ENVIRONMENTAL PROTECTION protecting the future for generations 

### August 30,2010 Jared Blumenfeld, Regional Administrator OAR-1,USEPA Region IX 75 Hawthorne Street San Francisco, CA 94 105
Dear Mr. Blurnenfeld:
On behalf of Governor Gibbons, as his appointed designee, this letter transmits to the U.S. Environmental Protection Agency (EPA) a second supplementto the Clark County 

### Carbon Monoxide Redesignation Request andMaintenance Plan (2008 Plan) that was submittedto EPA on September 18,2008. The first supplementwas submittedon March 26,2010.Five hard copies ofthe second supplement are enclosed. The Nevada Division of Environmental Protection requests that, taking this additional information into account, EPA finalize its proposed approval (75 FR 44734) of the 2008 Plan into the Nevada State Implementation Plan and redesignatethe 

### Las Vegas Valley nonattainment area to attainment status for the carbon monoxide National Ambient Air Quality Standards. The enclosed supplement provides the letter of commitment requested by EPA in its proposed approval of Clark County's 2008 Plan. The enclosed letter from the Nevada Department of Agriculture commits to implementing a contingency measure contained in the 2008 Plan, i.e., reinstating the previous wintertime Reid Vapor Pressure maximum for gasoline, if necessary. Documentation ofthe public participation process for the commitment is also enclosed.
If you have any questions about this submittal,you may contact Robert Tekniepe ofthe Clark County Department ofAir Quality and Environmental Management at (702) 455-4063. Sincerely,



# M' Colleen Cripps, Ph.D. Acting Administrator

Enclosures cc WIO enclosures: Robin Reedy, Chiefof Staff, Office of the Governor Leo Drozdoff, Acting Director, DCNR Greg Remer, Chief, Bureau of Air Quality Planning, NDEP Robert Tekniepe, Planning Office, Clark County DAQEM 'bKarina O'Connor, Planning Office, EPA Region IX, AIR-2 Jefferson Wehling, Air Attorneys (ORC-2),EPA Region IX

Certified Mail No. 7009 3410 0000 1454 1388

901 S. Stewart Street,Suite 400 1 Carson City,Nevada 89701 p: 775.687.4670 f: 775.687.5856 www.ndep.nv.gov S+ prrnted an recycledpoper ----."- 

### -----".- -.'-..--.---August 20, 2010 DEPARTMENT OF AIR QUALIlY & ENVIRONMENTAL MANAGEMENT 500 S Grand Central Parkway 1st Floor. Box 555210

. Lor Vegar, NV 89155-5210 (702) 455-5942

. FOX (702) 383-9994 Lewis Wollmmsyer Director 

### . Tina tin rar krorlonl Dtreclor 

# RECEIV~D Ms. Colleen Cripps, PhD, Acting Administrator Nevada Division of Environmental Protection 901 South Steward Street, Suite 4001 Carson City, Nevada 89701-5249 

## AUG 

## 2.3 2010 ENVlRONENTALPROTECllON

Re: Supplemental Data in Support of the Clark County Carbon Monoxide Redesignation Request and Maintenance Plan, September 2008
Dear Ms. Cripps:
On September 10, 2008 the Clark County Department of Air Quality and Environmental Management (DAQEM) submitted to the Nevada Division of Environmental Protection (NDEP) the Clark County Carbon Monoxide Redesignation Request and Maintenance Plan (Plan). On September 18, 2008 NDEP forwarded the Plan to the U.S. Environmental Protection Agency (EPA) and requested that EPA approve the Plan into the Nevada State Implementation Plan and redesignate the Las Vegas Valley nonattainment area to attainment status for the carbon monoxide National Ambient Air Quality Standards.
On February 17, 2010 

## - at the request of EPA 

## - DAQEM provided evidence of adoption, appropriate public notice and attestation of stakeholder participation for the changes to the control measures contained in the Plan, i.e., suspension of Clark County Air Quality Regulation Section 54 (Cleaner Burning Gasoline), and amendment of Nevada Administrative Code 590.065 to change the Reid Vapor Pressure for wintertime fuels sold in Clark County from 9 to 13.5 pounds per square inch.
Since that time, EPA has requested DAQEM provide a letter of commitment from the Nevada .Department of Agriculture to implement a contingcincy measure contained in the Plan, i.e., reverting back to the previous wintertime Reid Vapor Pressure maximum for gasoline.
Enclosed are two copies of the letter of commitment from the Nevada Department of Agriculture, documentation of public notice requirements, and public comment report. Please forward one copy of enclosed documentation to EPA.


