Soil Vapor Contamination

Soil vapor can become contaminated when chemicals evaporate from underground sources. These chemicals include: 

• Volatile organic compounds (VOCs) 

• Some semi-volatile organic compounds (SVOCs) 

• Certain inorganic substances, such as elemental mercury 

Additionally, common subsurface sources of volatile chemicals include: 

• Contaminated soil or groundwater 

• Buried waste 

• Non-aqueous phase liquids (NAPLs) 

• Underground storage tanks or drums 

Contaminated soil vapor can enter buildings due to factors like changes in barometric pressure, wind, temperature differences, or exhaust fan-induced depressurization. Once inside, it mixes with indoor air and may impact air quality. 

To lean more, download Vapor Intrusion Testing Q&A.  

Industries We Serve

Pace® is committed to providing high quality data for critical decision-making. We understand that our ability to deliver results when needed means you are able to report to your clients or regulatory bodies on time. Your Pace® dedicated project manager will see to it. 

• Experienced Analysts

  Pace® vapor intrusion professionals understand the variability of soil vapors and the analytical capabilities needed by the most demanding projects. 

• Fast Results

  Pace® offers a fast turnaround time, extensive capacity, and vast experience in the implementation of the EPA Vapor Intrusion Technical Guide and state-level regulations. 

• Advanced Methodologies

  With our advanced soil gas sampling equipment, testing, and analytical capabilities, you can have confidence in your sample collection and data quality.