80 FR 8023 - Receipt of Approval Requests for the Operation of Pressure-Assisted Multi-Point Ground Flare Technology
ENVIRONMENTAL PROTECTION AGENCY Federal Register Volume 80, Issue 30 (February 13, 2015)
Federal Register Volume 80, Issue 30 (February 13, 2015)
| Page Range | 8023-8030 | |
| FR Document | 2015-03064 |
[Federal Register Volume 80, Number 30 (Friday, February 13, 2015)] [Proposed Rules] [Pages 8023-8030] From the Federal Register Online [www.thefederalregister.org] [FR Doc No: 2015-03064] ----------------------------------------------------------------------- ENVIRONMENTAL PROTECTION AGENCY 40 CFR Parts 60, 61, and 63 [EPA-HQ-OAR-2014-0738; FRL 9922-91-OAR] Receipt of Approval Requests for the Operation of Pressure- Assisted Multi-Point Ground Flare Technology AGENCY: Environmental Protection Agency. ACTION: Request for comments. ----------------------------------------------------------------------- [[Page 8024]] SUMMARY: On August 5, 2014, The Dow Chemical Company (Dow) requested an Alternative Means of Emission Limitation (AMEL) under the Clean Air Act (CAA) in order to operate pressure-assisted multi-point ground flares at its Propane Dehydrogenation Plant and its Light Hydrocarbons Plant at its Texas Operations site located in Freeport, Texas. On October 21, 2014, ExxonMobil Chemical Company (ExxonMobil) requested an AMEL under the CAA for its pressure-assisted multi-point ground flares at its' Olefins Plant in Baytown, Texas, and its' Plastics Plant in Mont Belvieu, Texas. In this document, the Environmental Protection Agency (EPA) is soliciting comment on all aspects of the AMEL requests and the resulting alternative operating conditions that are necessary to achieve a reduction in emissions of volatile organic compounds (VOC) and hazardous air pollutants (HAPs) at least equivalent to the reduction in emissions required by various standards in 40 CFR parts 60, 61 and 63 that apply to emission sources controlled by these pressure-assisted multi-point ground flares. These standards point to the operating requirements for flares in the General Provisions to parts 60 and 63, respectively, to comply with the emission reduction requirements. Because pressure-assisted multi-point ground flares cannot meet the velocity requirements in these General Provisions, Dow and ExxonMobil are seeking an AMEL. DATES: Comments. Written comments must be received on or before March 30, 2015. Public Hearing. If requested by February 18, 2015, we will hold a public hearing on March 2, 2015, from 1:00 p.m. [Eastern Standard Time] to 5:00 p.m. [Eastern Standard Time] at EPA's Campus located in Research Triangle Park, NC. We will provide details on the public hearing on our Web site at: http://www.epa.gov/ttn/atw/groundflares/groundflarespg.html. To be clear, a public hearing will not be held unless someone specifically requests that the EPA hold a public hearing regarding these requests. Please contact Ms. Virginia Hunt of the Sector Policies and Programs Division (E143-01), Office of Air Quality Planning and Standards, Environmental Protection Agency, Research Triangle Park, NC 27711; telephone number: (919) 541-0832; email address: [email protected]; to request a public hearing, to register to speak at the public hearing or to inquire as to whether or not a public hearing will be held. The last day to pre-register in advance to speak at the public hearing will be February 25, 2015. ADDRESSES: Submit your comments, identified by Docket ID No. EPA OAR- 2014-0738, by one of the following methods:http://www.regulations.gov. Follow the on-line instructions for submitting comments. Email: [email protected]. Attention Docket ID Number EPA-HQ-OAR-2014-0738. Fax: (202) 566-9744. Attention Docket ID Number EPA-HQ- OAR-2014-0738. Mail: U.S. Postal Service, send comments to: EPA Docket Center (EPA/DC), Attention Docket ID Number EPA-HQ-OAR-2014-0738, U.S. Environmental Protection Agency, Mailcode: 28221T, 1200 Pennsylvania Ave. NW., Washington, DC 20460. Hand Delivery: U.S. Environmental Protection Agency, EPA WJC West Building, Room 3334, 1301 Constitution Ave. NW., Washington, DC 20004. Attention Docket ID Number EPA-HQ-OAR-2014-0738. Such deliveries are only accepted during the Docket's normal hours of operation, and special arrangements should be made for deliveries of boxed information. Instructions. Direct your comments to Docket ID Number EPA-HQ-OAR- 2014-0738. The EPA's policy is that all comments received will be included in the public docket without change and may be made available online at http://www.regulations.gov, including any personal information provided, unless the comment includes information claimed to be confidential business information (CBI) or other information whose disclosure is restricted by statute. Do not submit information that you consider to be CBI or otherwise protected through http://www.regulations.gov or email. The http://www.regulations.gov Web site is an ``anonymous access'' system, which means the EPA will not know your identity or contact information unless you provide it in the body of your comment. If you send an email comment directly to the EPA without going through http://www.regulations.gov, your email address will be automatically captured and included as part of the comment that is placed in the public docket and made available on the Internet. If you submit an electronic comment, the EPA recommends that you include your name and other contact information in the body of your comment and with any disk or CD-ROM you submit. If the EPA cannot read your comment due to technical difficulties and cannot contact you for clarification, the EPA may not be able to consider your comment. Electronic files should not include special characters or any form of encryption and be free of any defects or viruses. For additional information about the EPA's public docket, visit the EPA Docket Center homepage at: http://www.epa.gov/dockets. Docket. The EPA has established a docket for this rulemaking under Docket ID Number EPA-HQ-OAR-2014-0738. All documents in the docket are listed in the regulations.gov index. Although listed in the index, some information is not publicly available, e.g., CBI or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the Internet and will be publicly available only in hard copy. Publicly available docket materials are available either electronically in regulations.gov or in hard copy at the EPA Docket Center (EPA/DC), EPA WJC West Building, Room 3334, 1301 Constitution Ave. NW., Washington, DC. The Public Reading Room is open from 8:30 a.m. to 4:30 p.m., Monday through Friday, excluding legal holidays. The telephone number for the Public Reading Room is (202) 566-1744, and the telephone number for the EPA Docket Center is (202) 566-1742. FOR FURTHER INFORMATION CONTACT: For questions about this proposed action, contact Ms. Brenda Shine, Sector Policies and Programs Division (E143-01), Office of Air Quality Planning and Standards (OAQPS), U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711; telephone number: (919) 541-3608; fax number: (919) 541-0246; and email address: [email protected]. SUPPLEMENTARY INFORMATION: Acronyms and Abbreviations We use multiple acronyms and terms in this document. While this list may not be exhaustive, to ease the reading of this document and for reference purposes, the EPA defines the following terms and acronyms here: AMEL alternative means of emission limitation BOP Baytown Olefins Plant Btu/scf British thermal units per standard cubic feet LFL lower flammability limit LFLcz combustion zone lower flammability limit LHC Light Hydrocarbons Unit LRGO Linear relief gas oxidizer MACT maximum achievable control technology MBPP Mont Belvieu Plastics Plant MPGF multi-point ground flare NESHAP national emission standard for hazardous air pollutants [[Page 8025]] NHV net heating value NHVcz combustion zone net heating value NSPS new source performance standards OAQPS Office of Air Quality Planning and Standards PDH Propylene Dehydrogenation Unit PFTIR passive fourier transform infrared SKEC steam-assisted kinetic energy combustor Organization of This Document. The information in this document is organized as follows: I. Statutory and Regulatory Background A. Flare Operating Requirements B. Alternative Means of Emission Limitation II. Requests for Alternative Means of Emission Limitation A. Dow AMEL B. ExxonMobil AMEL C. EPA's Analysis of MPGF Burner Emission Tests III. AMEL for Pressure-Assisted MPGF IV. Request for Comments I. Statutory and Regulatory Background A. Flare Operating Requirements In their requests, Dow and ExxonMobil cite various regulatory requirements in 40 CFR parts 60, 61 and 63 that will apply to the different vent gas streams that will be collected and routed to their pressure-assisted multi-point ground flares (MPGF) at each plant. These requirements are included in Table 1.