ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R03-OAR-2010-0158]; FRL- ] 

Approval and Promulgation of Air Quality Implementation Plans; Delaware; Section 

110(a)(2) Infrastructure Requirements for the 1997 8-Hour Ozone and the 1997 and 2006 

Fine Particulate Matter National Ambient Air Quality Standards

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

SUMMARY: EPA is proposing to approve submittals from the State of Delaware pursuant to 

the Clean Air Act (CAA) sections 110(k)(2) and (3). These submittals address the infrastructure 

elements specified in the CAA section 110(a)(2) necessary to implement, maintain, and enforce 

the 1997 8-hour ozone and fine particulate matter (PM2.5) national ambient air quality standards 

(NAAQS), and the 2006 PM2.5 NAAQS. This proposed action is limited to the following 

infrastructure elements which were subject to EPA’s completeness findings pursuant to CAA 

section 110(K)(1) for the 1997 8-hour ozone NAAQS, dated March 27, 2008, and the 1997 PM2.5 

NAAQS, dated October 22, 2008: 110(a)(2)(A), (B), (C), (D)(ii), (E), (F), (G), (H), (J), (K), (L), 

and (M), or portions thereof.

DATES: Written comments must be received on or before [insert date 30 days from date of 

publication]. 

ADDRESSES: Submit your comments, identified by Docket ID Number EPA-R03-OAR2010-0158 by one of the following methods:
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A. www.regulations.gov. Follow the on-line instructions for submitting comments.

B. E-mail: fernandez.cristina@epa.gov.

C. Mail: EPA-R03-OAR-2010-0158, Cristina Fernandez, Associate Director, Office of Air 

Program Planning, Mailcode 3AP30, U.S. Environmental Protection Agency, Region III, 1650 

Arch Street, Philadelphia, Pennsylvania 19103.

D. Hand Delivery: At the previously-listed EPA Region III 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.

Instructions: Direct your comments to Docket ID No. EPA-R03-OAR-2010-0158. EPA's 

policy is that all comments received will be included in the public docket without change, and 

may be made available online at www.regulations.gov, including any personal information 

provided, unless the comment includes information claimed to be Confidential Business 

Information (CBI) or other information whose disclosure is restricted by statute. Do not submit 

information that you consider to be CBI or otherwise protected through www.regulations.gov or 

e-mail. The www.regulations.gov website is an Aanonymous access@ system, which means EPA 

will not know your identity or contact information unless you provide it in the body of your 

comment. If you send an e-mail comment directly to EPA without going through 

www.regulations.gov, your e-mail address will be automatically captured and included as part of 

the comment that is placed in the public docket and made available on the Internet. If you submit 

an electronic comment, EPA recommends that you include your name and other contact 

information in the body of your comment and with any disk or CD-ROM you submit. If EPA 
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cannot read your comment due to technical difficulties and cannot contact you for clarification, 

EPA may not be able to consider your comment. Electronic files should avoid the use of special 

characters, any form of encryption, and be free of any defects or viruses.

Docket: All documents in the electronic docket are listed in the www.regulations.gov index. 

Although listed in the index, some information is not publicly available, i.e., CBI or other 

information whose disclosure is restricted by statute. Certain other material, such as copyrighted 

material, is not placed on the Internet and will be publicly available only in hard copy form. 

Publicly available docket materials are available either electronically in www.regulations.gov or 

in hard copy during normal business hours at the Air Protection Division, U.S. Environmental 

Protection Agency, Region III, 1650 Arch Street, Philadelphia, Pennsylvania 19103. Copies of 

the State submittal are available at the Delaware Department of Natural Resources & 

Environmental Control, 89 Kings Highway, P.O. Box 1401, Dover, Delaware 19903.

FOR FURTHER INFORMATION CONTACT: Ellen Wentworth, (215) 814-2034, or by email at wentworth.ellen@epa.gov.

SUPPLEMENTARY INFORMATION:

I. Background 

On July 18, 1997, EPA promulgated a revised 8-hour ozone NAAQS (62 FR 38856) and a new 

PM2.5 NAAQS (62 FR 38652). The revised ozone NAAQS is based on 8-hour average 

concentrations. The 8-hour averaging period replaced the previous 1-hour averaging period, and 
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the level of the NAAQS was changed from 0.12 parts per million (ppm) to 0.08 ppm. The new 

PM2.5 NAAQS established a health-based PM2.5 standard of 15.0 micrograms per cubic meter 

(μg/m3) based on a 3-year average of annual mean PM2.5 concentrations, and a 24-hour standard 

of 65μg/m3 based on a 3-year average of the 98th percentile of 24-hour concentrations. EPA 

strengthened the 24-hour PM2.5 NAAQS from 65μg/m3 to 35μg/m3 on October 17, 2006

(71 FR 61144).

Section 110(a) of the CAA requires States to submit State Implementation Plans (SIPs) that 

provide for the implementation, maintenance, and enforcement of new or revised NAAQS within 

three years following the promulgation of such NAAQS. In March of 2004, Earthjustice initiated 

a lawsuit against EPA for failure to take action against States that had not made SIP submissions 

to meet the requirements of sections 110(a)(1) and (2) for the 1997 8-hour ozone and PM2.5 

NAAQS, i.e., failure to make a “finding of failure to submit the required SIP 110(a) SIP 

elements.” On March 10, 2005, EPA entered into a Consent Decree with Earthjustice that 

obligated EPA to make official findings in accordance with section 110(k)(1) of the CAA as to 

whether States have made required complete SIP submissions, pursuant to sections 110(a)(1) and 

(2), by December 15, 2007 for the 1997 8-hour ozone NAAQS, and by October 5, 2008 for the 

1997 PM2.5 NAAQS. EPA made such findings for the 1997 8-hour ozone NAAQS on March 27, 

2008 (73 FR 16205) and on October 22, 2008, (73 FR 62902) for the 1997 PM2.5 NAAQS. These 

completeness findings did not include findings relating to: 1) section 110(a)(2)(C) to the extent 

that such subsection refers to a permit program as required by part D Title I of the CAA; 2)

section 110(a)(2)(I); and 3) section 110(a)(2)(D)(i), which has been addressed by a separate 
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finding issued by EPA on April 25, 2005 (70 FR 21147). Therefore this action does not cover 

these specific elements.

