Home About Us How ASD Works Ground Contaminant Information System Photos Contact Us       Active Soil Depressurization (ASD) is the most effective and consistent method of preventing the passage of ground contamination from the soil to the indoor air supply of a building.    Air Quality Control has corrected soil vapor problems in over 20,000 buildings, homes, schools, townhouses, military facilities, and warehouses since 1988.  Contaminants include: Radon Gas Trichloroethylene (TCE) Perchloroethylene (PCE or PERC) Volatile Organic Compounds (VOCs) Tetrachloroethylene (Dry Cleaning Fluid) Gasoline Ground Contamination (Petroleum Hydrocarbons) Methane  Natural Gas  Many other ground contaminants, solvents, and gasses Offices Serving the Following States: Michigan   Colorado   Indiana   Pennsylvania   Connecticut   Massachusetts   Kentucky  Wisconsin   Maryland   West Virginia   Delaware   New York  &  Surrounding States Call Toll-Free 1-800-420-3881 Free Estimates            Same-day Service         Guaranteed Results         Affordable Rates    We Mitigated Fort Knox!  Call for a FREE estimate to remedy your ground vapor problem:  1-800-420-3881