2026 02 12 Crestmont CC and Eagle Rock Ave Stormwater Management Report

= = = = = = APPENDIX E TABLE OF CONTENTS WATER QUALITY CALCULATIONS REQUIRED TSS REMOVAL CALCULATIONS PROPOSED TSS REMOVAL CALCULATIONS NJDEP WATER QUALITY DESIGN STORM ROUTINGS SSBB-1 SSBB-2 PAPS-1 SUMMARY SMALL-SCALE BIORETENTION BASIN DESIGN SUMMARY POROUS ASPHALT PAVEMENT DESIGN CALCULATIONS

WATER QUALITY CALCULATIONS

REQUIRED TSS REMOVAL CALCULATIONS

CRESTMONT COUNTRY CLUB EAGLE ROCK AVE IMPROVEMENTS LANGAN PROJECT #101049802 REQUIRED TSS REMOVAL RATE CALCULATIONS CRESTMONT COUNTRY CLUB & EAGLE ROCK AVE IMPROVEMENTS LANGAN PROJECT #101049802 Existing Motor Existing Motor Existing Non-Motor Existing Non-Motor Vehicle Surface to Point of Vehicle Surface to Vehicle Surface to Vehicle Surface to Proposed Motor Analysis Proposed Motor Proposed Motor Proposed Motor Vehicle Surface Vehicle Surface (SF) Vehicle Surface (SF) Vehicle Surface (AC) (AC) POA-1 & POA-2 27,536 0.63 37,125 0.85 Required TSS Removal Rate = (0.63*0.50) + (0.85*0.80) 1.48 = 67.2% \\langan.com\data\PAR\data8\101049801\Project Data\_Discipline\Site Civil\Stormwater\Eagle Rock WQ Calcs

PROPOSED TSS REMOVAL CALCULATIONS

CRESTMONT COUNTRY CLUB EAGLE ROCK AVE IMPROVEMENTS LANGAN PROJECT #101049802 PROPOSED TSS REMOVAL RATE CALCULATIONS FLOWING TO PACKANACK BROOK CRESTMONT COUNTRY CLUB & EAGLE ROCK AVE IMPROVEMENTS LANGAN PROJECT #101049802 Proposed 80% Proposed 80% Proposed 90% Proposed 90% Point of No Treatment No Treatment TSS Removal TSS Removal TSS Removal TSS Removal Analysis (SF) (AC) Rate (SF) Rate (AC) Rate (SF) Rate (AC) POA-1 & POA-2 60,650 1.39 20,347 0.47 17,156 0.39 Proposed TSS Removal Rate = (1.39*0.8) + (0.47*0.90) + (0.39*0) 2.25 = 68.2% \\langan.com\data\PAR\data8\101049801\Project Data\_Discipline\Site Civil\Stormwater\Eagle Rock WQ Calcs

= = = = = = NJDEP WATER QUALITY DESIGN STORM ROUTINGS

SSBB-1

Hydrograph Report File: Eagle Rock Proposed (Future).hys Hydrology Studio v 3.0.0.39 10-21-2025 PR-1A Routing Hyd. No. 11 Hydrograph Type = Pond Route Peak Flow = 0.000 cfs Storm Frequency = 2-yr Time to Peak = 61 min Time Interval = 1 min Hydrograph Volume = 0.001 cuft Inflow Hydrograph = 10 - PR-1A Total Max. Elevation = 534.52 ft Pond Name = SSBB-1 Max. Storage = 2,487 cuft Pond Routing by Storage Indication Method Center of mass detention time = 2.59 hrs Qp = 0.000 cfs 3 2 1 0 -1 0 10 20 30 40 50 60 70 80 Time (min) Req'd Stor PR-1A Total PR-1A Routing

Pond Report File: Eagle Rock Proposed (Future).hys Hydrology Studio v 3.0.0.39 10-21-2025 SSBB-1 Stage-Storage User Defined Contours Stage / Storage Table Description Input Stage Elevation Contour Area Incr. Storage Total Storage (ft) (ft) (sqft) (cuft) (cuft) Bottom Elevation, ft 534.00 0.00 534.00 4,713 0.000 0.000 Voids (%) 100.00 1.00 535.00 4,938 4,825 4,825 Volume Calc Conic 2.00 536.00 5,145 5,041 9,865 3.00 537.00 5,354 5,249 15,114 4.00 538.00 5,649 5,500 20,614 5.00 539.00 6,413 6,026 26,641 Stage-Storage 539 5 538 4 537 3 536 2 535