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TO: UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION Ill 1650Arch Street Philadelphia, Pennsylvania 19103-2029

Technical Support Document; Commonwealth ofWV Division ofAir Quality; Prevention ofSignificant Deterioration (PSD) SIP Revision Request Paul Wentworth Office of Permits and State Programs Air Protection Division David Campbell, Director

# ~**\~ (**  Office of Permits and State

# Progr**~** l'L\'', Air Protection Division U.S. Environmental Protection Agency- Region Ill Approval and Promulgation ofAir Quality Implementation Plans; West Virginia (WV); Permits for Construction and Major Modification of Major Stationary Sources forthe Prevention of Significant Deterioration {PSD) I. Summary of SIP Revision The WVDEP submitted a SIP revision to EPA on June 3, 2015 (the June 2015 submission). This SIP revision request, ifapproved, would revise West Virginia's currently-approved PSD program by amending Series 14 underTitle 45 ofWV Code ofState Rules (45CSR14). WV is amending 45CSR14 in response to a deficiency in 

### WW's PSD program. Specifically, the June 2015 submission involves revisions to PSD regulation at 45CSR14-16.7.c which incorporates an SMC value ofzero micrograms per cubic meterfor PM2.s, as will be discussed in detail in the following sections II. Background A. WV PSD Program SIP Revision Submission History Leading up to this submission on June 3, 2015 (June 2015 submission), there have been (3) related SIP revision requests submitted to EPA, containing changes in WV's PSD program. These changes in general were driven by Federal rulemaking activity surroundingthe implementation ofthe Federal rule implementingthe 1997 PM2.s National Ambient Air Quality Standard (NAAQS), including changes to the New Source Review (NSR) program (this rule was promulgated on May 16, 2008 and is referred to as the 2008 NSR PM2.s Rule). 

### See 73 FR 28321.Appendix A: WV PSDSIP R evision Submission History is presented in an effortto assist in providing background forthis rulemaking
. Some ofthese changes were a_s a result of litigation resulting in court decisions which changed certain aspects ofthe 2008 PMz.s Rule subsequent to its promulgation. These changes to the 2008 PMz.s Rule discussed in detail in the section titled: "Background ofThe Implementation ofthe 2008 PMz
.sRule." 

### 1. The August 31, 2011 Submission The first ofthe (3) PSD SIP revisions was submitted to EPA on August 31, 2011, by the State of WV through the WV Department of Environmental Protection (WVDEP). The August 2011 SIP submission contained changes to WV's PSD program in orderto address PMz
.semissions as a result ofthe EPA promulgating 2008 NSR PMz
.s. Rule. On July 31, 2012 (77 FR 45302), EPA proposed full approval ofWV's August 2011 SIP submission.**I~** this same action, EPA proposed that West Virginia met its statutory obligations with respect tothe PSD portions of infrastructure SIPs forthe following NAAQS: 1997 PMz.s, 1997 ozone, and 2006 PMz.s. Infrastructure SIPs are required bythe CAA whenever new or revised NAAQS are promulgated, in orderto showthatthe state has the ability to implement, maintain, and enforce the NAAQS. A detailed explanation regarding infrastructure submissions is found at Section II.C: "Explanation of Infrastructure Requirements." During the public comment period, EPA received adverse comment on WV State Rule 45CSR14 that WV's PSD regulations did not properly account for condensable emissions of PM. 1 As a result, on October 17, 2012 in afinal rule (77 FR 63736), EPA granted full approval ofWV's August 2011 SIP submission, but excluded the issue ofthe requirement to include condensables in the definition of "regulated NSR pollutant." 2 In addition, EPA also granted full approval, with the exception ofthe narrow issue regarding the inclusion ofcondensables in the definition of "regulated NSR pollutant," ofthe PSD portions of infrastructure SIPs that had been submitted but not yet acted upon at thattime. This action impacted the infrastructure SIPs for the 1997 PMz.s and ozone NAAQS, the 2006 PMz.s NAAQS, and the 2008 lead and ozone NAAQS. On May 9, 2013, EPA disapproved a narrow portion ofthe August 2011 submission for PMz.s and PM emissions less than or equal to ten micrometers in diameter (PM10). 3 In that same rulemaking EPA disapproved specific portions ofWV's infrastructure SIP submissions forthe 1997 PMz.s and ozone NAAQS, the 2006 PMz.s NAAQS, and the 2008 lead and ozone NAAQS (collectively, the WV Infrastructure SIP Submissions) which addressed certain obligations related to the 

