Stormwater Management Report Revised as of 01282026 4936 0314 8685 v2

Hydraflow Storm Sewers Extension for Autodesk® Civil 3D® Plan D1 FA Outfall Outfall HEADWALL ROOF cé Project File: INLET.stm Number of lines: 15 Date: 1/29/2026 Storm Sewers v2025,00

Storm Sewer Tabulation Page 1 Station Len = |Drng Area Rnoff | Area x C Te Rain |Total |Cap Wel Pipe Invert Elev HGL Elev |Grnd / Rim Elev Line ID coeff (I) flow full Line To Incr | Total Incr Total [Inlet |Syst Size |Slope |Dn Up. Dn Up. Dn Up pine (ft) (ac) (ac) |(C) (min) |(min) |(inthr) /(cfs) |(cfs) (fs) |(in) —[(%) (ft) (ft) (ft) (ft) (ft) (ft) 1 End | 207 |0.09 |0.97 | 0.99 |0.09 |0.54 |60 |60.3 | 29 | 456.6 | 926.3] 16.72} 72 | 4.78 | 370.30 | 380.20 | 375.85 | 385.75 | 382.22 | 391.30 |A2-A1 2 1 117 10.07 |0.53 | 0.99 |0.07 |0.29 | 6.0 |60.2 | 2.9 | 455.8 | 901.5) 16.69} 72 | 4.53 | 380.20 | 385.50 | 385.75 | 391.05 | 391.30 |395.76 | A3-A2 3 2 159 /0.00 [0.00 | 0.00 |0.00 |0.00 | 60.0 |60.0 | 0.0 | 455.0 | 976.5] 16.66} 72 | 5.31 | 385.50 | 393.95 | 391.05 | 399.50 | 395.76 | 403.50 | HEADWALL-A3 4 2 44 |046 |0.46 | 0.47 /0.22 |0.22 | 6.0 |6.0 9.1 1.97 | 15.68 | 6.21 15 | 5.02 | 393.25 | 395.46 | 393.55 | 396.02 | 395.76 | 399.48 | F1-A3 5 1 43 |0.14 |0.35 | 0.47 |0.07 0.16 | 60 |7.4 8.6 | 1.41 7.16 | 3.94 | 15 | 1.05 | 387.00 | 387.45 | 387.38 | 387.92 | 391.30 | 403.00 |D1-A2 6 5 61 0.21 |0.21 | 0.47 |0.10 |0.10 | 60 |6.0 9.1 |0.90 | 15.62) 4.92 | 15 | 4.98 | 391.00 | 394.04 | 391.20 | 394.41 | 403.00 | 398.80 |D2-D1 7 End | 81 /|0.00 /0.21 | 0.00 |0.00 |0.10 | 6.0 |67 8.8 |0.87 | 19.13) 3.07 | 15 | 7.48 | 378.29 | 384.35 | 378.63 | 384.72 | 382.22 | 390.20 |MHB1-A1 8 7 31/021 /0.21 | 0.47 |0.10 |0.10 | 6.0 |60 9.1 |0.90 | 15.64) 3.82) 15 | 5.00 | 384.45 | 386.00 | 384.72 | 386.37 | 390.20 | 389.00 |B2-B1 9 End| 18 /0.58 |1.43 | 0.99 |0.57 |1.41 |20 |66 8.9 | 12.55 | 26.54] 7.83 | 18 | 5.44 | 378.50 | 379.48 | 379.73 | 380.81 | 382.22 | 383.73 |C1-A1 10 |9 123 |0.00 |0.85 | 0.00 |0.00 |0.84 | 0.0 |63 9.0 |7.56 | 14.41) 643) 15 | 4.24 | 379.60 | 384.82 | 380.81 | 385.91 | 383.73 | 388.13 | C5-C1 1 10 76 |0.08 |0.65 | 0.98 |0.08 |0.64 | 60 |6.0 9.1 5.85 | 14.40 | 5.37 15 | 4.24 | 384.80 | 388.02 | 385.91 | 389.00 | 388.13 | 400.04 | C2-C5 12 | 11 53 |0.00 |0.57 | 0.00 |0.00 |0.56 | 0.0 |23 9.5 |536 | 647] 812) 12 | 2.81 | 394.50 | 395.99 | 395.19 | 396.92 | 400.04 | 400.29 | C3-C2 13 | 12 143 0.57 |0.57 | 0.99 |0.56 |0.56 | 2.0 |2.0 9.5 |536 | 6.03) 7.05 | 12 | 2.44 | 396.00 | 399.49 | 396.92 | 400.42 | 400.29 | 402.49 |C4-C3 14 | 10 68 0.20 |0.20 | 0.99 }0.20 |0.20 | 2.0 |2.0 9.5 |188 | 4.66 | 3.23) 12 | 1.46 | 385.00 | 385.99 |

