J_2024 05 09_West Orange Stormwater Management Plan

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA E 144507 Page 10 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 4,845 2,044 8,385 0 0 sf sf sf sf sf 0.111 0.047 0.192 0.000 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 15,274 sf 15,274 sf 0.35 0.35 ac ac Composite CN = 88 of 19 SJM MJB Final X References Time of Concentration: Gravel Sheet Flow L= 100 ft 0.30% % S= n= 0.100 Gravel Sheet Flow Shallow Concentrated Flow L= S= 75 ft 0.55% % Tc = 14.46 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Unpaved min 0.37 1.42 0.65 1.14 2.14 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.015 ac-ft V(25) = 0.149 ac-ft Current: Future: V(2) = 0.067 ac-ft V(2) = V(10) = 0.119 ac-ft V(10) = V(100) = 0.228 ac-ft V(100) = 0.84 1.44 2.83 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.084 0.147 0.295 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA F 144507 Page 11 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 0 1,223 0 2,547 0 sf sf sf sf sf 0.000 0.028 0.000 0.058 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 3,770 3,770 sf sf 0.09 0.09 ac ac Composite CN = 75 of 19 SJM MJB Final X References Time of Concentration: Sheet Flow 66 L= ft 22.64% % S= n= 0.400 Tc = 5.17 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Woods: Light underbrush min 0.02 0.38 0.13 0.29 0.62 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.001 ac-ft V(25) = 0.026 ac-ft Current: Future: V(2) = 0.009 ac-ft V(2) = V(10) = 0.020 ac-ft V(10) = V(100) = 0.044 ac-ft V(100) = 0.18 0.38 0.84 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.013 0.026 0.060 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA G 144507 Page 12 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 4,875 2,793 9,215 0 0 sf sf sf sf sf 0.112 0.064 0.212 0.000 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 16,882 sf 16,882 sf 0.39 0.39 ac ac Composite CN = 88 of 19 SJM MJB Final X References Time of Concentration: Gravel Sheet Flow L= 100 ft 0.10% % S= n= 0.100 Gravel Sheet Flow Shallow Concentrated Flow L= S= 75 ft 1.21% % Tc = 21.52 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Unpaved min 0.31 1.30 0.59 1.05 1.97 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.016 ac-ft V(25) = 0.163 ac-ft Current: Future: V(2) = 0.073 ac-ft V(2) = V(10) = 0.130 ac-ft V(10) = V(100) = 0.250 ac-ft V(100) = 0.77 1.34 2.63 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.091 0.160 0.324 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA H 144507 Page 13 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 0 440 0 9,855 0 sf sf sf sf sf 0.000 0.010 0.000 0.226 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 10,295 sf 10,295 sf 0.24 0.24 ac ac Composite CN = 73 of 19 SJM MJB Final X References Time of Concentration: Sheet Flow 82 L= ft 17.36% % S= n= 0.400 Tc = 6.84 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Woods: Light underbrush min 0.03 0.92 0.30 0.69 1.54 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.001 ac-ft V(25) = 0.068 ac-ft Current: Future: V(2) = 0.023 ac-ft V(2) = V(10) = 0.051 ac-ft V(10) = V(100) = 0.117 ac-ft V(100) = 0.43 0.92 2.13 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.031 0.067 0.160 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA I 144507 Page 14 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 2,904 1,737 5,866 0 0 sf sf sf sf sf 0.067 0.040 0.135 0.000 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 10,506 sf 10,506 sf 0.24 0.24 ac ac Composite CN = 88 of 19 SJM MJB Final X References Time of Concentration: Gravel Sheet Flow L= 100 ft 2.37% % S= n= 0.100 Gravel Sheet Flow Shallow Concentrated Flow L= S= 20 ft 3.20% % Tc = 5.98 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Unpaved min 0.33 1.30 0.59 1.04 1.96 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.010 ac-ft V(25) = 0.101 ac-ft Current: Future: V(2) = 0.045 ac-ft V(2) = V(10) = 0.081 ac-ft V(10) = V(100) = 0.155 ac-ft V(100) = 0.75 1.30 2.55 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.056 0.100 0.202 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA J 144507 Page 15 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 