### If you have any questions regarding the aforementioned revision, please contact Robert Tekniepe, DAQEM, at your earliest convenienceat (702)455-4063. Sincerely,

Lewis Wallenmeyer Director
Enclosures BOARD OF COUNTY COMMISSIONCRS Roy Rdd Cho;rmnn
. SusanBmgn Mcr.Choimm Lorry Brow. Tom Collins, Chris Giunchiglioni, Stem Sisalok. LowremeWeekly Virginia Volmfinc PE, Counb ManagerSTATE OF NEVADA TONY LESPER ANCE JIM GIBBONS

Governor

Sparks Otfice: 2150 Frazer Avenue Sparks NV 89431-5566 (775) 688-1166 Fax (775) 688-2533 Las Vegas Office: 2300 McLeod Street Las Vegas NV 89104-4314 (702) 668-4590 Fax (702) 668-4567 

### DEPARTMENT OF AGRICULTURE 405 South 21' Street Sparks, Nevada 89431 Telephone (775)353-3600 Fax (775)353-3661 Website: http://www.agri.nv.gov Director

Elko Office: 4780 E. Idaho Street Elk0 NV 8980 1-4672 (775) 738-8076 Fax (775) 738-2639

June 22,2010
Lewis Wallenmeyer, Director Department of Air Quality and Environmental Management Clark County Government 500 S. Grand Central Parkway Box 55521

### 0 Las Vegas, 

### NV 891 55-521 0

Dear Sir:
This letter constitutes a commitment by the Nevada Departmentof Agriculture to implement the following contingency plan contained in the Clark County Carbon Monoxide Redesignation Request and Maintenance Plan, September2008. Section 175A(d)of the Clean Air Act requires that revisionsto State Implementation Plans (SIP) for maintenance plans must contain contingency provisionsto assure that any violation of NationalAmbient Air Quality (NAAQ) Standards will be promptly corrected. In compliance with that requirement, the contingency measure proposedfor this SIP revision is as follows: Upon approval of an increase to the wintertime Reid Vapor Pressure (RVP) maximum for gasoline as described in 

### CarbonMonoxide Redesignation Request and Maintenance Plan, September 

### 2008, and in the event of a carbon monoxide violation ofNAAQ Standards, the Bureau of Petroleum Technology of the Nevada Department ofAgriculture will request that theNevada Board ofAgriculture revert to the previous wintertime RVP maximum for gasoline.
If a violation of the carbon monoxideNAAQ Standards occurs, Clark County Department of Air Quality and Environmental Management will notify the Bureau ofPetroleum Technology of theNevada Department of Agriculture. 

### As described in Nevada Revised Statute Chapter 233B, because a change to the Nevada Administrative Code (NAC) will be necessary, the Bureau will submit a draft file (amending NAC 590.065 to reflect the previous RVP maximum) to the Nevada Legislative Counsel Bureau (LCB). Petroleum Technology will then seek approval from theNevada Board ofAgriculture to take action.
The Board of Agriculture meets quarterly (normally in March, June, September and December), sothis request will be made atthe first Board Meeting followingnotification, notwithstanding deadlines for submitting agenda items for the Board Meeting.

