AQ_F_1900015_20120620_ST_RvwMemo

Chathain County
Division of Air Quality
June 20, 2012
MEMORANDUM
To: Patrick Butler, Raleigh Regional Office
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From: Gary Saunders, Stationary Source Compliance Branch(SSC13
Subject: Arauco Panels USA, LLC (Formerly Uniboard USA, LLC),
Moncure, Chatham County,North Carolina
Facility ID 19/00015, Permit No. 3449T39
MDF Press Enclosure Permanent Total Enclosure Verification
Conducted by DEECO, Inc., May 3, 2011
Tracking No. 2011-091 ST
This memorandum addresses only the results of the permanent total enclosure (PTE)testing
conducted on May 3, 2011 assigned under this tracking number as part of the test series
conducted at the facility through May 11, 2011. The test results from the remaining testing for
compliance with regulatory and site specific permit limits are addressed in separate memoranda
under Tracking Number 2011-071 ST.
Process Description
Medium density fiberboard(MDF) is manufactured by combined hardwood flakes with a urea
formaldehyde resin. A continuous fiber mat is formed from the mixture of flakes and resins and
fed to the press section of the process. The emissions from MDF are fed to the MDF Press Vent
Scrubber (CD-16) discussed under the separate memoranda.
The MDF process is subject to 40 CFR 63 Subpart DDDD,National Emission Standards for
Hazardous Air Pollutants: Plywood and Composite Wood Products. Under this subpart, certain
design specification for wood product enclosures defined in 40 CFR 63.2292 may be used in
conjunction with other test data to demonstrate compliance with specific emission limitations.
The purpose of this test was to demonstrate that the permanent total enclosure met these design
and operational requirements.
Permanent Total Enclosure Testing on May 3,2011
The testing conducted during May 3, 2011 measured the volumetric flow rate from the MDF
press enclosure vent in conjunction with design drawings and in-field measurement to
demonstrate that PTE meets the design specifications required by the subpart. Based upon the
drawings provided, the MDF press enclosure meets the minimum requirements for opening area
(must be less than 5 percent of total enclosure surface area) and distance from VOC emission
points (greater than 4 equivalent opening diameters except where boards enter and exit the
enclosure). Based upon the measurement of the volumetric flow rate leaving the enclosure, the
natural draft opening (NDO) face velocity met the design specification in the subpart. The

Patrick Butler,Raleigh Regional Office
June 20,2012
Page 2
design specification calls for a face velocity greater than 200 feet per minute. EPA Reference
Method 204 was used to demonstrate the design and operation meet the regulatory requirements.
During the test the average face velocity was calculated to be 354 feet per minute. These values
meet the minimum design criteria in the subpart.
The results of the enclosure testing is accepted and demonstrates compliance with the design
standards. If you have any questions,please contact me at [phone] or
[e-mail].
cc: Central Files, Chatham County
IBEAM Documents— 1900015 (MDF Press Enclosure)