### states' PSD permit program.4 2. The June 2012 and July 2014 Submissions 1The inclusion ofcondensable emissions ofPM is required bythe Federal counterpart language in 40 CFR 52.21 and 51.166 and the NSR PM2
.s Rule. 2 In the October I7, 20I2 fmal rule, EPA statedthat West Virginia State Rule 45CSRI4 would bereviewed to determine the extentto which condensables were addressed in the August 20II SIP submission and that this issue would be addressed in a separaterulemaking action. See 77 FR63736. 3See 78 FR27062 (May 9, 2013)
. The limited disapproval ofthe narrow portion ofthe August 3I, 20II SIP provision (concerning 45CSRI4 section 2
.66) is discussed in 78 FR27062 and in 40 CFR 52.2522(j)(l) specifically
. 4West Virginia submitted SIP revisions to meet the requirements ofsections IIO(a)(I) and IIO(a)(2) ofthe CAA (also known as infrastructure requirements) for the I997PM2,sNAAQS onDecember Il, 2007 and April 3, 2008; the I997 ozone NAAQS on December 3, 2007 and December II, 2007; the 2006 PM2.sNAAQS on October I, 2009; the 2008 leadNAAQS on October 26, 20II; and the 2008 ozone NAAQS on February I7, 20I2. 2The WVDEP submitted two SIP revisions to EPA on June 6, 2012 (the 2012 submittal) and on July 1, 2014 (the 2014 submittal). EPA acted on these two submittals - as awhole. A summary of all the changes made in each ofthe submittals has been included as appendix B in this TSD. The significant changes to the provisions of45CSR14 contained in the June 2012 submission were the addition ofSignificant Impact Levels (Sils) requirement and values for PM2.s; and the addition of24-hour de minimis air quality impact concentration values for PM2
.s(aka SMC Values). Between the June 2012 submission and the July 2014 submission, the D.C. Circuit vacated parts ofthe PSD lncrements-Sils-SMC Rule establishing the PM2.s SMC and EPA took final responsive action on December 9, 2013 to remove the SIL provisions from the Federal PSD regulations in 40 CFR 52.21 and to revise the SMC for PMz.s to zero micrograms per cubic meter. A detailed discussion on this issue is provided in Section B: 11Background ofThe Implementation ofthe 2008 PMz.s Rule." The July 1, 2014 submission addressed the May 9, 2013 disapproval by incorporating condensable emissions of PM (condensables) within the definition of "regulated new source review (NSR) pollutant" (at 45CSR14 section 2.66} for PM2
.sand PM emissions less than or equal to ten micrometers in diameter (PMw). The July 2014 submission also attempted to address the changes to the Slls-SMC Rule by deletingthe 24-hour de minimis air quality impact concentration value for PMz
.s(aka SMC for PMz.s) instead ofchanging the SMC for PMz.sto a value ofzero. This meantthatthe submission did not meetthe requirements spelled out in EPA's December 9, 2013 Federal rulemaking (which revised the existing concentration forthe PM2.s SMC to zero micrograms per cubic meter). To avoid a disapproval ofthe entire 2012/2014 submission package, WV in aJanuary 

### 20, 2015 letter to the EPA committed to submit an additional SIP revision with a revised PSD regulation at 45CSR14-16.7.c which incorporates an SMC value of zero micrograms per cubic meterfor PM2
.sto address this discrepancy, allowing EPA to conditionally approve the 2012/2014 submittal package by WV. The approval ofthe 2012/2014 submission package was conditional upon WV submittingthis SIP revision no laterthan one year followingthe final rulemaking notice effective date ofJuly 27, 2015 for conditional approval ofthe 2014/2012 submittal package (80 FR36483}. Based on EPA's analysis discussed below, EPA has found thatthe 2015 submittal fulfills the commitment made in WV's January 

