ENVIRONMENTAL PROTECTION AGENCY 

40 CFR Part 55 

[EPA-ROI-OAR-2010-0442 ; A-1-FRL- ] 

Outer Continental Shelf Air Regulations Consistency Update for Massachusetts 

AGENCY: Environmental Protection Agency (EPA). 

ACTION: Proposed rule-consistency update 

SUMMARY: EPA is proposing to update to a portion of the Outer Continental Shelf ("OCS") 

Air Regulations. Requirements applying to OCS sources located within 25 miles of States' 

seaward boundaries must be updated periodically to remain consistent with the requirements of 

the corresponding onshore area ("COA"), as mandated by section 328(a)(1) of the Clean Air Act 

("the Act"). The portion of the OCS air regulations that is being updated pertains to the 

requirements for OCS sources in the Commonwealth of Massachusetts. The intended effect of 

approving the OCS requirements for the Commonwealth of Massachusetts is to regulate 

emissions from OCS sources in accordance with the requirements onshore. The change to the 

existing requirements discussed below is incorporated by reference into the Code of Federal 

Regulations and is listed in the appendix to the OCS air regulations . 

DATES: Written comments must be received on or before [Insert date 30 days after 

publication in the Federal Re ister . 

ADDRESSES: Submit your comments, identified by Docket ID Number EPA-ROI-OAR-2410-

0442 by one of the following methods : 

1 . www.regulations.gov : Follow the on-line instructions for submitting comments. 

2. E-mail: mcdonnell.ida(ii),epa .gov 
3 . Fax : (617) 918-0653 . 

4. Mail: "Docket Identification Number EPA-ROI-OAR-2010-0442", Ida McDonnell, 

U.S . Environmental Protection Agency, EPA New England Regional Office, 5 Post 

Office Square - Suite 100, (Mail Code OEP05-2), Boston, MA 02109-3912. 

5 . Hand Delivery or Courier. Deliver your comments to : Ida McDonnell, Air Permits, 

Toxics and Indoor Air Unit, Office of Ecosystem Protection, U.S . Environmental 

Protection Agency, EPA New England Regional Office, 5 Post Office Square - Suite 100, 

(Mail Code OEP05-2), Boston, MA 02109-3912. Such deliveries are only accepted 

during the Regional Office's normal hours of operation. The Regional Office's official 

hours of business are Monday through Friday, 8 :30 to 4 :30, excluding legal holidays . 

Please see the direct final rule which is located in the Rules Section of this Federal 

Register for detailed instructions on how to submit comments. 

FOR FURTHER INFORMATION CONTACT: Ida E. McDonnell, Air Permits, Toxics and 

Indoor Air Unit, U.S . Environmental Protection Agency, EPA New England Regional Office, 5 

Post Office Square - Suite 100, (Mail Code OEP05-2), Boston, MA 02109-3912, telephone 

number (617) 918-1653, fax number (617) 918-0653, e-mail mcdonnell.ida@,epa.gov . 

SUPPLEMENTARY INFORMATION: In the Final Rules Section of this Federal Re ister, 

EPA is incorporating applicable provisions of 310 Code of Massachusetts Regulations (CMR) 

4.00: Timely Action Schedule and Fee Provisions, as amended through September 4, 2009 and 

310 CMR 6.00 : Ambient Air Quality Standards for the Commonwealth of Massachusetts, 310 

CMR 7.00: Air Pollution Control, and 310 CMR 8 :00: The Prevention and/or Abatement of Air 
Outer Continental Shelf Air Regulations Consistency 

Update for Massachusetts . Page 3 of 3 

Pollution Episode and Air Pollution Incident Emergencies, as amended through May 20, 2010 as 

a direct final rule without prior proposal because the Agency views this as a noncontroversial 

submittal and anticipates no adverse comments. A detailed rationale for the approval is set forth 

in the direct final rule . If no adverse comments are received in response to this action rule, no 

further activity is contemplated. If EPA receives adverse comments, the direct final rule will be 

withdrawn and all public comments received will be addressed in a subsequent final rule based 

on this proposed rule. EPA will not institute a second comment period . Any parties interested in 

commenting on this action should do so at this time. Please note that if EPA receives adverse 

comment on an amendment, paragraph, or section of this rule and if that provision may be 

severed from the remainder of the rule, EPA may adopt as final those provisions of the rule that 

are not the subject of an adverse comment. 

For additional information, see the direct final rule which is located in the Rules 

Section of this Federal Register. 

H. Curtis Spalding, 

Regional Administrator, 

EPA New England.