Stormwater Management Report Feb 2026 resubmissionrcd 2 26 2026

Custom Soil Resource Report The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2

practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 12

Custom Soil Resource Report Essex County, New Jersey URBONB—Urban land, Boonton substratum, 0 to 8 percent slopes Map Unit Setting National map unit symbol: w9cn Elevation: 50 to 500 feet Mean annual precipitation: 30 to 64 inches Mean annual air temperature: 46 to 79 degrees F Frost-free period: 131 to 178 days Farmland classification: Not prime farmland Map Unit Composition Urban land, boonton substratum: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Urban Land, Boonton Substratum Setting Landform: Ground moraines Landform position (three-dimensional): Lower third of mountainflank Down-slope shape: Linear, convex Across-slope shape: Linear Parent material: Surface covered by pavement, concrete, buildings, and other structures underlain by disturbed and natural soil material Typical profile H1 - 0 to 12 inches: material H2 - 12 to 47 inches: silt loam 2CBt1 - 47 to 58 inches: loamy sand 2CBt2 - 58 to 72 inches: loamy sand Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 8s Hydric soil rating: Unranked Minor Components Udorthents, boonton substratum Percent of map unit: 5 percent Landform: Ground moraines 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 Boonton Percent of map unit: 5 percent Landform: Ground moraines Landform position (three-dimensional): Upper third of mountainflank, center third of mountainflank Down-slope shape: Convex Across-slope shape: Linear

sition (three-dimensional): Upper third of mountainflank, center third of mountainflank Down-slope shape: Convex Across-slope shape: Linear 13

Custom Soil Resource Report Hydric soil rating: No USBONB—Urban land, Boonton substratum - Boonton complex, 0 to 8 percent slopes Map Unit Setting National map unit symbol: w9c1 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): Summit 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: 0 to 8 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 14

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 & PROJECTS 2, 10 & 100-YEAR STORM EVENTS

EXISTING 1S 2S EDA #1 - Impervious EDA #1 - Pervious 1L POI #1 Subcat Reach Pond Link Routing Diagram for 2026-02 Proposed Conditions - AJH Prepared by Dynamic Engineering, Printed 2/16/2026 HydroCAD® 10.20-7a s/n 08640 © 2025 HydroCAD Software Solutions LLC