Source: https://www.federalregister.gov/documents/2010/08/12/2010-19822/approval-and-promulgation-of-air-quality-implementation-plans-mn
Timestamp: 2017-05-24 02:47:54
Document Index: 53272459

Matched Legal Cases: ['art 60', '§\u200960', 'art 60', 'art 60', 'art2', '§\u200952']

:: Approval and Promulgation of Air Quality Implementation Plans; MN
Approval and Promulgation of Air Quality Implementation Plans; MN
This direct final rule will be effective October 12, 2010, unless EPA receives adverse comments by September 13, 2010. If adverse comments are received, EPA will publish a timely withdrawal of the direct final rule in the Federal Register informing the public that the rule will not take effect.
48864-48867
EPA-R05-OAR-2010-0035
FRL-9187-5
Reduced SO2 Limits
https://www.federalregister.gov/d/2010-19822
EPA is approving Minnesota's request to amend its State Implementation Plan (SIP) for sulfur dioxide (SO2). The Minnesota Pollution Control Agency (MPCA) submitted the SIP revision request to EPA on November 23, 2009, and supplemented it on March 3, 2010. EPA's approval revises SIP requirements applicable to Saint Mary's Hospital, located in Rochester, Minnesota, by adding a 2500 kilowatt (KW) reciprocating internal combustion engine (RICE) electric generator and reducing the allowable diesel fuel sulfur content for two existing RICE electric generators. The revision also includes administrative changes in the identification of emissions units. These revisions are included in a joint Title I/Title V document for Saint Mary's Hospital, which replaces the document currently approved into the SIP for the facility. These revisions will result in reducing the SO2 impact in the Rochester area, and strengthen the existing SO2 SIP.
Submit your comments, identified by Docket ID No. EPA-R05-OAR-2010-0035, by one of the following methods:
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Instructions: Direct your comments to Docket ID No. EPA-R05-OAR-2010-0035. 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 e-mail. The http://www.regulations.gov Web site is an “anonymous access” system, which means EPA will not know your identity or contact information unless you provide it in the body of your comment. If you send an e-mail comment directly to EPA without going through http://www.regulations.gov your e-mail 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, 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 EPA cannot read your comment due to technical difficulties and cannot contact you for clarification, EPA may not be able to consider your comment. Electronic files should avoid the use of special characters, any form of encryption, and be free of any defects or viruses.
Docket: All documents in the docket are listed in the http://www.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, will be publicly available only in hard copy. Publicly available docket materials are available either electronically in www.regulations.gov or in hard copy at the Environmental Protection Agency, Region 5, Air and Radiation Division, 77 West Jackson Boulevard, Chicago, Illinois 60604. This facility is open from 8:30 a.m. to 4:30 p.m., Monday through Friday, excluding Federal holidays. We recommend that you telephone Charles Hatten, Environmental Engineer, at (312) 886-6031 before visiting the Region 5 office.
This action applies only to the Saint Mary's Hospital, located at 1216 Second St., Rochester, Minnesota (Olmsted County).
Minnesota published a public notice of the revisions to the SIP on August 22, 2009. The comment period began on August 23, 2009, and ended on September 23, 2009. In the public notice, Minnesota stated it would hold a public hearing if one were requested during the comment period. This follows the alternative public participation process EPA approved on June 5, 2006 (71 FR 32274). For limited types of SIP revisions that the public has shown little interest in, a public hearing is not automatically required. Because no one requested a public hearing, Minnesota did not hold a public hearing.
Saint Mary's Hospital is a tertiary care hospital which includes several buildings located on a 49 acre campus. The Saint Mary's Hospital is owned and operated by the Mayo Foundation. The facility is a culpable source located in the Rochester area's nonattainment plan for the SO2 National Ambient Air Quality Standard (NAAQS). However, the area currently meets the NAAQS for SO2, and was officially redesignated as attainment on May 8, 2001. (66 FR 14087)
The primary emission units at the facility are three identical fossil fuel-Start Printed Page 48865fired boilers (Nos. 1, 2, and 3), which exhaust through a common stack; one cogeneration turbine; and two emergency RICE generators. Each boiler burns natural gas as fuel with distillate oil as a backup fuel. The cogeneration turbine burns only natural gas. One of the RICE generators burns only distillate oil; the other can burn distillate oil or operate in a dual-fuel mode (95% natural gas and 5% distillate oil/very low sulfur diesel).
Saint Mary's Hospital is planning to make a physical change to the facility by adding a new RICE electric generator. The facility will also be required to reduce the allowable diesel fuel sulfur content for two existing emergency RICE electric generators. The State provided a modeling analysis of the effect of the changes at the facility on local SO2. Below, in Section III, a more detailed discussion of the modeling analysis and its results can be found.
