rockcr.txt

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Rock Crushing Facilities

TNRCC Rule 116.111(3) in Regulation VI requires that Best
Available Control Technology (BACT) be applied to all
facilities that must obtain a permit.  BACT is defined as any
control method which is technically feasible and economically
reasonable.  BACT determinations are made on a case-by-case
basis.  The applicant is encourage to talk with a TNRCC NSR
Permit Engineer to determine the BACT for the facility. 
Current control practices include:  

1.  At least seventy percent control of fugitive dust
    emissions from the crushing, conveying and stockpiling of
    aggregate material (sufficient application of water by
    sprays or fog rains).  
2.  At least ninety-five percent control of fugitive dust
    emissions from all vibrating screens (sufficient water
    application to create saturated conditions with no visible
    emissions.  
3.  At least seventy percent control of fugitive dust 
    emissions from roads and traffic areas (watering, wet or
    dry sweeping acceptable).  

The control requirements listed are guidelines to help the
applicant determine what the TNRCC is currently considering as
BACT; however these control levels are subject to change.