\1\ In all cases, these rules reference the flare operating requirements located in 40 CFR 60.18 and 40 CFR 63.11. --------------------------------------------------------------------------- \1\ EPA prepared Table 1 using the information provided in the requests, corrected as appropriate based on its own review of the regulations. However, the EPA has not independently verified whether Table 1 includes all of the regulatory requirements with which these plants must comply. Table 1--Summary of Applicable Rules That May Apply to Vents Streams Controlled by Pressure-Assisted Multi-Point Ground Flares -------------------------------------------------------------------------------------------------------------------------------------------------------- Provisions for Applicable rules with vent Dow propane Dow light hydro- Exxon-Mobil Exxon-Mobil Mont Emission reduction alternative means streams going to control dehydrogenation carbons (LHC) Baytown Olefins Belvieu plastics required and of emission device (PDH) plant plant plant plant rule citation limitation -------------------------------------------------------------------------------------------------------------------------------------------------------- NSPS Subpart Kb................. .................. X X .................. 60.112b(a)(3)(ii)- 60.114b allows for -Reduce VOC inlet AMEL. emissions by 95%; If a flare is used as a control device, flare must meet requirements of 60.18. NSPS Subparts VV/Vva............ X X X .................. 60.482-10a--Reduce 60.484(a) allows VOC emissions by for AMEL 95% or greater; flare used to comply with subpart must meet requirements of 60.18. *Note--Under Dow PDH Plant column, NSPS subpart VVa applies, but DOW is opting to comply with 40 CFR part 63, subpart H (as referenced by Miscellaneous Organic NESHAP(MON) which should satisfy requirements in subpart VVa. NSPS Subpart DDD................ .................. .................. .................. X 60.562-1--Reduce CAA section emissions of 111(h)(3) allows Total Organic for AMEL. Carbon (TOC) by 98%, or combust in a flare that meets the requirements of 60.18. NSPS Subpart NNN................ X X X X 60.662- Reduce CAA section emissions of TOC 111(h)(3) allows by 98%, or for AMEL. combust in a flare that meets the requirements of 60.18. NSPS Subpart RRR................ X X X X 60.702--Reduce CAA section emissions of TOC 111(h)(3) allows by 98%, or for AMEL. combust in a flare that meets the requirements of 60.18. [[Page 8026]] NESHAP Subpart V................ .................. .................. X .................. 61.242-11(d)--flar 61.244 allows for es used to comply AMEL; also see with subpart V 61.12(d). must comply with 60.18. NESHAP Subpart FF............... .................. X X .................. 61.349(a)--reduce 61.353 allows for organic emissions AMEL; also see vented to control 61.12(d). device by 95%; a flare shall comply with the requirements of 60.18. NESHAP Subparts F, G............ .................. .................. X .................. 63.102, 63.113, 63.102(b) allows 63.126--Reduce for AMEL. emissions of Total Organic HAP (TOHAP) by 98%, or combust in a flare that meets the requirements of 63.11(b). 63.120--Combust in flare meeting 63.11. 63.139-- Reduce emissions of TOHAP by 95%, or combust in a flare that meets the requirements of 63.11(b). 63.145(j)--Points to sections of 63.11(b) for flare control. NESHAP Subpart H................ X .................. X .................. 63.172--Reduce 63.177 allows for organic HAP or AMEL. VOC by 95%; flares used to comply must meet requirements of 63.11(b). NESHAP Subpart SS............... X X X X 63.982(b) and CAA section 63.987(a) require 112(h)(3) allows that a flare for AMEL. meets the requirements in 63.11(b). NESHAP Subpart UU............... .................. X .................. .................. 63.1034--Nonflare 63.1021 allows for control devices AMEL. shall reduce emissions by 95%; flares shall comply with subpart SS. NESHAP Subpart XX............... .................. X .................. .................. 63.1091 requires 61.353 allows for compliance with AMEL; also see subpart FF, which 61.12(d). requires compliance with 60.18. NESHAP Subpart YY............... .................. X X .................. Table 7 references 63.1113 allows for subpart SS, which AMEL. requires compliance with 60.18. NESHAP Subpart EEEE............. .................. .................. X X 63.2378(a) 63.2346(g) allows references for AMEL; also subpart SS, which see Table 12 requires which makes compliance with 63.6(g) 60.18. applicable to this subpart. [[Page 8027]] NESHAP Subpart FFFF............. X .................. .................. X 63.2450 requires 63.2540 and Table compliance with 12 allow for AMEL limits in Tables by making 63.6(g) 1-7, which applicable to include reducing this subpart. total organic HAP in vent streams by either 95% or 98%, and provide an option for control using a flare meeting requirements of 63.982(b) which requires meeting 63.987, which requires a flare to meet the requirements of 63.11(b). -------------------------------------------------------------------------------------------------------------------------------------------------------- As shown in Table 1, the applicable rules require that control devices achieve destruction efficiencies of either 95 percent or 98 percent either directly, or by reference, or allow control by flares meeting the flare operating requirements in 40 CFR 60.18 or 63.11. The flare operating requirements in 40 CFR 60.18 and 63.11 specify that flares shall be: (1) Steam-assisted air-assisted, or non-assisted; \2\ (2) operated at all times when emissions may be vented to them; (3) designed for and operated with no visible emissions (except for periods not to exceed a total of 5 minutes during any 2 consecutive hours); and (4) operated with the presence of a pilot flame at all times. The flare operating requirements in 40 CFR 60.18 and 63.11 also specify requirements for both the minimum heat content of gas combusted in the flare and the maximum exit velocity at the flare tip.