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So far Black Twig has created 10 blog entries.

Washington Child Care Center Mitigates Risk of Vapor Intrusion

Luckily, awareness about vapor intrusion has grown in recent years. Recently the Environmental Protection Agency (EPA) specified vapor intrusion as a potential pathway in its Superfund Program, designed to fund the clean-up of uncontrolled hazardous waste sites. The program resulted from the passage of the Comprehensive Environmental Resource Conservation and Recovery Act (CERCLA) in the early 1980s.

2018-04-03T12:18:55+00:00April 3rd, 2018|

New Bank Site Includes Vapor Barrier System

Before completing construction of the new facility, the owner opted to have a chemical vapor barrier installed as a preventive measure. This decision was made because improper handling, previously unregulated disposal, or accidental spills and leaks of these car service chemicals may have introduced themselves into the subsurface where they emit toxic gasses into the soil vapor.

2018-04-03T12:10:33+00:00March 12th, 2018|

Cleaner Air is Safer Air

A national chain of early childhood education centers chose the location of its Washington D.C. project on property known to have soil and groundwater contamination left behind from its former uses. The building designers were cognizant of the potential for vapor intrusion risk which might present itself to a sensitive population and researched design options.

2018-04-03T11:53:58+00:00February 1st, 2018|

Retrofitting Buildings With Vapor Barriers

As more scientific data regarding vapor intrusion comes out, and building owners become aware of the health risk to their occupants and the potential long-term liability associated with vapor intrusion in their buildings, interest in mitigations systems for existing buildings will only increase.

2018-04-03T11:43:57+00:00December 7th, 2017|

The Growing Concern with Vapor Intrusion

The Growing Concern with Vapor Intrusion In extreme cases, vapors may accumulate in dwellings or occupied buildings to levels that may pose near-term safety hazards (e.g. explosion) or acute health effects. This occurs when there is a migration of chemical-containing vapor from a subsurface source into an overlying building. At [...]

2017-06-27T11:28:58+00:00March 14th, 2017|

Not All Vapor Barriers are Created Equal

Not All Vapor Barriers are Created Equal Vapor barriers…are they all the same? What is the difference between a vapor barrier and a moisture barrier? Isn’t a water vapor barrier the same as soil and gas vapor barrier? Chemical vapor venting channel designed to divert dangerous vapor away from a building. [...]

2017-06-27T11:27:20+00:00March 14th, 2017|

Constructing the Vapor Barrier

CONSTRUCTING THE VAPOR BARRIER The general contractor needed to complete the concrete pour phase of the construction in a timely manner to stay on schedule. In order to meet these specific requirements, the vapor barrier construction would need to be finished in a single day and the installation needed to wait until [...]

2016-12-14T11:03:44+00:00December 14th, 2016|

These Vapors Aren’t Water

THESE VAPORS AREN'T WATER Mention “vapor barrier” and many people are like to think of “moisture barrier,” something to keep water vapor out of wall cavities and prevent the growth of mold. That’s not what Wes Robb has in mind. For Robb, director of technical strategies and applications at Vapor Mitigation Strategies, a vapor [...]

2016-12-14T10:52:38+00:00August 29th, 2016|

Vapor Mitigation Strategies Opens its Doors

VAPOR MITIGATION STRATEGIES OPENS ITS DOORS Wellington Environmental Company focused on eliminating Vapor Intrusion St. Louis, Mo. (June 2016)— Vapor Mitigation Strategies, a Wellington Environmental company, launches, offering cost-effective barrier solutions for the growing issue of Vapor Intrusion (VI) facing the construction industry. Wholly-owned by St. Louis based Wellington Environmental, Vapor Mitigation Strategies offers [...]

2016-10-18T13:19:16+00:00August 29th, 2016|

Retail–Sunset Hills, Missouri

The GC needed to complete the concrete pour phase of the construction in a timely manner to stay on schedule. In order to meet these specific requirements, the vapor barrier construction would need to be finished in a single day.

2017-08-08T16:30:10+00:00May 27th, 2016|