Drainage Report

Basin 2-5 2yr w/ exfiltration Proposed Basin 2-5 R5 infil NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 2 Summary for Pond 39P: pond 2-5 Inflow Area = 1.650 ac, Inflow Depth = 3.21" for 2-Year event Inflow = 4.60 cfs @ 12.17 hrs, Volume= 0.441 af Outflow = 0.17 cfs @ 15.57 hrs, Volume= 0.441 af, Atten= 96%, Lag= 203.9 min Discarded = 0.17 cfs @ 15.57 hrs, Volume= 0.441 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 541.46' @ 15.57 hrs Surf.Area= 11,558 sf Storage= 11,150 cf Plug-Flow detention time= 654.2 min calculated for 0.441 af (100% of inflow) Center-of-Mass det. time= 654.7 min ( 1,415.1 - 760.4 ) Volume Invert Avail.Storage Storage Description #1 540.50' 40,453 cf 540 (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 540.50 11,558 0 0 544.00 11,558 40,453 40,453 Device Routing Invert Outlet Devices #1 Discarded 540.50' 0.450 in/hr Exfiltration over Horizontal area Conductivity to Groundwater Elevation = 538.00' #2 Primary 541.50' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.17 cfs @ 15.57 hrs HW=541.46' (Free Discharge) 1=Exfiltration ( Controls 0.17 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=540.50' (Free Discharge) 2=Orifice/Grate ( Controls 0.00 cfs)

Basin 2-5 2yr w/ exfiltration Proposed Basin 2-5 R5 infil NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 3 Pond 39P: pond 2-5 Hydrograph Inflow 4.60 cfs Outflow 5 Inflow Area=1.650 ac Discarded Primary Peak Elev=541.46' 4 Storage=11,150 cf 3 Flow (cfs) 2 1 0.17 cfs 0.17 cfs 0.00 cfs 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)

Basin 2-6 w/ exfiltration Proposed Basin 2-6 R5 infil Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 1 Project Notes Rainfall events imported from "NRCS-Rain.txt" for 6606 NJ Essex-D

Basin 2-6 w/ exfiltration Proposed Basin 2-6 R5 infil NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 2 Summary for Pond 37P: Pond 2-6 Inflow Area = 1.842 ac, Inflow Depth = 3.21" for 2-Year event Inflow = 5.13 cfs @ 12.17 hrs, Volume= 0.492 af Outflow = 0.17 cfs @ 16.26 hrs, Volume= 0.492 af, Atten= 97%, Lag= 245.3 min Discarded = 0.17 cfs @ 16.26 hrs, Volume= 0.492 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 541.71' @ 16.26 hrs Surf.Area= 10,782 sf Storage= 13,026 cf Plug-Flow detention time= 779.5 min calculated for 0.492 af (100% of inflow) Center-of-Mass det. time= 780.1 min ( 1,540.5 - 760.4 ) Volume Invert Avail.Storage Storage Description #1 540.50' 37,737 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 540.50 10,782 0 0 544.00 10,782 37,737 37,737 Device Routing Invert Outlet Devices #1 Discarded 540.50' 0.450 in/hr Exfiltration over Horizontal area Conductivity to Groundwater Elevation = 538.00' #2 Primary 541.80' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Discarded OutFlow Max=0.17 cfs @ 16.26 hrs HW=541.71' (Free Discharge) 1=Exfiltration ( Controls 0.17 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=540.50' (Free Discharge) 2=Orifice/Grate ( Controls 0.00 cfs)

Basin 2-6 w/ exfiltration Proposed Basin 2-6 R5 infil NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 3 Pond 37P: Pond 2-6 Hydrograph Inflow 5.13 cfs Outflow Inflow Area=1.842 ac Discarded Primary 5 Peak Elev=541.71' Storage=13,026 cf 4 Flow (cfs) 3 2 1 0.17 cfs 0.17 cfs 0.00 cfs 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)

35P 34S Basin 3 Basin 3 Subcat Reach Pond Link Routing Diagram for Proposed basin 3 R3 Prepared by Anderson Consulting Services, Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC

Basin 3 Proposed basin 3 R3 Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 2 Project Notes Rainfall events imported from "NRCS-Rain.txt" for 6606 NJ Essex-D

Basin 3 Proposed basin 3 R3 Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 3 Area Listing (selected nodes) Area CN Description (acres) (subcatchment-numbers) 1.447 74 >75% Grass cover, Good, HSG C (34S) 0.744 98 Paved parking, HSG C (34S) 2.191 82 TOTAL AREA

Basin 3 Proposed basin 3 R3 Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 4 Soil Listing (selected nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 2.191 HSG C 34S 0.000 HSG D 0.000 Other 2.191 TOTAL AREA

Basin 3 Proposed basin 3 R3 Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 5 Ground Covers (selected nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 1.447 0.000 0.000 1.447 >75% Grass cover, Good 34S 0.000 0.000 0.744 0.000 0.000 0.744 Paved parking 34S 0.000 0.000 2.191 0.000 0.000 2.191 TOTAL AREA