Soil Gas Characterization refers to the methods utilized to collect vapor data at sites potentially affected by volatile organic compounds (VOCs), including chlorinated solvents, petroleum hydrocarbons, methane, hydrogen sulfide and semi volatile organic compounds (SVOCs), as well as heavy metals and toxic or carcinogenic chemicals of concern. The data obtained from a soil gas investigation can be used to identify the chemicals of concern and the spatial distribution of contamination at a site or to evaluate the potential for indoor air contaminants for health risk assessment purposes.

Terra-Petra has:

  • A Registered Environmental Assessor on staff with extensive experience in Soil Gas Characterization.
  • A thorough understanding of the California Department of Toxic Substance Control (DTSC) Vapor Intrusion Guidance.
  • Knowledgeable about the DTSC and Los Angeles Regional Water Quality Control Board (LARWQCB) “Advisory” for Active Soil Gas Investigations.
  • Experience employing many of the Environmental Protection Agency’s (EPA) test methods for soil vapor.

Based on the results of the Soil Gas Characterization it may be necessary to Remediate the known contaminants.


Contact Terra-Petra for a brownfield soil gas characterization and/or health risk assessment proposal today.