Vapor−mounted seal definition
Vapor−mounted seal means any primary floating roof seal mounted so that there is an annular vapor space underneath the seal. The annular vapor space is bounded by the bottom of the primary seal, the tank wall, the liquid surface, and the floating roof.
Vapor−mounted seal means a continuous seal that is mounted such that there is a vapor space between the hazardous waste in the unit and the bottom of the seal.
Vapor−mounted seal means a continuous seal that completely covers the annular space between the wall of the stor- age vessel or waste management unit and the edge of a floating roof and is mounted so that there is a vapor space between the stored liquid and the bottom of the seal.