From: Barrows, Robin
To: Hancy, Cindy Wang
Cc: Cherry, Lori ; Abraczinskas, Michael ; Lasater, Richard Subject: RE: Cr Electroplating Info Request - EPA
Date: Thursday, February 24, 2011 4:52:45 PM
Attachments: RTI NC Chrome Electroplaters.xlsx Stack Tests.pdf

Ms. Hancy, Attached you will find a spread sheet that has some of the data for which you were looking. DAQ does not routinely collect detailed data for the rectifiers in their permitting process. I would suggest querying the facilities directly for these data. Also attached are the stack test data that we
have available. Those data are also not routinely collected by DAQ. Please feel free to contact me directly if you have further questions. Regards,
Robin Barrows

**Robin R. Barrows, Environmental Senior Scientist**
Toxics Protection Branch
Technical Services Section Division of Air Quality, NC DENR 1641 Mail Service Center Raleigh, NC 27699-1641 phone: (919) 715-6319

FAX: (919) 733-1812 **Robin.Barrows@ncdenr.gov** http://www.ncair.org

Opinions expressed in this message may not represent the policy of my agency. All email sent to or from this sender may be subject to the North Carolina Public Records Law and may be disclosed to third parties.

Please consider the environment - do you really need to print this document?

From: Hancy, Cindy Wang [mailto:chancy@rti.org] Sent: Thursday, February 03, 2011 3:04 PM To: Barrows, Robin Subject: Cr Electroplating Info Request - EPA

Robin,

Thank you for speaking with me today. I have received what you sent to Anne Pope and will review that data to see if it contains anything we may need. Below is a bulleted list of the most important information we are looking for. Please see if there is anything you may find that would be helpful.

The U.S. Environmental Protection Agency (EPA), is performing the residual risk and technology
review of the National Emission Standards for Hazardous Air Pollutants: Hard and Decorative Chromium Electroplating and Chromium Anodizing Tanks (Chromium Electroplating NESHAP). Amendments to the NESHAP were proposed on October 21, 2010 (75 FR 65068), and EPA is undera court-ordered deadline to finalize the amendments by June 30, 2011. Several of comments received on the October 2010 proposal stated that EPA lacked adequate data to fully assess the risk associated with emissions from chromium electroplating sources; other commenters stated that EPA did not account for the facilities with the highest risk. In response to those comments, EPA is now trying to collect data on potentially high risk facilities. RTI International is assisting EPA in this effort by contacting several State agencies to request data on the 5 to 10 facilities in those States that are likely to have the highest risk.

The most critical data needs are:

For each chromium electroplating or anodizing tank:

· Type of chromium electroplating process (hard, decorative, trivalent, anodizing)

· Surface dimensions (length and width)

· Rectifier capacity (amperes)

· Limits on rectifier operation (ampere-hours per year)

· Maximum permitted process operating hours (hours per year)

· Typical process operating hours (hours per year)

· Emission control method

· Emission test data (complete test report, if available)

In order to remodel risk for this source category and re-evaluate the regulatory options for reducing risk to acceptable levels, while meeting the June 30, 2011 deadline, we would like to obtain the requested information as soon as possible, and no later than the end of February 2011.

If you have any questions about this request or would like to discuss any issues related to the Chromium Electroplating NESHAP, you can contact Phil Mulrine with EPA's Office of Air Quality Planning and Standards. Phil can be reached by phone at: 919-541-5289, or by email at: mulrine.phil@epa.gov.

Thanks again for your help, and I look forward to talking to you soon.

Cindy Wang Hancy
RTI International
P.O. Box 12194 Research Triangle Park, NC 27709
Phone: (919) 541-6623

Fax: (919) 316-3420