Vapor Intrusion occurs when vapors from volatile chemicals in contaminated soil or ground water migrate through subsurface soils and/or preferential pathways (such as underground utilities) and impact the indoor air quality of any overlying buildings.*

Recent advancements in toxicological science and inclusion in the ASTM E1527-13 guiding Phase I Environmental Site Assessments have placed priority on evaluating Vapor Intrusion pathways. Regulators across the county are increasing requirements for sampling these pathways.

Sub-slab soil gas sampling is used in existing buildings that may have or be near sources of Vapor Intrusion contaminates.

See how this how testing is conducted:

PM conducts Vapor Intrusion Assessments and can help you understand how vapor issues may affect your transactions.  PM also has success in mitigating vapor intrusion on a variety of projects through the installation of Sub-Slab Depressurization Systems, which are common mitigation systems for existing construction.

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* http://www.michigan.gov/deq/0,4561,7-135-3311_4109_66336---,00.html