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Rainshield [1]

A roof-like shield erected between an aboveground tank and an adjoining dike [2] wall. The shield helps prevent rainwater from accumulating within the diked area. Any area enclosed by a rainshield must be vented for fire-safety purposes, to prevent pressure buildup from vapors during a fire exposure.

Source URL (modified on 10/22/2014): https://testing.pei.org/wiki/rainshield

Links
[1] https://testing.pei.org/wiki/rainshield
[2] https://testing.pei.org/node/273