Most sources of fugitive emissions are from multiple points rather than single point sources. So, open path area or perimeter monitoring provides more meaningful fugitive emissions data than an array of point sensors or a program of grab sampling. Point measurements may underestimate emissions because of missing locations with high gas concentrations, or conversely overestimate because they are located in areas of high concentrations. Grab sampling programs typically check only a small percentage of potential leak locations and extrapolate results to an entire facility. Wide margins of uncertainty are associated with such extrapolations. Open path monitoring provides continuously updated, real-time, integrated emissions across a facility boundary.This provides a complete picture of the fugitive emissions across that boundary,enabling identification of specific operations and times that give rise to higher emissions, and so enabling these emissions to be properly managed and controlled.
By Boreal Laser Inc. based in Edmonton, ALBERTA (CANADA).
Airports, small and large, use noise and operations monitoring systems to reduce the noise of flight operations in the surrounding community. Noise monitoring is generally used to evaluate noise abatement programs and to develop aircraft departure and arrival procedures that minimize the impact of aircraft noise based upon altitude, flight path, and time of day. Noise monitoring is linked with radar tracking so that specific aircraft can be identified when noise limits are exceeded and so operational requirements can be enforced.
Larson Davis provides noise monitoring systems to airports, consultants, and system integrators with the technology and support to make a successful program.
By Larson Davis, a division of PCB Piezotronics based in Depew, NEW YORK (USA).
Since 1973, HI-Q has directly and successfully served the commercial nuclear industry worldwide with reliable, High Quality (HI-Q), continuous duty air sampling equipment, systems and accessories. For over 30 years, our products, professional design capability, and consumables have been used in remote & internal air monitoring programs including stack sampling system designs which implement the “shrouded probe” per ANSI N13.1 1999 design specifications.
By HI-Q Environmental Products Company based in San Diego, CALIFORNIA (USA).
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