- -- NEVADA BOARD OF AGRICULTURE Alan Perazzo. Chair: Dairy Dean Baker: Livestock Benny Romero: Livestock Ramona Morrison, Vice-Char: GeneralAgricunure Grady Jones: Pest Control Boyd Spratling. DVM: Lwestock Martin Plaskett' General Farm~ng Jim Snyder : Row Crops Hank Vogler: Sheep PaulAnderson: Petroleum Paul Noe: NurseryAs described in Nevada Revised Statute Chapter 

### 233B, a workshop and hearing will be scheduled and held, to provide for public comment and discussion, following approval of the request by the Board of Agriculture.
Thecomments will be presented to the Board at their next meeting for approval, and the final draft file sent back to LCB for processing, and placement on the agenda of the next meeting of the Legislative Commission.



### If there are any additional questions or comments, Ican be reached at 

### (775)688-1166 x231, or at wstriejewske~aari.state.nv.us.
Respectfullysubmitted,

Director Nevada Departmentof Agriculture 3 -3

NEVADA BOARD OF AGRICULTURE Alan Perazzo. Chair: Dairy Dean Baker: Livestock Benny Romero: Livestock Ramona Morrison, Vice-Chair: GeneralAgriculture Grady Jones: Pest Control Boyd Spratling, DVM: Livestock Martin Plaskett: General Farming Jim Snyder : Row Crops Hank Vogler: Sheep Paul Anderson: Petroleum Paul Noe: NurseryNevada DepartmentofAgriculture 

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: NevadaAniml TheNeMda-d-Has-Tff 4a5~2lsl St,qHksW89431 Cldchereto&wanWdrne6t@d) Swcialtv Crop BIOC~ Grant (word)Vevada DepartmentofAgriculture http://agri.state.nv.t

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## - Notice dIntentto Solicit Public Comment or Requesta Public Hearing -Click hem

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haliutlmfor Stao EM C.ltm&e (pdQ c N.w&ttem Re- Horn Specialty ~ror, BIOC~ Grant(word)



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WbDovelopmntby LMDoSntk D~T WN.~ Dovabprrnt TO- PD~D 

## O CIICL

F

## NOTICE OF INTENTTO SOLICIT PUBLIC COMMENT OR REQUEST A PUBLIC HEARING

From July 12, 2010 untilAugust 11, 2010, the Nevada Departmentof Agriculture is soliciting from all interested persons comment, or a request to hold a public hearing, regarding a contingency plan included in an update of the Clark County CO Maintenance Plan. Inthe case of violations to this updated plan, the contingency calls for a reversion to a gasoline standard codified previously in Nevada Administrative Code section 590.065. See subsection 2 below for the text of the Contingency Plan to be submitted to the EPA.
I. The needfor and the purpose of this notice. The Clark County Department of Air Quality and Environmental Management (DAQEM) has been working with the Environmental ProtectionAgency (EPA) on a revision to a Carbon Monoxide Maintenance Plan, as outlined in Section 175A of the Clean Air Act (CAA). The existing plan called for a maximum vapor pressurefor gasoline of 9.0 pounds per square inch (psi) from October 1 through March 31. This maximum was codified in Nevada Administrative Code chapter 590. Inthe revisionto the maintenance plan, Clark County DAQEM petitioned the Nevada Board of Agriculture to increasethe vapor pressure maximum to 13.5 psi. This change was approved by the Board of Agriculture in December2009, and approved by the Legislative Commission in January, 2010. Section 175A(d)of the CAA states that this plan revision must include contingency provisions in the event of violations to the new standard. As stated inTitle 40 of the Code of Federal Regulations, $51.102, it is required to provide a 30 day periodfor the publicto submit written comment or for a request to be madeto hold a public hearing on this issue.
2. The following is the text of the proposed contingency plan:
This letter constitutes a commitmentby the Nevada Department of Agriculture to implement the following contingency plan contained in the Clark County 

### CarbonMonoxide Redesignation Request andMaintenancePlan, September 2008. Section 175A(d)ofthe Clean Air Act requires that revisions to State Implementation Plans (SIP) for maintenance plans must contain contingency provisions to assure that any violation ofNational Ambient Air Quality (NAAQ) Standards will be promptly corrected. 

