### 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]

**BILLING CODE 6560–50–P**

**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, otherthan 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]

**BILLING CODE 6560–50–P**