                 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
                                  REGION III
                               1650 Arch Street
                       Philadelphia, Pennsylvania, 19103

DATE:

April 17, 2020
SUBJECT:
CBI Explanation Memo for Pennsylvania State Implementation Plan Revisions Related to Reasonably Available Control Technology (RACT) Determinations for Case-by-Case Sources under the 1997 and 2008 8-Hour Ozone National Ambient Air Quality Standards (NAAQS)

TO:
File for Docket ID Number EPA-R03-OAR-2019-0657

                                       
CBI has either been removed from the public files or a redacted version of documents with CBI have been add to the Docket file - ID Number  -  EPA-R03-OAR-2019-0657.  

The following facility has a CBI document that has not been added to the Docket file for public consumption: 

 Carpenter Co.


The following facilities have redacted CBI documents that have been added to the Docket file for public consumption:  

 East Penn Manufacturing Co. Inc, Smelter Plant
 GE Transportation  -  Erie Plant
 Graymont Pleasant Gap
 Hazleton Generation
 Magnesita Refractories
 Penn State University
