 ADVANCE \y63 

	UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

	REGION III

1650 Arch Street

	Philadelphia, Pennsylvania  19103-2029

									April 23, 2010

Ms. Joyce E. Epps, Director

Bureau of Air Quality

Pennsylvania Department of Environmental Protection

Rachel Carson State Office Building

P.O. Box 2063

Harrisburg, PA 17105-2063

Dear Ms. Epps:

On April 14, 2010, the U.S. Environmental Protection Agency (EPA)
received a revision to the Pennsylvania State Implementation Plan (SIP)
from the Pennsylvania Department of Environmental Protection (PADEP). 
This SIP revision pertains to the attainment demonstration for the 1997
fine particulate (PM2.5) national ambient air quality standard (NAAQS)
for the Pennsylvania portion of the Philadelphia-Wilmington, PA-NJ-DE
PM2.5 nonattainment area.  EPA has determined that the submittal is
administratively and technically complete, and is reviewing it to
prepare a Notice of Proposed Rulemaking.  

If members of your staff have any questions, they may direct them to
Rose Quinto, Office of Air Program Planning, at (215) 814-2182.  She is
the principal contact for this rulemaking.    

	Sincerely, 

						         /s/

          David L. Arnold, Acting Director

                          			          Air Protection Division 

cc:  Arlene Shulman, PADEP

	Customer Service Hotline: 1-800-438-2474

