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 Counsei/~/ ~ k 

Air and Radiation Law Office (2344A) 

Joel Beauvais, Associate Administrator /(){_ (7 ett.,.u, ti cL.Y 

Office of Policy (1804A) J "' cJ 

Gina McCarthy 

Administrator (1101A) 

The purpose of this 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 of the attached redline strikeout version of the 

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 of the 80-percent capture efficiency assumption, as well as 

the requirement for a petition of impracticality. The regulatory text only provided an exemption 

from the requirements to install temporary hooding during testing and the requirement for a 

petition of impracticality. It did not include an exemption from use of the 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 of paragraphs (e)(4)(i), (ii), and (iii) of this 

section .... 

Recycled/Recyclable •Printed with Vegetable Oil Based Inks on 100% Recycled Paper (40% Postconsumer) 
• Section 63 .1510( d)(2)(iii)(A) of the regulatory text states that daily fan motor amperage 

measurements of the 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 of volumetric 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 of the complete preamble and 

amendatory rule text. 

We recommend correction of these inadvertent errors and your approval of these changes by signing and 

dating below. 

Attachment 

cc: Kristien Knapp/OA (1101A) 

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