Non-intrusive vapor collection apparatus

An apparatus for removing vapors comprising:

• a substantially vapor-proof layer;
• and
• a plurality of rigid supporting structures that extend from and support the substantially vapor-proof layer;
• wherein the substantially vapor-proof layer and rigid supporting structures, when positioned over a floor of a building or ground, form a wall-to-wall gas collection space that contains gas that rises from the floor of the building;
• and
• wherein at least some of the rigid supporting structures define passageways that allow for the movement of the gas throughout the space.

A gas collection structure comprising:

• a plurality of mats, each mat comprising:
• a substantially vapor-proof upper layer;
• and
• a plurality of rigid support structures that extend from the upper layer and support the upper layer and contact a floor of a building when placed in operation;
• wherein the upper layer and the plurality of rigid support structures in contact with the floor define an air containment space under the upper layer;
• wherein at least some of the rigid support structures define passageways that allow for the movement of air throughout the space;
• and
• wherein each mat is joined to an adjacent mat by a substantially vapor-proof connector so that the plurality of mats form a wall-to-wall collective air containment space in which air passes under the plurality of mats.