Secondary Containment Calculator
Calculate secondary containment volume and dimensions per EPA SPCC requirements.
Inputs
Results
Required Containment (gallons)
724
Containment Area (sq ft)
48.4
Base Containment (gallons)303
Precipitation Allowance (gallons)421
Square Dike Side (ft)7
Estimated Cost$726
Liner Required1
Inspection Interval (days)30
How to Use This Calculator
- Enter the Largest Container (gallons) in the storage area — EPA SPCC requires containment of at least that volume.
- Enter Total Storage (gallons) for the aggregate inventory; the calculator uses 10% of total or the largest container, whichever is greater.
- Select Containment Method (1=Dike/Berm, 2=Double-Wall Tank, 3=Vault, 4=Drainage System) appropriate for your facility.
- Toggle Outdoor Installation and enter the 25-Year Storm (inches) to add precipitation capacity for outdoor berms.
- Review Required Containment (gallons) and Containment Area (sq ft) to design or verify your dike dimensions.
- Use Estimated Cost and Inspection Interval (days) for budget planning and to establish your inspection schedule.
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