or-' 

-y Montana Department of ' 

ENVIDRONMENTALQlJAUTY 

8- P 

Brian Schweitzer, Governor 

Richard H. Opper, Director 

P.O. Box 200901 • Helena, MT 59620-0901 • (406) 444-2544 • www.deq.mt.gov 

July 13, 2011 

James B. Martin 

Regional Administrator 

United States Environmental Protection Agency 

Region VIII, 8P-AR 

1595 Wynkoop St. 

Denver, CO 80202-1129 

Re: Montana Carbon Monoxide Limited Maintena.nce Plan Revisions and Alternative Monitoring Strategy 

Dear Mr. Martin: 

Montana is sUbmitting revisions to the State Implementation Plan. This submission contains the updated 

second 10-year term Great Falls and Billings carbon monoxide (CO) Limited Maintenance Plans (LMP) as 

required by 42 USC 7505(a). This submission also fulfills the criteria set forth in 40 CFR Part 51, Appendix 

V. 

In addition, Montana is proposing changes to the monitoring strategy currently deployed under the subject 

LMPs. As you are aware, ambient levels of CO in Montana and nationwide have decreased precipitously, 

mostly due to federal tailpipe standards and vehicle fleet turnover. Accordingly, the amount of state and 

local resources necessary to continually confirm trace levels of CO no longer justifies the exhaustive and 

resource intensive use of gaseous CO analyzers for such purposes. 

Montana is interested in ensuring that the affected LMP areas maintain compliance with the national 

ambient air quality standards despite decreasing federal grant support. To that end, Montana developed 

and proposes to use an alternative CO monitoring methodology described in the enclosure titled "State of 

Montana Alternative CO Monitoring Strategy." Montana intends to deploy this revised CO monitoring 

strategy as of October 1, 2011. 

If you have any questions regarding this action, please contact the Department's Air Quality Policy and 

Planning supervisor, M. Eric Merchant, by telephone at (406) 444-1457 or by email at emerchant@mt.gov. 

Sincerely, 

d /~-~/'i-l ~:C-.-J Richard H. Opper 

Director 

Enclosure 

c: Dave Klemp, Chief, Air Resources Management Bureau 

M. Eric Merchant, Air Resources Management Bureau RECEIVED 

U.S. EPA Region 8 c/enc: Brian Schweitzer, Governor 

RA's Office 

,JUL ,'" 20 LUI "-'1

Enforcement Division • Permitting & Compliance Division • Planning. Prevention & Assistanee Division • Remediation Division 
State of Montana Alternative CO Monitoring Strategy
 

Surrogate co Monitoring Method 

Montana proposes revisions to the existing carbon monoxide (CO) Limited Maintenance Plans (LMPs) to adopt 

reproducible CO monitoring methods which do not utilize a traditional gaseous analyzer for determining CO NAAQS 

compliance in the CO maintenance areas of Billings, Great Falls and Missoula. The surrogate CO monitoring method will 

include an annual. review of the traffic volumes in each of the CO maintenance areas using the data from the Montana 

Department of Transportation~s(MDT) permanent automatic traffic recorders (ATR) in Billings, Great Falls, and Missoula. 

The Montana Department of Environmental Quality (Department) will compare the latest rolling 3-year monthly average of 

the average daily traffic (ADT) volumes during the traditional high CO concentratio[l season of November through 

February against the baseline ADT average for those months established by the ATR data collected during 2008-2010. 

Contingency Plan 

If the ADT increases by greater than 25% when comparing the most recent, consecutive rolling 3-year period to the 

baseline 2008-2010 period, then the Department will conduct a CO saturation study using portable, non-reference 

samplers to determine the actual CO levels in the ambient air near the former ambient air monitoring site. The CO 

screening study will be conducted the following winter during the November to February period and the results evaluated 

to determine if traditional CO monitoring with a gaseous analyzer should resume in the subject community. 

If the percent increase is not greater than 25%, then the ambient CO concentrations will be presumed to have remained 

relatively unchanged. 

Annual ADT comparison Analysis 

The baseline traffic volume levels for Billings, Great Falls and Missoula were established using the following data sets: 

Rolling 2008-2010 Average Monthly ATR Traffic Volume During November to February 

Month-Year Billings (#A-050) Great Falls (#A-033) Missoula (#A-Q31) 

January 2008 32,778 34123 19413 

February 2008 35463 36,855 20568 

November 2008 35,832 35,675 20,366 

December 2008 32042 33584 19,030 

January 2009 33256 33,820 18,005 

February 2009 35695 36,102 no data 

November 2009 37,121 37110 20,242 

December 2009 33905 34,742 19825 

January 2010 32,340 34,371 20,155 

February 2010 34,317 36576 21 056 

November 2010 33885 34,164 20349 

December 2010 34,317 34,691 19,599 

Average 34,246 35,151 19,813 

The baseline traffic volumes for the 2008 to 2010 time period, by community, are as follows: 

• Billings 34,246 

• Great Falls 35,151 

• Missoula 19,873 

For example, in early 2012, using the ATR data from 2011, new rolling averages will be calculated for the 2009 to 2011 

time period for each community. That new rolling average for 2009-2011 will be compared to the baseline 2008-2010 

average for each community. The ADT data review process will be repeated each year during the annual monitoring 

review and the new rolling 3-year average will be compared to the baseline average from 2008-2010. 
RECORD
 

State Implementation Plan Notice and Comment Process
 

For Great Falls and Billings CO Limited Maintenance Plan
 

TABLE OF CONTENTS
 

(1) Public notice statement. 

(2) Proof of notice to Interested Parties &APCAC (list of parties 

attached) 

(3) Notice as published on DEQ website 

(4) Public cornments 

(5) Great Falls Carbon Monoxide Limited Maintenance Plan 

(6) Billings Carbon Monoxide Limited Maintenance Plan 

Prepared by: Date: 
PUBLIC NOTICE
 

Great Falls and Billings Carbon Monoxide
 

Limited Maintenance Plans
 

1) The Department of Environmental Quality is inviting public comment on the 

proposed submission of revisions to the Great Falls Carbon Monoxide Limited 

Maintenance Plan and the Billings Carbon Monoxide Limited Maintenance Plan 

into the Montana State Implementation Plan (SIP). 

2) Any person may request public hearing on this matter. If the Department 

receives a request for public hearing, a public hearing on this matter will be 

scheduled and the time for that hearing will be announced and another 30 day 

time period for submitting comment will begin. 

5) Interested persons may view the Plans on the Department's website at: 

http://deq.mt.gov/pubcom.mcpx or may call the Department at 406-444-7916 to 

have copies made available for their inspection. 

6) The State of Montana makes reasonable accommodations for any known 

disability that may interfere with a person's ability to participate in state 

government proceedings. Persons needing accommodation must contact Oline 

Barta to advise of the nature of the accommodation needed. Please contact Ms. 

Barta at P.O. Box 200901, Helena, Montana 59620-0901; phone (406) 444-0524; 

fax (406) 444-1499; or email "obarta@mt.gov." 

7) Interested parties may submit their comments concerning the proposal 

described above in writing to the Department by 

•	 addressing them to Oline Barta, 1520 E. Sixth Avenue, P.O. Box 200901, 

Helena, Montana, 59620-0901; 

•	 faxing them to (406) 444-1499; or 

• sending them via email addressed to "obarta@mt.gov." 

