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Best Available Control Technology (BACT ) Guideline 4.3.8
Last Update: 7/3/2001


Metal Product Coating - Large Steel Structures, < 64 lb VOC/day, Outdoor Coating Operation
Pollutant Achieved in Practice or in the SIP Technologically Feasible Alternate Basic Equipment
PM10HVLP Gun1. Enclose painting operation with dry filters and the use of HVLP application equipment. 2. Electrostatic application
VOCUse of coatings with a VOC content (less water and exempt compounds) as indicated, or lower: - for General Coating: 2.5 lb/gal, - for General Coating, when the ambient temperature is at or below 60 F: 2.8 lb/gal, and - for Specialty Coatings - Extreme Performance or High-Gloss** 3.5 lb/gal and and use of an HVLP spray gun or equivalent application method.1) Thermal incineration and total enclosure (100% capture efficiency), or equal. 2) Catalytic incineration and total enclosure (100% capture efficiency), or equal. 3) Carbon adsorption and total enclosure (100% capture efficiency), or equal. 4) Thermal incineration and open paint booth (65% capture efficiency), or equal. 5) Catalytic incineration and open paint booth (65% capture efficiency), or equal. 6) Carbon adsorption and open paint booth (65% capture efficiency), or equal.
** Specialty Coatings are as defined by District Rule 4603 and use is limited to such applications which are approved by the APCO as requiring use of Specialty Coating.

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.