Vapor Intrusion

Vapor Intrusion as a Major Cleanup Driver

Vapor Intrusion Emerges as a Major Cleanup Driver When I started work as an environmental professional in 1986, I do not recall thinking about or even being aware of the risks posed by vapor intrusion. Vapor intrusion (sometimes referred to as “VI”) occurs when a volatile solvent or the volatile portion of a petroleum hydrocarbon […]

New Jersey DEP Adopts USEPA’s “New” PCE Criteria

What are USEPA’s New PCE Toxicity Values About? It has been a year since the USEPA issued its new toxicological profile for tetrachloroethylene (PCE).  The new profile resulted in the revision of PCE’s toxicity values in EPA’s Integrated Risk Information System (IRIS).  Despite their obscurity, IRIS toxicity values carry great importance because they are at […]

Decorative Oil Lamps: A Surprising Source of Indoor VOCs

Impacts to indoor air quality from volatile organic compounds (VOCs) have been receiving greater attention recently due to a growing awareness of vapor intrusion (VI) from underground oil and chemicals.   VI occurs when chemicals spilled on the ground migrate under structures and then volatilize up into indoor air.  After a recent residential basement oil spill […]

Vapor Intrusion – Historic Perspectives, Current Considerations

As we all know, one of the hottest topics in the environmental industry right now is vapor intrusion.  In Massachusetts, vapor intrusion considerations have been around for more than 20 years, since the beginning of the Massachusetts Contingency Plan (MCP) program.  This is no surprise, as Massachusetts has been a technical and regulatory leader in […]