Jan 21, 2025 · Vapor intrusion occurs when there is a migration of volatile chemicals from contaminated groundwater or soil into an overlying building. Volatile chemicals can emit vapors that may migrate through subsurface soils and into indoor air spaces.

Sep 26, 2024 · Vapor intrusion occurs when there is a migration of vapor-forming chemicals from any subsurface source into an overlying building. Recognition of soil vapor intrusion to buildings and other enclosed spaces occurred in the 1980s with concerns over radon intrusion.

What is vapor intrusion? When chemicals or petroleum products are spilled on the ground or leak from underground storage tanks, they can give off gases, or vapors that can get inside buildings. Common products that can cause vapor intrusion are gasoline or diesel fuel, dry cleaning solvents and industrial de-greasers. The vapors move through ...

What is vapor intrusion? Vapor intrusion refers to the migration of chemical vapors from any underground source into structures (e.g., homes, businesses, schools). Where and when is vapor intrusion a potential concern? Vapor intrusion is a potential concern wherever buildings or other enclosed structures are located near an underground source ...

Dec 13, 2024 · These documents are intended for use at any site being evaluated by EPA pursuant to the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), as amended, or the corrective action provisions of the Resource Conservation and Recovery Act (RCRA), as amended; they are also intended for use by EPA’s brownfield …

Vapor intrusion mitigation systems are safe to use and will improve the quality of the indoor air by reducing indoor levels of chemical vapors from vapor intrusion. They can also reduce indoor levels of radon gas and soil moisture.

This fact sheet explains how vapor intrusion occurs and what factors can cause vapors (sometimes called gases) to move into indoor air. Why is vapor intrusion important to me? When chemicals move indoors, you can be exposed to them by breathing indoor air. This exposure can

What is Vapor Intrusion? When chemicals or petroleum products spill or leak into the ground, they may give off gases or vapors that can get inside buildings, such as homes.

June 2015 Assessing and Mitigating the Vapor Intrusion Pathway from Subsurface Vapor Sources to Indoor Air DISCLAIMER This document presents current technical recommendations of the U.S. Environmental Protection Agency (EPA) based on our current understanding of vapor intrusion into indoor air from subsurface vapor sources .

Conceptual Site Model of Vapor Intrusion from Contaminated Groundwater (EPA 2015a) ....6 Figure 3-1. Communication Flows Between Programs …