12 2026 02 12 Crestmont CC Stormwater Management Report

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