UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

REGION 8 

Ref: 8P-AR 

Bryce Bird, Director 

Utah Division of Air Quality 

P. 0 . Box 144820 

Salt Lake City, Utah 84114-4820 

1 595 Wynkoop Street 

DENVER, CO 80202-1129 

Phone 800-227-8917 

http://www.epa.gov/region08 

JUN 17 2015 

Re: State Implementation Plan (SIP) Attainment Plan for the Logan, UT-ID PM2.s Nonattainment Area; 

Transportation Conformity Adequacy 

Dear Mr. Bird: 

The EPA has reviewed the Logan, UT-ID PM2.s Attainment Plan SIP revision, SIP Section IX. Part A.23, 

that was submitted by the Governor in a letter dated December 16, 2014. Our review was with respect to 

federal transportation conformity requirements. 

Based on our review, we have found the Logan, UT-ID PM2.s Attainment Plan, and the new 2015 motor 

vehicle emissions budgets (MVEB) contained in the plan, adequate for purposes of transportation 

conformity. Our finding involves the MVEBs, as identified for the Logan/Cache County portion of the 

nonattainment area, for PM.2.s, nitrogen oxides (NOx), and volatile organic compounds (VOC). This 

finding is based primarily on the Logan, UT-ID PM.2.s Attainment Plan and the MVEB's ability to meet 

the applicable procedures and criteria for adequacy pursuant to 40 CFR 93 .11 8 of the federal 

Transportation Conformity Rule (see 40 CFR 93, Subpart A). We will announce our adequacy finding by 

publishing a Notice in the Federal Register; the adequacy finding will then become federally effective 15 

days after the publication of the Notice. 

As part of our adequacy review, we announced receipt of the Logan, UT-ID PM2.s Attainment Plan and 

posted an announcement of availability on EPA' s Office of Transportation and Air Quality website at: 

http://www.epa.gov/otag/stateresources/transconf/currsips.htm. We requested public comments by April 

22, 2015. We did not receive any comments. 

The 2015 MVEBs that we found adequate for the Logan, UT-ID PM2.s Attainment Plan, for the 

Logan/Cache County portion of the nonattainment area, are 0.32 tons per day (tpd) for PM2.s, 4.49 tpd for 

NOx, and 3.23 tpd for VOCs. 

EPA's adequacy finding affects future transportation conformity determinations as prepared by the Cache 

Metropolitan Planning Organization and the conformity determinations as found to conform by the 

Federal Highway Administration and Federal Transit Administration. 
Please note that this adequacy finding is separate from EPA's future rulemaking action on the Logan, UTID PM2.s Attainment Plan SIP revision and should not be used to prejudge EPA's approval or disapproval 

of the SIP revision. 

If members of your staff have any questions, please have them contact Tim Russ of my staff at 303-312-

6479 or email at russ.tim@epa.gov. 

w20. 

Carl Daly, Direc» 

Air Program 

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® Printed on Recycled Paper 
Cache County, Logan, Utah PM2.s Attainment Plan Adequacy Evaluation 

Transportation Review Criteria Is Criterion Reference in SIP Document I Comments Satisfied? 

Sec. 93 . l 18(e)(4)(i) The plan was y December 16, 2014 letter from Gary R. 

endorsed by the Herbert, Governor of Utah. 

Governor (or The submittal includes evidence of a public 

designee) and was hearing that occurred on October 20, 2014 

subject to a public before Kathy Van Dame, Utah Air Quality 

hearing. Board (UAQB) hearing officer. 

Public Hearing Notice: Published; Utah 

Division of Administrative Rules (DAR), 

Utah State Bulletin dated October 1, 2014. 

Sec. 93.l 18(e)(4)(ii) The plan was y The submittal was developed by the Utah 

developed through Division of Air Quality (UDAQ) with input 

consultation with from federal agencies (including EPA), local 

federal, state and authorities, regulated businesses, and the 

local agencies; full Metropolitan Planning Organization (MPO). 

implementation EPA provided comments on the plan in our 

plan documentation letter of October 30, 2014. EPA's 

was provided and comments, and other comments, were 

EPA' s stated addressed in the Administrative 

concerns, if any, Documentation that was submitted by Bryce 

were addressed. Bird, Director of UDAQ, in a letter to EPA 

dated December 22, 2014. 

