Revised Stormwater Management Report

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 86 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 21S: Basin 4 - Imp Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.05 0.00 1.60 0.10 0.01 2.40 0.15 0.04 3.20 0.21 0.08 4.00 0.27 0.12 4.80 0.34 0.18 5.60 0.41 0.24 6.40 0.48 0.30 7.20 0.57 0.39 8.00 0.68 0.48 8.80 0.80 0.59 9.60 0.94 0.74 10.40 1.14 0.93 11.20 1.46 1.24 12.00 2.50 2.27 12.80 3.76 3.53 13.60 4.08 3.84 14.40 4.28 4.04 15.20 4.42 4.19 16.00 4.54 4.31 16.80 4.65 4.41 17.60 4.74 4.50 18.40 4.81 4.57 19.20 4.88 4.64 20.00 4.95 4.71 20.80 5.01 4.77 21.60 5.07 4.83 22.40 5.12 4.88 23.20 5.17 4.94 24.00 5.22 4.98 24.80 5.22 4.98 25.60 5.22 4.98 26.40 5.22 4.98 27.20 5.22 4.98 28.00 5.22 4.98 28.80 5.22 4.98 29.60 5.22 4.98 30.40 5.22 4.98 31.20 5.22 4.98 32.00 5.22 4.98 32.80 5.22 4.98 33.60 5.22 4.98 34.40 5.22 4.98 35.20 5.22 4.98 36.00 5.22 4.98 36.80 5.22 4.98 37.60 5.22 4.98 38.40 5.22 4.98 39.20 5.22 4.98 40.00 5.22 4.98 Runoff (cfs) 0.00 0.00 0.03 0.05 0.06 0.07 0.08 0.09 0.10 0.13 0.15 0.17 0.23 0.31 0.60 3.28 0.71 0.34 0.26 0.18 0.16 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 0.18 0.16 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 5.22 4.98 41.60 5.22 4.98 42.40 5.22 4.98 43.20 5.22 4.98 44.00 5.22 4.98 44.80 5.22 4.98 45.60 5.22 4.98 46.40 5.22 4.98 47.20 5.22 4.98 48.00 5.22 4.98 48.80 5.22 4.98 49.60 5.22 4.98 50.40 5.22 4.98 51.20 5.22 4.98 52.00 5.22 4.98 52.80 5.22 4.98 53.60 5.22 4.98 54.40 5.22 4.98 55.20 5.22 4.98 56.00 5.22 4.98 56.80 5.22 4.98 57.60 5.22 4.98 58.40 5.22 4.98 59.20 5.22 4.98 60.00 5.22 4.98 60.80 5.22 4.98 61.60 5.22 4.98 62.40 5.22 4.98 63.20 5.22 4.98 64.00 5.22 4.98 64.80 5.22 4.98 65.60 5.22 4.98 66.40 5.22 4.98 67.20 5.22 4.98 68.00 5.22 4.98 68.80 5.22 4.98 69.60 5.22 4.98 70.40 5.22 4.98 71.20 5.22 4.98 72.00 5.22 4.98 72.80 5.22 4.98 73.60 5.22 4.98 74.40 5.22 4.98 75.20 5.22 4.98 76.00 5.22 4.98 76.80 5.22 4.98 77.60 5.22 4.98 78.40 5.22 4.98 79.20 5.22 4.98 80.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 87 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 24S: Basin 4 - Perv Runoff = 0.52 cfs @ 12.12 hrs, Volume= Routed to Pond 22P : Basin 4 1,594 cf, Depth= 2.54" 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 10-Year Rainfall=5.22" Area (sf) 7,526 7,526 Tc (min) 0.9 Length (feet) 70 4.6 5.5 685 755 CN 74 Description >75% Grass cover, Good, HSG C 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.33 Sheet Flow, Sheet Flow (A-B) Smooth surfaces n= 0.011 P2= 3.47" 2.50 Direct Entry, Pipe Flow (B-C) Total Subcatchment 24S: Basin 4 - Perv Hydrograph 0.55 0.5 0.45 0.4 Flow (cfs) 0.35 0.3 0.25 0.2 0.15 0.1 Runoff 0.52 cfs NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=7,526 sf Runoff Volume=1,594 cf Runoff Depth=2.54" Flow Length=755' Slope=0.0200 '/' Tc=5.5 min CN=74 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 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 88 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 24S: Basin 4 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.05 0.00 1.60 0.10 0.00 2.40 0.15 0.00 3.20 0.21 0.00 4.00 0.27 0.00 4.80 0.34 0.00 