### In compliance with that requirement, the contingency measureproposed for this SIP revision is as follows: Upon approval of an increase to the wintertime Reid Vapor Pressure (RVP) maximum for gasoline as described in 

### CarbonMonoxide Redesignation Request andMaintenancePlan, September 2008, and in the event of a carbon monoxide violation ofNAAQ Standards, the Bureau ofPetroleum Technology ofthe Nevada Department ofAgriculture will request that the Nevada Board of Agriculture revert to the previous wintertime RVP maximum for gasoline.
If a violation ofthe carbon monoxide NAAQ Standards occurs, Clark County Department of Air Quality and Environmental Management will notify the Bureau ofPetroleum Technology of the Nevada Department ofAgriculture. As described in Nevada Revised Statute Chapter 233B, because a change to the Nevada Administrative Code (NAC) will be necessary, the Bureau will submit a draft file (amending NAC 590.065 to reflect the previous RVP maximum) to the Nevada Legislative Counsel Bureau (LCB). Petroleum Technology will then seek approval from the Nevada Board of Agriculture to take action.TheBoard of Agriculture meets quarterly (normally in March, June, September and December), 

## /
sothis request will be made at the first Board Meeting following notification, notwithstanding deadlines for submitting agenda items for the Board Meeting.
As described in Nevada Revised Statute Chapter 233B, a workshop and hearing will be scheduled and held, to provide for public comment and discussion, following approval of the request by the Board ofAgriculture.
The comments will be presented to the Board at their next meeting for approval, and the final draft file sentback to LCB for processing, and placement on the agenda of the next meeting of the Legislative Commission.



### 3. Ifthe action is required pursuant to federal law, a citation and description of the federal law. As stated in subsection 1 above, Section 175A(d)of the Clean Air Act requires a revisionto a maintenance plan to include contingency provisions. Likewise, Title 40 of the Code of Federal Regulations, 551.102 requires a 30 day period for the public to submit written comment or for 

### a request to be made to hold a public hearing on this issue.

Persons may address their comments, or request that a public hearing be held, by submission in writtenform, to

. 

### Nevada Department of

### Agriculture 

### 2150 Frazer Avenue Sparks, 

### NV 89431 

### ATTN: William Striejewske wstriejewske@agri.state.nv.us Written comments or requests for public hearing must be received by the Nevada Department of Agriculture on or before the close of businessAugust 11, 2010. If there is no request for a public hearing, the Nevada Department of Agriculture will announce that fact on the department website, at htt~:llaqri.nv.qovl, following the deadline date given above. Information about the public comment period and whether a hearingwill be held or not will also be available by calling the Nevada Departmentof Agriculture Weights & Measures office at (775) 688-1166.
A copy of this notice and the proposed Contingency Planwill be on file at the State Library, 100 Stewart Street, Carson City, Nevada, for inspection by members of the public during business hours.This notice can also be viewed on the Department of Agriculture website, htt~:Naqri.nv.qov/, as well as at the Department of Agriculture offices in Sparks, Elko, and Las Vegas between the hours of 8:00 a.m. and 500p.m. Monday through Friday.
Nevada Department of Agriculture Nevada Department of Agriculture 405 South 2 1" Street 2300 McLeod Sparks, NV 89431 Las Vegas, NV 89104 Nevada Department of Agriculture Nevada Department of Apculture 4780 E. Idaho Street 2 150 Frazer Street Elko, 

### NV 89801 Sparks, 

### NV 89431

### inspection and copying by members of the publicduring business hours. Copies of this notice and the proposed regulation will also be mailed to members of the public upon request. A 

### reasonable fee may be charged for copies if it is deemed necessary.

- - - - - - - County Library 553 South Maine Street Fallon, NV 89406 - -- Las Vegas - Clark County Library 833 Las Vegas Boulevard North Las Vegas, NV 89 101 720 Court Street Elko, NV 89801
Esmeralda County Library P.O. Box 430 Goldfield, NV 890 13-0430 Eureka Branch Library P.O. Box 293 10 190Monroe Street Eureka, NV 893 16-0293 Humboldt County Library 85 East 5IhStreet Winnemucca, NV 89445
Lincoln County Library P.O. Box 330 Lyon County Library 20 Nevin Way Yerington, NV 89447 - Mineral County Library P.O. Box 1390 (First & A Street) Hawthorne, NV 89415-1390