The State has requested that EPA approve, as a revision to the Minnesota SIP, a new joint Title I/Title V document that incorporates: (1) Administrative changes in the identification of emission units, (2) the installation a 2500 KW RICE electric generator, and (3) a reduction in the allowable diesel fuel sulfur content for two existing RICE electric generators.
The facility has been subject to a federally enforceable permit incorporated into Minnesota's SIP as a joint Title I/Title V document, containing requirements for ensuring the attainment of the NAAQS for SO2. As a result, the facility is subject to fuel usage limitations to restrict the total facility SO2 emissions.
Minnesota's consolidated permitting regulations, approved into the SIP on May 2, 1995 (60 FR 21447), includes the term “Title I condition” which was written, in part, to satisfy EPA requirements that SIP control measures remain permanent. A “Title I condition” is defined as “any condition based on source-specific determination of ambient impacts imposed for the purposes of achieving or maintaining attainment with the national ambient air quality standard and which was part of the state implementation plan approved by EPA or submitted to the EPA pending approval under section 110 of the act * * *.” The rule also states that “Title I conditions and the permittee's obligation to comply with them, shall not expire, regardless of the expiration of the other conditions of the permit.” Further, “any Title I condition shall remain in effect without regard to permit expiration or reissuance, and shall be restated in the reissued permit.”
Minnesota has initiated using joint Title I/Title V documents as the enforceable document for imposing emission limitations and compliance requirements in SIPs. The SIP requirements in joint Title I/Title V documents submitted by MPCA are cited as “Title I conditions,” therefore ensuring that SIP requirements remain permanent and enforceable. EPA reviewed the State's procedure for using joint Title I/Title V documents to implement site-specific SIP requirements and found it to be acceptable under both Titles I and V of the Clean Air Act (July 3, 1997, letter from David Kee, EPA, to Michael J. Sandusky, MPCA). Further, a June 15, 2006, letter from EPA to MPCA clarifies procedures to transfer requirements from Administrative Orders to joint Title I/Title V documents.
This SIP revision replaces the joint Title I/Title V document currently approved into the SIP for Saint Mary's Hospital with a new joint Title I/Title V document, Air Permit No. 10900008-003. The new joint document includes administrative changes in the identification of emission units, adds a 2500 KW RICE electric generator, and reduces the allowable diesel fuel sulfur content for two existing RICE electric generators.
The new joint document reflects administrative changes in how the emission units are described. Boilers 1, 2, and 3 were listed in the joint document previously issued to Saint Mary's Hospital and identified as EU038, EU039, and EU040. In the new joint document, Air Permit No. 10900008-003, these boilers are now identified as EU001, EU002, and EU003. Correspondingly, the two existing emergency RICE generators, which were previously identified as EU0041 and EU0042, are now identified as EU005 and EU006.
The amendment to the SIP allows the installation of a new RICE electric generator. The new RICE generator, identified as EU012, is a 2500 kilowatt non-emergency compression ignition diesel engine subject to 40 CFR part 60, subpart IIII, for 2007 model year engines with displacement less than 10 liters per cylinder. In § 60.4207 of 40 CFR part 60, subpart IIII, the new electric generator is subject to a requirement to burn only diesel fuel with a sulfur content of less than 500 parts per million (ppm) by weight. This represents a limit of 0.05% sulfur by weight. Further, as of October 1, 2010, this diesel fuel oil limit will decrease to 15 ppm by weight (0.0015% sulfur by weight). This new diesel fuel oil limit is imposed by 40 CFR 80.510 upon owners or operators of new engines subject to 40 CFR part 60, subpart IIII, and is listed as a SIP condition to ensure that it will not exceed this Federal standard.
In addition to the above said requirements, the SO2 emissions for new RICE generator will be limited to 1.52 tons per year based upon an operational restriction of 2045 hours per year.
The existing boilers, cogeneration turbine, and generators are subject to fuel sulfur limits in order to comply with the NAAQS requirements for SO2. As noted above, the cogeneration turbine burns only natural gas, and therefore is not subject to any Title I SIP conditions for SO2. The SO2 SIP emission limits for the boilers are unchanged. The boilers must burn only natural gas and low-sulfur distillate fuel, less than 0.5% sulfur by weight.
