|From:||Lenny Siegel <email@example.com>|
|Date:||9 Feb 2006 18:21:18 -0000|
|Subject:||[CPEO-BIF] New York and the TAGA|
The New York state Assembly report on Vapor Intrusion, found at|
specifically recommends that New York agencies consider the use of U.S. EPA's Trace Atmospheric Gas Analyzer (TAGA).
"DEC and DOH should consider the procurement of a TAGA unit for use at vapor intrusion and other contaminated sites.
"Experience at the Hopewell site has shown such units to be particularly effective at identifying the source of contaminants in indoor air. Such a tool has the potential to help the agencies gain a better understanding of the likelihood of contamination being associated with a source outside the home, information that can be crucial in deciding whether to mitigate or take other actions." (p. 49/p. 54 of PDF file)
The TAGA is a van-mounted instrument which, with the aid of a long tube, generates real-time measurements of indoor air contamination. It is useful not merely in generating a large number of samples, but in identifying pathways (such as openings in foundations) and interfering sources (such as consumer products). It can also be used to correlate results with real-time meteorological data.
A couple of weeks ago, I plugged the TAGA to a group of state regulators, who laughed that it was too expensive. However, though initial costs may be high, relative to summa canisters, the conventional sampling instruments, the cost per sample should be cost-competitive, particularly if the TAGA is used frequently. Employing it on multiple projects, with different contract consultants, may require changes in the way New York (or any other state) organizes its vapor intrusion investigations.
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