P.O. Box 430 (Forth & Crook Street) Goldfield, NV 89013-0430 Tonopah Public Library P.O. Box 449 171 Central Street Tonopah, NV 89049-0449 - -- - Pershing County Library P.O. Box 781 1 125 Central Avenue Lovelock, NV 89419-078 1 Storey County Library P.O. Box 14 95 South R Street Virginia City, NV 89440-0014 Washoe County Library P.O. Box 215 1 301 South Center Reno, NV 89505-2 151 White Pine County Library 950 Carnpton Street Ely, NV 89301

Lander County Library 625 South Broad Street Battle Mountain, NV 89820 Carson City Library 900N. Roop Street Carson City, NV 89701 Douglas County Library P.O. Box 337 1625Library Lane Minden, NV 89423-0337 State Library 100North Stewart Street Carson City, NV 89701 -4285 Smith Valley Library 22 Day Lane Smith, NV 89430 Las Vegas Review Journal Ed Vogel/Capital Bureau 102N. Curry Street Carson City, NV 89703 Nevada Farm Bureau Federation 2165 Green Vista Drive, Suite 205 Sparks, NV 8943 1 Battle Mountain Branch Library P.O. Box 141 Battle Mountain, NV 89820-01 41Comment Period for Contingency Plan as regards Clark County CO M... mailbox:///C//Documents%2Oand%2OSettingshills/Applicaiion%:!OD



### Subject: 

### Comment Period for Contingency Plan as regards Clark CountyCO Maintenance P1 From: 

### William Striejewske 

### <wstriejewske@agri.state.nv.us> Date: 

### Fri, 09 Jul2010 16:29:13 -0700 

# /"/ +zl

To: 

### Keith Wells <kdwells@motorpool.nv.gov>,Yann Ling <yling@mail.co.washoe.nv.us>, Andy Goodrich 

### <agoodric@mail.co.washoe.nv.us>, Lea Rogers <lrogers@rtcwashoe.com>, "Long,Nancy" <nkl@jonesvargas.com>,Crayton Jones 

### <Crayton.Jones@swgas.com>, John Sande <jps@jonesvargas.com>,Deborah Wong <deborah~wong@csaa.com>, "Dennis Ransel (CCAQM)" 

### <"ransel"@co.clark.nv.us>, Duane Sikorski <dsikorsk@mail.co.washoe.nv.us>,"Ed Hamey (NHP)" 

### <ehamey@dps.state.nv.us>, Ellen Shapiro 

### <ESHAPIRO@autoalliance.org>,"Geeser, Michael" 

### <Michael~Geeser@csaa.com>, Gina Grey <gina@wspa.org>, "John Saxon (Haycock)" 

### <JSaxon@HaycockPetroleum.com>,Lawrence Waugh <lawrencew@nellaoil.com>, Jalyn Rowser <Jalyn.Rowser@flyingj.com>, Christy Lew <clew@agri.state.nv.us>, Tom Koehler <tomk@pacificethanol.net>,Norma McCusker <wenergetix@aoI.com>,Robert Tekniepe 

### <tekniepe@co.clark.nv.us>, Randy White <RWhite@co.clark.nv.us>, Bonnie Kaufman <brk@stateside.com>, "Ron Levine (NMTA)"<vegas@nmta.com>,Nick Economides 

