63140 Federal Register / Vol. 75, No. 198 / Thursday, October 14, 2010 / Proposed Rules 

FOR FURTHER INFORMATION CONTACT: 

Gregory Nudd, U.S. EPA Region 9, 415– 

947–4107, nudd.gregory@epa.gov or 

http://www.epa.gov/region09/air/ 

actions. 

SUPPLEMENTARY INFORMATION: On 

September 9, 2010 (75 FR 54806), EPA 

published a proposed rule proposing to 

approve in part and disapprove in part 

State implementation plan (SIP) 

revisions submitted by the State of 

Arizona to meet the Clean Air Act 

(CAA) requirements applicable to the 

serious Maricopa County (Phoenix) 

nonattainment area (Maricopa area). 

These requirements apply to the 

Maricopa area following EPA’s June 6, 

2007 finding that the area failed to meet 

its December 31, 2006 serious area 

deadline to attain the national ambient 

air quality standards (NAAQS) for 

particulate matter of ten microns or less 

(PM–10). Under CAA section 189(d), 

Arizona was required to submit a plan 

by December 31, 2007 providing for 

expeditious attainment of the PM–10 

NAAQS and for an annual emission 

reduction in PM–10 or PM–10 

precursors of not less than five percent 

per year until attainment (189(d) plan). 

In the Agency’s September 9, 2010 

proposed rule, EPA proposed to 

disapprove provisions of the 189(d) plan 

for the Maricopa area because they do 

not meet applicable CAA requirements 

for emissions inventories as well as for 

attainment, five percent annual 

emission reductions, reasonable further 

progress and milestones, and 

contingency measures, and to 

disapprove the 2010 motor vehicle 

emission budget in the 189(d) plan as 

not meeting the requirements of CAA 

section 176(c) and 40 CFR 93.118(e)(4). 

EPA also proposed a limited approval 

and limited disapproval of State 

regulations for the control of PM–10 

from agricultural sources. Finally, EPA 

proposed to approve various provisions 

of State statutes relating to the control 

of PM–10 emissions in the Maricopa 

area. 

The September 9, 2010 proposed rule 

provided a 30-day public comment 

period ending on October 12, 2010. In 

response to a request for an extension of 

the comment period from Benjamin H. 

Grumbles, Director, Arizona Department 

of Environmental Quality, and Dennis 

Smith, Executive Director, Maricopa 

Association of Governments, submitted 

by letter dated October 4, 2010, EPA is 

extending the comment period to 

October 20, 2010. 

Dated: October 7, 2010. 

Jared Blumenfeld, 

Regional Administrator, EPA Region IX. 

[FR Doc. 2010–26019 Filed 10–13–10; 8:45 am] 

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ENVIRONMENTAL PROTECTION 

AGENCY 

40 CFR Part 300 

[EPA–HQ–SFUND–1983–0002; FRL–9213–9] 

National Oil and Hazardous 

Substances Pollution Contingency 

Plan; National Priorities List: Partial 

Deletion of the Denver Radium 

Superfund Site 

AGENCY: Environmental Protection 

Agency. 

ACTION: Proposed rule, extension of 

public comment period. 

SUMMARY: The Environmental Protection 

Agency (EPA) Region 8 issued a Notice 

of Intent to Delete portions of the 

Denver Radium Superfund Site from the 

National Priorities List (NPL) on 

September 9, 2010 (75 FR 54779). The 

portions proposed for deletion are each 

of the 11 operable units at the Denver 

Radium Site, located in the City and 

County of Denver, Colorado. 

Groundwater contamination associated 

with Operable Unit 8 will remain on the 

NPL. To ensure that everyone has an 

opportunity to comment, EPA is 

extending the public comment period 

through November 1, 2010. 

The NPL, promulgated pursuant to 

section 105 of the Comprehensive 

Environmental Response, 

Compensation, and Liability Act 

(CERCLA) of 1980, as amended, is an 

appendix of the National Oil and 

Hazardous Substances Pollution 

Contingency Plan (NCP). The EPA and 

the State of Colorado, through the 

Colorado Department of Public Health 

and Environment (CDPHE), have 

determined that all appropriate 

response actions under CERCLA, other 

than operation, maintenance and fiveyear reviews have been completed. 

This rationale for deleting the 11 

operable units of the Denver Radium 

Superfund Site has not changed. The 

Federal Register notice for the proposed 

deletion (75 FR 54779) discusses this 

rationale in detail. 

DATES: Comments concerning the 

proposed partial deletion may be 

submitted to EPA on or before 

November 5, 2010. 

ADDRESSES: Submit your comments, 

identified by Docket ID No. EPA–HQ– 

SFUND–1983–0002, by one of the 

following methods: 

• http://www.regulations.gov: Follow 

the on-line instructions for submitting 

comments. 

• E-mail: dalton.john@epa.gov. 

• Fax: 303–312–7110. 

• Mail: Mr. John Dalton, Community 

Involvement Coordinator (8OC), U.S. 

EPA, Region 8, 1595 Wynkoop Street, 

Denver, Colorado 80202–1129. 

• Hand Delivery: 1595 Wynkoop 

Street, Denver, Colorado 80202–1129. 

Such deliveries are only accepted 

during the Docket’s normal hours of 

operation, and special arrangements 

should be made for deliveries of boxed 

information. 

Docket: All documents in the docket 

are listed in the http:// 

www.regulations.gov index. Although 

listed in the index, some information is 

not publicly available, e.g., CBI or other 

information whose disclosure is 

restricted by statute. Certain other 

material, such as copyrighted material, 

will be publicly available only in hard 

copy. Publicly available docket 

materials are available either 

electronically in http:// 

www.regulations.gov or in hard copy at: 

—EPA’s Region 8 Superfund Records 

Center, 1595 Wynkoop Street, Denver, 

Colorado 80202–2466. Hours: 8 a.m. 

to 4 p.m. by appointment (call 303– 

312–6473), Monday through Friday, 

excluding legal holidays; and the 

—Colorado Department of Public Health 

and Environment, 4300 Cherry Creek 

Drive South, Denver, CO 80246 

Hours: M–F, 8 a.m. to 5 p.m. 

FOR FURTHER INFORMATION CONTACT: Mr. 

John Dalton, Community Involvement 

Coordinator (8OC), U.S. Environmental 

Protection Agency, Region 8, 1595 

Wynkoop Street, Denver, Colorado 

80202–1129; telephone number: 1–800– 

227–8917 or 303–312–6633; fax 

number: 303–312–7110; e-mail address: 

dalton.john.@epa.gov. 

Dated: October 7, 2010. 

James B. Martin, 

Regional Administrator, Region 8. 

[FR Doc. 2010–25902 Filed 10–13–10; 8:45 am] 

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