\3\ These provisions specify maximum flare tip velocities based on flare type (non-assisted, steam-assisted or air-assisted) and the net heating value of the flare vent gas (see 40 CFR 60.18(c)(3), 63.11(b)(6)). These maximum flare tip velocities are required to ensure that the flame does not ``lift off'' or separate from the flare tip, which could cause flame instability and/or potentially result in a portion of the flare gas being released without proper combustion. Proper combustion for flares is considered to be 98 percent destruction efficiency or greater for HAPs and VOCs, as discussed in our recent proposal titled ''Petroleum Refinery Sector Risk and Technology Review and New Source Performance Standards,'' 79 FR 36,880, 36,904-36,912 (June 30, 2014). --------------------------------------------------------------------------- \2\ While Dow and ExxonMobil describe their flares as ``pressure-assisted,'' these flares qualify as ``non-assisted'' flares under 40 CFR 60.18(b) or 63.11(b) because they do not employ assist gas. \3\ These requirements are not all inclusive. There are other requirements in 40 CFR 60.18 and 63.11 relating to monitoring and testing that are not described here. --------------------------------------------------------------------------- The MPGF proposed by both Dow and ExxonMobil are conceptually similar yet inherently different in both flare head design and operation than the more traditional steam-assisted, air-assisted and non-assisted flare types currently able to comply with the flare operating requirements in 40 CFR 60.18 or 63.11. The MPGF technology operates by using the pressure upstream of each individual flare tip burner to enhance mixing with air at the flare tip due to high exit velocity, which allows the MPGF to operate with smokeless burning. The MPGF are constructed differently than normal elevated flares in that they consist of many rows of individual flare tips which are approximately 8 feet above ground level. The ground flare staging system opens and closes staging valves according to gas pressure such that stages containing multiple burners are activated as the flow and pressure increase or decrease in the header. While information supplied by Dow, and relied on by both Dow and ExxonMobil, indicates that the flare tips operate smokelessly and achieve high destruction efficiencies, the MPGF cannot meet the exit velocity requirements in 40 CFR 60.18 and 40 CFR 63.11, which limit the exit velocity at the flare tip to a maximum of 400 feet per second. The exit velocities from MPGF typically range from 600 feet per second up to sonic velocity (which ranges from 700 to 1,400 feet per second for common hydrocarbon gases), or Mach =1 conditions. As a result, Dow and ExxonMobil are seeking an alternative means of complying with the flare operating requirements in 40 CFR 60.18 and 63.11; specifically, the exit velocity requirements in 40 CFR 60.18(c)(3), (c)(4), and (c)(5) and in 40 CFR 63.11(b)(6),(b)(7) and (b)(8). B. Alternative Means of Emission Limitation As noted in Table 1, the specific rules in 40 CFR parts 60, 61 and 63, or the General Provisions for parts 60, 61 and 63 of the CAA \4\ allow a facility to request an AMEL. These provisions allow the Administrator to permit the use of an alternative means of complying with an applicable standard, if the requestor demonstrates that the alternative achieves at least an equivalent reduction in emissions. The EPA must provide notice of the request and an opportunity for a public hearing on the request. After considering comments received, the EPA will issue a notice permitting the use of an [[Page 8028]] alternative means of emission limitation, if the Administrator determines that the alternative will achieve an equivalent reduction in emissions. --------------------------------------------------------------------------- \4\ CAA section 111(h)(3) states: ``If after notice and opportunity for public hearing, any person establishes to the satisfaction of the Administrator that an alternative means of emission limitation will achieve a reduction in emissions of any air pollutant at least equivalent to the reduction in emissions of such air pollutant achieved under the requirements of paragraph (1), the Administrator shall permit the use of such alternative by the source for purposes of compliance with this section with respect to such pollutant.'' Section 112(h)(3) contains almost identical language. --------------------------------------------------------------------------- II. Requests for Alternative Means of Emission Limitation A. Dow AMEL In its August 5, 2014, request, Dow indicates that it plans to construct and operate two new MPGFs at its Texas Operations site in Freeport, TX. One MPGF would be located at Dow's Propane Dehydrogenation Plant (PDH-1), scheduled to start-up in early 2015 and whose primary product is propylene. The other MPGF would be located at Dow's Light Hydrocarbons Plant (LHC-9), scheduled to start-up in early 2017 and whose primary product is ethylene. The flare systems proposed for use by Dow at both plants consist of a staged design concept. The first stage, which is not at issue nor specifically part of the notice requesting an AMEL because it can meet the flare operating requirements of 40 CFR of 60.18 and 63.11, is a steam-assisted ground flare which has the primary function of controlling waste gases during periods of normal operation. The remaining stages consist of arrays of pressure-assisted flare tips (the MPGFs) and will control waste gases during periods of upset, maintenance, startup and shutdown (high-pressure, high flow periods). Pressure-assisted flares are also known as sonic flares because the exit velocity during periods of high-pressure feeds is at sonic velocities. At Dow, Stage 1 is the low pressure stage in which the flare acts as a steam-assisted flare. Stages 2 and beyond are activated for high- pressure/high exit velocity flows. The flare system is surrounded by a panel type fence to protect nearby workers from the radiant heat from the flare system. At various times ranging from 2 hours for startup of processing equipment to 160 hours for a complete plant shutdown, Dow will have emissions from the MPGF for the following maintenance, start- up and shutdown (MSS) activities: Perform plant start-up and shutdown, process equipment startup and shutdown, off-spec flaring, non-routine clearing and commissioning of process equipment and piping, fuel purging and flaring to maintain pressure of the net-gas system. Dow conducted testing on the two types of individual flare tips in its MPGF design to demonstrate that the MPGF can achieve good combustion efficiency under certain conditions and has proposed operating requirements for these MPGF that can achieve the emissions standards in the applicable NSPS and NESHAP. These proposed operating requirements are contained in Dow's request dated August 5, 2014, located in the docket for this document. A summary of test data and a complete copy of the emission testing report and appendices are available in the docket. The tests were conducted on individual flare tips because it is not possible to test the full field of MPGF because of the size and configuration of the full-scale MPGF installation (there are approximately 300 flare tips in the proposed array pattern that cover the size approximately equivalent to that of a football field in the actual installations). Although two flare tip types were tested during the effort, the results of one burner type, a steam- assisted flare burner, John Zink model SKEC, are not discussed further as Dow is not seeking an AMEL for this burner because it operates at lower velocity and, thus, can meet the existing flare operating requirements. B. ExxonMobil AMEL In its October 21, 2014, request, ExxonMobil indicates it plans to construct and operate two MPGFs, one at its Baytown Olefins Plant (BOP) in Baytown, TX, and the other at its Mont Belvieu Plastics Plant (MBPP) in Mont Belview, TX. Both of the proposed control strategies will be designed such that vent gases are routed to either a low pressure system, or in infrequent cases where high-pressure/high flow events occur, the high pressure MPGF. Both low pressure control systems at the BOP and MBPP consist of an elevated flare, but the MBPP low pressure control system also consists of three flameless thermal oxidizers. The elevated flares at both the BOP and MBPP will comply with 40 CFR 60.18 and/or 40 CFR 63.11, as applicable. ExxonMobil did not supply any additional test data, but rather is relying on a series of publically available MPGF emissions tests, among them the 2013 test submitted by Dow, a 2012 test done by Marathon Petroleum Corporation, LP, a 2006 pipeline burner test done by Dow, and two earlier tests conducted by the EPA in the 1980s. ExxonMobil indicates that the BOP and MBPP burner tip designs will have