II. Summary of State Submittals

Delaware provided multiple submittals to satisfy section 110(a)(2) requirements that are the 

subject of this proposed action for the 1997 8-hour ozone NAAQS, and the 1997 and 2006 PM2.5 

NAAQS. The submittals shown in Table 1 addressed the infrastructure elements, or portions 

thereof, identified in section 110(a)(2) that EPA is proposing to approve.

Table 1. 110(a)(2) Elements or Portions Thereof, EPA is Proposing to Approve for the 

1997 Ozone and PM2.5 and the 2006 PM2.5 NAAQS

Submittal Date 1997 8-Hour Ozone 1997 PM2.5 2006 PM2.5

December 13, 2007 A, B, C, D(ii), E, F, 

G, H, J, K, L, M

A, B, C, D(ii), E, F, 

G, H, J, K, L, M

March 12, 2008 C and J

September 19, 2008 G

September 16, 2009 A, B, C, D(ii), E, F, 

G, H, J, K, L, M

A, B, C, D(ii), E, F, 

G, H, J, K, L. M

A, B, C, D(ii), E, F, 

G, H, J, K, L, M

March 10, 2010 G G

EPA has analyzed the above identified submissions and is proposing to make a determination 

that such submittals meet the requirements of section 110(a)(2)(A), (B), (C), (D)(ii), (E), (F), (G), 

(H), (J), (K), (L), and (M), or portions thereof. A detailed summary of EPA’s review and 

rationale for approving Delaware’s submittals may be found in the Technical Support Document 

(TSD) for this action, which is available on line at www.regulations.gov, Docket number EPAR03-OAR-2010-0158.
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III. Proposed Action

EPA is proposing to approve Delaware’s submittals that provide the basic program elements 

specified in the CAA sections 110(a)(2)(A), (B), (C), (D)(ii), (E), (F), (G), (H), (J), (K), (L), and 

(M), or portions thereof, necessary to implement, maintain, and enforce the 1997 8-hour ozone 

and PM2.5 NAAQS, and the 2006 PM2.5 NAAQS. EPA is soliciting public comments on the 

issues discussed in this document. These comments will be considered before taking final action.

IV. Statutory and Executive Order Reviews 

Under the Clean Air Act, the Administrator is required to approve a SIP submission that 

complies with the provisions of the Act and applicable Federal regulations. 42 U.S.C. 7410(k); 

40 CFR 52.02(a). Thus, in reviewing SIP submissions, EPA’s role is to approve state choices, 

provided that they meet the criteria of the Clean Air Act. Accordingly, this action merely

proposes to approve state law as meeting Federal requirements and does not impose additional 

requirements beyond those imposed by state law. For that reason, this proposed action:

 is not a "significant regulatory action” subject to review by the Office of Management and 

Budget under Executive Order 12866 (58 FR 51735, October 4, 1993); 

 does not impose an information collection burden under the provisions of the Paperwork 

Reduction Act (44 U.S.C. 3501 et seq.);

 is certified as not having a significant economic impact on a substantial number of small 

entities under the Regulatory Flexibility Act (5 U.S.C. 601 et seq.); 
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 does not contain any unfunded mandate or significantly or uniquely affect small 

governments, as described in the Unfunded Mandates Reform Act of 1995 (Public Law 

104-4);

 does not have Federalism implications as specified in Executive Order 13132 (64 FR 

43255, August 10, 1999);

 is not an economically significant regulatory action based on health or safety risks subject 

to Executive Order 13045 (62 FR 19885, April 23, 1997); 

 is not a significant regulatory action subject to Executive Order 13211 (66 FR 28355, 

May 22, 2001); 

 is not subject to requirements of Section 12(d) of the National Technology Transfer and 

Advancement Act of 1995 (15 U.S.C. 272 note) because application of those 

requirements would be inconsistent with the Clean Air Act; and 

 does not provide EPA with the discretionary authority to address, as appropriate, 

disproportionate human health or environmental effects, using practicable and legally

permissible methods, under Executive Order 12898 (59 FR 7629, February 16, 1994).
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In addition, this proposed rule, pertaining to Delaware’s section 110(a)(2) infrastructure 

requirements for the 1997 8-hour ozone and PM2.5 NAAQS, and the 2006 PM2.5 NAAQS does 

not have tribal implications as specified by Executive Order 13175 (65 FR 67249, November 9, 

2000), because the SIP is not approved to apply in Indian country located in the state, and EPA 

notes that it will not impose substantial direct costs on tribal governments or preempt tribal law.

List of Subjects in 40 CFR Part 52

Environmental protection, Air pollution control, Nitrogen dioxide, Ozone, Particulate matter, 

Reporting and recordkeeping requirements, Volatile organic compounds. 

Authority: 42 U.S.C. 7401 et seq.

_May 21, 2010_______________ ___________/s/_________________

Dated: William C. Early, Acting

 Regional Administrator,

 Region III.