5,294 3,682 4,800 0 0 sf sf sf sf sf 0.122 0.085 0.110 0.000 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 13,776 sf 13,776 sf 0.32 0.32 ac ac Composite CN = 89 of 19 SJM MJB Final X References Time of Concentration: Gravel Sheet Flow 96 L= ft 3.36% % S= n= 0.100 Tc = 4.94 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Gravel Sheet Flow min 0.50 1.79 0.83 1.44 2.68 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.015 ac-ft V(25) = 0.136 ac-ft Current: Future: V(2) = 0.062 ac-ft V(2) = V(10) = 0.109 ac-ft V(10) = V(100) = 0.207 ac-ft V(100) = 1.05 1.79 3.49 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.077 0.134 0.268 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA K 144507 Page 16 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 1,366 1,122 0 1,936 0 sf sf sf sf sf 0.031 0.026 0.000 0.044 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 4,424 4,424 sf sf 0.10 0.10 ac ac Composite CN = 82 of 19 SJM MJB Final X References Time of Concentration: Woodland Sheet Flow L= 100 ft S= 7.72% % n= 0.400 Woods: Light underbrush Shallow Concentrated Flow L= S= 139 ft 4.24% % Tc = 13.34 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Woodland min 0.08 0.37 0.16 0.29 0.59 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.003 ac-ft V(25) = 0.038 ac-ft Current: Future: V(2) = 0.016 ac-ft V(2) = V(10) = 0.030 ac-ft V(10) = V(100) = 0.059 ac-ft V(100) = 0.20 0.38 0.79 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.020 0.037 0.078 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA L 144507 Page 17 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 0 927 232 6,837 0 sf sf sf sf sf 0.000 0.021 0.005 0.157 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 7,996 7,996 sf sf 0.18 0.18 ac ac Composite CN = 74 of 19 SJM MJB Final X References Time of Concentration: Sheet Flow L= 100 ft 10.03% % S= n= 0.400 Woods: Light underbrush Shallow Concentrated Flow L= S= 16 ft 3.39% % Tc = 10.20 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Short Grass Pasture min 0.03 0.63 0.21 0.47 1.06 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.001 ac-ft V(25) = 0.054 ac-ft Current: Future: V(2) = 0.019 ac-ft V(2) = V(10) = 0.041 ac-ft V(10) = V(100) = 0.092 ac-ft V(100) = 0.30 0.64 1.47 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.025 0.053 0.125 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA M 144507 Page 18 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 13,651 0 4,808 0 2,493 sf sf sf sf sf 0.313 0.000 0.110 0.000 0.057 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 20,952 sf 18,459 sf 0.48 0.42 ac ac Composite CN = 95 of 19 SJM MJB Final X References Time of Concentration: Gravel Sheet Flow L= 100 ft 1.60% % S= n= 0.100 Gravel Sheet Flow Gravel Shallow Concentrated Flow L= S= 80 ft 1.60% % Tc = 7.39 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Paved min 0.96 2.35 1.19 1.94 3.42 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.030 ac-ft V(25) = 0.205 ac-ft Current: Future: V(2) = 0.102 ac-ft V(2) = V(10) = 0.168 ac-ft V(10) = V(100) = 0.302 ac-ft V(100) = 1.46 2.37 4.42 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.123 0.202 0.385 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA N 144507 Page 19 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 9,139 18,653 6,647 22,986 0 sf sf sf sf sf 0.210 0.428 0.153 0.528 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 57,424 sf 57,424 sf 1.32 1.32 ac ac Composite CN = 81 of 19 SJM MJB Final X References Time of Concentration: Gravel Sheet Flow L= 100 ft 1.39% % S= n= 0.100 Gravel Sheet Flow Shallow Concentrated Flow L= S= 19 ft 4.80% % Paved Shallow Concentrated Flow L= 28 ft S= 21.78% % Woodland Shallow Concentrated Flow L= 305 ft S= 4.68% % Short Grass Pasture Tc = 10.89 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = min 0.79 5.16 2.06 4.02 8.18 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.031 ac-ft V(25) = 0.469 ac-ft Current: Future: V(2) = 0.188 ac-ft V(2) = V(10) = 0.364 ac-ft V(10) = V(100) = 0.752 ac-ft V(100) = 2.75 5.21 11.03 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.243 0.461 0.998 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx