SW6231002_Design Calculations_20240906 (5)

C= NTECHU
ENGINEERED SOLUTIONS Filterra Sizing in North Carolina
Design Engineer: Irs Blue Cells= Input
Date 8/20/2024 Black Cells= Calculation
Site Information
Project Name Serenity-SCM 13
Project State North Carolina
Project Location Harnett County
Drainage Area,Ad 1.45 ac
Impervious Area,Ai 0.93 ac
Impervious Runoff Coefficient,Ci 0.90
Pervious Area,Ap 0.52
Pervious Area Runoff Coefficient,Cp 0.30
%Impervious 64%
Weighted Runoff Coefficient,Cw 0.68
Filterra Sizing Calculations
Filter Surface Area/Drainage Area Ratio 0.39% Per NCDEQ Manual,Chapter D.3,Table 1
Required Filterra Media Surface Area, 186 ft2
Filterra System
Filterra Configuration Bioscape Vault 2 ea - 8 x 12 Vaults
Filterra Model ID See Note
Note: Drainage area is too large for single Filterra system.Consider a different Filterra configuration, utilizing multiple structures,or utilizing
Filterra Bioscape.Contact Contech for more info.
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