comparable performance to the burners recently tested and submitted December 14, 2014, supplemental application containing additional information on plans to use the John Zink LRGO burners for the MPGF installation at the MBPP, and ZEECO burners at the BOP. ExxonMobil asserts that the ZEECO burner design provides equivalent combustion efficiency and flame stability as that of the John Zink burners tested, although ExxonMobil has not supplied any data or information that could confirm this assertion of equivalency. We are requesting comment on this assertion as well as specifically soliciting data and comments from the public on burner design and performance of these MPGF burners. C. EPA's Analysis of MPGF Burner Emission Tests Dow and ExxonMobil are proposing to follow all of the flare operating requirements contained in either 40 CFR 60.18 or 63.11, except for the exit velocity requirements. They are proposing to operate their high pressure MPGFs at higher velocity than the current requirements because their data indicate that these burners can operate with a stable flame at higher velocities and still achieve good combustion and destruction efficiencies. Instead of complying with the exit velocity requirements in 40 CFR 60.18 and 63.11, Dow and ExxonMobil are requesting that EPA grant their AMEL requests to allow them to operate the high pressure sections of their MPGFs such that the vent gas flowing to the flare tips is maintained with a net heating value that has been demonstrated to be equal to or greater than the values that were determined to achieve a reduction in emissions of pollutants being controlled by a steam-assisted, air-assisted or non- assisted flare complying with the requirements of either 40 CFR 63.11(b) or 40 CFR 60.18(b) during the burner emission tests. In the emission tests, the high pressure burners were subjected to a number of different operating conditions, and each set of conditions represented a separate test series. For purposes of this discussion, the relevant test results are those from Dow's 2013 test report, which are comprised of runs from test series P1 through P4 and were tested on John Zink's pressure assisted flare burner model LRGO-HC, as well as emissions data reported in Marathon's 2012 test report, which are from test series PA1 and PA2 and were tested on John Zink's pressure assisted flare burner model LRGO-D. These tests used the analytical technique of passive fourier transform infrared (PFTIR) spectroscopy to assess combustion efficiency. Dow's 2013 test report also presents data collected using an extractive method where flue gas was extracted from a collection hood that was suspended above the burner tip and analyzed using standard EPA methods. [[Page 8029]] The Marathon 2012 test report (see ``Performance Test of Steam-Assisted and Pressure-Assisted Ground Flare Burners with Passive FTIR-- Garyville'') and the Dow 2013 test report (see ``Report on Emissions Testing of Pressure Assisted LRGO-HC and Steam Assisted SKEC Burners'') are provided in the docket. The results of the PFTIR testing indicated that when a flame was present on the pressure-assisted flare burners tested that an average combustion efficiency of 99 percent or greater was always achieved. Each set of operating conditions tested by both Dow and Marathon for both combustion efficiency and flame stability generally consisted of a series of triplicate runs. In all, a total of 34 test runs were analyzed from these two tests (21 from Dow's P1 through P3 test series and 13 from Marathon's PA1 and PA2 test series). For test series P4, which was conducted as part of Dow's 2013 test using a 90 volume percent hydrogen/10 volume percent natural gas mixture, no combustion efficiency test was conducted; instead, a qualitative indication that the flame was stable at the conditions tested was made. We note that in Dow's 2013 test report that three of the 21 test runs were aborted because of loss of flame (which we refer to as flameout); only two of the three test runs (one in the P2H series and one in the P2L series) produced enough information before flameout to be analyzed in more detail. We requested more detailed information from Dow on the conditions that resulted in this loss of flame as it informs us of the conditions that would create a failure of the burners to sustain a stable flame and achieve good combustion. This document is included in the docket titled ``Supplement 1 to Dow report.'' Additionally, we also note that in Marathon's 2012 test report that two of the 13 test runs also experienced loss of flame (test PA1 Runs 4(2) and 4(4)). The results of all of these test runs are discussed in the memorandum titled ``Review of Available Test Data on Multipoint Ground Flares,'' located in the docket. There are two general conclusions from these test reports that are consistent with the earlier EPA 1985 study done on pressure-assisted flares (see conclusions on pages 2-19 and 2-22 in September 1985 EPA report titled ``Evaluation of the efficiency of industrial flares: Flare head design and gas composition''). The first is that ``flare head design can influence the flame stability curve.'' This is evident in Figures 2-3 and 2-5 of the 1985 EPA report where different stability curves were generated for the different flare heads (burners) tested over a range of differing exit velocities and flare gas net heating values. When comparing the current maximum flare tip velocity requirements in the general provisions with those tested on pressure- assisted flare burners, this conclusion still holds true. The agency's current requirements would require that flares meet an increasing minimum net heating value with increasing velocity, all the way up to a minimum waste gas net heating value of 1,000 BTU/scf and maximum velocity of 400 feet per second. However, the recent test reports on pressure-assisted burners show that flame stability can be achieved at significantly higher velocities (i.e., sonic velocity) with waste gas net heating values below 1,000 BTU/scf. The second general conclusion made from EPA's 1985 study is that ``stable flare flames and high (>98- 99) combustion and destruction efficiencies are attained when flares are operated within operating envelopes specific to each flare burner and gas mixture tested. Operation beyond the edge of the operating envelope can result in rapid flame de-stabilization and a decrease in combustion and destruction efficiencies.'' The data where flameout of the burners occurred from test runs in both the Marathon 2012 test report and the Dow 2013 test report showed that the flare operating envelope was different for the different gas mixtures tested. Additionally, it was observed that combustion degradation beyond the edge of the operating envelope for pressure-assisted MPGF burners was so rapid that when a flame was present, the flare would still achieve a high level of combustion efficiency right up until the point of flameout. In order to assess the proper operating envelope for these flare types, the EPA evaluated both the net heating value (in BTU/scf), which is how the 40 CFR part 60 and 63 General Provisions currently address combustion zone properties, as well as the lower flammability limit (LFL) because the LFL may be a better indicator of performance than net heating value for some flare vent gas streams, notably those with the potential for high hydrogen content. Hydrogen is relatively flammable, but its net heating value is low on a BTU/scf basis when compared to other hydrocarbons. By using LFL, we eliminate the need to correct the hydrogen heat content or to select a lower BTU/scf limit for high hydrogen cases. Although Dow has requested operating limits in the form of BTU/scf and has presented the test data in BTU/scf, we believe it is important to consider both types of operating limits. Our review indicates that the LRGO burners tested achieve a high level of combustion efficiency when the lower flammability