To be guaranteed consideration, written comments must be postmarked on or 

before 5 p.m. May 23,2011. 
=1'" "f Montana Department of 

ENVJ(RONMENTAIL QUAL[TY Brian Schweitzer, Governor 

P.O. Box	 20090 I • Helena, MT 59620-0901 • (406) 444-2544 • www.deq.mLgov 

DATE:	 April 20, 2011 

TO:	 Air Interested Parties 

FROM:	 Montana Department of Environmental Quality 

Air Resources Management Bureau 

RE:	 Public Comment on SIP Submission 

PUBLIC NOTICE
 

Great Falls and Billings Carbon Monoxide
 

Limited Maintenance Plans
 

1) The Department of Environmental Quality is inviting public comment on the proposed 

submission of revisions to the Great Falls Carbon Monoxide Limited Maintenance Plan 

and the Billings Carbon Monoxide Limited Maintenance Plan into the Montana State 

Implementation Plan (SIP). 

2) Any person may request public hearing on this matter. If the Department receives a 

request for public hearing, a public hearing on this matter will be scheduled and the time 

for that hearing will be announced and another 30 day time period for submitting 

comment will begin. 

5)	 Interested persons may view the Plans on the Department's website at: 

http://deq.mt.gov/pubcom.mcpx or may call the Department at 406-444-7916 to have 

copies made available for their inspection. 

6) The State of Montana makes reasonable accommodations for any known disability 

that may interfere with a person's ability to participate in state government proceedings. 

Persons needing accommodation must contact Oline Barta to advise of the nature of the 

accommodation needed. Please contact Ms. Barta at P.O. Box 200901, Helena, 

Montana 59620-0901; phone (406) 444-0524; fax (406) 444-1499; or email 

"obarta@mt.gov." 

7) Interested parties may submit their comments concerning the proposal described 

above in writing to the Department by 

•	 addressing them to Oline Barta, 1520 E. Sixth Avenue, P.O. Box 200901,
 

Helena, Montana, 59620-0901;
 

•	 faxing them to (406) 444-1499; or 

• sending them via email addressed to "obarta@mt.gov." 

To be guaranteed consideration, written comments must be postmarked on or before 5 

p.m. May 23,2011. 

Enforcement Division • Permitting "'~ Compliance Division • Planningt Prevention & AssistanCl~ Division • Rcmcdhltion Division 
Air Interested Parties Mailing 