5.60 0.41 0.00 6.40 0.48 0.00 7.20 0.57 0.00 8.00 0.68 0.00 8.80 0.80 0.00 9.60 0.94 0.02 10.40 1.14 0.05 11.20 1.46 0.13 12.00 2.50 0.61 12.80 3.76 1.42 13.60 4.08 1.65 14.40 4.28 1.80 15.20 4.42 1.91 16.00 4.54 2.01 16.80 4.65 2.09 17.60 4.74 2.16 18.40 4.81 2.21 19.20 4.88 2.27 20.00 4.95 2.32 20.80 5.01 2.37 21.60 5.07 2.42 22.40 5.12 2.46 23.20 5.17 2.50 24.00 5.22 2.54 24.80 5.22 2.54 25.60 5.22 2.54 26.40 5.22 2.54 27.20 5.22 2.54 28.00 5.22 2.54 28.80 5.22 2.54 29.60 5.22 2.54 30.40 5.22 2.54 31.20 5.22 2.54 32.00 5.22 2.54 32.80 5.22 2.54 33.60 5.22 2.54 34.40 5.22 2.54 35.20 5.22 2.54 36.00 5.22 2.54 36.80 5.22 2.54 37.60 5.22 2.54 38.40 5.22 2.54 39.20 5.22 2.54 40.00 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 0.01 0.03 0.26 0.08 0.04 0.03 0.02 0.02 0.02 0.01 0.01 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 Time Precip. Excess (hours) (inches)

03 0.02 0.02 0.02 0.01 0.01 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 Time Precip. Excess (hours) (inches) (inches) 40.80 5.22 2.54 41.60 5.22 2.54 42.40 5.22 2.54 43.20 5.22 2.54 44.00 5.22 2.54 44.80 5.22 2.54 45.60 5.22 2.54 46.40 5.22 2.54 47.20 5.22 2.54 48.00 5.22 2.54 48.80 5.22 2.54 49.60 5.22 2.54 50.40 5.22 2.54 51.20 5.22 2.54 52.00 5.22 2.54 52.80 5.22 2.54 53.60 5.22 2.54 54.40 5.22 2.54 55.20 5.22 2.54 56.00 5.22 2.54 56.80 5.22 2.54 57.60 5.22 2.54 58.40 5.22 2.54 59.20 5.22 2.54 60.00 5.22 2.54 60.80 5.22 2.54 61.60 5.22 2.54 62.40 5.22 2.54 63.20 5.22 2.54 64.00 5.22 2.54 64.80 5.22 2.54 65.60 5.22 2.54 66.40 5.22 2.54 67.20 5.22 2.54 68.00 5.22 2.54 68.80 5.22 2.54 69.60 5.22 2.54 70.40 5.22 2.54 71.20 5.22 2.54 72.00 5.22 2.54 72.80 5.22 2.54 73.60 5.22 2.54 74.40 5.22 2.54 75.20 5.22 2.54 76.00 5.22 2.54 76.80 5.22 2.54 77.60 5.22 2.54 78.40 5.22 2.54 79.20 5.22 2.54 80.00 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 89 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 25S: Basin 2 - Perv Runoff = 5.11 cfs @ 12.18 hrs, Volume= Routed to Pond 27P : Basin 2 18,966 cf, Depth= 2.90" 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 10-Year Rainfall=5.22" Area (sf) 47,097 31,398 78,495 78,495 Tc (min) 9.0 1.5 10.5 CN 80 74 78 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious 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 25S: Basin 2 - Perv Hydrograph Runoff 5.11 cfs 5 Flow (cfs) 4 3 2 NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=78,495 sf Runoff Volume=18,966 cf Runoff Depth=2.90" Flow Length=463' Tc=10.5 min CN=78 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 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 90 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment 25S: Basin 2 - Perv Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 0.80 0.05 0.00 1.60 0.10 0.00 2.40 0.15 0.00 3.20 0.21 0.00 4.00 0.27 0.00 4.80 0.34 0.00 5.60 0.41 0.00 6.40 0.48 0.00 7.20 0.57 0.00 8.00 0.68 0.00 8.80 0.80 0.02 9.60 0.94 0.04 10.40 1.14 0.10 11.20 1.46 0.22 12.00 2.50 0.79 12.80 3.76 1.70 13.60 4.08 1.95 14.40 4.28 2.11 15.20 4.42 2.23 16.00 4.54 2.33 16.80 4.65 2.41 17.60 4.74 2.49 18.40 4.81 2.55 19.20 4.88 2.61 20.00 4.95 2.67 20.80 5.01 2.72 21.60 5.07 2.77 22.40 5.12 2.82 