### 20, 2015 commitment letter. B. Background ofthe Implementation ofthe 2008 PMz.s Rule On May 16, 2008, EPA promulgated a rule to implementthe 1997 PM2.s NAAQS, including changes to the NSR program (the 2008 NSR PM2
.s Rule)
. See 73 FR 28321. The 2008 NSR PM2
.s Rule revised the NSR program requirements to establish the framework for implementing preconstruction permit review forthe PM2.s NAAQS in both attainment and nonattainment areas. 5 The 2008 NSR PM2 .5 rule: 1) required NSR permits to address directly emitted PM2
.sand precursor pollutants; 2) established significant emission rates for direct PMz
.sand precursor 5 The PSD permitting program is the NSRpermitprogram in areas attaining a particularNAAQS. 3pollutants (including sulfur dioxide (S02) and oxides of nitrogen (NOx)); 3) established PM2.s emission offsets; and 4) required states to account for gases that condense to form particles (condensables) in PM2
.semission limits
.6 The 2008 NSR PM2
.s Rule (as well as the more general PM2.s NAAQS implementation rule, the 2007 "Final Clean Air Fine Particle Implementation Rule" (2007 PM2
.s Implementation Rulef), was the subject of litigation before the United States Court ofAppeals forthe District of Columbia Circuit (D.C. Circuit) in 

### Natural Resources Defense Council v. EPA (hereafter, 

### NRDC v. EPA). 8 On January 4, 2013, the D.C. Circuit remanded to EPA both the 2007 PM2
.s Implementation Rule and the 2008 NSR PM2
.s Rule. The court found**t~at** in both rules EPA erred in implementingthe 1997 PM2.s NAAQS solely pursuant to the general implementation provisions ofsubpart 1 of part D oftitle I ofthe CAA (subpart 1), ratherthan pursuant to the additional implementation provisions specific to particulate matter in subpart 4 of part Dof title I (subpart 4). 9 EPA did not consider the portions ofthe 2008 NSR PM2
.s Rule that address requirements for PM2
.sattainment and unclassifiable areas to be affected bythe 

### NRDC v. EPA opinion, because the requirements ofSubpart 4 only pertain to nonattainment areas. The CAA's PSD provisions also establish maximum allowable increases over baseline concentrations - also known as "increments" - for certain pollutants
. In the 2008 PM2.s Rule, EPA had the task of promulgating regulations to preventthe significant deterioration ofair qualitythat would result from the emissions of pollutants EPA began regulating after Congress enacted the PSD provisions in the CAA. The PSD provisions establish preconstruction review and permitting of new or modified sources of air pollution. In 2007, EPA proposed a rule establishing increments for PM2.s and also proposed two screening tools that would exempt permit applicants from some air quality analysis and monitoring required for PSD: significant impact levels (Sils) and significant monitoring concentration (SMC)
. 

### See 72 FR 54112 (September 21, 2007)
. In our October 20, 2010 final rule (the PM2.s PSD lncrements-Sils-SMC 

### Rule), EPA set values for both Slls and SMC for PM2.s. 

### See 75 FR 64864
. The Sierra Club challenged EPA's authorityto implement PM2.sSILs 

### and SMC for PSD purposes as promulgated in the PM2
.s PSD lncrements-Sils-SMC 

### Rule. See Sierra Club v. EPA, 705 F.3d 458 (D.C. Cir. 2013). On January 22, 2013, the D.C. Circuit granted a request from EPA to vacate and remand to the Agency the portions ofthe PM2
.s PSD lncrements-Sils-SMC 