EmailAddr 

2horses@nemontel.net 

Sfriendlyfish@bresnan.net 

Abbie.Krebsbach@mdu.com 

aclark27@bloomberg.net 

adam.poll@tetratech.com 

aday@trinityconsultants.com 

afa nderson@fsJed.us 

ahedges@meic.org 

alexanderrr@cdm.com 

allen@allen-associatesmt.com 

andrea.perez@hexion.com 

apack@aIl4inc.com 

astecpermits@gmail.com 

aussie_northcott@hotmail.com 

azzie_301@hotmail.com 

bayxie@aol.com 

bd hohn@hohneng.com 

bdundas@truecos.com 

beamman60S6@msn.com 

benjamin.recker@tetratech.com 

berrysoup@yahoo.com 

beth_dickerso n@fws.gov 

bettylu@blackfoot.net 

bha beck@mt.gov 

bholland@crowleylaw.com 

bjohnson@summite.com 

blaise.leblanc@hotmail.com 

blakecrk@gmail.com 

bml@stateside.com 

bmontgomery@montana-wcc.com 

bob.vantuyl@ashgrove.com 

boschleicher@mt.gov 

bret@bison-eng.com 

brett@bison-eng.com 

brian.mchugh@tetratech.com 

brian.zieske@malmstrom.af.mil 

brianna@clarkfork.org 

brogers@newfield.com 

Bruce.Krepley@naes.com 

bschmidt@co.missoula.mt.us 

bsoamj@3rivers.net 

BSquires@nicnd.com 

Bstevenson@rosipower.com 

bsublasky@emsl.com 

20-Apr-ll 

FullName_ 

Debbie Madison 

Jack & Pamela Emard 

Abbie Krebsbach 

Aaron Clark 

Adam Poll 

Aaron Day 

Anna Anderson 

Anne Hedges 

Bob Alexander 

Don Allen 

Andrea 

Amy Pack 

Catherine 

robert 

k 

eddy 

Brian Hohn 

Bob Dundas 

Anderson 

Ben Recker 

bonita 

beth dickerson 

Jim Young 

Bob Habeck 

B.Holland 

Bruce Johnson 

Krista Evans 

Becky Lukaesko 

Bob Montgomery 

Bob Vantuyl 

Bob Schleicher 

Bret Gallo 

Brett Gallo 

Brian McHugh 

Brian Zieske 

Brianna Randall 

Brad Rogers 

Bruce Krepley 

Ben Schmidt 

Mary Jane McGarity 

Bruce Squires 

Bruce Stevenson YELp· 

ben 
bullorj@bp.com 

burns.betsy@epa.gov 

bvaughn@montana.com 

c2nites2000@yahoo.com 

calvin.e.kidney@wellsfargo.com 

carl@compliancefreaks.com 

cartoonsmart@mac.com 

cash1230@esaphaseone.com 

cathyl@bkbh.com 

cboe@mt.gov 

cefa rms@tetonwireless.net 

cflanders@nobleenergyinc.com 

chalbert@landauinc.com 

chenine.wozniak@ch2m.com 

cheryllynned@marathonoil.com 

chomer@mt.gov 

chuck.buus@riotinto.com 

chuck@netentrust.com 

chuckp@cskt.org 

cindy_buschman @mccormick.com 

cindymed@hotmail.com 

c1aseur@plainsjustice.org 

cmhd@midrivers.com 

cmrcd@midrivers.com 

coate.carson@epa.gov 

colburnm@ho.missoula.mt.us 

coolnickjr@hotmail.com 

coupscounter@yahoo.com 

cpowell@buysandassociates.com 

cpowell@ltenv.com 

cranecreationsl@yahoo.com 

crose@3rivers.net 

crwindmueller@wtrconsulting.com 

dan.corti@mso.umt.edu 

da rrell.soyars@avistacorp.com 

daveduttonfraser@yahoo.com 

davew@kirkwoodcompanies.com 

david_long@eogresources.com 

dblank@ncpa.org 

dbusby@montanarefining.com 

dcowan@mt.gov 

dcquickdraw@gmail.com 

debbies_design@yahoo.com 

detroit03mm@yahoo.com 

dhart@cleanair.com 

dhrubes@midrivers.com 

diannalin@msn.com 

Robin Bullock 

Betsy Burns 

Barbara Vaughn 

Kermit Snow 

Calvin Kidney 

Carl Williams 

Buddy Rogers 

John Meyers 

Cathy Laughner 

Chris Boe 

Chad Dohney 

Catherine Flanders 

Chip Halbert 

Chenine Wozniak 

Cheryl-Lynne Davis -Marathon Oil 

Charles Homer 

Charles D. Buus 

chuck 

Chuck Page 

Cindy Buschman 

Cindy 

Carrie La Seur 

Mike Rinaldi 

Monty L. Sealey 

Carson Coate 

Mamie Colburn 

randy lahey 

David saylor 

Chad Powell 

Chad Powell 

Julia Crane 

Corrine Rose 

C. Ray Windmueller 

Dan Corti 

Darrell Soyars 

dave 

Dave 

David Long 

Danielle Blank 

Dexter Busby 

Devin Cowan 

Devin Cowan 

Debra Vetter 

Mike 

Dean Hart 

David Hrubes 

Dianna Lintner 
djohnsonhorne@barrick.com 

dlambrecht@jbrenv.com 

dlorenzen@pioneer-technical.com 

dmunson@mt.gov 

dmyran@montana-wcc.com 

doIan.kathy@epa.gov 

donald.may@tetratech.com 

dpaulsen@ala-nr.org 

dpavuk@crowleylaw.com 

dpowers@summite.com 

drusoff@mt.gov 

dshonerd@multistate.com 

dsimonson@mt.gov 

dsimpson@montana-wcc.com 

dsoehren@bresnan.net 

dsorensen@bozeman.net 

dugiejm@hotmail.com 

dujohnson@mt.gov 

dvanhyningl@msn.com 

dwalsh@mt.gov 

dwatson@rosebudcountymt.com 

dwolfe@mt.gov 

ed@mt.net 

ed madler@hotmail.com 

edward.hookl@montana.edu 

eemc@bresnan.net 

eisele.adam@epa.gov 

elbrunner@gmail.com 

emcrae@fageninc.com 

emerchant@mt.gov 

emilieboyles@yahoo.com 

eric.detmer@cldpk.com 

esa@platts.com 

fc rowley@doneylaw.com 

fotto@ups.com 

frank@shumaker.psemail.com 

gabe.johnson@riotinto.com 

gaila_consulting@msn.com 

gcm@sierraresearch.com 

geraldschlosser@benefis.org 

gjackson@emittechnologies.com 

gjg@ecocion.com 

gmcgann@co.carbon.mt.us 

Greg.brown@chsinc.com 

greg.hildebrand@ttemi.com 

grey_nicolls@hotmail.com 

grodway@bison-eng.com 

Deborah Johnson-Horne 

David Lambrecht 

Diane Lorenzen 

Darren Munson 

Darrel Myran 

Don May 

Dick Paulsen 

D.Pavuk 

Dan Powers 

Dave Rusoff 

David Shonerd 

Dave Simonson 

Dave Simpson 

Doug Soehren 

Dewey Sorensen 

Jeff 

Dusti 

Dyrck Van Hyning 

Dan Walsh 

Daniel D. Watson 

Deb Wolfe 

Ed Santos 

Edward Madler - APCAC 

ej hook 

Dave Wang 

Adam Eisele 

Erica Brunner 

Edward McRae 

Eric Merchant 

emilie boyles 

Eric Detmer 

Esa 

Frank Crowley 

Friedheim Otto 

frank 

Gabe Johnson 

Gail Abercrombie 

Gabe McAuliffe 

Gerald Schlosser 

Gary Jackson 

Gary Gates 

Gregory McGann 

Greg Brown 

Greg Hildebrand 

robert 

Grant Rodway 
hbedbury@montanarefining.com 

hestmark.martin@epa.gov 

hhsgreengroup@gmail.com 

hkaiser@hydrometrics.com 

hpeterson@mtech.edu 

hrash@mt.gov 

hrobbins@bison-eng.com 

info@kakuk.com 

info@lion.com 

info@northernplains.org 

j.castro@cLburbank.ca.us 

Jackie.Flikkema@Kniferiver.com 

jacl<ross@nemontel.net 

jade.stokke@riotinto.com 

Hadley Bedbury 

Martin Hestmark 

HHS Green Group 

Heidi Kaiser 

Holly Peterson 

Hoby Rash 

Hal Robbins 

Michael Kakuk 

Lion Technologies 

Northern Plains Resource Council 

Jessica 

Jackie Flikkema 

Jack Ross 

Jade Stokke 

Jagadeesan.Sethuraman@whiting.cor Jagadeesan Sethuraman 

jahughes@mt.gov 

jajehn@marathonoil.com 

jake.weirich@edaw.com 

jakenny@mt.gov 

jamie.christopher@aecom.com 

jamie.gaboriau@riotinto.com 

jamiew@slservices.net 

JasMatthews@msn.com 

javid@mod2.com 

jcarlin@mt.gov 

jcarlson@co.missoula.mt.us 

jchaffee@bison-eng.com 

jcoefield@mt.gov 

jdorris@mt.gov 

jean.semborski@conocophillips.com 

jeannehallesy@yahoo.com 

jeff.briggs@ashgrove.com 

jeff@ajaxcomputernetworking.com 

Jenna_k_02@hotmail.com 

jennifer.cinq-mars@ang.af.mil 

jennifer.pin@riverstonehealth.org 

jennifergoldman@ogap.org 

jenomara@mt.gov 

jfdowns@babcock.com 

jford2@mt.gov 

Jiakun.Zhang@stjude.org 

jilesejibril@yahoo.com 

jillgrenon@yahoo.com 

jjones@bwenergylaw.com 

jli@mt.gov 

jmariepatrick@3rivers.net 

JMBlanco@marathonoil.com 

Jim Hughes 

John Jehn 

Jake Weiriich 

Jake Kenny 

Jamie Christopher 

jamie gaboriau 

Jamie Whiteman 

James Matthews, M.D. 

