ASTSWMO Policy Position on UST Open Bermed Containment Systems

This position paper addresses open bermed containment systems that are used to meet the spill prevention equipment requirements for underground storage tanks (USTs) outlined in 40 CFR 280.20(c). Bermed containment systems are configured with small concrete berms or curbing that surround the fill riser(s) for a UST system and are typically used at high volume facilities. The floor of the bermed containment systems are generally constructed of concrete and most of these systems have a drain that diverts any spilled liquid, rainwater, or melted snow, to an oil/water separator.

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