Vapor Intrusion: Spatial Variation

Cox-Colvin's October 2012 Focus on the Environment newsletter discussed variability in airborne vapor concentration over time and its relation to Vapor Intrusion (VI). However, at least in soil gas, temporal variation may be less of a problem than spatial variation.
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Vapor Pin Included in Michigan Vapor Intrusion Guidance

Cox-Colvin & Associates, Inc., in cooperation with the Michigan DEQ, completed a comparative study of sub-slab soil-gas sampling equipment to evaluate the Vapor Pin as an acceptable technology for vapor intrusion studies. The study demonstrated that samples collected through the Vapor Pin were consistent with those collected by other means. As a result, a SOP on the use of the Vapor Pin has been included as Appendix D.7 of Michigan DEQ's January 2012 Draft Vapor Intrusion Guidance - "Sample Collection and Evaluation of the Vapor Intrusion to the Indoor Air Pathway When the Generic Criteria Do Not Apply". (See p. 167 of the pdf for the Vapor Pin SOP).

Cox-Colvin is participating in a similar study in California in late April, in cooperation with H&P Mobile Geochemistry, Inc. Results of the Michigan and California studies are being submitted as a presentation topic at the October 2012 AWMA Conference in Denver, CO.

Click here for more information on the Vapor Pin.

Cox-Colvin to present on Innovative Subslab Soil-Gas Sampling Methods

Cox-Colvin employee Mort Schmidt will be presenting at A&WMA's 'Air Quality Measurement Methods and Technology' Conference to be held April 24 - 26, 2012 in Durham, North Carolina.  Mort will be presenting his talk, entitled "Innovative Sampling Methods for Focusing the Subslab Soil-Gas Investigation" on Wednesday, April 25th @ 2:45 pm (Session 7A). Mort's presentation will highlight an investigation in which Cox-Colvin installed and sampled 145 sub-slab soil gas sampling points in five days to locate a source of tetrachloroethene at a manufacturing facility.

Cox-Colvin also will be exhibiting the Vapor Pin at the conference.  Join us at Booth #19 to learn more about the Vapor Pin - a re-usable sub slab vapor sampling device.

Short-listing Vapor Intrusion Constituents: Not Always A Good Idea

Many Vapor Intrusion guidance documents encourage analyzing a short list of comhttp://www.blogger.com/img/blank.gifpounds in indoor air -- for example, instructing the lab to report only the compounds detected in subsurface samples during previous related investigations. But be careful! As vapor intrusion assessment moves toward indoor air sampling, analyzing only for a short list of compounds could come back to bite you.
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Vapor Pin Receives Pollution Engineering 2011 Editor's Choice

Cox-Colvin & Associates, Inc's Vapor Pin has received Pollution Engineering's 2011 Editor's Choice Award.  The Vapor Pin is a unique, patented, reusable sub-slab soil gas sampling device designed to eliminate many of the problems associated with traditional sub-slab soil gas sampling methods.  For more information on the Vapor Pin, click here.

Vapor Pin Video

FINALLY! Sub-slab vapor sampling equipment that installs in minutes, eliminates the need for grout or other adhesives, and is easily retrieved for reuse.

See for yourself just how easy it is to install, use, and retrieve Cox-Colvin's patented Vapor Pin sub-slab vapor sampling device!

For more information on the Vapor Pin, click here.

Cox-Colvin Announces Commercial Release of the Vapor Pin™ - An Innovative Sub-slab Soil Gas Sampling Device

Cox-Colvin proudly announces the commercial release of the Vapor Pin, a patented, reusable sub-slab soil-gas sampling device that eliminates many of the frustrations associated with traditional sub-slab vapor sampling methods. Because of its ease and speed of installation, sample collection, extraction, and reuse, we believe the Vapor Pin will become the new standard for sub-slab soil gas sampling.
Click here for Vapor Pin Press Release.
Click here for more information on the Vapor Pin.

Cox-Colvin Patents the Vapor Pin™, a Sub-Slab Soil Gas Sampling Device

On May 4, 2010, Cox-Colvin applied for and received a patent for the Vapor Pin™, a sub-slab sampling device that we believe will eliminate many of the headaches surrounding sub-slab soil gas sampling. The goal of the design effort was to come up with a sub-slab soil-gas collection device that would reduce the potential for leaks, be easily installed and retrieved using commonly obtainable tools, be reusable, reduce the time and cost of sub-slab sampling, and improve the quality of samples obtained from the sub-slab.

The Vapor Pin™ fits the bill. It's installed using common hand tools, doesn't require use of grout (thus saving another day in the field), and provides a single leak-proof connection between the sub-slab and the sampling device. We've also devised a leak detection method that we believe could become the standard for the industry.

We're refining the design at this time and plan to publish our results in the near future. If you'd like to receive more information on the Vapor Pin™, please drop us an email at info@coxcolvin.com. Please include Vapor Pin in the subject.