Javid Nia 

Jim Carlin 

Jim Carlson 

Jeff Chaffee 

John Coefield 

Joshua Dorris 

Jean Semborski 

Jeanne 

Jeff Briggs 

Jeff 

Jenna Loring 

Jen 

Jennifer Pinnow 

Jennifer Goldman 

Jenny O'Mara 

John Downs 

McCloud (Joe) Ford 

Jiakun Zhang 

Jilese 

jill grenon 

julia jones 

Janet Li 

June Patrick 

Julius Blanco 
jmerkel@mt.gov Julie Merkel 

jmparker@pplweb.com Jim Parker 

Joe@shumaker.psemail.com Joe Aline 

JOELKelm@msn.com Joel Kelm 

John@SenatorJohn.net John Brueggman 

johnJei@ibew.org John Lei 

- APCAC 

jon.madison@mdu.com Jon madison 

jonnysanty@gmail.com Jonny Santy 

joseph.w.lierow@exxonmobil.com Joe Lierow 

josephfdepaz@yahoo.com Joseph F. de Paz 

jrussell@flathead.mt.gov Joe Russell 

jscott@cherrycreekradio.com Jay Scott 

jsites@crowleylaw.com J. Sites 

jugorowski@mt.gov Joe Ugorowski 

Kalle.Kuether@mdu.com Kalle Kuether· 

karen@netentrust.com karen 

katrina_winborn@urscorp.com Katrina Winborn 

kdavid@flathead.mt.gov Kelly David 

kenre@comcast.net Kenneth Reeves 

Kevin.Pilger@taqa.ca Kevin Pilger 

kgehret@perkinscoie.com Kate Gehret 

kgessaman@mt.gov Kathy Gessaman 

khooper@libby.org Kathy Hooper 

kirstLgilmour@hotmail.com Kirsty Gilmour 

kmoore@co.lewis-c1ark.mt.us Kathy Moore 

korr@mt.gov Katherine Orr 

krandall@fvcc.edu Katie Randall 

krobertson@mjbradley.com KRobertson 

ksolberg@anacondadeerlodge.mt.go\ Karen Solberg 

kwalsh@enviroconsult.com Kevin Walsh 

kwebb@m-m.net Kristi Webb 

larry@montanasulphur.com Larry Zink 

Iclark@fsJed.us Lori Clark 

leah.bennett@rocketmail.com Leah Bennett 

lee@prrlaw.com Lee Bruner 

lepodal@yahoo.com Debbie Lepo 

LGlatz@mt.gov Glatz, Linda 

Ihendley@co.lewis-c1ark.mt.us L Hendley 

Iibrary@crowleylaw.com Crowley Law 

Iindsay.spurlock@riotinto.com Lindsay Spurlock 

Iisasandoval@contres.com Lisa Sandoval 

Ijordan@rc.mt.gov Lea Jordan 

Ikambham@trinityconsultants.com Latha kambham 

lIaknar@co.beaverhead.mt.us Laknar 

lIoken@wpcnd.com Lance Loken 

Imoody@all-lIc.com Lee Moody 

Imoral@trinityconsultants.com Lani Moral 

r 
Inguyen@trinityconsultants.com 

lonnie.fallin@jacobs.com 

Istuder@stmaryland.com 

Iweeks@nemont.net 

Iza nto@mt.gov 

macka_maka@hotmail.com 

marcellama@cskt.org 

Margaret.Zebley@aecom.com 

margaret@montanasulphur.com 

mark.lin@gmail.com 

mark@aspence.net 

markschaffer57@hotmail.com 

mary.blel@chsinc.com 

mbarton@co.missoula.mt.us 

mbasta@greatfallsmt.net 

mbayne@abraxaslusk.com 

mbrown@ap.org 

mcferrins@mt.net 

megan.siems@sierraclub.org 

mhillman@trinityconsultants.com 

mhoffman@jeffco.mt.gov 

michelle@skyride.net 

mike.simpson2009@gmail.com 

miosh_com@yahoo.com 

MitcheII.Leu@plumcreek.com 

mlct@mt.net 

mmca@mttrucking.org 

montanabobcat@gmail.com 

mpa@montanapetroJeum.org 

mpainter@ci.missoula.mt.us 

mpontiff@newfield.com 

mraile@montanarefining.com 

mrlambrecht@pplweb.com 

msimonich@helenahar.com 

mtaudubon@mtaudubon.org 

muncie1929@itstriangle.com 

mwignot@hydrometrics.com 

nathon@bison-eng.com 

Nick.Lawyer@montana.com 

nickgeranios4317@msn.com 

nturnbuIl2@gmail.com 

obarta@mt.gov 

parker-christensen.victoria@epa.gov 

Parkside@bigsky.net 

Pat.kimmet@chsinc.com 

pat@crowleyconsultants.com 

patels3@hotmail.com 

Linda Nguyen 

Lonnie Fallin 

luke 

Linda Weeks 

Lynn Zanto 

robert 

Marcella Mahseelah 

Margaret Zebley 

Margaret 

Mark 

Mark C. Peterson 

mark schaffer 

Mary Blel 

Michael Barton 

Martin Basta 

Marc Bayne 

Matt Brown 

Felecity McFerrins 

Megan Siems 

Melissa Hillman 

Michael G. Hoffman II 

michelle Hartly 

Mike Simpson 

Ken Liston 

Mitchell Leu 

Alec Hansen 

Montana Motorcarriers 

Bob 

Dave Galt 

Michaell. Painter 

Mike Pontiff 

Mike Raile 

Mark Lambrecht 

Mark Simonich 

Montana Audubon 

Muncie Morger 

Michael Wignot 

Nathon 

Nick Lawyer 

Geranios Enterprises Inc 

Neil Turnbull 

Cline Barta 

Victoria Parker-Christensen 

Jennifer Swearingen 

Pat Kimmet 

Pat Crowley 

patel 
patty@johnsonlanematerials.com 

pa uldsherrpc@yahoo.com 

pcollins@crowleylaw.com 

phippsangela@stanleygroup.com 

pjsimonich@pplweb.com 

pkukay@hotmail.com 

pmckenzie@stoltzelumber.com 

randall.j.richert@conocophillips.com 

rdaniel@rc.mt.gov 

rdriear@centurytel.net 

rebecca@bison-eng.com 

rebecca@northernplains.org 

redtail47@gmail.com 

reed.j.marton@conocophillips.com 

rfink@co.carbon.mt.us 

rgilson@cbmainc.com 

rhughes@rmsmanagement.com 

Rick.Walsh@Northwestern.com 

rjeffrey@mt.gov 

rkenyon@cgrs.com 

roa rk@imt.net 

ron.hyatte@riotinto.com 

ronald.nadwornick@mt.usda.gov 

ross.whelchel@northwestern.com 

rr@hayfam.com 

rsouthwick@gr-northern.com 

Runningelkcliff@aol.com 

russb@ycchd.org 

ruthjensen@transcanada.com 

RWeimer@stillwatermining.com 

sabrina_rojas@hotmail.com 

sabskb@gmail.com 

saraw@jntermountain.org 

sbombard@natlforests.org 

sbrown@aquionix.com 

Shannon.morgan@rosi-boise.com 

shatten@mt.gov 

sherry.bursey@anadarko.com 

sjohnson@co.cascade.mt.us 

smason@hydrometrics.com 

smullins@industrialinfo.com 

sn owa kowski@mt.gov 

sobrien@oasisemission.com 

solsen@mt.gov 

srubino@sc.rr.com 

ssternberg@mt.gov 

Stacy.aguirre@wbip.com 

Patty 

Paul 

P. Collins 

Angela Phipps 

Pete Simonich 

Paul Kukay 

Paul R. McKenzie 

Randall Richert 

Rod Daniel 

Ralph Driear 

Rebecca 

Rebecca Fischer 

Jo Ellis 

Reed J. Marton 

Rodney Fink 

Robert Gilson 

Rose Hughes 

Rick Walsh 

Robert Jeffrey 

Randy Kenyon 

Carol Lee-Roark 

Ron Hyatte 

Ronald Nadwornick 

Ross Whelchel 

C.E.Robertson 

Rich Southwick 

Running Elk 

Russ Boschee 

Ruth Jensen 

Randy Weimer 

Sabrina 

Scott and Sheree Bombard 

sara wakefield 

Sheree Bombard 

Sean Brown 

Owen Orndorff -YELP 

Skye Hatten 

Sherry 

Sandy Johnson 

Scott Mason 

Shane Mullins 

Sonja Nowakowski 

Shawna O'Brien 

Sandi Olsen 

srubino 

Stan Sternberg 

Stacy Aguirre 
stellaholt@live.com Stella 

ste phentsmith@earthlink.net Stephen T. Smith 

stevew@bkbh.com Steve Wade 

susa nalise@cox.net Susan 

sutherlin1971@earthlink.net Sandra Sutherlin 

swright@cfaluminum.com Steve Wright 

szehntner@mt.gov Steve Zehntner 

tadd.berger@erm.com Tadd Berger 

tdzomba@fs.fed.us Thomas Dzomba 

teve rts@mt.gov Todd Everts 

thod ik@centurypaving.com 

tiphlmiller@yahoo.com Tiphanie Keefe 

tjewett@NPCA.ORG Tony Jewett 

tkircher@stillwatermining.com Tom Kircher 

Todd.O'Hair@bigsky.net Todd O'Hair 

todd.rudolph@aecom.com Todd 

todg@cordite.com Tod Glenn 

townofalberton@blackfoot.net Diane Jodsaas 

tquarles@retec.com Tim Quarles 

traciebuhl@fs.fed.us Tracie 

twidboom@barr.com Tony Widboom 

victor.m.dugan@exxonmobil.com Victor M. Dugan 

videtich.callie@epa.gov Callie Videtich 

walkers@ci.billings.mt.us Scott Walker 

Wburget@peabodyenergy.com Wanda Burgett 

whitem@dawsoncountymail.com Mike While 

wildcovenants@msn.com linda Dwarak 

william.thompson@northwestern.cor Bill Thompson 

wjacobs@flathead.mt.gov Wendee Jacobs 

wlneumiller@pplweb.com Bill Neumiller 

wlreynolds@bresnan.net William Reynolds 

woodproducts@mt.net Ellen Engstedt 

woodwardjj@cdm.com Jesse Woodward 

wwmercer@hollandhart.com bill mercer 

yardleysandra@hotmail.com Sandra Yardley 

yoonyoung.choi@mcdean.com Yoonyoung Choi 
Members: 

