2026 05 Storm Water Management Report rcd 5 6 2026

Custom Soil Resource Report Description of Boonton Setting Landform: Ground moraines Landform position (two-dimensional): Shoulder Landform position (three-dimensional): Upper third of mountainflank, center third of mountainflank Down-slope shape: Convex Across-slope shape: Linear Parent material: Red coarse-loamy till derived from sedimentary rock Typical profile Oe - 0 to 2 inches: moderately decomposed plant material A - 2 to 4 inches: loam Bt - 4 to 28 inches: sandy loam Btx - 28 to 51 inches: sandy loam BC - 51 to 72 inches: sandy loam Properties and qualities Slope: 3 to 8 percent Depth to restrictive feature: 20 to 39 inches to fragipan Drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Very low to low (0.00 to 0.01 in/hr) Depth to water table: About 28 to 59 inches Frequency of flooding: None Frequency of ponding: None Available water supply, 0 to 60 inches: Low (about 3.1 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2s Hydrologic Soil Group: B Ecological site: F144AY037MA - Moist Dense Till Uplands Hydric soil rating: No Minor Components Udorthents, boonton substratum Percent of map unit: 10 percent Landform: Ground moraines Landform position (two-dimensional): Footslope Landform position (three-dimensional): Lower third of mountainflank, upper third of mountainflank, center third of mountainflank Down-slope shape: Convex Across-slope shape: Convex, linear Hydric soil rating: No 15

Custom Soil Resource Report USBONC—Urban land, Boonton substratum - Boonton complex, 8 to 15 percent slopes Map Unit Setting National map unit symbol: w9c2 Elevation: 0 to 520 feet Mean annual precipitation: 30 to 64 inches Mean annual air temperature: 46 to 79 degrees F Frost-free period: 131 to 213 days Farmland classification: Not prime farmland Map Unit Composition Urban land, boonton substratum: 60 percent Boonton and similar soils: 30 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Urban Land, Boonton Substratum Setting Landform position (two-dimensional): Shoulder Landform position (three-dimensional): Talf Down-slope shape: Linear Across-slope shape: Linear Parent material: Asphalt over supraglacial meltout till Typical profile M - 0 to 12 inches: material 2^C - 12 to 47 inches: gravelly sandy loam 3CBt1 - 47 to 58 inches: loamy sand 3CBt2 - 58 to 72 inches: loamy sand Properties and qualities Slope: 8 to 15 percent Depth to restrictive feature: 0 inches to manufactured layer Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): Very low (0.00 to 0.00 in/hr) Calcium carbonate, maximum content: 10 percent Available water supply, 0 to 60 inches: Very low (about 0.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 8s Hydric soil rating: Unranked 16

Custom Soil Resource Report Description of Boonton Setting Landform: Ground moraines Landform position (two-dimensional): Shoulder Landform position (three-dimensional): Upper third of mountainflank, center third of mountainflank Down-slope shape: Convex Across-slope shape: Linear Parent material: Red coarse-loamy till derived from sedimentary rock Typical profile Oe - 0 to 2 inches: moderately decomposed plant material A - 2 to 4 inches: loam Bt - 4 to 28 inches: sandy loam Btx - 28 to 51 inches: sandy loam BC - 51 to 72 inches: sandy loam Properties and qualities Slope: 8 to 15 percent Depth to restrictive feature: 20 to 39 inches to fragipan Drainage class: Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat): Very low to low (0.00 to 0.01 in/hr) Depth to water table: About 28 to 59 inches Frequency of flooding: None Frequency of ponding: None Available water supply, 0 to 60 inches: Low (about 3.1 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3e Hydrologic Soil Group: B Ecological site: F144AY037MA - Moist Dense Till Uplands Hydric soil rating: No Minor Components Udorthents, boonton substratum Percent of map unit: 10 percent Landform: Ground moraines Landform position (two-dimensional): Backslope Landform position (three-dimensional): Lower third of mountainflank, upper third of mountainflank, center third of mountainflank Down-slope shape: Convex Across-slope shape: Linear Hydric soil rating: No 17

