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Toxic Pollution Threats

Sub-slab Depressurization System for Indoor Air Pollution

Volatile toxic chemicals are routinely found in the ground at polluted gas stations, industrial sites and dry cleaners. They can contaminate the indoor air of nearby homes and buildings by migrating through foundation cracks, floor drains and gaps associated with sewer, water, gas and electric lines.

"Sub-slab depressurization" systems help prevent solvents, gasoline and other volatile pollutants from intruding into homes and buildings. A hole is cut through the foundation and a perforated pipe is inserted into the area under the foundation. The pipe is connected to a blower located on the outside of the foundation wall that draws contaminants from under the foundation slab and vents them into the outdoor air.

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