Bud Clinch 

Carol Kenney 

Cathy Atkins 

Cliff Runningelk 

Don Potts 

Don Powers 

Erik Suffridge 

John Sesso 

Kevin Fetherston 

Lori Bocchino 

Mike Ellitt 

Mike Philbin 

Mikel Siemens 

Rick Larson 

Rick Stefanic 

Tim Roark 

William Rogers 

mtcoal@aol.com 

carolsrainbow@aol.com 

cathy.atkins@rma.army.mil 

runningelkcliff@aol.com 

don.potts@cfc.umt.edu 

dpowers@bsb.mt.gov 

erik. sUffridge@mt.usda.gov 

jsesso@bsb.mt.gov 

kfetherston@bna.com 

Ibocch@wyo.gov 

plessie.ellitt@usmc.mil 

Mike_Philbin@blm.gov 

mikel@rlkhydro.com 

ricklarson@bsb.mt.gov 

rick.stefanic@bia.gov 

Tim. Roark@gallatin.mt.gov 

william.rogers@deq.idaho.gov 

~~ tf(c<O//1 

~/.JU' ~~£'

2 
rEPHEN BLANKENSHIP FORD
 

~5 L ST STE 390
 

~CRAMENTO CA 95814
 

~MES FLANSBURG
 

AYS LODGE POLE SCHOOLS
 

OX 110
 

AYS MT 59527
 

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o BOX 97
 

OLSTRIP MT 59323
 

t\MMY JOHNSON 

NVIRONOMICS INC 

o BOX 1026
 

IHITEHALL MT 59759
 

:RRY D. KNUTSON 

lEST TECH SUPPLY & SERVICES 

o BOX 80711
 

ILUNGS MT 59108
 

,,....LTER L MCNUTT
 

G EQUIPMENT SALES
 

10 12TH AVE SW
 

IDNEY MT 59270
 

ILA TAYLOR
 

C 42 BOX 595
 

USBY MT 59016
 

DALE COCKRELL
 

CHRISTENSEN MOORE COCKRELL
 

PO BOX 7370
 

KALISPELL MT 59904-0370
 

ALAN FRONBERG
 

GLACIER ENGINEERING PC
 

1241ST AVE S STE 17
 

GREAT FALLS MT 59401
 

JOHN GERHART
 

PO BOX 283
 

BELT MT 59412
 

DICK JUNTUNEN
 

RESOURCE MGMT ASSOCIATES
 

259 MCCLELLAN CREEK RD
 

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MICHAEL J LUCIANO
 

FARM HARVESTING OF EUREKA
 

PO BOX 1050
 

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NEIL TURNBULL
 

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BARB DOWSKI
 

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PO BOX 659
 

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LYNN HILL
 

MSE-HKM INC
 

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BOB KELLY
 

INTERTEC
 

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ETS INTERNATIONAL
 

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ROANOKE VA 24012-1309
 

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Public Comment Periods 

By Subject or Program: 

iii! Ai I' QualiN Permits
 

Draft TMDL Reports
 

II1l Major Facility Siting (MFS)
 

II1l Water Quality Discharge Permits
 

iii! Nutrient fIolanagement Plans
 

The documents listed in the links above are not included in the list below. 

Downl'oad Acrobat Reader to view the pdf documents. 

Great Falls and Billings CO Umited 

Maintenance Plan 

(LMP) 

Public Notice 

May 23,2011 Montana Department of 

Environmental Quality 

1520 E. 6th Avenue 

P.O. Box 200901 

Helena, MT 59620 

Billings LMP 

Great Falls LMP 

aline Barta 

MT-DEQlARMB 

PO Box 200901 

~Iena, MT 5962.0-0901 

Phone: (406) 444-0S24 

Bozeman Solverlt Site Proposed Plan 

and Draft Final FeasibilIty Study 

March 29, 2011 Montana Department of 

Environmental Quality 

1100 N Last Chance Gulch 

Helena, MT 59620-0901 

Kate Fry Montana Department of 

Environmental Quality P. O. Box 200901 

Helena, MT 59620-0901 

Phone: (406)841-S066 

Finding of No Significant Impact for 

the City Of Bozeman water Treatment 

Plant Improvements PrOTect 

April 1, ZOl1 Montana Department of 

Environmental Quality 

1520 E. 6th Avenue 

P.O. Box 2.00901 

Hetena, MT 5962.0 

Gary J. Wiens. P.E. 

Montana Department of 

Environmental Quality 

P. O. Box 200901 

Helena, MT 59620-0901 

I Phone: (406)444-7838 

Draft Environmental Assessm~

(EA) documents for the O'Nefroal 

Qutcrop FIre In Pralne County 

February 25, 2.011 Montana Department of 

Environmenta! Quality 

1100 N Last Cnance Gulch 

Helena, MT 59620-0901 

Mike Glenn 

(406) 841-S070 

Fax: (406) 841-S0S0 

, 

Findin%f0,f No Significant Imoa4 for 

Town Eureka Water System 

Improvements PrOTect 

February 6, 2011 1520 E. 6th Avenue 

P.O. Box 200901 

Helena, MT 5962.0 

Mark Smith. P. E. 

Montana Department of 

Environmental Quarity 

P. O. Box 200901 

Helena, MT S962.0-0901 

Phone: (406)444-5325 
NO PUBLIC COMIVIENTS WERE RECEIVED FOR THE STATE IMPLEMENTATION PLAN
 

FOR GREAT FALLS OR BILLINGS
 
Volume II 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

SUbject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

7.10 GREAT FALLS CARBON MONOXIDE LIMITED 

MAINTENANCE PLAN 

Replaces Page: 7.10 (1) Dated: December 19, 2000 

TBD Page: 1 of 1 

Page 7.10 (1) 
Volume II 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

7.10.1 Introduction 

As a result of the 1977 amendments to the Clean Air Act (CM), Great Falls was 

designated as nonattainment for carbon monoxide (CO) by the U.S. Environmental 

Protection Agency (EPA) in a Federal Register (FR) notice (45 FR 59315) on 

September 9, 1980. The National Ambient Air Quality Standard (NMQS) for CO is 9 

parts per million (ppm) for an 8-hour average concentration, not to be exceeded more 

than once per calendar year. 

Following the nonattainment designation, control plans were developed but none were 

approved by EPA. The Great Falls CO nonattainment issue was reevaluated in 

September 1990 based on the requirements in the 1990 amendments to the CM and 

the lack of exceedances in the 1988 and 1989 CO monitoring data. In the November 6, 

1991 FR (56 FR 56799), Great Falls was listed as a "Not Classified" CO nonattainment 

area (NM). However, EPA's redesignation process required a new EI (EI) and 

development of a maintenance plan. 

