Heatset Offset Printing June 1995 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 determinations are made on a case-by-case basis. Current BACT guidelines for heatset offset printing is: Uncontrolled ink oil emissions of twenty-five tons per year or more to employ add-on controls that reduce all emissions from heatset presses by ninety-five percent or more and to use alcohol substitutes in fountain solutions and low VOC cleaning materials. If the applicant proposes the emissions levels listed above, a detailed BACT analysis is not needed. Any BACT proposal that is different from the requirements stated above needs to be explained in detail. The BACT discussion needs to be formatted after the TNRCC three tier approach or the EPA top down approach. In either analysis any cost estimates for control equipment need to be amortized over the life of the equipment and the annualized operating costs need to be included. The EPA document OAQPS Control Cost Manual (EPA 450/3-90-006) describes how the analysis should be performed and provides the format for presentation of the results. This manual can be obtained by writing the National Technical Information Service (NTIS) at 5285 Port Royal Road, Springfield, Virginia 22161 or by calling the NTIS at 703-487-4650.