Vapor Intrusion

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 […]