23.20 5.17 2.86 24.00 5.22 2.90 24.80 5.22 2.90 25.60 5.22 2.90 26.40 5.22 2.90 27.20 5.22 2.90 28.00 5.22 2.90 28.80 5.22 2.90 29.60 5.22 2.90 30.40 5.22 2.90 31.20 5.22 2.90 32.00 5.22 2.90 32.80 5.22 2.90 33.60 5.22 2.90 34.40 5.22 2.90 35.20 5.22 2.90 36.00 5.22 2.90 36.80 5.22 2.90 37.60 5.22 2.90 38.40 5.22 2.90 39.20 5.22 2.90 40.00 5.22 2.90 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.08 0.14 0.35 2.13 0.94 0.46 0.34 0.24 0.21 0.19 0.16 0.14 0.13 0.12 0.12 0.11 0.10 0.10 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 0.10 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 5.22 2.90 41.60 5.22 2.90 42.40 5.22 2.90 43.20 5.22 2.90 44.00 5.22 2.90 44.80 5.22 2.90 45.60 5.22 2.90 46.40 5.22 2.90 47.20 5.22 2.90 48.00 5.22 2.90 48.80 5.22 2.90 49.60 5.22 2.90 50.40 5.22 2.90 51.20 5.22 2.90 52.00 5.22 2.90 52.80 5.22 2.90 53.60 5.22 2.90 54.40 5.22 2.90 55.20 5.22 2.90 56.00 5.22 2.90 56.80 5.22 2.90 57.60 5.22 2.90 58.40 5.22 2.90 59.20 5.22 2.90 60.00 5.22 2.90 60.80 5.22 2.90 61.60 5.22 2.90 62.40 5.22 2.90 63.20 5.22 2.90 64.00 5.22 2.90 64.80 5.22 2.90 65.60 5.22 2.90 66.40 5.22 2.90 67.20 5.22 2.90 68.00 5.22 2.90 68.80 5.22 2.90 69.60 5.22 2.90 70.40 5.22 2.90 71.20 5.22 2.90 72.00 5.22 2.90 72.80 5.22 2.90 73.60 5.22 2.90 74.40 5.22 2.90 75.20 5.22 2.90 76.00 5.22 2.90 76.80 5.22 2.90 77.60 5.22 2.90 78.40 5.22 2.90 79.20 5.22 2.90 80.00 5.22 2.90 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 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 91 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 28S: Basin 2 - Imp Runoff = 2.92 cfs @ 12.17 hrs, Volume= Routed to Pond 27P : Basin 2 12,529 cf, Depth= 4.98" 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 10-Year Rainfall=5.22" 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 3 Flow (cfs) 2 1 0 2.92 cfs NOAA 24-hr D 10-Year Rainfall=5.22" Runoff Area=30,173 sf Runoff Volume=12,529 cf Runoff Depth=4.98" Flow Length=463' Tc=10.5 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)

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 92 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 0.05 0.00 1.60 0.10 0.01 2.40 0.15 0.04 3.20 0.21 0.08 4.00 0.27 0.12 4.80 0.34 0.18 5.60 0.41 0.24 6.40 0.48 0.30 7.20 0.57 0.39 8.00 0.68 0.48 8.80 0.80 0.59 9.60 0.94 0.74 10.40 1.14 0.93 11.20 1.46 1.24 12.00 2.50 2.27 12.80 3.76 3.53 13.60 4.08 3.84 14.40 4.28 4.04 15.20 4.42 4.19 16.00 4.54 4.31 16.80 4.65 4.41 17.60 4.74 4.50 18.40 4.81 4.57 19.20 4.88 4.64 20.00 4.95 4.71 20.80 5.01 4.77 21.60 5.07 4.83 22.40 5.12 4.88 23.20 5.17 4.94 24.00 5.22 4.98 24.80 5.22 4.98 25.60 5.22 4.98 26.40 5.22 4.98 27.20 5.22 4.98 28.00 5.22 4.98 28.80 5.22 4.98 29.60 5.22 4.98 30.40 5.22 4.98 31.20 5.22 4.98 32.00 5.22 4.98 32.80 5.22 4.98 33.60 5.22 4.98 34.40 5.22 4.98 35.20 5.22 4.98 36.00 5.22 4.98 36.80 5.22 4.98 37.60 5.22 4.98 38.40 5.22 4.98 39.20 5.22 4.98 40.00 5.22 4.98 Runoff (cfs) 0.00 0.00 0.02 0.03 0.04 0.04 0.05 0.05 0.06 0.07 0.09 0.10 0.14 0.18 0.33 1.40 0.46 0.22 0.16 0.11 0.10 0.09 0.07 0.06 0.06 0.06 0.05 0.05 0.05 0.04 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 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)