UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, D.C. 20460


## SEP 1 0 -.2015

MEMORANDUM SUBJECT: Correction oflnadvertent Errors in the Final Rule: National Emission Standards for Hazardous Air Pollutants for Secondary Aluminum Production FROM:
THRU:

TO: Janet G
. McCabe

## ~G/ c...... Acting Assistant Administrator (6101 A) 

### Lorie Schmidt, Associate General

# Counse**i/~/ ~** 

# k Air and Radiation Law Office (2344A) Joel Beauvais , Associate Administrator /(){_ 

# (7 ett.,.u, ti

# cL.Y Office ofPolicy (1804A) 

# J "' 

# cJ Gina McCarthy Administrator (1101A) The purpose ofthis action is to correct a few inadvertent errors made in the final rulemaking signature package for the Clean Air Act section 112 national emission standards for hazardous air pollutants (NESHAP) for the Secondary Aluminum Production source category that you signed on August 14, 2015
. We recommend making the changes discussed below.

• The regulatory text did not contain the word " flux " in between the words " fluorine " and
" injection" in section 63.1506(n)(l) on page 221 ofthe attached redline strikeout version ofthe rule package and in Table 2 on page 295
. We intended to add the word " flux " in these two places to be consistent with the language used throughout the preamble and rule. To correct this clerical error, we have added the word " flux " to this section and Table 2.
• The preamble states our intent to exempt round top furnaces from the requirements to install temporary hooding during testing, use ofthe 80-percent capture efficiency assumption, as well as the requirement for a petition ofimpracticality
. The regulatory text only provided an exemption from the requirements to install temporary hooding during testing and the requirement for a petition ofimpracticality. It did not include an exemption from use ofthe 80-percent capture efficiency assumption
. This was an inadvertent drafting error. To correct the error, we have revised the regulatory text in Section 63.1512(e)(4)(v) on page 252 by adding " and (iii). " The corrected regulatory text reads as follows: o Round top furnaces constructed before February 14, 2012 , and reconstructed round top furnaces are exempt from the requirements ofparagraphs (e)(4)(i) , (ii) , and (iii) ofthis section
....

Recycled/Recyclable •Printed with Vegetab le O il Based In ks on 1 00% Recycled Paper (40% Postcons u mer)• Section 63 .1510(d)(2)(iii)(A) ofthe regulatory text states that daily fan motor amperage measurements ofthe capture and collection systems may be taken in lieu of conducting annual EPA Test Methods 1 and 2. However, footnote " d" in Table 3 does not mention this alternative provision. This was an inadvertent drafting error. To correct the error we have revised the regulatory text in footnote " d" in Table 3 on page 301 by adding the phrase " or daily fan motor amp. " The corrected regulatory text reads as follows : o The frequency ofvolumetric flow rate measurements may be decreased to once every 5 years if daily differential pressure measures , daily fan RPM , or daily fan motor amp measurements are made in accordance with§ 63.1510(d)(2)(ii-iii). The attached redline strikeout version of the preamble and rule shows the corrections to the rule package
. These revisions also include several minor typographical , clerical and formatting corrections to the preamble and rule text. We are also attaching the clean version ofthe complete preamble and amendatory rule text. We recommend correction ofthese inadvertent errors and your approval ofthese changes by signing and dating below.

Attachment
cc: Kristien Knapp/OA (1101A) 

# Sd;-t--;01 ZtJ; f I Dated