 3.21 33.60 3.44 3.21 34.40 3.44 3.21 35.20 3.44 3.21 36.00 3.44 3.21 36.80 3.44 3.21 37.60 3.44 3.21 38.40 3.44 3.21 39.20 3.44 3.21 40.00 3.44 3.21 Runoff (cfs) 0.00 0.00 0.01 0.02 0.04 0.05 0.05 0.06 0.07 0.09 0.11 0.13 0.17 0.23 0.42 1.79 0.61 0.29 0.21 0.15 0.13 0.11 0.10 0.08 0.08 0.07 0.07 0.07 0.06 0.06 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)

21 0.15 0.13 0.11 0.10 0.08 0.08 0.07 0.07 0.07 0.06 0.06 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 3.44 3.21 41.60 3.44 3.21 42.40 3.44 3.21 43.20 3.44 3.21 44.00 3.44 3.21 44.80 3.44 3.21 45.60 3.44 3.21 46.40 3.44 3.21 47.20 3.44 3.21 48.00 3.44 3.21 48.80 3.44 3.21 49.60 3.44 3.21 50.40 3.44 3.21 51.20 3.44 3.21 52.00 3.44 3.21 52.80 3.44 3.21 53.60 3.44 3.21 54.40 3.44 3.21 55.20 3.44 3.21 56.00 3.44 3.21 56.80 3.44 3.21 57.60 3.44 3.21 58.40 3.44 3.21 59.20 3.44 3.21 60.00 3.44 3.21 60.80 3.44 3.21 61.60 3.44 3.21 62.40 3.44 3.21 63.20 3.44 3.21 64.00 3.44 3.21 64.80 3.44 3.21 65.60 3.44 3.21 66.40 3.44 3.21 67.20 3.44 3.21 68.00 3.44 3.21 68.80 3.44 3.21 69.60 3.44 3.21 70.40 3.44 3.21 71.20 3.44 3.21 72.00 3.44 3.21 72.80 3.44 3.21 73.60 3.44 3.21 74.40 3.44 3.21 75.20 3.44 3.21 76.00 3.44 3.21 76.80 3.44 3.21 77.60 3.44 3.21 78.40 3.44 3.21 79.20 3.44 3.21 80.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 31 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 52S: Basin 10 - Perv Runoff = 1.03 cfs @ 12.19 hrs, Volume= Routed to Pond 41P : Basin 10 3,908 cf, Depth= 1.26" 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) 7,626 29,609 37,235 37,235 Tc (min) 9.0 1.0 0.7 10.7 CN 80 74 75 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious Area Length (feet) 59 Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 0.11 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" Using McCuen-Spiess flow length 210 0.0480 3.53 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 110 2.50 Direct Entry, Pipe Flow (C-D) 379 Total Subcatchment 52S: Basin 10 - Perv Hydrograph Runoff 1.03 cfs Flow (cfs) 1 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=37,235 sf Runoff Volume=3,908 cf Runoff Depth=1.26" Flow Length=379' Tc=10.7 min CN=75 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 32 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 52S: Basin 10 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.03 0.00 1.60 0.06 0.00 2.40 0.10 0.00 3.20 0.14 0.00 4.00 0.18 0.00 4.80 0.22 0.00 5.60 0.27 0.00 6.40 0.32 0.00 7.20 0.38 0.00 8.00 0.45 0.00 8.80 0.52 0.00 9.60 0.62 0.00 10.40 0.75 0.00 11.20 0.96 0.02 12.00 1.65 0.22 12.80 2.48 0.64 13.60 2.69 0.76 14.40 2.82 0.84 15.20 2.92 0.91 16.00 2.99 0.96 16.80 3.06 1.00 17.60 3.12 1.04 18.40 3.17 1.07 19.20 3.22 1.10 20.00 3.26 1.13 20.80 3.30 1.16 21.60 3.34 1.19 22.40 3.38 1.21 23.20 3.41 1.24 24.00 3.44 1.26 24.80 3.44 1.26 25.60 3.44 1.26 26.40 3.44 1.26 27.20 3.44 1.26 28.00 3.44 1.26 28.80 3.44 1.26 29.60 3.44 1.26 30.40 3.44 1.26 31.20 3.44 1.26 32.00 3.44 1.26 32.80 3.44 1.26 33.60 3.44 1.26 34.40 3.44 1.26 35.20 3.44 1.26 36.00 3.44 1.26 36.80 3.44 1.26 37.60 3.44 1.26 38.40 3.44 1.26 39.20 3.44 1.26 40.00 3.44 1.26 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 0.04 0.37 0.22 0.11 0.08 0.06 0.05 0.05 0.04 0.03 0.03 0.03 0.03 0.03 0.03 0.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)

08 0.06 0.05 0.05 0.04 0.03 0.03 0.03 0.03 0.03 0.03 0.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 3.44 1.26 41.60 3.44 1.26 42.40 3.44 1.26 43.20 3.44 1.26 44.00 3.44 1.26 44.80 3.44 1.26 45.60 3.44 1.26 46.40 3.44 1.26 47.20 3.44 1.26 48.00 3.44 1.26 48.80 3.44 1.26 49.60 3.44 1.26 50.40 3.44 1.26 51.20 3.44 1.26 52.00 3.44 1.26 52.80 3.44 1.26 53.60 3.44 1.26 54.40 3.44 1.26 55.20 3.44 1.26 56.00 3.44 1.26 56.80 3.44 1.26 57.60 3.44 1.26 58.40 3.44 1.26 59.20 3.44 1.26 60.00 3.44 1.26 60.80 3.44 1.26 61.60 3.44 1.26 62.40 3.44 1.26 63.20 3.44 1.26 64.00 3.44 1.26 64.80 3.44 1.26 65.60 3.44 1.26 66.40 3.44 1.26 67.20 3.44 1.26 68.00 3.44 1.26 68.80 3.44 1.26 69.60 3.44 1.26 70.40 3.44 1.26 71.20 3.44 1.26 72.00 3.44 1.26 72.80 3.44 1.26 73.60 3.44 1.26 74.40 3.44 1.26 75.20 3.44 1.26 76.00 3.44 1.26 76.80 3.44 1.26 77.60 3.44 1.26 78.40 3.44 1.26 79.20 3.44 1.26 80.00 3.44 1.26 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 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 33 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 53S: Basin 9 - Imp Runoff = 1.13 cfs @ 12.14 hrs, Volume= Routed to Pond 42P : Basin 9 4,311 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) 6,889 9,244 16,133 16,133 Tc (min) 7.2 Length (feet) 100 0.2 40 7.4 140 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) 0.1000 0.23 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.0750 4.41 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps Total Subcatchment 53S: Basin 9 - Imp Hydrograph Runoff 1.13 cfs Flow (cfs) 1 0 NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=16,133 sf Runoff Volume=4,311 cf Runoff Depth=3.21" Flow Length=140' Tc=7.4 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)