limit of waste gases burned in the flare is less than 6.5 volume percent (vol%) LFL or above 800 BTU/scf. We suggest the 6.5 vol% LFL based on the flammability of the stream during the flame out conditions experienced during the high pressure test run P2H1 (at 6.6 vol% LFL). The corresponding BTU content of the waste gas at this value was 789 BTU/ scf (according to Dow, the gas chromatograph analysis indicated this value was 746 BTU/scf, although the John Zink report based on measured flow rates indicated it was 789 BTU/scf). Dow's proposed operating conditions included startup/shutdown cases where the waste gas heat content could be as low as 690 BTU/scf and as high as 6.9 vol% LFL, and data from these tests indicate that good combustion can occur at these conditions. However, to establish the alternative operating requirements at a level that ensures good combustion and flame stability at all times under all operating conditions, we believe it is reasonable to establish the heat content requirements for BTU/scf above which there were no flame out observations. For LFL, that level would be set below which there are no flame out observations. This is because gas mixtures with a relatively high LFL are less flammable when released to the air than mixtures with a relatively low LFL. A gas mixture with a relatively high LFL requires a larger volume of the mixture to burn in a specific volume of air, than would a mixture of gases with a relatively low LFL being combusted in that same volume of air. We believe the flame out observations establish the limiting case because a flameout is a complete failure of the burner, indicating zero-percent combustion. Because of the quantity of waste gases potentially flared in the high-pressure zones of these MPGF, we believe it would be prudent to establish limits on the conservative side to prevent air emissions of unburned waste gas. We also reviewed whether we should consider velocity or burner operating pressure in describing conditions that should be met during the MPGF operation and whether we should require some testing to ensure that the individual burners will ignite properly when a new stage goes into service. Dow provided information on its process control system and indicated that cross-light testing (testing of burner ignition from pilots) of individual burners at its off-site test facility has been conducted [[Page 8030]] and the burners performed as expected. This discussion, titled ``Process control system overview-multipoint ground flare system,'' is in the docket for this action. At this time, we are not considering any requirements for additional process control or ignition testing. However, we believe it would be important to require that cameras are installed and operated such that operators have a visual indication of flames from the flare at all times that the MPGF is operating and that this footage be available for inspection by the permitting agency, along with operational records of the waste gas flowrate, pressure in header and stages, pilot and waste gas composition. Because these flares are located at ground level, it is possible that ambient concentrations of pollutants could be higher than they would be under an alternative scenario where waste gases would be flared in an elevated flare, enabling greater dispersion and potentially lessening the impact to neighboring communities. To that end, we are soliciting comment on whether additional ambient monitoring is warranted to provide for immediate notification to emergency planning officials and the community during significant events and malfunctions of the system. III. AMEL for Pressure-Assisted MPGF Considering the above requests from both Dow and ExxonMobil, we are seeking the public's input on the operating requirements for the proposed pressure-assisted MPGFs that would be used by both companies which would establish an AMEL that will achieve a reduction in emissions at least equivalent to the reduction in emissions being controlled by a steam-assisted, air-assisted or non-assisted flare complying with the requirements of either 40 CFR 63.11(b) or 40 CFR 60.18(b). Information provided in the AMEL requests and the available emissions test data from the test reports described above indicate that the following list of operating requirements for pressure-assisted MPGF result in destruction efficiencies at least equivalent to destruction efficiencies expected from complying with the requirements of 40 CFR 63.11(b) and 40 CFR 60.18(b) for the pressure-assisted MPGF being proposed for use by both Dow and ExxonMobil: 1. The flare system must be designed and operated such that the net heating value of the combustion zone gas (NHV cz ) for the pressure assisted flare burners meets a minimum heating value of 800 BTU/scf or a lower flammability limit of the combustion zone gas (LFLcz ) of less than or equal to 6.5 percent by volume under all conditions. We would expect owners or operators to calculate NHVcz and LFLcz in a manner similar to those in the currently proposed requirements of 79 FR 36980-40 CFR 63.670(l)- (m). 2. The flare system must be operated with a flame present at all times when in use. Each row of flare burners must have at least one pilot with a constant pilot flame. The pilot flame(s) must be continuously monitored by a thermocouple. The time, date and duration of any loss of pilot flame must be recorded. Each monitoring device must be maintained or replaced at a frequency in accordance with the manufacturer's specifications. 3. The flare system must be operated with no visible emissions except for periods not to exceed a total of 5 minutes during any 2 consecutive hours. A video camera can be used in order to conduct visible emission observations since operating personnel cannot enter the fenced area while the MPGF is operating. 4. The operator must install and operate an on-line vent gas flow meter and an on-line gas chromatograph to measure the flow and composition of the vent gas to each flare. We would expect the operator to comply with similar monitoring and testing requirements and recordkeeping and reporting requirements for these monitoring systems as currently proposed in 79 FR 36980-40 CFR 63.670(i)-(j) and (l)-(m). 5. The operator should install and operate pressure and/or flow monitors on each stage of the flare. We would expect the operator to comply with similar applicable monitoring and testing requirements and recordkeeping and reporting requirements for these monitoring systems as currently proposed in 79 FR 36980-40 CFR 63.670(i). IV. Request for Comments We solicit comments on all aspects of these requests for an AMEL. We specifically seek comment regarding whether or not the potential alternative operating requirements listed in section III above would be adequate for ensuring that the MPGF will achieve good combustion at all times and enable the facilities to meet their applicable emission standards. Additionally, several other entities have indicated to us that they intend to make similar requests for the ability to operate pressure-assisted MPGFs. We are also soliciting comment on whether the requirements listed above, if followed by these other entities, could enable these other facilities to receive approval of their own AMELs. As noted in section II.B above, we also solicit comment and data on other pressure-assisted flare burner types. Commenters should include data or specific examples in support of their comments. Dated: February 3, 2015. Janet G. McCabe, Acting Assistant Administrator. [FR Doc. 2015-03064 Filed 2-12-15; 8:45 am] BILLING CODE 6560-50-P
![Federal Register / Vol. 80, No. 30 / Friday, February 13, 2015 / Proposed Rules 8023
TABLE 5—PM2.5 DESIGN VALUES—Continued
Year 2008–2010 2009–2011 2010–2012 2011–2013
North Birmingham ............................................................................................ 29 27 26 24
1997 Annual PM2.5 NAAQS: 15 μg/m3.
2006 24-hour PM2.5 NAAQS: 35 μg/m3.
