Among containment berms, the most popular is the rapid rise containment unit. This system is specially designed to hold in a lot of pressure. Instead of having sidewalls that are a nuisance, this system has sidewalls that stay down until when needed. On top of it, they have a foam ring that is made to rise with liquid, so that the pressure can be exerted evenly all through, thus preventing the damage arising from one point pressure.
The other kind of containment unit is the one with a compact d
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