The existing generators have been subject to a requirement to burn distillate oil with sulfur content less than 0.41% by weight. In order to add the new generator and ensure that the emissions from the facility remain at or below current SIP levels, Saint Mary's Hospital agreed to align the fuel sulfur requirements of the existing generators with the new generator. Thus, the existing generators will be subject to the same requirements as the new generator; namely, a requirement to burn only diesel fuel with a sulfur content of less than 500 ppm by weight. This new limit of 0.05% sulfur by weight is considerably lower than the old limit of 0.41% sulfur by weight, resulting in a decrease in the amount of SO2 emissions from the existing generators Start Printed Page 48866by a factor of 8.2 (0.41/0.05). Further, the diesel fuel oil limit for the existing generators will decrease to 15 ppm by weight (0.0015% sulfur by weight) as of October 1, 2010, which is the same as the limit imposed on the new generator by 40 CFR 80.510.
The SIP revision does not include any increases in SO2 emission limits but, because some of the changes being made to the facility may affect the release and dispersion of SO2 emissions, Saint Mary's Hospital performed an air quality analysis to address the facility's impact on the SO2 NAAQS. The facility was modeled both with and without the new generator. The modeling was done with the AERMOD air dispersion model using meteorological data from 1986 to 1990, and included flagpole receptors in downtown Rochester. The high-first-high results for each standard averaging time (1 hour, 3 hour, 24 hour, and annual) were compared for the two scenarios at each receptor. With the addition of the 500 ppm by weight fuel oil sulfur content for the two existing generators, the results showed equivalent or decreased ambient impacts from the facility at each receptor, even after the installation of the new generator.
Table—High-Second-High Ambient SO2 Concentration From FacilityAveraging timeModeled concentration (μg/m3)BackgroundTotalStandard19861987198819891990MaxFacility Prior to Modification1-hour3283183373173363372636313003-hour24425324926925026913282130024-hour1241341101271321345139365Annual21212021202132460Facility After Modification1-hour3013003203033193202634613003-hour23724524226223826213275130024-hour109117941211251255130365Annual15151414131531860
The modeling shows that the high-second-high impacts from the facility will decrease due to the changes from this SIP revision: the installation of the new generator and the decreased fuel oil sulfur limits on the two existing generators. This assures that ambient air quality will be protected.
EPA is approving the revision to Minnesota's SIP to replace the joint Title I/Title V document currently approved into the SIP for Saint Mary's Hospital with a new joint Title I/Title V document, Air Permit No. 10900008-003. The new joint document includes administrative changes in the identification of emission units, adds a 2,500 KW RICE electric generator, and reduces the allowable diesel fuel sulfur content for two existing RICE electric generators. In approving this joint Title I/Title V document, EPA is incorporating into the SIP only those requirements in the joint document labeled as “Title I Condition: SIP for SO2 NAAQS.”
Since this SIP revision will decrease SO2 impacts in the Rochester area, Saint Mary's revision will strengthen the existing SO2 SIP.
We are publishing this action without prior proposal because we view this as a noncontroversial amendment and anticipate no adverse comments. However, in the proposed rules section of this Federal Register publication, we are publishing a separate document that will serve as the proposal to approve the state plan if relevant adverse written comments are filed. This rule will be effective October 12, 2010 without further notice unless we receive relevant adverse written comments by September 13, 2010. If we receive such comments, we will withdraw this action before the effective date by publishing a subsequent document that will withdraw the final action. All public comments received will then be addressed in a subsequent final rule based on the proposed action. EPA will not institute a second comment period. Any parties interested in commenting on this action should do so at this time. If we do not receive any comments, this action will be effective October 12, 2010.
Is not subject to requirements of Section 12(d) of the National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 note) because Start Printed Page 48867application of those requirements would be inconsistent with the Clean Air Act; and
Under section 307(b)(1) of the Clean Air Act, petitions for judicial review of this action must be filed in the United States Court of Appeals for the appropriate circuit by October 12, 2010. Filing a petition for reconsideration by the Administrator of this final rule does not affect the finality of this action for the purposes of judicial review nor does it extend the time within which a petition for judicial review may be filed, and shall not postpone the effectiveness of such rule or action. This action may not be challenged later in proceedings to enforce its requirements. (See section 307(b)(2).)
Start Amendment Part2. In § 52.1220 the table in paragraph (d) is amended by revising the entry for “Saint Mary's Hospital” to read as follows:End Amendment Part
EPA-Approved Minnesota Source-Specific PermitsName of sourcePermit No.State effective dateEPA approval dateComments * * * * * * *St. Mary's Hospital10900008-00303/01/1008/12/10, [Insert page number where the document begins]Only conditions cited as “Title I condition: SIP for SO2 NAAQS.” * * * * * * *
[FR Doc. 2010-19822 Filed 8-11-10; 8:45 am]