### Rule addressing the 

### Slls for PM2.s (found in paragraph (k)(2) in 40 CFR51.166 and 52.21), except forthe parts codifyingthe PM2.s 

### Slls at 40 CFR 51 .165(b)(2), so thatthe EPA could voluntarily correct an error in the provisions
. I

### d
. at 463-66
. The D.C. Circuit also vacated parts ofthe PSD lncrements

### Sils-SMC Rule establishing the PM2.s 

### SMC, finding thatthe Agency had exceeded its statutory authority with respect to these provisions. 

### Jd. at 469.

6On October25, 2012, EPA tookfinal action to amend the defmition of "regulatedNSRpollutant"promulgated in the 2008 NSRPM2.5 Rule regarding the particulate matter (PM) condensable provision at 40 CFR 51.166(b)(49)(vi) and 52.21(b)(50)(i). See 77 FR65107. The rulemaking removed the inadvertent requirement in the 2008 NSR PM2• 5 Rule that the measurement ofcondensable "particulate matter emissions" be included as part ofthe measurement andregulation of "particulate matter emissions." 7 72 FR20586 (April 25, 2007). 8706 F.3d428 (D.C. Cir. 20 13). 9The court's opinion did not specifically address the pointthat implementation under subpart4 requirements would still require consideration ofsubpart 1requirements, to the extent that subpart4 did not override subpart 1. EPA assumes that the courtpresumed that EPA would address this issue ofpotential overlap between subpart 1 and subpart 4 requirements in subsequent actions. 4

### In response to the D.C. Circuit's decision, EPA tookfinal action on December 9, 

### 2013 to remove the SIL provisions from the Federal PSD regulations in 40 CFR 52.21 and to revise the SMC for PM2
.sto zero micrograms per cubic meter. See 78 FR 73698. Because the D.C. Circuit vacated the SMC provisions in 40 CFR 51.166(i)(S)(i)(c) and 52.21(i)(S)(i)(c), EPA revised the existing concentration for the PM2.s SMC listed in sections 51.166(i)(S)(i)(c) and 52.21(i){S)(i)(c) to zero micrograms per cubic meter
. EPA did not entirely remove PM2.s as a listed pollutant in the SMC provisions because to do so might lead to the issuance of permits that contradict the holding of the D.C. Circuit as to the statutory monitoring requirements. 

### /d. (providing EPA's explanation for includingthe zero micrograms per cubic meter SMC). C. Explanation of Infrastructure Requirements Whenever a new or revised NAAQS is promulgated, section llO(a) ofthe CAA imposes obligations upon states to submit SIP revisions that provide forthe implementation, maintenance, and enforcement ofthe new or revised NAAQS within three years following the promulgation ofsuch NAAQS. These plans are required in orderto address basic program elements including, but not limited 

### to, regulatory structure, monitoring, modeling, legal authority, and adequate resources necessary to assure attainment and maintenance ofthe standards. These elements are referred to as infrastructure requirements. In particular, the infrastructure requirements ofsection 110(a){2)(D)(i)(ll), also known as prong 

### 3, require that a state must have provisions prohibiting emissions that would interfere with measures required to be in any other air agency's SIP under part Cofthe CAA to prevent significant deterioration ofair quality. 10 

### Because part Crequires an air agency's PSD permitting program to address all pollutants subject to regulation underthe CAA, EPA construes this to mean that an infrastructure SIP submission should have provisions to prevent emissions ofany regulated pollutant, notjustthe specific pollutant being addressed in that particular SIP submission, from interferingwith any other air agency's comprehensive PSD permitting program. With its narrow disapproval ofWest Virginia's PSD program in the May 

### 9, 2013 action, the EPA also determined that it could not fully approve the PSD portions ofthe five infrastructure SIPs it had received in the time period between West Virginia's August 31, 2011 PSD submittal and EPA's October 17, 2012 action (to approve the 

### state's PSD program with the narrow issue regarding the inclusion ofcondensables in the definition of "regulated NSR pollutant"). Therefore, in its May 9, 

### 2013 action EPA granted full approval, with exception ofthe narrow issue regarding the inclusion ofcondensable in the definition of "regulated NSR pollutant,' of the PSD portions ofthe infrastructure SIPs forthe following NAAQS: 1997 PM2
.s, 1997 