The Montana Department of Environmental Quality (Department) developed a 

redesignation request with guidance based on the 1990 CM amendments and a 

September 4, 1992 EPA memo from John Calcagni to the EPA Regional Air Directors. 

The Governor of Montana submitted the redesignation request to EPA on February 9, 

2001, and EPA approved it in the May 9,2002 FR (67 FR 31143). Section 107(d)(3)(E) 

of the CM defines the five required criteria of a redesignation request. The criteria are 

as follows: 

Criterion 1: Attainment of the Applicable National Ambient Air Quality Standard 

Criterion 2: State Implementation Plan Approval 

Criterion 3: Permanent and Enforceable Improvements in Air Quality 

Criterion 4: Fulfillment of CAA Section 110 and Part 0 Requirements 

Criterion 5: Fully Approved Maintenance Plan under CAA Section 175A 

Replaces Page: 7.10.1 (1) Dated: December 19, 2000 

TBD Page: 1 of 2 

Page 7.1 0.1 (1) 
Volume II 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

SUbject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

Criterion 5 is addressed based on fulfillment of criteria addressed in the October 6, 

1995 EPA memo from Joseph Paisie, Group Leader for Integrated Policy and 

Strategies Group. That memo stated nonclassifiable CO nonattainment areas fUlfilling 

specific criterion could choose to seek redesignation under a limited maintenance plan 

(LMP) rather than the more rigorous full maintenance plan. At the end of 2009, Great 

Falls still met the LMP criterion as outlined in the Paisie memo by having a CO design 

value at or below 7.65 ppm (85 percent of the 8-hr NAAQS). 

Under the LMP option of CAA Section 175A, after the initial 1O-year period, States are 

required to submit a revision or update to the LMP for another 10-year period. The 

Department has updated the 2002 Great Falls CO LMP and the revisions are discussed 

under the following five provisions. 

Replaces Page: 7.10.1 (2) Dated: December 19, 2000 

TBD Page: 2 of 2 

Page 7.10.1 (2) 
Volume" 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

7. to.6.1 Provision 1: Attainment Inventory 

On February 1, 2000, the Department submitted an EI for 1996 to EPA as part of the 

Great Falls CO redesignation request. The CO emissions in the EI were calculated to 

represent a standard CO season day, a typical 'winter day' in a typical 'CO season' for 

the base year of 1996 (January 1 to December 31). The CO season covered the 

months of November, December, and January 1996. A weekday during the CO season 

was selected since the highest average daily traffic (ADT) generally occurs during the 

work week (i.e., Monday - Friday). The study area included 150 one-kilometer squared 

(km2

) grids which included the Great Falls NAA, and the greater Great Falls urban area, 

including the community of Black Eagle. 

The total amount of CO emissions estimated in the 1996 Great Falls CO EI study area 

on a standard CO season weekday was 53,945.52 kilograms (kg). Twenty-four area 

and three industrial point sources were identified as significant CO emitters. These 

sources were assigned to seven broad categories: aviation exhaust (721.21 kg/day), 

commercial and residential natural gas combustion (312.62 kg/day), industrial point 

sources (180.46 kg/day), nonroad motor exhaust (4,676.0 kg/day), railroad locomotive 

exhaust (24.30 kg/day), residential wood burning (5,644.12 kg/day), and roadway motor 

vehicle exhaust (42,386.81 kg/day). 

Motor vehicle exhaust contributed the majority (78.57 percent) of all estimated CO 

emissions. Minor contributing source categories and their corresponding daily 

percentage of contribution were residential wood burning devices (10.46 percent), 

nonroad motor exhaust (8.67 percent), and aviation exhaust (1.34 percent). 

Commercial and residential natural gas combustion, railroad locomotive exhaust, and 

three industrial point sources all emitted less than one percent of the estimated daily 

CO emissions in the 1996 Great Falls CO EI study area. 

The 1996 CO EI used estimates of actual emissions and the 2009 CO EI update was 

developed with surrogates applied to the 1996 EI emissions, except for the industrial 

point sources where actual emissions were obtained from the Department's permit fees 

database (CEDARS -Consolidated Environmental Data Acquisition and Retrieval 

System). The emissions were again divided into seven source categories: aviation 

Replaces Page: 7.10.6.1 (1) Dated: December 19, 2000 

TBD Page: 1 of 7
 

Page 7.10.6.1 (1)
 
Volume II 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

exhaust, commercial and residential natural gas combustion, industrial point processes, 

nonroad motor vehicle exhaust, railroad locomotive exhaust, residential wood burning, 

and onroad motor vehicle exhaust. The 1996 EI was updated to 2009 levels using a 

combination of factors such a population growth, change in traffic volumes, and the 

results of the most recent EI of industrial point sources, which are discussed below. 

Population 

The percent change in the population of Cascade County from 1996 to 2009 was 

selected as a surrogate to estimate the change in emissions for several area source 

categories. Every year by July 1, the Montana Department of Commerce, Census and 

Economic Information Center (CEIC) estimates the population of Montana cities and 

counties using U.S. Census data. As of July 1, 1996, the population of Cascade 

County was estimated at 82,4291 and on July 1, 2009, the county population was 

estimated at 82,1782, a decrease of 0.31% (-0.31%) over the 1996 to 2009 time period. 

Over the same time period, the estimated population of the city of Great Falls 

increased from 57,881 to 59,3663, resulting in a change of 2.50 percent. Department 

staff, using professional judgment, elected to use the change in the city population as 

the more conservative value for estimating increases in certain area source categories. 

Industrial Point Sources 

Table 7.1 0.6.1.A presents the estimated actual 1996 and 2009 emissions for a CO 

season day for the three point sources in the Great Falls CO NAA with their 1996 

operating schedules. For consistency and due to lack of additional information, the 

1996 operating schedules were applied to the annual 2009 emissions. In addition, a 

relatively significant point source was added to this table, the City of Great Falls 

Wastewater Treatment Plant that was not operational in 1996. It should be noted that 

no industrial point sources exit with the Great Fall CO NAA. 

1 http://www.ceic.mt.gov/HistoricaIPopData.asp 

2 http://www.ceic.mt.gov/index.asp 

3 http://ceic.mt.gov/ 

Replaces Page: 7.10.6.1 (2) Dated: December 19, 2000 

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Volume 1/ 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

Table 7.10.6.1.A. Point Source Emissions in the Great Falls CO NAA, 1996 and 

2009 CO Season Days. 

1996 2009 

Actual Actual 

CO CO 

Percent of Season Season 

Emissions (kg 

Hours Daysl . Weeks During CO COICO 

Source Week Near Season da 1 IDa da

(kg 

COICO 

City of Great
 

Falls
 

Wastewater
 

Treatment
 

Plant
 24 7 52 o 0.00 171.85 171.85 4176

Montana Air 

National 

Guard Base 24 7 52 25 28.72 16.69 I - 41.9 2930

Malmstrom Air 

Force Base 24 7 31 44 47.62 103.68 117.8 1427

Montana
 

Refining
 

Com an
 24 7 52 25 104.13 38.43 - 63.09 2161 -- -_~_------ . -

Totals 180.46 329.65 46.17 

1. kg = kilograms. 

Any industrial point source emitting less than 1 metric ton during a CO season day in 

the Great Falls CO NAA was not included in this table for consistency with the approach 

in the development of the initial 1996 Great Falls CO EI. This method eliminated the six 

point sources listed in Table 7.10.6.1.8. If these six sources were included in the 2009 

EI update. their emissions would only represent approximately 4% of the total CO 

emissions from the point sources within the Great Falls CO NAA. 

