Mayl8,2010 F’’

Shawn Garvin (3RAOO)

Regional Administrator RECE U. S. Environmental Protection Agency DRegion III JUN 3 2010 1650 Arch StreetPhiladelphia, PA 19103-2029 Division Director (3APOO)

Dear Mr. Garvin:

Pursuant to section 181 (a)(5) of the Clean Air Act this is a request for a 1 -year attainment

date extension, to June 15, 2011, for the State of Delaware and the Philadelphia-WilmingtonAtlantic City, PA-DE-MD-NJ non-attainment area (NAA). This NAA is classified as moderate

non-attainment for the 1997 8-hour ozone national ambient air quality standard. By this letter, I

am certifying that:

1) The State of Delaware has complied with all requirements and commitments pertaining to

the area in the applicable ozone implementation plan; and

2) The Philadelphia-Wilmington-Atlantic City, PA-DE-MD-NJ non-attainment area’s 4thi

highest daily 8-hour monitored value during the 2009 ozone season is 0.084 ppm or less.Attached is the letter certifying that Delaware’s ozone air quality data in the Air Quality

System is complete, quality-assured ambient air quality monitoring data for the 2009

attainment year ozone season.

I would appreciate if you would initiate action on this request as soon as possible. As

always, feel free to contact me or Ali Mirzakhalili, Program Administrator, (302) 739-9402, if

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Sincerely,

Collin P. O’Mara

Secretary

cc: Au Mirzakhalili

Dave Arnold

Attachment
March 22, 2010

Mr. Shawn M. Garvin (3RAOO)

Regional Administrator

U. S. Environmental Protection Agency

Region III

1650 Arch Street

Philadelphia, PA 19103

Dear Mr. Garvi n:

In accordance with recent revisions to 40 Code of Federal Regulations (CFR) Chapter 1 Part 58

and associated guidance from EPA, we arc submitting this data certification notice for the

Delaware 2009 air pollutant raw data,

I hereby certify that, to the best of my knowledge, the Delaware 2009 ambient pollutant

concentration data and the associated quality assurance data are completely submitted to the Air

Quality System (AQS), and the ambient data are accurate taking into consideration the quality

assurance findings. The data subject to this certification are identified as all combinations of

site, monitor, pollutant, and POC included in the AQS reports AMP45O, AMP45ONC, and A.MP

255, which are being submitted electronically as part ofthis certification package to your office

and to the people hsted as copied below. The only ecept1on to the quail ty assurance data

completeness is for the P1v12.5 spcciation sampler flow checks, which have not been subnijtted to

AQS due to the lack of an established procedure fbr the submittal.

I also certify that the data collection procedures conformed to the applicable quality assurance,

air monitoring methodology, probe siting criteria and reporting requirements in Part 58 ofthe

CFR, Appendices A, C, £ and F. The o:nly exceptions are:

• PM 10, which does not meet the coLlocation requirement since Delaware only has a single

ni on ilor; an.d

• 1_cad, which was monitored as part of an air toxics metals project in 2009, and the data is

not yet available.

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If you have any questions or need additional information please feel free to call me at 302-739-

9402.

Sincerely,

/ / ,

AlIMirzakhalili, P,E.

Administrator

cc: Walter Wilkie, U.S. EPA Region 3, Air Quality Analysis Branch Chief

Pauline Devose, U.S. EPA Region 3, Air Quality Analysis BranchJoe Martini, An Surveillance Branch Managci, w/o attachments

Betsy Frey, Air Quality Management QA Coordinator, wlo attachments

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