Sec. 93 .118( e )( 4 )(iii) The Motor Vehicle y Control Measures for Area and Point 

Emissions Budgets Sources, Fine Particulate Matter, PM2.5 SIP 

(MVEBs) are for the Logan, UT-ID Nonattainment Area, 

clearly identified Section IX. Part A.23. Chapter 7: 

and precisely Transportation Conformity (Logan-Page 60), 

quantified. Section 7.6: Transportation Conformity 

PM2.s Budgets, Table 7 .1; 0.32 tons per day 

of PM2.s, 4.49 tons per day ofNOx, and 3.23 

tons per day ofVOCs. 

Sec. 93.118(e)(4)(iv) The motor vehicle y The 2015 MVEBs are consistent with the 

em1ss1ons Attainment Demonstration and Plan as 

budget(s), when described in the Utah SIP; Control Measures 

considered together for Area and Point Sources, Fine Particulate 

with all other Matter, PM2.s SIP for the Logan, UT-ID 

em1ss10n sources, Nonattainment Area, Section IX. Part A.23. 

is consistent with 

applicable 

requirements for 

reasonable further 

progress, 

attainment, or 

maintenance 

(whichever is 

1 
Transportation Review Criteria Is Criterion Reference in SIP Document I Comments Satisfied? 

relevant to the 

given plan). 

Sec. 93.l 18(e)(4)(v) The plan shows a y The Utah SIP, Control Measures for Area 

clear relationship and Point Sources, Fine Particulate Matter, 

between the PM2.s SIP for the Logan, UT-ID 

em1ss1ons Nonattainment Area Section IX. Part A.23 , 

budget(s), control Chapters 4, 5, 6, and 7 show the relationship 

measures and the between the mobile source emissions, 

total emissions MVEBs, control measures and the total 

inventory. emissions inventory. 

Sec. 93.l 18(e)(4)(vi) Revisions to y Mobile source emissions and motor vehicle 

previously and MVEBs were documented with the 

submitted control Governor's December 16, 2014 submittal of 

strategy or the Control Measures for Area and Point 

maintenance plans Sources, Fine Particulate Matter, PM2.s SIP 

explain and for the Logan, UT-ID Nonattainment Area 

document any Section IX. Part A.23. The Governor's 

changes to any December 16, 2014 letter notes that a prior 

previous submitted December 14, 2012 SIP submittal for the 

budgets and control Control Measures for Area and Point 

measures; impacts Sources, Fine Particulate Matter, PM2.s SIP 

on point and area for the Logan, UT-ID Nonattainment Area 

source em1ss1ons; Section IX. Part A.23 , was withdrawn. 

any changes to 

established safety 

margins (see 

93.101 for 

definition), and 

reasons for the 

changes (including 

the basis for any 

changes to 

emission factors or 

estimates of vehicle 

miles traveled). 

Sec. 93.l 18(e)(5) EPA has reviewed y EPA reviewed Section H of the 

the State's Administrative Documentation, as submitted 

compilation of by Bryce Bird, UDAQ, letter of December 

public comments 22, 2014, for the Utah SIP Control Measures 

and response to for Area and Point Sources, Fine Particulate 

comments that are Matter, PM2.s SIP for the Logan, UT-ID 

required to be Nonattainment Area Section IX. Part A.23. 

submitted with any Administrative Documentation Section H is 

implementation entitled "Comments - Hearing" and 

plan. contains: "PM2.5 SIP Sections IX.A.21 , 

IX.A.22, IX.A.23 and SIP Sections IX.H.11 , 

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Transportation Review Criteria Is Criterion Reference in SIP Document I Comments Satisfied? 

12 and 13: Comments and Responses to 

Comments Made During the October 2014 

Public Comment Period." 

Reviewers: Tim Russ, USEP A, Region 8 Date of Review: March 16, 2015 

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