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Announcements


Vapor Pin and our Europe distributor Ribble-Enviro will be exhibiting at the
Ground Gas 2018: Assessing and managing ground gas risk
Date: 01 March 2018 - Venue: Holiday Inn London - Kensington High Street, London, Wrights Lane W8 5SP
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Enjoyed listening to Tony McDonald with AZ solutions talk about pilot test at the Southeastern States VI Symposium. ... See MoreSee Less

Soil Gas Control Systems in New Construction (CC-1000). This new standard addresses RRNC construction for virtually
every building that is larger than a one- and two-family
dwelling. https://aarst-nrpp.com/wp/store/rrnc-for-larger-buildings-cc-1000/
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Great seeing everyone at last night's MSECA event. ... See MoreSee Less

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Any CSIA applications in vapor intrusion issues yet? Yes..Tom McHugh published ESTCP report ER-201025 which addresses CSIA for vapor intrusion. McHugh reported that CSIA could be effective in distinguishing between interior and subsurface vapor sources, but it often leads to inconclusive results and might be unsuitable at 50% of sites. Our experience with CSIA in groundwater has been inconclusive, so we continue to use indoor air/subslab ratios and other more conventional lines of evidence to distinguish between VI and background sources. ... See MoreSee Less

CYBER MONDAY SALE - Today only 10% off with Coupon Code VPCBRR ... See MoreSee Less

Vapor Pin Brazil is nearing fruition. Within the month we will be able to start accepting orders on our Brazil website and shipping vapor pins made in Brazil and from our Brazil fulfilment center. ... See MoreSee Less

In cooperation with the American Institute of Professional Geologists (AIPG), Ohio Section, Cox-Colvin and others are participating in a 2-day course on vapor intrusion on October 24 and 25, 2017 in Delaware, Ohio. ... See MoreSee Less

A Wonderful Testimonal and a wonderful conference! ... See MoreSee Less

Main Content

Vapor-Intrusion Assessments


Using Vapor Pins® for Vapor-Intrusion Assessments
The Vapor Pin® has a number of applications, but it was designed to collect soil gas for vapor-intrusion assessments, and it does it well. The soil gas directly beneath a building floor, “subslab” soil gas, best represents the risk of vapor-intrusion, because it is the next closest thing to indoor air. But unlike indoor air, subslab soil gas generally does not contain background contamination from indoor or outdoor sources. Subslab soil gas more representative of indoor conditions than deep soil gas, and it’s easier to collect using hand-held equipment.

Subslab soil gas is normally collected prior to sampling indoor air. One or more Vapor Pins® are installed by drilling 5/8-inch holes through the floor with a hammer drill, and installing them, as described in the Standard Operating Procedure (SOP). For a one-time sampling event, one can use brass Vapor Pins® installed in the stick-up configuration. If repeat sampling is needed, we recommend installing stainless-steel Vapor Pins® in the flush-mount configuration.

After installing the Vapor Pin® and allowing soil gas to equilibrate for two hours or more, connect the Summa canister, TO-17, or other sample container to the Vapor Pin®, purge the dead space in the sample train, and collect the sample, as described in the SOP. As discussed in the memorandum “Using Vapor Pins® for Source Characterization”, vapor sources are often located away from obvious locations, such as buried tanks and degreasing areas, so we recommend conducting field screening at additional locations when working near potential source areas.

Always follow the appropriate guidance when assessing vapor intrusion. Some regulatory agencies allow or encourage the use of the Vapor Pin®, but some guidance might preclude the use of some devices.

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