Given the current PM2.5 EPA has preliminarily determined • is not a significant regulatory action
concentrations and downward trend of that Alabama’s November 14, 2014, SIP subject to Executive Order 13211 (66 FR
these concentrations in the Area and the revision, containing the noninterference 28355, May 22, 2001);
results of Alabama’s mobile source demonstration associated with the • is not subject to requirements of
modeling, EPA has preliminarily State’s request for the change of the Section 12(d) of the National
determined that a change to 9.0 psi RVP Federal RVP requirements is consistent Technology Transfer and Advancement
fuel in the Birmingham Area would not with the applicable provisions of the Act of 1995 (15 U.S.C. 272 note) because
interfere with maintenance of the 1997 CAA. EPA is not proposing action today application of those requirements would
Annual PM2.5 NAAQS or the 2006 24- to remove the Birmingham Area from be inconsistent with the CAA; and
hour PM2.5 NAAQS in the Area.11 the Federal 7.8 psi RVP requirement. • does not provide EPA with the
d. Noninterference Analysis for the 2010 Any such proposal will occur in a discretionary authority to address, as
NO2 NAAQS separate and subsequent rulemaking. appropriate, disproportionate human
health or environmental effects, using
On February 17, 2012, EPA VII. Statutory and Executive Order
practicable and legally permissible
designated all counties in Alabama as Reviews
methods, under Executive Order 12898
unclassifiable/attainment for the 2010 Under the CAA, the Administrator is (59 FR 7629, February 16, 1994).
NO2 NAAQS. See 77 FR 9532. Based on required to approve a SIP submittal that In addition, the SIP is not approved
the technical analysis in Alabama’s to apply on any Indian reservation land
complies with the provisions of the Act
November 14, 2014, SIP revision, the or in any other area where EPA or an
and applicable federal regulations. 42
potential increase in NOX emissions Indian tribe has demonstrated that a
U.S.C. 7410(k); 40 CFR 52.02(a). Thus,
associated with the change to 9.0 psi tribe has jurisdiction. In those areas of
in reviewing SIP submissions, EPA’s
RVP fuel in the Birmingham Area is Indian country, the rule does not have
role is to approve state choices,
approximately 24 tons during high tribal implications as specified by
provided that they meet the criteria of
ozone season. As discussed in section Executive Order 13175 (65 FR 67249,
the CAA. Accordingly, this proposed
V.a, above, the slight projected increase November 9, 2000) nor will it impose
action merely proposes to approve state
in mobile source NOX emissions due to substantial direct costs on tribal
law as meeting Federal requirements
the fuel switch will be negated by a governments or preempt tribal law.
decrease in tailpipe emissions due to and does not propose to impose
fleet turnover. Given the current additional requirements beyond those List of Subjects in 40 CFR Part 52
unclassifiable/attainment designation imposed by state law. For that reason,
this proposed action: Environmental protection, Air
and the results of Alabama’s mobile pollution control, Incorporation by
source modeling, EPA has preliminarily • Is not a significant regulatory action
subject to review by the Office of reference, Intergovernmental relations,
determined that a change to 9.0 psi RVP Nitrogen dioxide, Ozone, Particulate
fuel in the Birmingham Area would not Management and Budget under
Executive Orders 12866 (58 FR 51735, matter, Reporting and recordkeeping
interfere with maintenance of the 2010 requirements and Volatile organic
NO2 NAAQS in the Area. October 4, 1993) and 13563 (76 FR 3821,
January 21, 2011); compounds.
VI. Proposed Action Authority: 42 U.S.C. 7401 et seq.
• does not impose an information
EPA is proposing to approve the State collection burden under the provisions Dated: February 4, 2015.
of Alabama’s noninterference of the Paperwork Reduction Act (44 V. Anne Heard,
demonstration, submitted on November U.S.C. 3501 et seq.); Acting Regional Administrator, Region 4.
14, 2014, in support of the State’s
• is certified as not having a [FR Doc. 2015–02942 Filed 2–12–15; 8:45 am]
request that EPA change the Federal
significant economic impact on a BILLING CODE 6560–50–P
RVP requirements for the Birmingham
Area from 7.8 psi to 9.0 psi. substantial number of small entities
Specifically, EPA is proposing to find under the Regulatory Flexibility Act (5
U.S.C. 601 et seq.); ENVIRONMENTAL PROTECTION
that this change in the RVP
• does not contain any unfunded AGENCY
requirements for the Birmingham Area
will not interfere with attainment or mandate or significantly or uniquely
40 CFR Parts 60, 61, and 63
maintenance of any NAAQS or with any affect small governments, as described
other applicable requirement of the in the Unfunded Mandates Reform Act [EPA–HQ–OAR–2014–0738; FRL 9922–91–
of 1995 (Pub. L. 104–4);
wreier-aviles on DSK5TPTVN1PROD with PROPOSALS
CAA. OAR]
• does not have Federalism
11 EPA has also preliminarily determined that a
implications as specified in Executive Receipt of Approval Requests for the
change to 9.0 psi RVP fuel in the Birmingham Area Order 13132 (64 FR 43255, October 7, Operation of Pressure-Assisted Multi-
would not interfere with maintenance of the
Annual PM10 NAAQS of 150 mg/m3 given the 1999); Point Ground Flare Technology
results of Alabama’s mobile source modeling and • is not an economically significant AGENCY: Environmental Protection
the fact that the Area is currently attaining the PM10
standard. Because PM2.5 is a component of PM10,
regulatory action based on health or Agency.
this preliminary determination is further supported safety risks subject to Executive Order
ACTION: Request for comments.
by the downward trend in PM2.5 identified above. 13045 (62 FR 19885, April 23, 1997);
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![8024 Federal Register / Vol. 80, No. 30 / Friday, February 13, 2015 / Proposed Rules
SUMMARY: On August 5, 2014, The Dow in advance to speak at the public you for clarification, the EPA may not
Chemical Company (Dow) requested an hearing will be February 25, 2015. be able to consider your comment.
