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DAVE FREUDENTHAL STATE CAPITOL 

GOVERNOR THE STATE OF WYOMING CHEYENNE, WY 82002 

Oflice of the Governor "10; {) PK.1' 

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RECEIVED 

U.S. EPA Region 8 

Ms. Carol Rushin RA'sOffioe
 

Acting Regional Administrator
 

USEPA OCT 132009 Region 8
 

Mail Code: 8P-AR
 

1595 Wynkoop Street
 

Denver, CO 80202-8917
 

RE: Wyoming Area Designations for the Revised 2008 Lead NAAQS 

Dear Ms. Rushin: 

In response to 107(d)(1 ) of the Clean Air Act, the State of Wyoming is making 

recommendations on attainment or nonattainment classifications for the State of 

Wyoming for the 2008 revised National Ambient Air Quality Standard for lead, which 

became effective on January 12,2009. 

The State used guidance issued by EPA on August 21, 2009 in a memorandum 

from William T. Harnett entitled "Area Designations for the 2008 Revised Lead National 

Ambient Air Quality Standards" to determine the appropriate State designation. The 

State does not have data collected which meet 40 CFR part 50 Appendix R specifications 

for use in this designation. The Air Quality Division (AQD) has collected single years of 

Pb-TSP data according to EPA-approved methods which are shown in Appendix 1 for 

reference. Quarterly means shown in Appendix 1 are all below the level of the 2008 

revised standard established at 0.15 IJg/m3 (arithmetic mean concentration over a 3­

month period). Additionally, AQD has investigated reported lead emissions in the 2002 

and 2005 National Emissions Inventory (NEI) and have not found any significant sources 

oflead. Based on this guidance and data review, the State would like to designate the 

entire State of Wyoming as attainment/unclassifiable for the revised 2008 lead standard. 

There are portions of some counties in the State of Wyoming which are under the 

jurisdiction of Tribal Authorities. It is our understanding that Tribal designations will be 

made separately from State designations. 

TTY: 777-7860 PHONE: (307) 777-7434 FAX: (307) 632-3909 

Ms. Carol Rushin 

Wyoming Area Designations for Revised 2008 Lead NAAQS 

October 8, 2009 

Page 2 of3 

We look forward to your timely review and approval of this request. If you have 

any questions concerning the details of this recommendation, please feel free to contact 

Air Quality Division Administrator, Dave Finley, at 307-777-7391. 

Best regards, 

c:	 John V. Corra, DEQ Director 

Dave Finley, AQD Administrator 

Cara Keslar, AQD 

Christine Anderson, AQD 

· .

Ms. Carol Rushin 

Wyoming Area Designations for Revised 2008 Lead NAAQS 

October 8, 2009 

Page 3 of3 

Appendix 1 

1989 Pb-TSP Data: Quarterly Mean J.lg/m3 

City 1Q1989 2Q1989 3Q1989 4Q1989 

Casper 0.0107 0.0141 BD* BD* 

Cheyenne 0.0032 0.0047 0.0058 0.0037 

___-B-ock Springs __ -_.­ - 0.0158 0.0111 0.0124 -_.. _--_._-------_.._------------ .-­ ------­----_._---­ ----­ 0.0108 --­ ..-- - "._-­ ---­ ._--­

* BD= below detection limits 

2003-2004 Newcastle, WY Pb-TSP Data: Quarterly Mean J.lg/m3 

Site 3Q2003 4Q2003 1Q2004 2Q2004 

2382 0.001 0.002 0.001 0.002 

2384 0.001 0.001 0.002 0.002 

2389 0.001 0.001 0.001 0.001 

2531 0.002 0.001 0.001 0.003 
I