Summary Title IV - Acid Rain * SO2 REDUCTION: A 10 million ton reduction from 1980 levels, primarily from utility sources. Caps annual utility SO2 emissions at approximately 8.9 million tons by 2000. * ALLOWANCES: SO2 reductions are met through an innovative market-based system. Affected sources are allocated allowances based on required emission reductions and past energy use. An allowance is worth one ton of SO2 and it is fully marketable. Sources must hold allowances equal to their level of emissions or face a $2000/excess ton penalty and a requirement to offset excess tons in future years. EPA will also hold special sales and auctions of allowances. * PHASE I: SO2 emission reductions are achieved in two phases. Phase I allowances are allocated to large units of 100 MW or greater that emit more than 2.5 lb/mmbtu in an amount equal to 2.5 lb/mmBtu x their 1985-87 energy usage (baseline). Phase I must be met by 1995 but units that install certain control technologies may postpone compliance until 1997, and may be eligible for bonus allowances. Units in Illinois, Indiana or Ohio are allotted a pro rata share of an additional 200,000 allowances annually during Phase I. * PHASE II: Phase II begins in 2000. All utility units greater than 25 MW that emit at a rate above 1.2 lbs/mmBtu will be allocated allowances at that rate x their baseline fuel consumption. Cleaner plants generally will be provided with 20% more allowances than would have been received based on their baseline consumption. 50,000 bonus allowances are allocated to plants in 10 midwestern states that make reductions in Phase I. * NOx: Utility NOx reductions will help to achieve a 2 million ton reduction from 1980 levels. Reductions will be accomplished through required EPA performance standards for certain existing boilers in Phase I, and others in Phase II. EPA will develop a revised NOx NSPS for utility boilers. * REPOWERING: Units repowering with qualifying Clean Coal Technologies receive a 4 year extension for Phase II compliance. Such units may be exempt from New Source Review requirements and New Source Performance Standards. * ENERGY CONSERVATION & RENEWABLE ENERGY: These projects may be allocated a portion of up to 300,000 incentive allowances. * CLEAN COAL TECHNOLOGIES (CCT): Certain CCT demonstration projects may be exempt from NSPS, NSR, and Title I nonattainment requirements. * MONITORING: Requires continuous emission monitors or an equivalent for SO2 and NOx and also requires opacity and flow monitors.