Alternative Means of Emission ADDRESSES: Submit your comments, Electronic files should not include
Limitation (AMEL) under the Clean Air identified by Docket ID No. EPA OAR– special characters or any form of
Act (CAA) in order to operate pressure- 2014–0738, by one of the following encryption and be free of any defects or
assisted multi-point ground flares at its methods: viruses. For additional information
Propane Dehydrogenation Plant and its • http://www.regulations.gov. Follow about the EPA’s public docket, visit the
Light Hydrocarbons Plant at its Texas the on-line instructions for submitting EPA Docket Center homepage at:
Operations site located in Freeport, comments. http://www.epa.gov/dockets.
Texas. On October 21, 2014, • Email: a-and-r-docket@epa.gov. Docket. The EPA has established a
ExxonMobil Chemical Company Attention Docket ID Number EPA–HQ– docket for this rulemaking under Docket
(ExxonMobil) requested an AMEL under OAR–2014–0738. ID Number EPA–HQ–OAR–2014–0738.
the CAA for its pressure-assisted multi- • Fax: (202) 566–9744. Attention All documents in the docket are listed
point ground flares at its’ Olefins Plant Docket ID Number EPA–HQ–OAR– in the regulations.gov index. Although
in Baytown, Texas, and its’ Plastics 2014–0738. listed in the index, some information is
Plant in Mont Belvieu, Texas. In this • Mail: U.S. Postal Service, send not publicly available, e.g., CBI or other
document, the Environmental comments to: EPA Docket Center (EPA/ information whose disclosure is
Protection Agency (EPA) is soliciting DC), Attention Docket ID Number EPA– restricted by statute. Certain other
comment on all aspects of the AMEL material, such as copyrighted material,
HQ–OAR–2014–0738, U.S.
is not placed on the Internet and will be
requests and the resulting alternative Environmental Protection Agency,
publicly available only in hard copy.
operating conditions that are necessary Mailcode: 28221T, 1200 Pennsylvania
Publicly available docket materials are
to achieve a reduction in emissions of Ave. NW., Washington, DC 20460.
available either electronically in
volatile organic compounds (VOC) and • Hand Delivery: U.S. Environmental
regulations.gov or in hard copy at the
hazardous air pollutants (HAPs) at least Protection Agency, EPA WJC West
EPA Docket Center (EPA/DC), EPA WJC
equivalent to the reduction in emissions Building, Room 3334, 1301 Constitution
West Building, Room 3334, 1301
required by various standards in 40 CFR Ave. NW., Washington, DC 20004.
Constitution Ave. NW., Washington,
parts 60, 61 and 63 that apply to Attention Docket ID Number EPA–HQ–
DC. The Public Reading Room is open
emission sources controlled by these OAR–2014–0738. Such deliveries are
from 8:30 a.m. to 4:30 p.m., Monday
pressure-assisted multi-point ground only accepted during the Docket’s
through Friday, excluding legal
flares. These standards point to the normal hours of operation, and special
holidays. The telephone number for the
operating requirements for flares in the arrangements should be made for
Public Reading Room is (202) 566–1744,
General Provisions to parts 60 and 63, deliveries of boxed information.
and the telephone number for the EPA
respectively, to comply with the Instructions. Direct your comments to
Docket Center is (202) 566–1742.
emission reduction requirements. Docket ID Number EPA–HQ–OAR–
FOR FURTHER INFORMATION CONTACT: For
Because pressure-assisted multi-point 2014–0738. The EPA’s policy is that all
comments received will be included in questions about this proposed action,
ground flares cannot meet the velocity
the public docket without change and contact Ms. Brenda Shine, Sector
requirements in these General Policies and Programs Division (E143–
Provisions, Dow and ExxonMobil are may be made available online at
http://www.regulations.gov, including 01), Office of Air Quality Planning and
seeking an AMEL. Standards (OAQPS), U.S.
any personal information provided,
DATES: Comments. Written comments unless the comment includes Environmental Protection Agency,
must be received on or before March 30, information claimed to be confidential Research Triangle Park, North Carolina
2015. business information (CBI) or other 27711; telephone number: (919) 541–
Public Hearing. If requested by information whose disclosure is 3608; fax number: (919) 541–0246; and
February 18, 2015, we will hold a public restricted by statute. Do not submit email address: shine.brenda@epa.gov.
hearing on March 2, 2015, from 1:00 information that you consider to be CBI SUPPLEMENTARY INFORMATION:
p.m. [Eastern Standard Time] to 5:00 or otherwise protected through http:// Acronyms and Abbreviations
p.m. [Eastern Standard Time] at EPA’s www.regulations.gov or email. The
We use multiple acronyms and terms
Campus located in Research Triangle http://www.regulations.gov Web site is
in this document. While this list may
Park, NC. We will provide details on the an ‘‘anonymous access’’ system, which
not be exhaustive, to ease the reading of
public hearing on our Web site at: means the EPA will not know your
this document and for reference
http://www.epa.gov/ttn/atw/ identity or contact information unless
purposes, the EPA defines the following
groundflares/groundflarespg.html. To be you provide it in the body of your
terms and acronyms here:
clear, a public hearing will not be held comment. If you send an email
unless someone specifically requests comment directly to the EPA without AMEL alternative means of emission
that the EPA hold a public hearing going through http:// limitation
BOP Baytown Olefins Plant
regarding these requests. Please contact www.regulations.gov, your email Btu/scf British thermal units per standard
Ms. Virginia Hunt of the Sector Policies address will be automatically captured cubic feet
and Programs Division (E143–01), Office and included as part of the comment LFL lower flammability limit
wreier-aviles on DSK5TPTVN1PROD with PROPOSALS
of Air Quality Planning and Standards, that is placed in the public docket and LFLcz combustion zone lower flammability
Environmental Protection Agency, made available on the Internet. If you limit
Research Triangle Park, NC 27711; submit an electronic comment, the EPA LHC Light Hydrocarbons Unit
telephone number: (919) 541–0832; recommends that you include your LRGO Linear relief gas oxidizer
email address: hunt.virginia@epa.gov; to name and other contact information in MACT maximum achievable control
technology
request a public hearing, to register to the body of your comment and with any MBPP Mont Belvieu Plastics Plant
speak at the public hearing or to inquire disk or CD–ROM you submit. If the EPA MPGF multi-point ground flare
as to whether or not a public hearing cannot read your comment due to NESHAP national emission standard for
will be held. The last day to pre-register technical difficulties and cannot contact hazardous air pollutants
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![8030 Federal Register / Vol. 80, No. 30 / Friday, February 13, 2015 / Proposed Rules
and the burners performed as expected. volume under all conditions. We would of their own AMELs. As noted in
This discussion, titled ‘‘Process control expect owners or operators to calculate section II.B above, we also solicit
system overview-multipoint ground NHVcz and LFLcz in a manner similar to comment and data on other pressure-
flare system,’’ is in the docket for this those in the currently proposed assisted flare burner types. Commenters
action. At this time, we are not requirements of 79 FR 36980–40 CFR should include data or specific
considering any requirements for 63.670(l)–(m). examples in support of their comments.
