Flammable Liquid Dike/Containment Sizing Calculator

Calculate flammable liquid containment dike area and wall height per NFPA 30 for tank spill containment.

Input Parameters

Results

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Required Dike Volume
gallons
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Minimum Dike Floor Area
ft²
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Minimum Dike Wall Height
ft
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Potential Spill Fire Area
ft²
Note: NFPA 30 Section 22.11 requires containment of the largest single tank volume within a diked area. Dike walls shall not exceed 6 ft in height. Drainage must accommodate 10-year, 24-hour rainfall. Coordinate with NFPA 30 Table 22.4.2.1 for tank spacing within dikes.

Reference

NFPA 30 Sec 22.11 Dike/Containment: Dike Volume >= Largest Tank Volume + Tank Displacement Dike Area = Required Volume (ft³) / Usable Depth Usable Depth = Design Depth - Freeboard - Rainfall Wall Height = Usable Depth + Freeboard + Rain Allowance 1 ft³ = 7.48 gallons Spill Fire Area = Dike Floor Area (worst case)