HYDROGRAPH SUMMARY REPORTS – EXISTING AND PROPOSED CONDITIONS CURRENT & PROJECTED 2, 10 & 100-YEAR STORM EVENTS

2026-04 Proposed & Existing Conditions Prepared by Dynamic Engineering Printed 5/5/2026 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC Page 2 Rainfall Events Listing (selected events) Event# Event Storm Type Curve Mode Duration B/B Depth AMC P2 Name (hours) (inches) (inches) 1 2-Year-Current NOAA 24-hr D Default 24.00 1 3.47 2 3.47 2 2-Year-Projected NOAA 24-hr D Default 24.00 1 4.09 2 4.09 3 10-Year-Current NOAA 24-hr D Default 24.00 1 5.38 2 3.47 4 10-Year-Projected NOAA 24-hr D Default 24.00 1 6.37 2 4.09 5

ault 24.00 1 6.37 2 4.09 5 100-Year-Current NOAA 24-hr D Default 24.00 1 9.18 2 3.47 6 100-Year-Projected NOAA 24-hr D Default 24.00 1 11.52 2 4.09 EXISTING 1S 2S 3S 4S 5S 6S EDA #1 - Impervious EDA #1 - Pervious EDA #2 - Impervious EDA #2 - Pervious EDA #3 - Impervious EDA #2 - Pervious 1L 2L 3L POI #1 POI #2 POI #3 Subcat Reach Pond Link Routing Diagram for 2026-04 Proposed & Existing Conditions Prepared by Dynamic Engineering, Printed 5/5/2026 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC

2026-04 Proposed & Existing Conditi NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" 2026-04 Proposed & Existing Conditi NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" Prepared by Dynamic Engineering Printed 5/5/2026 Prepared by Dynamic Engineering Printed 5/5/2026 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC Page 3 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC Page 4 Summary for Subcatchment 1S: EDA #1 - Impervious Summary for Subcatchment 2S: EDA #1 - Pervious Runoff = 1.36 cfs @ 12.10 hrs, Volume= 0.102 af, Depth= 3.24" Runoff = 0.09 cfs @ 12.13 hrs, Volume= 0.007 af, Depth= 0.56" Routed to Link 1L : POI #1 Routed to Link 1L : POI #1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.001 hrs Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.001 hrs NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" Area (ac) CN Description Area (ac) CN Description 0.377 98 Paved parking, HSG B 0.157 61 >75% Grass cover, Good, HSG B 0.377 100.00% Impervious Area

0.157 61 >75% Grass cover, Good, HSG B 0.377 100.00% Impervious Area 0.157 100.00% Pervious Area Tc Length Slope Velocity Capacity Description Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) (min) (feet) (ft/ft) (ft/sec) (cfs) 1.5 100 0.0100 1.09 Sheet Flow, A-B 4.0 34 0.0500 0.14 Sheet Flow, A-B Smooth surfaces n= 0.011 P2= 3.47" Grass: Dense n= 0.240 P2= 3.47" 0.2 119 0.0400 10.53 12.92 Pipe Channel, B-C 0.5 124 0.0410 4.11 Shallow Concentrated Flow, B-C 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' Paved Kv= 20.3 fps n= 0.013 Corrugated PE, smooth interior 0.1 13 0.0030 2.69 2.11 Pipe Channel, C-D 1.7 219 Total 12.0" Round Area= 0.8 sf Perim= 3.1' r= 0.25' n= 0.012 Concrete pipe, finished Subcatchment 1S: EDA #1 - Impervious 0.2 96 0.0144 6.84 8.40 Pipe Channel, D-E

chment 1S: EDA #1 - Impervious 0.2 96 0.0144 6.84 8.40 Pipe Channel, D-E 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' Hydrograph n= 0.012 Concrete pipe, finished 4.8 267 Total Runoff 1.36 cfs NOAA 24-hr D Subcatchment 2S: EDA #1 - Pervious 2-Year-Current Rainfall=3.47" Hydrograph P2=3.47" 0.095 Runoff Runoff Area=0.377 ac 0.09 0.09 cfs 1 Runoff Volume=0.102 af 0.085 NOAA 24-hr D Flow (cfs)

085 NOAA 24-hr D Flow (cfs) Runoff Depth=3.24" 0.08 2-Year-Current Rainfall=3.47" 0.075 Flow Length=219' 0.07 P2=3.47" Tc=1.7 min 0.065 Runoff Area=0.157 ac 0.06 Runoff Volume=0.007 af CN=98 Flow (cfs) 0.055 Runoff Depth=0.56"