Containment

Module from the Storage Tank Engineering Curriculum curriculum.

Module 8 - Containment (API 2610, NFPA 30) · Learning Objectives · 1. Size dike volume to 110% of largest tank per NFPA 30 · 2. Apply separation distance per NFPA 30 Table 22.4.1 (tank-to-tank, tank-to-property) · 3. Design drainage and oil/water separator discharge · 4. Provide fire protection: water spray, foam chamber, fixed monitors · 5. Maintain dike seams and integrity; inspect annually · NFPA 30 Separation and Dike Requirements

Parameter	Requirement	Example	Notes	Ref	Notes2
Dike volume	>=110% of largest tank	1.1x tank vol	Rainfall allowance	NFPA 30 22.11	Primary containment
Dike height	No greater than 6 ft generally	Access restriction	Firefighting	NFPA 30	Reduce to allow firewater
Tank to dike wall	Min D (tank diameter) or more	Most 20 ft typical	Prevent hose reach	NFPA 30	Firefighting
Adjacent tanks same containment	>= 1/6 of diameter of larger	30 ft typical	Reduce cascade	NFPA 30	Fire impingement
Containment liner (HDPE or clay)	Required if soil permeable	60 mil HDPE	New tanks	40 CFR 280	Under grade
Firewater monitor	Range 200-250 ft throw	Fixed or mobile	Per tank	NFPA 15	Supplement deluge

Source: Storage_Tank_Engineering_Curriculum_v1.xlsx · Sheet: Containment

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