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Control Techniques Guidelines (CTG) provide EPA’s recommendations on how to control emissions of volatile organic compounds (VOC) from a specific type of product or process (source category) in an ozone nonattainment area. Each CTG includes emissions limitations based on reasonably available control technology (RACT) to address ozone nonattainment. RACT emissions limitations are the lowest emissions limitations that a particular source is capable of meeting by the application of control technology that is reasonably available considering technological and economic feasibility. Air agencies with ozone nonattainment areas must evaluate the recommendations provided in the CTG and determine if it is necessary to modify their existing regulations or create new regulations to assure sources achieve effective emissions reductions in ozone nonattainment areas. Alternative Control Techniques (ACT) describe available control technologies and their respective cost effectiveness.