CO 2 and conventional air pollutants, as well as undergoing air quality impacts modeling.Importantly, the group of bioenergy facilities thus affected would include not only the facilities thatreceived preconstruction permits after July 1, 2011, when Step II of the Tailoring Rule came intoeffect, but also those facilities that had previously received a permit but had not yet startedconstruction by July 1. The CO 2 exemption has thus allowed most facilities with permits issued inrecent years to avoid PSD permitting. No coincidence, a flurry of state-level permits were issuedjust before the July 1 2011 deadline when Step II permitting was to take effect, even though EPAhad indicated it would grant the exemption. Of the permits we reviewed that were issued in 2011,14 were issued before July 1, with 8 of those issued in June. A total of 6 were issued after June.Following EPA’s exemption for bioenergyCO 2 , the Center for Biological Diversity withother environmental groups sued the Agency,challenging the action. In July 2013, the U.S.Court of Appeals for the District of ColumbiaA federal court found that EPA’sexemption for biomass CO 2 was unlawful,and that bioenergy emissions shouldcount under Clean Air Act permittingCircuit ruled in favor of the groups, determining that EPA had unlawfully exempted bioenergyfrom regulation under the Clean Air Act. 31 However, rather than issuing a mandate to EPA toreverse the exemption, the court granted a long delay to the industry litigants that had joined withEPA to defend the exemption, extending the deadline for filing a petition for reconsideration orrehearing by all of the Court’s active judges. 32 The three-year exemption in any case lapses in July<strong>2014</strong>, at which point EPA will need to take some action on how biogenic CO 2 will be regulated. Inthe meantime, it is unclear whether the court will issue a mandate that directs EPA to reverse itspolicy and officially declare that facilities that are major sources for CO 2 need to go through PSD,although in any case EPA could take action without waiting for the court’s mandate. When and ifthis happens, some bioenergy facility permits that were issued under the exemption could be reopenedand re-permitted through the PSD process. Meanwhile, there are about 60 bioenergyfacilities currently planned or under construction in the U.S. 33 that are over 8 MW in capacity, theapproximate threshold for a major source for CO 2 emissions. By allowing these facilities to escapePSD permitting, EPA’s exemption for bioenergy CO 2 regulation allows the bioenergy capacity “inthe pipeline” to be far more polluting than it needs to be.Loophole 3: State regulators help biomass power plants avoid more protectivepermittingBioenergy developers usually want to avoid going through the PSD process, because conducting aBACT analysis and air quality impacts modeling, determining effective pollution controls, anddealing with public involvement can increase the risk that a high-emitting facility will face more31Center for Biological Diversity v. EPA, D.C. Cir. No. 11-1101, July 12, 201332The D.C. Circuit Court essentially refrained from acting while a number of industry challenges to the Tailoring Rule itself areproceeding in the U.S. Supreme Court. Those challenges—which will determine whether the PSD program applies togreenhouse gases as a whole, not just biogenic CO 2 —are being heard by the Supreme Court in February, with a decisionexpected in mid-<strong>2014</strong>.33Forisk, Wood Bioenergy US database, December, 201324
scrutiny and questions. State permitting agencies usually help bioenergy developers avoid PSDpermitting, and “PSD avoidance” is a common phrase encountered in bioenergy air permits.A facility’s status as a major or minor source is determined by its potential to emit (PTE). Thisis the number of tons of a pollutant that the facility will emit if it is operated year-round, at fullboiler capacity. It is calculated asEquation 1To avoid PSD permitting, the biomass industry avails itself of another loophole in the Clean Air Actknown as the “synthetic” minor source provision, whereby if facility caps its emissions below 250tons of each criteria pollutant per year, it can avoid the PSD permitting process and itsrequirements for a BACT analysis, air quality modeling, and public involvement. States routinelyallow and even encourage facilities to avoid PSD permitting by issuing air permits that capemissions just below 250 tons – even, sometimes, when the facility’s potential to emit exceeds 250tons. Such permits frequently include credulity-straining provisions that limit a facility’s emissionsto 249 tons of a pollutant, as we discuss below (see Tables 4 and 5).The 250-ton cap for emissions in a syntheticminor permit is supposed to include all annualemissions from the facility, including startup andshutdown emissions from the boiler andemissions from other sources, such as emergency“Synthetic minor” facilities avoid settingemissions rates, conducting air qualitymodeling, or using best available controltechnology.generators. However, it is rare that a synthetic minor permit does a full accounting of all theemissions at a facility, or includes enforceable limits that can truly constrain facility-wide emissionsonce the plant is operating. As we discuss below, such permits unenforceable and thus illegal underthe Clean Air Act, but because the EPA rarely reviews state-issued permits, federal enforcement israre.For a number of the synthetic minor permits we reviewed, the biomass boilers alone have a PTEthat exceeds 250 tons of a criteria pollutant, given the size of the unit and the ability to controlemissions. This would suggest that the 250-ton-per-year caps, which are required by federal law tobe “federally and practically enforceable,” 34 for instance by limiting the number of hours in a yearthat a facility can operate, are in some (or perhaps many) cases unrealistic. In fact, in our review oftens of biomass power plant permits, very few of the synthetic minor sources we found had anylimits on hours of operation, or any other limitations. Instead, state air permitting agencies simplyrequire facilities to install continuous emissions monitors (CEMs) that track how much pollution isproduced, and to report these emissions, as proof that they are emitting less than 250 tons per yearof each pollutant. The presence of a CEMs has been accepted as sufficient assurance that the caps34 The Clean Air Act requires that “limitations, controls and requirements in operating permits are quantifiable andotherwise enforceable as a practical matter” 60 Fed. Reg. 45049 (August 30, 1995).25
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company was permitted to use non-EP
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