### <Nick.Economides@chevron.com>, Russ Kinzig 

### <KinzigR@kindemorgan.com>, "Santana Gonzalez (Chevron)" <sang@chevrontexaco.com>, Shannon Rudolph 

### <srudolph@agri.state.nv.us>, Sigurd Jaunarajas <sjaunara@ndep.nv.gov>, Simone Yuan -Newman 

### <simone.yuan-newman@valero.com>, Michael Ingham 

### <Michael.Ingham248@gmail.com>, "Teri Baltisberger (DMV)" <tbaltisberger@dmv.nv.us>, 

### "Victor Dugan (ExxonMobil)" 

### <victor.m.dugan@exxonmobil.com>, "SandieA. Foley" 

### <safoley@agri.state.nv.us>, Grant Gillham <info@captaing2.com>,Paul Anderson <panderson@hpc.bz>,Paul Richmond <paul@wspa.org>,Tony Lesperance 

### <tlesperance@agri.state.nv.us>, Marie Kaddell 

### <marie.kaddell@lexisnexis.com>, Peter Krueger 

## - i3PublicAffairs 

### <peter@i3publicaffairs.com>, David Patterson 

### <David.Patterson@na.mitsubishi-motors.com>, Lew Gibbs <Imgi@chevron.com>, Marilyn Herman <mherman697@aol.com>,Roxanne Johnson 

### <Johnson.Roxanne@EPA.GOV>, Rebecca Richardson <RRichardson@marciv.com>,"Miller, Stephanie"

### <stephanie.miller@lexisnexis.com>, David Kennedy <dak@stateside.com>,Miles Heller <Miles.Heller@bp.com>, "Garcia, Juan M." <JuanGarcia@chevron.com>, "John D. Moms"

### <john.moms@aftonchemical.com>, "JohnM. Cabaniss, Jr." <JCabaniss@AIAM.org>,Marlene Lockard 

### <marlene@capital-strategies.us>,moe Truman <moe@panwestern.com>, Stacy Howard 

### <stacy.howard@aopa.org>, Adele Malone <amalone@ndep.nv.gov>,Paul Anderson <panderson@hpc.bz>,Dean Baker <deanbaker@peoplepc.com>, Martin Plaskett 

### <diamondvalleyhay@yahoo.com>, Ramona Momson <rhmonison@sbcglobal.net>, Alan Perazzo <aperazzo@cccomm.net>,Paul Noe <paulnoe@stamursery.com>,"Boyd Spratling,DVM" <boyddvm@wellsrec.net>,Hank Vogler <needmoresheepco@yahoo.com>,"Katie S. Armstrong" <KArrnstrong@ag.nv.gov>



## NOTICE OF INTENT TO SOLICITPUBLIC COMMENT OR REQUEST A PUBLIC HEARING

From July 

### 12, 20 10until August 1 

### 1,2010,the Nevada Department ofAgriculture is soliciting from all interested persons comment, or a request to hold a public hearing, regarding a contingency plan included in an update ofthe Clark County COMaintenance Plan. In the case of violations to this updated plan, the contingency calls for a reversion to a gasoline standard codified previously in Nevada Administrative Code section 

### 590.065. See subsection 2 below for the text of the Contingency Plan to be submitted to the EPA.


### 1. The need for and the purpose of this notice.Comment Period for Contingency Plan as regards Clark County CO M... mailbox:l~lC(lDocuments%2Oand%20Settings/billslApplication%2OD 

# M,GLTZO~ 1G 

# Mbr~d 

# 6 

# 4-0

# h& ID a5 

# / The Clark County Department of Air Quality and EnvironmentalManagement (DAQEM) has been 

## 2, 

# 62
\ - working with the Environmental Protection Agency (EPA) on a revision to a Carbon Monoxide 

### (9 ' Maintenance Plan, as outlined in Section 175A of the Clean Air Act (CAA). The existingplan called for a maximum vapor pressure for gasoline of 9.0 pounds per square inch (psi) from October 

### 1 through March 3

### 1. This maximum was codified in Nevada Administrative Code chapter 590. 

### In the revision to the maintenance plan, Clark County DAQEM petitioned the Nevada Board of Agriculture to increase the vapor pressure maximum to 13.5psi. This change was approved by the Board of Agnculture in December 2009, and approved by the Legislative Commission in January, 2010. Section 175A(d)ofthe CAA states that this plan revision must include contingency provisions in the event ofviolations to the new standard.
As stated in Title 40 ofthe Code of Federal Regulations, 55 1.102, it is required to provide a 30 day period for thepublic to submit written comment or for a request to be made to hold a public hearing on this issue.


