SUPPLEMENTARY INFORMATION: In today’s action, EPA is providing additional time to submit public comment on the following proposed rules: Emissions standards for industrial, commercial, and institutional boilers and process heaters located at major sources (the major source boilers rule); emissions standards for industrial, commercial, and institutional boilers located at area sources (the area source boilers rule); and emissions standards for commercial and industrial solid waste incineration units (the CISWI rule). In the notices of proposed rulemaking for these rules, EPA established a deadline of July 19, 2010, for submission of public comments. On June 9, 2010, EPA extended the public comment period to August 3, 2010. 75 FR 32682. Today, EPA is further extending the deadline for providing comments on these proposed rules to August 23, 2010.
EPA also notes that certain additional materials relating to the maximum achievable control technology (MACT) floors have been added to the dockets for the major and area source boilers proposed rules and the CISWI proposed rule since the date of publication of the proposed rules. At the time of publication of the proposed rules, the docket contained Adobe Acrobat(copyright) versions of the spreadsheets used in the MACT floor calculations, as well as associated memoranda describing in detail EPA’s calculation of the MACT floor for each proposed set of emissions standards. Since the publication date, EPA has added to the docket the same spreadsheets in Excel format.