Environmental Site Assessment

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 […]

Coal Tar – Yesterday’s Nuisance, Today’s Problem

Coal Tar – Yesterday’s Nuisance, Today’s Problem OTO’s work includes a lot of remediation projects.in Massachusetts and Connecticut. One of the things we run into on occasion is coal tar, a viscous, black, smelly product of our industrial heritage. Coal tar is not one of the more common challenges encountered at MCP sites in Massachusetts, […]