### ozone, 2006 PM2
.s, 2008 lead, and 2008 ozone. Infrastructure SIPs for the 2010 nitrogen dioxide NAAQS and the 2010 sulfur dioxide NAAQS were submitted to EPA by West Virginia after EPA had taken the May 9, 

### 2013 action. Forthese submittals, while EPA approved portions ofthe infrastructure SIP, the Agency refrained from taking action on portions ofthe SIP that related to West Virginia's PSD program. In the proposed rulemaking for which this TSD supports, EPA proposes to approve the following

10 While section 110(a)(2)(D)(i)(Il) ofthe CAA contains the bulk ofthe PSD-relatedrequirements under section 110(a)(2), sections 110(a)(2)(C) and 110(a)(2)(J) also outline PSD-relatedrequirements. 5PSD-related infrastructure elements forthe following NAAQS. NAAQS PSD-related infrastructure element(s) proposed to be approved in this action 1997 PM2.5 110{a)(2)(D)(i)(ll) 1997 ozone 110(a)(2)(D)(i)(II) 2006 PM2.5 110(a)(2)(D)(i)(ll) 20081ead 110(a)(2)(D)(i)(ll), (C), and ( J) 2008 ozone 110(a)(2)(D)(i)(ll), (C), and (J) 2010 nitrogen dioxide 110(a)(2)(D)(i)(ll), (C), and (J) 2010 sulfur dioxide 110(a)(2)(D)(i)(ll), (C), and (J)
Ill. EPA Analysis EPA finds the revisions to WV's PSD regulations at 45CSR14 contained in the June 2015 submittal combined with the 2012 and the 2014 submissions fulfill all the requirements ofthe latest revision of2008 NSR PM2.s Rule (at 40 CFR 51.166) because they now contain provisions that: 1) require NSR permits to address directly emitted PM2.s and precursor pollutants; 2) establish significant emission rates for direct PM2
.sand precursor pollutants (S02 and NOx); 3} require states to account for gases that condense to form particles (condensables) in PM2
.s emission limits; and, 4) address certain PSD program requirements discussed below. The June 2015 submittal fully addresses the D.C. Circuit's Sierra Club v. EPA decision and EPA's final December 9, 2013 rulemaking (78 FR 73698} (respondingto the D.C. Circuit's vacature of the SMC provisions in 40 CFR Parts 51 and 52 for PM2.s) by revising WV's PSD provision at 45CSR14-16.7.c to include an SMC value ofzero micrograms per cubic meterfor PM2
.s. Because this submission fulfills the commitment made by WV in the final rule for EPA's conditional approval ofthe 2012 and 2014 submission package by WV (80FR36483)(June 25, 2015), EPA is able to fully approve the 2012 and 2014 submission package and the 2015 SIP submission packages which means that WV's PSD regulation, 45CSR14, fully meets the federal requirements for PSD programs as set forth in the 2008 NSR PM2.s Rule, the D.C. Circuit's decision on Slls and SMC in Sierra Club v. EPA, and in EPA's December 9, 2013 rulemaking addressing that decision for Slls and SMC. Furthermore, based on the amendments to WV's PSD Program contained in the June 2015 submission combined with the 2012 and the 2014 submissions, EPA believes that WV's PSD program now contains adequate provisions to meetthe requirements ofsection 110(a)(2)(D)(i)(ll) for the 1997 ozone NAAQS, 1997 PM2.s NAAQS, and 2006 PM2.s NAAQS, as well as sections 110(a)(2)(C), (D)(i)(ll), and (J) forthe 2008 ozone NAAQS, the 2008 lead NAAQS, the 2010 nitrogen dioxide (N02) NAAQS, and the 2010 S02 NAAQS. Based upon the above analysis, WV's PSD program (inclusive ofthe PSD SIP Revision) is consistent with EPA's promulgated PSD regulations. WV's PSD program meets the applicable requirements of Part CofTitle I ofthe CAA. This program regulates the construction and major modifications of major stationary sources as necessary to assure that NAAQS are achieved in areas designated as attainment for a particular pollutant.