Replaces Page: I Dated: 

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Page 7.10.6.1 (3)
 
Volume II 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

Table 7.10.6.1.8. Point Sources & Emissions Omitted from the 1996 to 2009 CO 

Season Day Update. 

Permit 

Source 2009 Actual CO Season Number 

Cereal Food Processors, Inc. 1.04 2885 

CHS Incor orated 7.87 2842 

General Mills Flour Mill 0.41 2849 

Great Falls Animal Shelter 0.39 3082 

Montana S ecialt Mills, LLC 1.04 2968 

Westfeeds, Inc. 2.24 3093 ._­

Total 12.99 

1. kg =kilograms. 

Annual Average Daily Traffic 

The mobile source EI surrogate chosen was annual average daily traffic (AADT) 

increases based on data collected over the 1996 to 2009 time period by Montana 

Department of Transportation automatic traffic recorders (ATR) on the roadways in the 

Great Falls CO EI study area4. The three, representative data sets chosen were: 

• 10th Avenue South (U.S. 89) between 9th and 10th Streets, 

• 25th Street North between 4th and 5th Avenues, and 

• 26th Street North between 4th and 5th Avenues. 

These roads are classified as principal arterial and minor arterials (2), respectively. 

Note: the 10th Avenue South arterial is within the Great Falls CO NAA. Table 

7.1 0.6.1.C lists the AADT data collected during the 1999 through 2009 period for these 

three roads. 

4 http://www.mdt.mt.qov/publications/docs/datastats/atr/atrbook09.pdf 

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Page 7.10.6.1 (4) 
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STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

Table 7.10.6.1.C. AADT Data for Selected Roads in the Great Falls CO NAA, 

1996 - 2009. 

Annual Average Daily Traffic 

Year 10th Avenue South 25th Street North 26th Street North 

1996 35,153 4,107 3,530 

1997 35,884 4,141 3,511 

1998 35,457 4,183 3,686 

1999 4,520 3,833 

2000 4,218 3,572 

2001 36,354 4,243 3,535 

2002 37,612 4,205 3,457 

2003 39,071 4,351 3,756 

2004 40,280 4,580 3,730 

2005 38,770 4,060 3,370 

2006 38,330 3,930 3,390 

2007 38,161 3,876 3,229 

2008 37,283 3,741 3,130 

2009 37,378 3,825 3,052 

1996 to 2009.<"1% 6.33 -6.87 -13.54 

The average of all percent changes in AADT for the three roadways over 1996 to 2009 

was - 4.69%. The percent change value of 6.33% from the 10th Avenue South data 

was selected as a representative value for this demonstration since it was derived from 

an ATR within the Great Falls CO NAA. 

Replaces Page: I Dated: 

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Page 7.10.6.1 (5)
 
Volume II 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

The designated Great Falls CO NAA is two (2) blocks wide by about four miles long or 

about 1.5 km2 within the city of Great Falls. The 1996 Great Falls CO EI encompassed 

150 one km2 grids that included the NAA, which was about 1% of the inventoried study 

area. The 1996 EI did not estimate the CO emissions within the NAA, therefore, the 

2009 emissions address the entire Great Falls EI study area. The overall result of the 

Great Falls CO NAA EI update from 1996 to 2009 for a CO season day in kg is listed in 

Table 7.10.6.1.0. 

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Page 7.10.6.1 (6) 
Volume II 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

Table 7.10.6.1.0. Great Falls CO NAA Emissions Comparison between 1996 & 

2009 CO Season Days. 

Source 

CateQorv 

1996 Total 

Emissions 

(kg CO/CO 

day)1 

1996 

Percent 

of Total 

2009 Total 

Emissions 

(kg CO/CO 

day) 

2009 

Percent 

of Total 

Percent 

Change 

1996 to 

2009 Surrogate 

Aviation 721.21 1.34 739.24 1.30 2.50 Population 

Commercial & 

Residential 

Natural Gas 312.62 0.58 320.44 0.56 2.50 Population 

Industrial Point Permit Fee 

Sources 180.46 0.33 263.78 0.46 46.17 EI 

Nonroad 

Motors 4676.00 8.67 4792.90 8.41 2.50 Population 

Railroad 

Locomotives 24.30 0.05 24.91 0.04 2.50 Population 

Residential 

Wood Burninq 5,644.12 10.46 5785.22 10.15 2.50 Population 

Roadway Motor 

Vehicle 42,386.81 78.57 45,069.90 79.08 6.33 AADT2 

TOTAL 53945.52 100.00 56,996.38 100.00 

9.29 

(Averaqe) -­

1. kg = kilograms. 

2. AADT = Annual average daily traffic. 

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Page 7.10.6.1 (7) 
Volume II 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

7.10.6.2 Provision 2: Maintenance Demonstration 

An October 6, 1995 EPA memo from Joseph Paisie, Group Leader for Integrated Policy 

and Strategies Group stated nonclassifiable CO nonattainment areas fulfilling specific 

criteria could choose to seek redesignation under a less rigorous plan than the full 

maintenance plan. To qualify for the LMP option, the CO design value for the area, 

based upon the eight quarters (two years of data) used to demonstrate attainment must 

be at or below 7.65 ppm (85 percent of the 8-hr NAAQS). Additionally, the design value 

for the area must continue to be at orbelow 7.65 ppm until the time of final EPA action 

on the redesignation request. 

Design values are determined based on the procedure outline in a June 18, 1990 EPA 

memo from William Laxton, Director of the Technical Support Division. For the 8-hour 

NAAQS, the design value is determined by the second maximum 8-hour concentration 

value for the most recent two years or eight quarters of data. The larger of the second 

maximum values (or the "highest of the second highs") is used as the design value for 

each CO monitoring site. If more than one monitoring site exists in the area, the 

highest site design value is used as the design value for the entire NAA. 

For the development of the initial Great Falls CO LMP, there was only one monitoring 

site, Skyway Conoco at 700 10th Avenue South, operating in the Great Falls CO 

nonattainment area during 1998 and 1999. For the initial LMP, the "highest of the 

second highs" was monitored in 1998 with a design value of 4.5 ppm. Since that design 

value was below the 7.65 ppm limit, the Great Falls CO NAA met the eligibility criterion 

for a LMP. 

Over approximately the next decade, another CO monitoring site, Overlook Park, 

operated in the Great Falls area. The Department documented the installation and 

removal of the Overlook Park and Skyway Conoco sites, respectively, through the 

annual network review process and via the submittal of network modification request 

forms to the EPA Region 8 office. All monitoring site actions were approved by EPA 

Region 8. The current CO monitoring site in Great Falls, Overlook Park (#30-013­

0001), has operated in the city park at the corner of 10th Avenue South and 2nd Street 

since mid-2001. Based on the data from 2008 and 2009, the latest design value is 1.6 

Replaces Page: 7.10.6.2 (1) Dated: December 19, 2000 

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Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

ppm, which is well below the 8-hr NAAQS of 9 ppm and the CO LMP eligibility threshold 

of 7.65 ppm. Figure 7.1 0.6.2.A represents the second highest 8-hr CO concentrations 

from all three of Montana's CO NAAs from 1998 through 2009. 

1998-2009 MT CO NAA Review 2nd Max 8-Hr 

~ssoula #30-063-0005 • Great Falls #30-013-0001 • Billings #30-11~

12,.-----------------------------------, 

11 +------.-------------------------,---­

8-Hr NAAQS/MAAQS 

10 +--------------------T-----------------j 

o 

2 

C 8 +----------;;;;C"-:-:-;:;==-::----------------------­

.S!