additional process control or ignition 2. The flare system must be operated Dated: February 3, 2015.
testing. However, we believe it would be with a flame present at all times when
Janet G. McCabe,
important to require that cameras are in use. Each row of flare burners must
have at least one pilot with a constant Acting Assistant Administrator.
installed and operated such that
operators have a visual indication of pilot flame. The pilot flame(s) must be [FR Doc. 2015–03064 Filed 2–12–15; 8:45 am]
flames from the flare at all times that the continuously monitored by a BILLING CODE 6560–50–P
MPGF is operating and that this footage thermocouple. The time, date and
be available for inspection by the duration of any loss of pilot flame must
permitting agency, along with be recorded. Each monitoring device DEPARTMENT OF HEALTH AND
operational records of the waste gas must be maintained or replaced at a HUMAN SERVICES
flowrate, pressure in header and stages, frequency in accordance with the
pilot and waste gas composition. manufacturer’s specifications. National Institutes of Health
Because these flares are located at 3. The flare system must be operated
ground level, it is possible that ambient with no visible emissions except for 42 CFR Part 11
concentrations of pollutants could be periods not to exceed a total of 5 [Docket Number NIH–2011–0003]
higher than they would be under an minutes during any 2 consecutive
alternative scenario where waste gases hours. A video camera can be used in RIN 0925–AA52
would be flared in an elevated flare, order to conduct visible emission
enabling greater dispersion and observations since operating personnel Clinical Trials Registration and Results
potentially lessening the impact to cannot enter the fenced area while the Submission
neighboring communities. To that end, MPGF is operating. AGENCY: National Institutes of Health,
we are soliciting comment on whether 4. The operator must install and Department of Health and Human
additional ambient monitoring is operate an on-line vent gas flow meter Services.
warranted to provide for immediate and an on-line gas chromatograph to
ACTION: Proposed rule; extension of
notification to emergency planning measure the flow and composition of
the vent gas to each flare. We would comment period; request for comments.
officials and the community during
significant events and malfunctions of expect the operator to comply with SUMMARY: The Department of Health and
the system. similar monitoring and testing Human Services (HHS) is extending the
requirements and recordkeeping and public comment period for the Notice of
III. AMEL for Pressure-Assisted MPGF reporting requirements for these Proposed Rulemaking (NPRM) on
Considering the above requests from monitoring systems as currently Clinical Trials Registration and Results
both Dow and ExxonMobil, we are proposed in 79 FR 36980–40 CFR Submission. The proposed rule was
seeking the public’s input on the 63.670(i)–(j) and (l)–(m). published on November 21, 2014 (79 FR
operating requirements for the proposed 5. The operator should install and 69566) with a deadline for public
pressure-assisted MPGFs that would be operate pressure and/or flow monitors comments of February 19, 2015. The
used by both companies which would on each stage of the flare. We would comment period is being extended to
establish an AMEL that will achieve a expect the operator to comply with provide additional time for commenters
reduction in emissions at least similar applicable monitoring and to prepare their responses. The
equivalent to the reduction in emissions testing requirements and recordkeeping comment period will close at 5 p.m.
being controlled by a steam-assisted, air- and reporting requirements for these Eastern Standard Time (EST) on March
assisted or non-assisted flare complying monitoring systems as currently 23, 2015.
with the requirements of either 40 CFR proposed in 79 FR 36980–40 CFR
63.11(b) or 40 CFR 60.18(b). Information DATES: Comments on the NPRM must be
63.670(i).
provided in the AMEL requests and the received before 5 p.m. EST on March 23,
available emissions test data from the IV. Request for Comments 2015 in order to ensure we will be able
test reports described above indicate We solicit comments on all aspects of to consider the comments when
that the following list of operating these requests for an AMEL. We preparing the final rule and policy.
requirements for pressure-assisted specifically seek comment regarding ADDRESSES: Individuals and
MPGF result in destruction efficiencies whether or not the potential alternative organizations interested in submitting
at least equivalent to destruction operating requirements listed in section comments on the NPRM, identified by
efficiencies expected from complying III above would be adequate for RIN 0925–AA52 and Docket Number
with the requirements of 40 CFR ensuring that the MPGF will achieve NIH–2011–0003, may do so by any of
63.11(b) and 40 CFR 60.18(b) for the good combustion at all times and enable the following methods:
pressure-assisted MPGF being proposed the facilities to meet their applicable • Electronic Submissions: Use
wreier-aviles on DSK5TPTVN1PROD with PROPOSALS
for use by both Dow and ExxonMobil: emission standards. Additionally, Federal eRulemaking Portal: http://
1. The flare system must be designed several other entities have indicated to www.regulations.gov. Follow the
and operated such that the net heating us that they intend to make similar instructions for submitting comments.
value of the combustion zone gas requests for the ability to operate NIH is no longer accepting comments
(NHVcz) for the pressure assisted flare pressure-assisted MPGFs. We are also submitted directly by email. The NIH
burners meets a minimum heating value soliciting comment on whether the encourages you to continue to submit
of 800 BTU/scf or a lower flammability requirements listed above, if followed electronic comments by using the
limit of the combustion zone gas (LFLcz) by these other entities, could enable Federal eRulemaking Portal: http://
of less than or equal to 6.5 percent by these other facilities to receive approval www.regulations.gov.
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Document Created: 2015-12-18 13:17:39
Document Modified: 2015-12-18 13:17:39
| Category | Regulatory Information | |
| Collection | Federal Register | |
| sudoc Class | AE 2.7: GS 4.107: AE 2.106: | |
| Publisher | Office of the Federal Register, National Archives and Records Administration | |
| Section | Proposed Rules | |
| Action | Request for comments. | |
| Dates | Comments. Written comments must be received on or before March 30, 2015. | |
| Contact | For questions about this proposed action, contact Ms. Brenda Shine, Sector Policies and Programs Division (E143-01), Office of Air Quality Planning and Standards (OAQPS), U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711; telephone number: (919) 541-3608; fax number: (919) 541-0246; | |
| FR Citation | 80 FR 8023 | |
| CFR Citation | 40
CFR
60 40 CFR 61 40 CFR 63 |
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