2023 06 Drainage Statement

transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Natural Resources Web Soil Survey 10/29/2021 Conservation Service National Cooperative Soil Survey Page 3 of 4

Hydrologic Soil Group—Essex County, New Jersey Rating Options Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Natural Resources Web Soil Survey 10/29/2021 Conservation Service National Cooperative Soil Survey Page 4 of 4

TIME OF CONCENTRATION (TC) CALCULATIONS

Date: 7/6/2023 Project: Proposed Popeyes & Fast Food Restaurant Project No: 1021-99-025 1904 Main Street, Lake Como, NJ 07719 Calculated By: DG (732) 974-0198 Checked By: MB Worksheet 3: Time of Concentration (T c ) Calculations Land Condition: Existing Drainage Area: Site • Sheet Flow : AB BC Smooth 1. Surface Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dense Grasses Surfaces 2. Manning's Roughness Coefficient, n . . . . . . . . . . . . . . . . . . . . . . 0.24 0.011 3. Flow Length, L { total L ≤ 100 ft } . . . . . . . . . . . . . . . . . . . . . . . 27.0 ft 73.0 ft 4. Two-Year 24-hour Rainfall, p 2 for . . . Essex County . . . . 3.44 in 3.44 in 5. Land Slope, s (ft/ft) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.074 ft/ft 0.041 ft/ft 0.007 (n L ) 0.8 6. Travel Time, T t = . . . . . . . . . . . . . . . . . .0.048 . . . . .hr + 0.011 hr + 0.000 hr = 0.059 hr p 2 0.5 s 0.4 • Shallow Concentrated Flow : CD 7. Surface

0.059 hr p 2 0.5 s 0.4 • Shallow Concentrated Flow : CD 7. Surface Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paved 8. Flow Length, L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96.0 ft 9. Watercourse Slope, s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.047 ft/ft 10. Average velocity, V { see Figure 3.1) . . . . . . . . . . . . . . . . . . . . . . 4.41 ft/s 11. Travel Time, T t = L . . . . . . . . . . . . . . . . . .0.006 . . . . .hr + 0.000 hr + 0.000 hr = 0.006 hr 3600 V • Channel Flow : DE EF 12. Pipe Diameter, D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 in 10 in 13. Cross-Sectional Flow Area, A . . . . . . . . . . . . . . . . . . . . . . . . . 0.087 sf 0.545 sf 14. Wetted Perimeter, p w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 ft 2.6 ft 15. Hydraulic Radius, r = A / p w . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1 ft 0.2 ft 16. Channel Slope, s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.037 ft/ft 0.138 ft/ft 17. Pipe Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PVC PVC 18. Manning's Roughness Coefficient, n . . . . . . . . . . . . . . . . . . . . . 0.010 0.010 1.49 r 2/3 s 1/2 19. Velocity, V = . . . . . . . . . . . . . . . . . . . .5.47 . ft/s 19.45 ft/s

. . . . . . . . . . . . .5.47 . ft/s 19.45 ft/s n 20. Flow Length, L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.0 21.0 21. Travel Time, T t = L . . . . . . . . . . . . . . . . . .0.003 . . . . .hr . . . +. . . 0.000 . . . .+ 0.000 hr . . . . . hr = 0.003 hr 3600 V 22. Watershed or subarea Time of Concentration, T c { add T t in steps 6, 11 and 21 } . . . . . . . . . . . . . . . . . . . . . . . . . 0.068 hr 4.1 min

Date: 7/6/2023 Project: Proposed Popeyes & Sonic Restaurant Project No: 1021-99-025 1904 Main Street, Lake Como, NJ 07719 Calculated By: DG (732) 974-0198 Checked By: MB Worksheet 3: Time of Concentration (T c ) Calculations Land Condition: Proposed Drainage Area: Site • Sheet Flow : AB BC CD Short Grass, Short Grass, 1. Surface Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prairie . Prairie Smooth Surfaces 2. Manning's Roughness Coefficient, n . . . . . . . . . . . . . . . . . . . .0.15 .. 0.15 0.011 3. Flow Length, L { total L ≤ 100 ft } . . . . . . . . . . . . . . . . . . . . .13.0 . . ft 24.0 ft 30.0 ft 4. Two-Year 24-hour Rainfall, p 2 for . . .Essex County. . . . 3.44 in 3.44 in 3.44 in 5. Land Slope, s (ft/ft) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ft/ft 0.126 0.024 ft/ft 0.027 ft/ft 0.007 (n L ) 0.8 6. Travel Time, T t = . . . . . . . . . . . . . . . .0.015 . . . . .hr

. . . . . . .0.015 . . . . .hr .. + 0.047 hr + 0.007 hr = 0.068 hr p 2 0.5 s 0.4 • Shallow Concentrated Flow : 7. Surface Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8. Flow Length, L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9. Watercourse Slope, s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10. Average velocity, V { see Figure 3.1) . . . . . . . . . . . . . . . . . . . . . . 11. Travel Time, T t = L . . . . . . . . . . . . . . . .0.000 . . . . .hr .. + 0.000 hr + 0.000 hr = 0.000 hr 3600 V • Channel Flow : DE EF FG 12. Pipe Diameter, D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 in 12 in 15 in 13. Cross-Sectional Flow Area, A . . . . . . . . . . . . . . . . . . . . . . . 0.785 .. sf 0.785 sf 1.227 sf 14. Wetted Perimeter, p w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 ft 3.1 ft 3.9 ft 15. Hydraulic Radius, r = A / p w . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 . ft 0.3 ft 0.3 ft 16. Channel Slope, s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.027 .. ft/ft 0.081 ft/ft 0.046 ft/ft 17. Pipe Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RCP RCP RCP 18. Manning's Roughness Coefficient, n . . . . . . . . . . . . . . . . . . . 0.013 .. 0.013 0.013 1.49 r 2/3 s 1/2 19. Velocity, V =

ghness Coefficient, n . . . . . . . . . . . . . . . . . . . 0.013 .. 0.013 0.013 1.49 r 2/3 s 1/2 19. Velocity, V = . . . . . . . . . . . . . . . . . .7.47 . . . ft/s 12.95 ft/s 11.32 ft/s n 20. Flow Length, L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.0.... 55.0 39.0 21. Travel Time, T t = L . . . . . . . . . . . . . . . .0.003 . . . . .hr . . .+ . . . 0.001 . . . . . hr . . . .+. . 0.001 hr = 0.006 hr 3600 V 22. Watershed or subarea Time of Concentration, T c { add T t in steps 6, 11 and 21 } . . . . . . . . . . . . . . . . . . . . . . . . . 0.074 hr 4.4 min 1

RUNOFF CURVE NUMBER (CN) CALCULATIONS – EXISTING