From: Ross, Sarah M.   HYPERLINK "mailto:[mailto:Sarah.Ross@GAPAC.com]" 
[mailto:Sarah.Ross@GAPAC.com]  

Sent: Monday, April 30, 2012 5:41 PM

To: PPSURVEY

Cc: Hanks, Katie P.

Subject: RE: NEI Site ID #54342 RTR Data Revisions for Georgia-Pacific,
LLC - Crossett Paper Operations, Crossett, Arkansas

My apologies for the delay.  I would like to make the following
clarifications/notes:

SN61 (Line 2 Decker) - This unit is on the 4th floor (~223ft off the
ground), inside a building in our Bleach Plant.  This decker (cylinder)
spins inside of a vat that is 26ft by 10ft.  

SN76 (Black Liquor Storage Basin) – the opening of this basin is ~15ft
above ground level, but the basin is partly underground.  The plan
outlined below to keep the original stack diameter of 0.003 ft,
determine the area of the circular emission unit (A = πr2) using the
revised stack diameter of 434.5 ft, and assign the square root (385 ft)
of that area to each of the fugitive length and width fields should
accomplish your goal.

Please let me know if I can clarify further.  Again, my sincere
apologies for the delay.

Sincerely,

Sarah Ross

Environmental Engineer

(870) 567-8670

From: PPSURVEY   HYPERLINK "mailto:[mailto:ppsurvey@rti.org]" 
[mailto:ppsurvey@rti.org]  

Sent: Tuesday, April 24, 2012 2:33 PM

To: Ross, Sarah M.

Cc: Bill Schrock; John Bradfield; Hanks, Katie P.

Subject: RE: NEI Site ID #54342 RTR Data Revisions for Georgia-Pacific,
LLC - Crossett Paper Operations, Crossett, Arkansas

Ms. Ross,

I just wanted to follow up regarding the corrections you provided to the
model risk inputs for the Georgia-Pacific facility in Crossett,
Arkansas.  I wanted to let you know that we plan to finalize our review
of the revisions by May 4th, and, before that happens, I wanted to see
if you had any changes to make to the model risk inputs based on our
questions in the e-mail below. 

Thanks for taking a look into this for us.  We appreciate your help. 
My contact information is provided below in case you have any questions.

Thomas C. Holloway

RTI International

3040 Cornwallis Rd., P.O. Box 12194

Research Triangle Park, NC 27709

Phone: (919) 316-3733

Fax: (919) 541-7155

E-mail:   HYPERLINK "mailto:tcholloway@rti.org"  tcholloway@rti.org 

From: PPSURVEY 

Sent: Wednesday, March 14, 2012 4:12 PM

To:   HYPERLINK "mailto:Sarah.Ross@gapac.com"  Sarah.Ross@gapac.com 

Cc: Bill Schrock; John Bradfield; Hanks, Katie P.

Subject: RE: NEI Site ID #54342 RTR Data Revisions for Georgia-Pacific,
LLC - Crossett Paper Operations, Crossett, Arkansas

Ms. Ross,

We are EPA’s contractor for reviewing the revisions to the NEI file
for the pulp and paper industry.  We have reviewed your corrections to
the model risk inputs for your facility (Georgia-Pacific, LLC –
Crossett Paper Operations, NEI ID NEI54342).  Thank you for taking the
time to prepare the corrections.  We have some questions about the
revisions to emission release point type and/or stack parameters that
you provided for a couple of emission units, specifically SN61 (Line 2
Decker) and SN76 (Black Liquor Storage Basin).

In your corrections to SN61, the emission unit was changed from a
fugitive source to a vertical point source, the stack diameter was
changed from 0.003 ft to 26 ft, and the stack height was kept at 10
ft.  EPA’s NEI guidance regarding non-fugitive emission release
points states that the stack height may not be less than the stack
diameter. Could you review the corrections that you provided for SN61 to
see whether the source type (fugitive, point source) or stack parameters
(stack diameter, stack height) for this emission unit need to be
changed?  For example, instead of 26 ft, is the stack diameter for SN61
actually 2.6 ft or 26 inches (i.e., 2.17 ft)?  If the stack diameter
and stack height you’ve provided are correct, our plan is to keep this
emission unit as a fugitive source, keep the original stack height of 10
ft and original stack diameter of 0.003 ft, determine the area of the
circular emission unit (A = πr2) using the revised stack diameter of 26
ft, and assign the square root (23 ft) of that area to each of the
fugitive length and width fields.  Please let us know what changes can
be made to these data to be consistent with NEI guidance.

à

â

 (A = πr2) using the revised stack diameter of 434.5 ft, and assign the
square root (385 ft) of that area to each of the fugitive length and
width fields.  Do you agree with these changes?

t us know if you have any questions.

Thomas Holloway

RTI International

  HYPERLINK "mailto:ppsurvey@rti.org"  ppsurvey@rti.org 

1-877-834-7065

