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CWA Specific Solutions by IRGAS and MIRAN

1.     In 2008 North Carolina State University (NCSU) College of Textiles, Raleigh, N.C., opened a state-of-the-art Man-In-SimulantTest (MIST) facility at the College's Textile Protection and Comfort Center (T-PACC). The facility was funded by a $2 million US Department of Defense grant. That facility has as part of its instrumentation a CIC Photonics, Inc. IRGAS system that uses FTIR analysis in monitoring the concentration of a non-toxic simulant of CBW agents that permits validation of fabrics or textiles used in HAZMAT protective suits of first responders.  1. "The new facility enables testing of complete protective ensemble suits in nontoxic chemical vapors that are similar to toxic chemical and biological agents, and will provide test results and analysis more quickly than other such facilities, according to NCSU2". This development was preceded by studies done earlier by the Department of Defense.

2.     In the late 1990s, concerns about how to reduce the dangers for first respondents who would be required to enter chemically contaminated buildings were leading to procedures where monitoring of the airborne chemicals was essential. Studies were conducted to determine the effectiveness in removing chemical vapors from a building by using fans to afford quick rescue in the event of a terrorist bomb that employed chemical warfare (CW) agents. In a summary report, "Use of Positive Pressure Ventilations (PPV) Fans to Reduce the Hazards of Entering Chemically Contaminated Buildings", ECBC-TR-065 issued in July, 20083, the U.S. Department of the Army at the Edgewood Chemical Biological Center reported using eight (8) Miran SapphIRe spectrometers to monitor SF6 and Methyl Salicylate (MS) in different locations of a building, and an FTIR system to measure vapor concentration leaving the building using fans to evacuate the gases from the buildings. The studies were done according to standard Man in Simulant Test (MIST) procedures. The results of the studies verified that the PPV fans significantly reduced the hazards of the gases to the rescue firefighters used in the studies, as shown by the rapid decreases in the concentrations of both MS and SF6 from the building interiors.

References

Analysis of Factors Influencing Methyl Salicylate Adsorption on Textile Skin Simulants. J.L. Gladish, M.S. Thesis. Source:http://repository.lib.ncsu.edu/ir/bitstream/1840.16/363/1/etd.pdf

Source: http://www.textileworld.com/Articles/2008/September_2008/News/NCSU_MIST_Lab_Tests_Protective_Garments.html

"Use of Positive Pressure Ventilations (PPV) Fans to Reduce the Hazards of Entering Chemically Contaminated Buildings", ECBC-TR-065. Source: http://www.ecbc.army.mil/downloads/cwirp/ECBC_cwirp_ppv_summary_report.pdf

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