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Stone Crushing Plants NSSGA Sponsored Compilation of PM10 and PM2.5 Emission Factors |
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Air Control Techniques, P.C. designed and conducted fugitive PM10
emission factor test programs at a number of stone crushing plants as
part of a cooperative program between the National Stone, Sand and
Gravel Association (NSSGA) and the U.S. EPA. This testing involved the
use of quasi-stack enclosures for testing tertiary crushers and
conveyor transfer points. An innovative traversing hood system was
developed by Air Control Techniques, P.C. for testing sloped, vibrating
screens. Upwind-downwind sampling procedures were used for evaluating
emissions from large storage piles. As a result of this testing, the
U.S. EPA has replaced many of the relevant emission factors in AP-42
with emission factors that are considerably more accurate.
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