:= 7 +--"=-"~'---------r--------------------------1

:!: 

;6+----r'------II-------------------~~~tcC-------I

[l. 

5 +-----HlI--­ -----==--­ ----------­

III 

[l. 4 

3 

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 

Year 

Figure 7.10.6.2.A. Second highest 8-hr CO concentrations in Montana CO NAAs 

from 1998 through 2009. 

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Page 7.10.6.2 (2) 
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Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

7.10.6.3	 Provision 3: Monitoring NetworkNerification of Continued 

Attainment 

CO compliance monitoring in the Great Falls area will continue. In the previous LMP 

this consisted of the Department and the Cascade City/County Health Department 

(CCCHD) operating a gaseous CO monitoring instrument in an ambient air monitoring 

shelter in accordance with the Montana Quality Assurance Project Plan (QAPP), the 

EPA Quality Assurance Manual (EPA-600/9-76-005, revised December 1984), 40 CFR 

Part 50 including Appendix C, and 40 CFR Part 58 inclUding Appendices A through G. 

Precision and accuracy data from the CO monitoring site(s) was submitted to EPA on a 

regular basis through the federal air quality database. 

The Department will continue to monitor CO using an instrumental method or a 

functionally equivalent monitoring methodology as approved by EPA. Emergency 

episode CO monitoring in Great Falls shall be conducted, if necessary, in accordance 

with Montana's Emergency Episode Avoidance Plan. 

Replaces Page: 7.10.6.3 (1) Date: December 19, 2000 

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Page 7.10.6.3 (1) 
Volume II 

Cha ter 7 

STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEIVIENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

7.10.6.4 Provision 4: Contingency Plan 

Section 175(A)(d) of the CAA requires that the maintenance plan contain contingency 

provisions to assure that Montana will promptly correct any violation of the CO NAAQS 

that might occur after the Great Falls CO NAA was designation back to attainment. 

EPA's redesignation guidance notes that Montana is not required to have fully adopted 

contingency measures that would take effect without further action by Montana. 

However, the contingency plan should ensure that contingency measures are adopted 

expeditiously once the need is triggered. The primary elements of the maintenance 

plan involve the tracking and triggering measures to determine when contingency 

measures are needed and a process for implementing appropriate control measures. 

A. CO Concentration Tracking 

As mentioned above in Provision 3, the Department and CCCHD will conduct 

traditional gaseous CO monitoring or surrogate compliance monitoring in the Great 

Falls area. 

B. SIP-Mandated Trigger and Response 

i. Trigger 

The LMP will use one exceedance of the CO NAAQS as the trigger for adopting 

specific contingency measures. The adopted contingency measure(s) will be 

implemented only if a violation of the CO NAAQS occurs. Notification to EPA 

and to the local governments in the Great Falls area of any exceedance will 

occur within 60 days as part of the Quality Assurance/Quality Control (QAlQC) 

monitoring procedure. 

ii. Response 

Upon notification of a CO NAAQS exceedance, the Department and CCCHD will 

recommend appropriate contingency measure(s) intended to avoid a violation of 

the CO NAAQS. Information on the historical exceedances of the standard, the 

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STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

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Carbon Monoxide Limited 

Maintenance Plan 

meteorological conditions related to the recent exceedance(s), and the most 

recent estimates of population and traffic growth and emissions will be reviewed. 

The possibility that an exceptional or natural event occurred will also be 

evaluated. Following the review of this information, the necessary contingency 

measure(s) will be proposed for local adoption. The local adoption process will 

be completed within three months of the exceedance notification. The 

contingency measures provide a maintenance area with the opportunity to 

maintain its status as an attainment area. 

If and when a violation of the NAAQS occurs, the locally adopted contingency 

measure(s) will be fully implemented within one year. Section 175(A)(d) of the 

CAA states: 

The failure of any area redesignated as an attainment area to maintain the 

national air quality standard concerned shall not result in a requirement that 

the State revise its State implementation plan unless the Administrator, in the 

Administrator's discretion, requires the State to submit a revised State 

implementation plan. 

C.	 Possible Contingency Measures 

The CCCHD may choose one or more contingency measures to recommend to local 

officials and the Department for consideration. The CCCHD will select contingency 

measures designed to bring the area back into compliance with the CO NAAQS 

quickly and to specifically meet the needs of the Great Falls area. Some potential 

contingency measures include: 

•	 Implementation a local oxygenated fuel program in the Great Falls or Cascade 

County area for the winter months of November, December, and January 

(typically the months with the highest ambient CO levels); 

•	 Implementation of an episodic woodburning curtailment program; and/or 

•	 Other emission control measures appropriate for the area that are yet to be 

defined. 

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STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

D. Maintenance Plan Requirements 

After submittal and approval of this second 10-yr LMP, there are no further 

requirements for any additional revisions or modifications to the LMP. 

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STATE OF MONTANA 

AIR QUALITY CONTROL 

IMPLEMENTATION PLAN 

Subject: Cascade County 

Carbon Monoxide Limited 

Maintenance Plan 

7.10.6.5	 Provision 5: Conformity Determinations Under Limited 

Maintenance Plans 

The conformity provisions of the second 1O-year plan will continue from the initial plan. 

Since the Great Falls area was a 'Not Classified' nonattainment CO area, only some of 

the general provisions of the CAA Part D apply. These include the "General" and 

"Transportation" conformity provisions of CAA Section 176(c). The conformity 

provisions ensure that federally funded or approved projects and actions conform to the 

air quality planning goals of the Great Falls CO control plan before they are 

constructed. For the purpose of the LMP for Great Falls, the conformity issues are 

slightly different than in a full maintenance plan and are explained below. 

The transportation conformity rule of November 24, 1993 (58 FR 62188) and the 

general conformity rule of November 30,1993 (58 FR 63214) apply to nonattainment 

areas and maintenance areas operating under maintenance plans. Under either rule, 

conformity can be demonstrated by indicating that the expected emissions from 

planned actions are consistent with the emissions budget for the area. In areas with 

LMPs, conformity determinations are still required, but a LMP has no emission budget 

because "emissions budgets in limited maintenance plan areas may be treated as 

essentially not constraining for the length of the initial maintenance period" ("Limited 

Maintenance Plan Option for Nonclassifiable CO Nonattainment Areas," memorandum 

from Joseph Paisie to the EPA Regional Air Branch Chiefs, October 6, 1995). 

For general conformity, all projects are considered to satisfy the "budget test" specified 

in 40 CFR 93.158(a)(5)(i)(A) once EPA has approved this redesignation request. For 

transportation conformity, federal actions requiring conformity determinations are 

considered to satisfy the budget test specified in sections 93.118, 93.119 and 93.120 of 

the conformity rule once this LMP is found adequate by EPA. In Great Falls, federal 

actions are also considered to satisfy the transportation conformity rule's requirements 

for expeditious implementation of transportation control measures (TCMs), because 

there are no TCMs in the Great Falls SIP. Transportation plans, transportation 

improvement programs and Federal projects still require conformity determinations in 

order to proceed, and Federal projects are still subject to the hotspot modeling 

requirements of the transportation conformity rule. 

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STATE OF MONTANA Subject: Cascade County 

AIR QUALITY CONTROL Carbon Monoxide Limited 

IMPLEMENTATION PLAN Maintenance Plan 

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