Department of Natural Resources and Environmental Control Air Quality Management Section respon ses to United States Environmental Protection Agency comments rec eived on August 03, 2009 on Delaware’s Ozone, Fine Particulate Matter (PM 2.5 ) NAAQS and Visibility and 2006

24-Hour PM 2.5 NAAQS State Implementation Plans (SIP)

Comments on the Proposed DE Infrastructure SIP Submittals



### A. Addendum to Ozone, Fi ne Particulate Matter (PM 2.5 

### ) NAAQS and Visibility SIP

Comment 1: Title page: Change “ Revision to ...” to “ Addendum to the ...”

Response : Delaware agrees with this comment, and revised accordingly.

Comment 2: Table (pages 4 -5): The following Re gulations were not found in the EPA approved SIPs for Delaware and also not found in 40 CFR 52.420(c): Regulations, 18, 22, 29, 34, 43, 45.

Response : Delaware agrees with this comment, and References to Delaware Regulations, 18, 22, 29, 34, 43, and 45 were deleted.

Comment 3: Table on page 8 – Certification se ction: §110(a)(2)(G) – Delete second paragraph (underlined). This is mentione d in the SIP revision section – page 17.

Response : Delaware agrees with this comment, and this Paragraph was deleted.

Comment 4: Page 14 – under §110(a)(2)(D): Delete the first bullet (authority to regulate sources).

Response : Delaware agrees with this comment, and this bullet was deleted.

Comment 5: Check numbering of footnotes.

Response : Footnotes were corrected.



### B. 2006 24-Hour PM 2.5 

### NAAQS SIP

Comment 1: Title page: Change “...Requirements in ...” to “...Requirements of ...”

and add PM 2.5 to “Implementation, Maintenance, and Enforcement of the 2006 24-Hr

PM 2.5 NAAQS.”

Response : Title was changed as requested.Comment 2: Page 3, 3 rd paragraph, second sentence... Change “in September” to “on October 17, 2006...”

Response : Dates changed as requested.

Comment 3: Table, page 4, insert Regulation before 46.

Response : “Regulation” inserted as requested.

Comment 4: Table (pages 4 -5): The following Re gulations were not found in the EPA approved SIPs for Delaware and also not found in 40 CFR 52.420(c): Regulations, 18, 22, 29, 43, 45.

Response : Delaware agrees with this comment, and References to Delaware Regulations, 18, 22, 29, 43, and 45 were deleted.

Comment 5: Table on page 7 – Certification se ction: §110(a)(2)(G) – Delete second paragraph. This is mentioned in the SIP revision section – page 14.

Response : Delaware agrees with this comment, and the second paragraph on page 7

in the table was deleted.

Comment 6: Page 11, under §110(a)(2)(D): Delete th e first bullet (authority to regulate sources).

Response : Page 11, first bullet was deleted as requested.

Comment 7: Page 11, under §110(a)(2)(D)(i)(I): Wh at does this number refer to - [3] ? There is a number 3 footnote on page 10.

Response : This was a typo and was corrected.

Comment 8: Page 12: Regulation 1142, Section 2, Control of NOx Emissions from Industrial Boilers and Process Heaters at Petroleum Refineries, has not been submitted to

EPA as a SIP revision.

Response : Delaware agrees with this comment, and the reference to Regulation 1142, Section 2, Control of NOx Emissions from Industrial Boilers and Process Heaters at

Petroleum Refineries was deleted.

Comment 9: Page 14: §110(a)(2)(G) – Delete: “For the 1997 and 2006 PM 2.5 NAAQS, the emergency episode plan will be updated after EPA develops ne w thresholds per 40 CFR 52.420(c), as necessary.” This sentence will make this element incomplete. Copy the sentence on page 17 – revised December 2007 submittal.

Response : Delaware agrees with this comm ent, and revised as requested.Comment 10: Page 15: §110(a)(2)(H) – Delete: “For the 2006 24-hr fine particulate matter.5 NAAQS, the attainment demonstrati on is not yet due under the CAA, and will be developed as a SIP revision, as required.” This sentence will make this element incomplete.

Response : Delaware agrees with this comment, and this sentence was deleted.

Comment 11: Page 15: §110(a)(2)(I) – De lete: “For the 2006 24-hr PM 2.5 NAAQS, any remaining applicable requirements which are not yet due under the CAA, will be developed as SIP revisions, as required.” This sentence will make this element incomplete.

Response : Delaware agrees with this comment, and this sentence was deleted

Comment 12: Page 16: §110(a)(2)(I) – De lete: “For the 2006 24-hr PM 2.5 NAAQS, any remaining applicable requirements which are not yet due under the CAA, will be developed as SIP revisions, as required.” This sentence will make this element incomplete.

Response : Delaware agrees with this comment, and this sentence was deleted

Comment 13: Page 17: §110(a)(2)(K) – De lete: “For the 2006 24-hr PM 2.5 NAAQS, any remaining applicable requirements whic h are not yet due under the CAA, will be developed as SIP revisions, as required.” This sentence will make this element incomplete.

Response : Delaware agrees with this comment, and this sentence was deleted