ENVIRONMENTAL PROTECTION AGENCY 

40 CFR Part 52 

[EPA-R09-OAR-2011-0169; FRL– ] 

Approval and Promulgation of Implementation Plans; Nevada; 

Determination of Attainment for the Clark County 8-Hour Ozone 

Nonattainment Area 

AGENCY: Environmental Protection Agency (EPA). 

ACTION: Proposed rule. 

SUMMARY: EPA proposes to determine that the Clark County 

(Nevada) 8-hour ozone nonattainment area has attained the 1997 

8-hour ozone national ambient air quality standards (NAAQS). 

This proposed determination is based upon complete, qualityassured, and certified ambient air monitoring data that show the 

area has monitored attainment of the 1997 8-hour ozone NAAQS for 

the 2007 to 2009 monitoring period. Preliminary air quality 

monitoring data available for 2010 are consistent with continued 

attainment. Based on this proposed determination, the 

requirement for the State of Nevada to submit an attainment 

demonstration and associated reasonably available control 

measures (RACM), a reasonable further progress (RFP) plan, 

contingency measures, and other planning requirements related to 

attainment of the 1997 8-hour ozone NAAQS for the Clark County 

ozone nonattainment area would be suspended for as long as the 
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nonattainment area continues to meet the 1997 8-hour ozone 

NAAQS. This action is being taken under the Clean Air Act (CAA). 

DATES: Written comments must be received on or before [FEDERAL 

REGISTER OFFICE: Insert date 30 days after date of publication 

in the Federal Register]. 

ADDRESSES: Submit comments, identified by docket number EPAR09-OAR-2011-0169, by one of the following methods: 

1. www.regulations.gov: Follow the on-line instructions for 

submitting comments. 

2. E-mail: kelly.johnj@epa.gov. 

3. Fax: (415) 947-3579. 

4. Mail: “EPA-R09-OAR-2011-0169,” Lisa Hanf, Chief, Air 

Planning Office, Air Division, U.S. Environmental 

Protection Agency, Region IX, 75 Hawthorne Street (Air-2), 

San Francisco, California 94105. 

5. Hand Delivery or Courier: At the previously-listed EPA 

Region IX address. Such deliveries are only accepted during 

the Docket's normal hours of operation, and special 

arrangements should be made for deliveries of boxed 

information. 
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Please see the direct final rule which is located in the Rules 

section of this Federal Register for detailed instructions on 

how to submit comments. 

FOR FURTHER INFORMATION CONTACT: John Kelly, (415) 947-4151, or 

by email at kelly.johnj@epa.gov. 

SUPPLEMENTARY INFORMATION: For further information, please see 

the direct final action, of the same title, which is located in 

the Rules section of this Federal Register. EPA is approving the 

attainment determination and related suspension of attainment 

planning-related SIP submittal requirements as a direct final 

rule without prior proposal because EPA views this as a 

noncontroversial action and anticipates no adverse comments. A 

detailed rationale for the determination and suspension of 

attainment-related SIP submittal requirements is set forth in 

the preamble to the direct final rule. If EPA receives no 

adverse comments, EPA will not take further action on this 

proposed rule. 

If EPA receives adverse comments, EPA will withdraw the 

direct final rule and it will not take effect. EPA will address 

all public comments in a subsequent final rule based on this 
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proposed rule. EPA will not institute a second comment period on 

this action. Any parties interested in commenting on this action 

should do so at this time. Please note that if we receive 

adverse comment on an amendment, paragraph, or section of this 

rule and if that provision may be severed from the remainder of 

the rule, EPA may adopt as final those provisions of the rule 

that are not the subject of an adverse comment. 

___3/15/2011________ _____/s/_______________ 

Dated: Jared Blumenfeld 

Regional Administrator, 

EPA Region IX.