6IV. Proposed Action EPA is proposingto approve WV's June 3, 2015 SIP submittal containing revised PSD permit program implementation regulations at 45CSR14. In a previous action, EPA evaluated many aspects of45CSR14 and found thatthey are consistent with the federal PSD permit program requirements at 40 CFR 51.166. See 80 FR 36483. With the June 3, 2015 SIP submittal, WV provided a revised version of45CSR14 that contains an amendmentto specifically revise the SMC for PM2
.sto be consistent with the federal PSD provisions for SMC for PM2
.s. EPA is also proposingto determinethat WV has met its PSD obligations pursuant to infrastructure elements under section 110(a)(2) ofthe CAA forthe 1997 ozone and PM2.s NAAQS, the 2006 PM2.s NAAQS, the 2008 lead and ozone NAAQS, and the 2010 N02 and S02 NAAQS. EPA is soliciting public comments on the issues discussed in this document
.

7APPENDIX A PSD SIP Revision Submission History Submission Docket Reason for submission Action: Comments Date Number Action Date August 31, EPA-R03- To amend WV's Proposed EPA received adverse comment on WV 2011 OAR- Implementation ofthe Full State Rule 45CSR14 that WV's PSD 2012- Federal New Source Review Approval: regulations did not properly account for 0388- (NSR) Program (at 45CSR14) July 31, condensable emissions of PM. 0001 for Particulate Matter less 2012 (77 FR than 2
.5 Micrometers 45302) (PM2.5)" (NSR PM2.5 Rule), which was promulgated on May 16, 2008 {73 FR 28321).

8August 31, Final Rule: l.The approval excluded the narrow issue 2011 full Approval ofthe requirement to include October 17, condensables in the definition of 2012 (77 FR "regulated NSR pollutant" in the State's 63736) PSD program for PM 2.s and PM 10. 2.1n conjunction with this final rule EPA also approved PSD-related provisions found in CAA section 110(a)(2) for the 1997 and 2006 PM2
.sNAAQS, the 1997 ozone NAAQS, and the 2008 ozone and lead NAAQS. August 31, EPA-R03- (Refer to Above) Disapproval: 1. EPA determined that the omission of 2011 OAR- June 10, condensables from the definition of 2013- 2013 "regulated pollutant" in the state's 0113- (FR NO. regulation at 45CSR14 is cause for 0002 2013-10935) disapproval ofthat narrow portion ofthe SIP submittal and the related infrastructure submissions for the 1997 and 2006 PM2.s NAAQS, the 1997 ozone NAAQS, and the 2008 ozone and lead NAAQS. 2. This disapproval triggered the requirement under CAA section 110(c) that EPA promulgate a federal implementation plan (FIP) no later than June 15,2015 unles
. sthe State corrects the deficiency, and the Administrator approves the plan or plan revision before the Administrator promulgates the FIP.

June 6, EPA-R03- See Changes detailed
.in Conditional 1. The 2014 submittal addressed and 2012 OAR- Table 2 approval: corrected the deficiency identified in the 2015- July 27, May 9, 2013 disapproval (78 FR 27062) July 1, 0028- See changes detailed in 2015 (above) by adding language to the 2014 0040 Table 2 (FR NO provision at 45CSR14 section 2.66.a.1 2015-15530) which now includes PM condensable emissions in the definition of "regulated NSR pollutant" 2
. WVDEP's 2014 submittal appropriately removed Slls for PM2.s consistent with the D.C. Circuit's Sierra Club v. EPA decision and EPA's Federal final December 9, 2013 rulemaking (78 FR 73698). 3. WV's submittal did not include an SMC value ofzero micrograms per cubic meter for PM2.s consistent with the D.C. Circuit's Sierra Club v. EPA decision and EPA's 9December 9, 2013 rulemaking (78 FR73698). 4. January 20, 2015, WV committed by letterto submitting a new SIP revision with a revised PSD will incorporate a SMC value ofzero micrograms per cubic meter for PM2.s to address this discrepancy. Virginia committed to submitting this SIP revision no laterthan July 27, 2016. June 3, EPA-R03- The revision submitted by To Be EPA is proposingto approve the 2015 OAR- WVDEP on June 3, 2015 Determined Submission because itfulfills the 2015- involves revisions to PSD commitment made by WVDEP made in 0539 regulation at 45CSR14- the January 20, 2015 letterto EPA. 16.7.cwhich incorporates an SMC value ofzero EPA proposes to change its prior micrograms per cubic disapproval ofthe iSIPs identified above meterfor PM2.5. to a status ofapproval. EPA also proposes to approve the PSD portions ofthe iSIP submittals for the 2010 N02 and S02NAAQS.

