Indoor Air Quality & Vapor Intrusion

Indoor Air Quality and Mold

Workers who experience higher than usual incidences of colds and infections may suspect that a “sick building” causes their illnesses. To help determine the source of employee complaints, Mid-Atlantic conducts Indoor Air Quality Surveys (IAQ) which may include:

  • Direct measurement of carbon dioxide (CO2), carbon monoxide (CO), temperature, and relative humidity
  • Inspection of the heating, ventilation, and air conditioning (HVAC) systems and operational procedures
  • Collection of wipe samples and indoor/outdoor mold spore air samples
  • Interviews and questionnaires with employees

Vapor Intrusion

Vapor intrusion (VI) is a process by which chemicals in soil or groundwater migrate to indoor air above a contaminated site. Recent findings in the environmental industry indicate that VI often represents the most significant risk for exposure to building occupants at or near a contaminated site. Common contaminated sites include dry-cleaners, gasoline stations, automotive repair and a variety of manufacturing/industrial facilities. Mid-Atlantic has been a leader in this field and routinely works with regulators and industry experts to stay on the cutting edge of VI assessment and mitigation regulations and trends. Our vapor intrusion experience includes:

  • Field screening assessments and surveys
  • Soil gas, sub-slab, crawlspace and indoor air sampling
  • Calculation of slab attenuation factors
  • Risk assessment and modeling
  • Sub-slab spray applications and floor coatings
  • Design, installation and operation of active and passive sub-slab venting systems

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