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Best Available Control Technology (BACT ) Guideline 3.1.1
Last Update: 9/10/2013


Emergency Diesel IC engine
Pollutant Achieved in Practice or in the SIP Technologically Feasible Alternate Basic Equipment
COLatest EPA Tier Certification level for applicable horsepower range*
NOXLatest EPA Tier Certification level for applicable horsepower range*
PM100.15 g/bhp-hr or the Latest EPA Tier Certification level for applicable horsepower range, whichever is more stringent. (ATCM)
SOXVery low sulfur diesel fuel (15 ppmw sulfur or less)
VOCLatest EPA Tier Certification level for applicable horsepower range*
*Note: for emergency engines 50 <= bhp < 75, Tier 4 Interim certification is the requirement; for emergency engines 75 <= bhp < 750, Tier 3 certification is the requirement; for emergency engines => 750 bhp, Tier 2 certification is the requirement.

BACT is the most stringent control technique for the emissions unit and class of source. Control techniques that are not achieved in practice or contained in s a state implementation plan must be cost effective as well as feasible. Economic analysis to demonstrate cost effectiveness is requried for all determinations that are not achieved in practice or contained in an EPA approved State Implementation Plan.

This is a Summary Page for this Class of Source. For background information, see Permit Specific BACT Determinations on Details Page.