10

### Appendix B
SUMMARY OF WV PSD PROGRAM SIP SUBMISSION CHANGES 2012 Submission
45CSR14 Description ofchange 1.1 Summary ofthe scope of4SCSR14 added
. 1.3-6 Regulatory text was updated to reflect filing and effective date ofthis version of45CSR14 2.9.a
. Changed the definition of Baseline Area. Replaced: "any county ofWV" with: "intrastate area (and every partthereof) designated as attainment or unclassifiable under §107(d)(1)(A)(ii) or (iii) ofthe CAA". Added table with air quality impact values for 502, NOx, PM10, and PM2.5 2.9.b
.1- b.2 Added new requirements for area redesignations under CAA section 107(d)(1)(A)(ii)or(iii) 2.42.a.1 Replaced:" particulate matter" with "PM10 2.42.a.3 Added this subsection which provides the major source baseline date for PM2.5 2.42.b1 Replaced:" particulate matter" with "PM10 2.42.b.3 Added this subsection which provides the minorsource baseline date for PM2.5 2.42.c.1 Changed CAA reference from: "CAA Section 107(d)(i)(D)" to "CAA Section 107(d)(1)(A)(ii) or(iii) 2.43.f & g relocated belowTable 1 2.46.b Removed phrase: "ofthis section" for clarity 2.46.e Removed wording regarding use of PM10 emissions to evaluate emissions increase for PM10 2.46.i Added this subsection regarding determination of creditable increases 4.1 Added annual and 24-hour Baseline concentration threshold values for PM2.5 for class 1,11,111 areas 9.1 Added Header entitled: "Required Demonstration" 9.1.a deleted: "WV"; Added: "in any air quality control region" 9.2 Deleted language talking about ambient impact of Major sources and major modifications 9
.2 Added Significant Impact Levels (Sils) requirement and values for PM2.5 13.6 Replaced:" particulate matter" with "PM2.5" 13.6 Added annual and 24-hour minor source Baseline concentration maximum allowable increases threshold values for PM2.5. Corrected PM10 labeling for clarity 16.7
.c Added 24-hour de minimis air quality impact concentration values for PM2
.5 (aka SMC Values) 2014 Submission
1.3-6 Regulatory text was updated to reflect filing and effective date ofthis version of4SCSR14 2.66.a Deleted wording identifying precursors.. Added words to introduce precursors listed in the proceeding table 2.66.a.1 Added PM condensable emissions to definition of "regulated NSR pollutant" 2.66.a.2 Added language identifying precursors to NAAQs pollutants to the definition of regulated NSR pollutant 2.66.a.2.A-C Reorders these subdivisions from 2.66.a.1-3 to 2.66.a.2.A-C 2.66.a.2.D Reorders this subdivision from 2.66.a.4 to 2.66.a.2.D 2.66.f deleted 2.80.b.1 Removed provision exempting the combustion of non-fossilized and biodegradable material from GHG emissions calculations
. 9.2 Deleted in its entirety 16.7.c Deleted 24-hour de minimis air quality impact concentration value for PM2.5 (aka SMC for PM2.5) 16.l.a & b Added provision ofexempting requirements of9.1 for stationary sources based on completeness date ofpermit applications

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