.5 |536 | 6.03) 7.05 | 12 | 2.44 | 396.00 | 399.49 | 396.92 | 400.42 | 400.29 | 402.49 |C4-C3 14 | 10 68 0.20 |0.20 | 0.99 }0.20 |0.20 | 2.0 |2.0 9.5 |188 | 4.66 | 3.23) 12 | 1.46 | 385.00 | 385.99 | 385.91 | 386.57 | 388.13 | 388.50 | C5-C5 15 | End| 14 |0.10 |0.10 /0.99 0.10 /0.10 | 2.0 {20 9.5 |0.94 | 1.92 | 3.66 8 | 2.14 | 378.00 | 378.30 | 378.46 | 378.76 | 379.77 | 382.00 | Build to inlet Project File: INLET.stm Number of lines: 15 Run Date: 1/29/2026 NOTES: Intensity = 150.20 / (Inlet time + 15.60) “ 0.91; Return period =Yrs. 100 ; c= cir e=ellip b = box Storm Sewers v2025,00

APPENDIX D NRCS SOIL MAPPING DATA

Soil Map—Essex County, New Jersey 74° 16' 40'' W 74° 16' 33'' W 560940 560950 560960 560970 560980 560990 561000 561010 561020 561030 561040 561050 561060 561070 561080 561090 561100 40° 46' 16'' N 40° 46' 16'' N 4513610 4513610 4513600 4513600 4513590 4513590 4513580 4513580 4513570 4513570 4513560

4513570 4513560 4513560 4513550 4513550 4513540 4513540 4513530 4513530 4513520 4513520 4513510 4513510 Soil Map may not be valid at this scale. 40° 46' 12'' N 40° 46' 12'' N 560940 560950 560960 560970 560980 560990 561000 561010 561020

40° 46' 12'' N 560940 560950 560960 560970 560980 560990 561000 561010 561020 561030 561040 561050 561060 561070 561080 561090 561100 74° 16' 40'' W 74° 16' 33'' W Map Scale: 1:804 if printed on A landscape (11" x 8.5") sheet. Meters N 0 10 20 40 60 Feet 0 35 70 140 210 Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 18N WGS84 Natural Resources Web Soil Survey 10/10/2025 Conservation Service National Cooperative Soil Survey Page 1 of 3

Soil Map—Essex County, New Jersey MAP LEGEND MAP INFORMATION Area of Interest (AOI) Spoil Area The soil surveys that comprise your AOI were mapped at Area of Interest (AOI) 1:12,000. Stony Spot Soils Warning: Soil Map may not be valid at this scale. Very Stony Spot Soil Map Unit Polygons Wet Spot Enlargement of maps beyond the scale of mapping can cause Soil Map Unit Lines misunderstanding of the detail of mapping and accuracy of soil Other line placement. The maps do not show the small areas of Soil Map Unit Points Special Line Features contrasting soils that could have been shown at a more detailed Special Point Features scale. Blowout Water Features Streams and Canals Please rely on the bar scale on each map sheet for map Borrow Pit measurements. Transportation Clay Spot Source of Map: Natural Resources Conservation Service Rails Closed Depression

of Map: Natural Resources Conservation Service Rails Closed Depression Web Soil Survey URL: Interstate Highways Coordinate System: Web Mercator (EPSG:3857) Gravel Pit US Routes Maps from the Web Soil Survey are based on the Web Mercator Gravelly Spot projection, which preserves direction and shape but distorts Major Roads distance and area. A projection that preserves area, such as the Landfill Local Roads Albers equal-area conic projection, should be used if more Lava Flow accurate calculations of distance or area are required. Background Marsh or swamp Aerial Photography This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Mine or Quarry Soil Survey Area: Essex County, New Jersey Miscellaneous Water Survey Area Data: Version 21, Aug 28, 2025 Perennial Water Soil map units are labeled (as space allows) for map scales Rock Outcrop 1:50,000 or

its are labeled (as space allows) for map scales Rock Outcrop 1:50,000 or larger. Saline Spot Date(s) aerial images were photographed: Oct 10, 2022—Oct 16, 2022 Sandy Spot The orthophoto or other base map on which the soil lines were Severely Eroded Spot compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor Sinkhole shifting of map unit boundaries may be evident. Slide or Slip Sodic Spot Natural Resources Web Soil Survey 10/10/2025 Conservation Service National Cooperative Soil Survey Page 2 of 3