ENVIRONMENTAL PROTECTION AGENCY 40 CFRPart 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 aportion 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 fromOCS 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.gov3. 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 EcosystemProtection, U .S. Environmental Protection Agency, EPA New England Regional Office, 5 Post Office Square - Suite 100, (Mail Code OEP05-2), Boston, MA02109-3912. 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, 8:30to 4:30, excluding legal holidays. 

### Please see the direct final rule which is located in the Rules Section ofthis Federal Register for detailed instructions on how to submit comments. FORFURTHERINFORMATIONCONTACT: 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 CMR6

.00: Ambient Air Quality Standards for the Commonwealth of Massachusetts, 310 CMR 7.00

: Air Pollution Control, and 310 CMR8:00 : The Prevention and/or Abatement ofAirOuter Continental ShelfAir 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. Adetailed rationale for the approval is set forth in the direct final rule. Ifno 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. EPAwill not institute a second comment period. Any parties interested in commenting on this action should do so at this time. Please note that if EPAreceives adverse comment on an amendment, paragraph, or section of this rule and ifthat provision may be severed fromthe 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.