From: Peter Westlin/RTP/USEPA/US

To: Rochelle Bo yd/RTP/USEPA/US@EPA Cc: Robin Segall/RTP/USEPA/US@EPA, Gary McAlister/RTP/USEPA/US@EPA, Parker.Barrett@epa.gov, Ron My ers/RTP/USEPA/US@EPA, Jason Dewees/RTP/USEPA/US@EPA, William Grimley /RTP/USEPA/US@E PA, agnew.rachel@epa.gov, driscoll.tom@epa.gov, Jeff Ry an/RTP/USEPA/US@EPA Date: 07/12/2010 01:28 PM Subject: Re: Fw: Information Collection Request for the Secondary Aluminum Production Source Category

Rochelle: My responses (please share as b roadly as needed): You may use SW 846 Method 6010C in lieu of Method 6020A for Hg analy ses with the caveat that if the lab finds values less than the IDL documented for in accordance with the method, we would expect a re

- anal ys is with Method 6020A. For the determining the Cr6 content, we recommend ASTM D5451

- 93(2008) the dust sampling, we recommend SW 846 Method 3060A and to Method 7195 or 7197 for anal ys is. You may

report data anal yz ed with Method 7196 if you find levels above the test specific method detection level. If not, you should use one of the more sensitive methods. In stead of specifying a minimum expected method level, we refer to specific anal yt ical methods, in this case, Method 7195 or Method 7197. Please report data in terms of the method detection level (e.g., below detection level, BDL) and not the method reporting limit. Peter Westlin Measurement Policy

Group OAQPS, SPPD 919

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----- Forwarded b y Rochelle Bo yd/RTP/USEPA/US on 07/12/2010 07:45 AM

----- From: "Rick Moore" < rmoore@aal

- inc.com> To: Rochelle Bo yd/RTP/USEPA/US@EPA Date: 07/09/2010 03:34 PM Subject: In formation Collection Request for the Secondary Aluminum Production Source Category Dear Ms. Bo yd: We have been asked to provide anal yt ical support in the way of sample analy sis and data report preparation in response to the “Information Collection Request for the SecondaryAluminum Production Source Category”.

On review of the May

27, 2010 information request letter and the Enclosure 1, I have a few qu estions that need your clarification pertaining to the baghouse dust analy sis portion of this request: 1. Do you have an Excel report format for the baghouse dust data? 2. InTable 2.2 a) is EPA Method 6020 (I CP/MS) the only method allowed for Hg anal ys is? While Hg can be anal yz ed b y ICP/MS it is not the generall y preferred method. b) Is the sample preparation method EPA Method 3051 (Microwave Digestion) the only sample preparation method allowed or would other sample preparation methods be permitted (for example those that use a Parr bomb) or other digestion techniques? 3. Concerning Hexavalent Cr analy sis is EPA Method 218.6 the only acceptable method for this anal ys is? I have concerns that the method has been developed for aqueous matrices and that chlorides and other metals species can cause anal yt ical problems for this ion chromatographic method. What is the desired Reporting Li mit in the solid material?

Your prompt assistance with these questions would be appreciated. If you need to discuss them further I will be available either b y phone or b y email at the address below. Thank you, Rick Moore President American Anal yt ical Laboratories, Inc. 840 South Main Street Akron OH 44311 rmoore@aal

- inc.com ph: 330

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- 1300 fax: 330

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