### The complete notice ofintent has been attached to this e-mail. Regards,



## -- William S. Striejewske Senior Petroleum Chemist Nevada Department ofAgriculture Measurement Standards

## - Petroleum Technology (775) 688-1 166ext. 

### 23 1;Fax: (775) 688-2533 Cell: (775) 846- 1 166 

### wstriejewske@,agri.state.nv.us William Striejewske

### <wstrieiewske@agri.state.nv.us> SenlorPetroleum Chemist Bureau of Petroleum Technology Nevada Department ofAgriculture

- -- - -. - -- . I I 

### Content-Type: application/msv NOTICE OFINTENT 

# - Public Comment

### for Contingency.doc Content-Encoding:base64

## PUBLIC COMMENT REPORT
Letter of Commitmentfrom the Nevada Department of

### Agriculture (NDoA)
Public Notice: Home webpage ofNDoA (www.agri.state.nv.us) NDoA offices statewide Nevada public libraries statewide Electronic mailing to petroleum industry and federal/state/localgovernment stakeholders Public Comment Period: July 12,2010to August 11,2010
Formal CommentsReceived: None Informal Comments Received: British Petroleum, Miles Heller, email dtd. July 12, 20 10
There were no formalpublic commentsreceived regardingthe letter of commitment from the Nevada Department of Agriculture to implement a contingency measure contained in 

### the Clark County CarbonMonoxide RedesignationRequest andMaintenance Plan, 

### September2008. 

### British Petroleum (BP) however, sought clarification of 

### said action during the public comment period.
INFORMAL COMMENTS RECEIVED

### FROM BP AND NDoA RESPONSE


### While BP stated they "welcome[d] the change" they wanted to make sure they maintained a "contingency plan" in the event it was necessary "for switching back



## .. . in the shortest time anticipated." Therefore BPS questions consisted of clarification with regards to timelines for reverting back (roll-back) to the previous wintertime Reid Vapor Pressure (RVP) 

### maximum for gasoline in 

### the event of a carbon monoxide violation(s). A 

### summaryofthe questionscontained in BPSemails and NDoAs responses are as follows:
1. What is the shortest time from exceedence to reinstituting the RVP 9.0 psi limit? Based on the frequency of NDoA Board meetings (quarterly), BP assumes it could easily be done within a winter-blending season, especially ifthe exceedence occurs in October or November. Is it one to two months?
NDoA 

### response: NDoA can implement three types of regulations in the NAC; permanent, temporary, and emergency. In earlier conversations with the 

### U.S. Environmental Protection Agency (EPA) it was indicated that a RVP roll-back would most likely need to be implemented no-later-than the following carbon monoxide (CO) wintertime season. As such, NDoA probably would have time to implement a permanent or temporary regulation. In the event an exceedence occurs early in the season (October - 

### November) - 

### and EPA/Clark County Department of Air Quality and Environmental Management (DAQEM) requires the roll-back to occur prior to the end of the CO wintertime season - 

### NDoA would need to implement an emergency regulation. Emergency regulations require the Governor's signature and can only be in effect for 90 days.

### Public Comment Report (Cont)
2. DAQEM has its own Air Quality Regulations (AQR Section 54) that limit fuel sulfur content and aromatics. I believe those have already been suspended by the Clark County Board of County Commissioners. Since the proposed action only addresses RVP limits contained in the Nevada Administrative Code do you know how this action could relate specifically to the AQR Section 54 suspension?
NDoA response: Based on past conversations with DAQEM 

### I deem you are correct; Clark County has suspended AQR Section 54. It is also my understanding from talking with DAQEM that the proposed roll-back of the RVP maximum for gasoline - 

### in the event of a carbon monoxide violation(s) - 

### is a separate action independent of the AQR Section 54 suspension. You may, however, want to contact DAQEM directly to verify this.