AQ_F_1900039_20151030_ST_RvwMemo

Chatham County
DIVISION OF AIR QUALITY
October 30, 2015
MEMORANDUM
To: Patrick Butler, Raleigh Regional Office
From: Gary L. Saunders, Stationary Source Compliance Branch(SSCB) S
Subject: Moncure Plywood
Moncure, Chatham County, North Carolina
Facility ID 1900039, Permit No. 03424T23
Total Hydrocarbon,_ Formaldehyde and Methanol Emissions Testing for Emission Factor
Development from 40 Panel Hot Press (ES-13-40HP)
Conducted by Civil&Environmental Consultants, December 10, 2014
Tracking No. 2014-233ST
The emissions test report for the referenced process unit has been reviewed. Moncure Plywood
operates a plywood plant in Moncure, NC and has taken permit limits to stay below the
individual and combined hazardous air pollutant (HAP)thresholds of 10 tpy for any listed HAP
and 25 tpy for any combination of HAPs. Under the permit with these limitations, the process
was not subject to the National Emission Standards for Hazardous Air Pollutants (NESHAP)for
Plywood and Composite Wood Products, 40 CFR 63, Subpart DDDD (4D). The process was
tested under two operating scenarios; emissions while producing pine-based plywood and while
producing hardwood-based plywood. The emissions data is for use in emission factor
development in association with the permit emission limitations.
Hardwood and pine veneer run through a curtain coater where a layer of glue is applied to the
sheets of veneer. The sheets are then layered to form plywood panels and after the panels are
constructed they enter a prepress to help the panels stay together. Forty panels can be entered
into the press, one at a time, and when all panels are loaded,the press closes. Temperature and
pressure are applied to the panels for between 5-10 minutes depending upon the panel thickness.
After the proper time has elapsed, the panels are discharged onto an unloader assembly and onto
a conveyor.
A temporary total enclosure was constructed around the press system and it was tested in
accordance with EPA Reference Method 204. It satisfactorily met the requirements of Method
204 as a temporary total enclosure. Emissions of VOC (as propane and carbon equivalent) were
measured in accordance with Reference Method 25A. The results in the table represent the
uncorrected values for bias and drift in the monitor system. The corrected values give a slightly
lower emission rate, so these values are conservative in their predicted emission rate from the
emission factors. Emissions of formaldehyde and methanol were measured in accordance with
NCASI Method 98.01. The test results are summarized in the tables below:

Patrick Butler,Raleigh Regional Office
October 31,2015
Page 2
Table 1: 40 Panel Plywood Press Test Condition#1 (Pine)
Test Parameter Method Results
�f THC
As propane (ppmw) M25A 73.9*
As carbon (ppmw) M25A 221.6*
As carbon(lb/hr) M25A 7.77*
As carbon(lb/1000 ft2) M25A 0.416*
Formaldeh de(CH2O)
G lb/hr NCASI 98.01 0.076
lb/1000 ft2 NCASI 98.01 0.0041
Methanol (CH30H)
''. lb/hr NCASI 98.01 1.976
lb/1000 ft2 NCASI 98.01 0.1062
*Not biased and drift corrected. These give conservative (higher)results
Table 2: 40 Panel Plywood Press Test Condition 42 (Hardwood)
Test Parameter Method Results s�
THC
As propane (ppmw) M25A 11.6*
As carbon(ppmw) M25A 34.9*
As carbon (lb/hr) M25A 1.23*
As carbon (lb/1000 ft2) M25A 0.069*
Formaldehyde(CH2O)
lb//hr NCASI 98.01 0.091
lb/1000 ft2 NCASI 98.01 0.0051
Methanol (CH30H)
lb/hr NCASI 98.01 2.083
lb/1000 ft2 NCASI 98.01 0.116
*Not biased and drift corrected. These give conservative (higher) results
In summary, test results are accepted. If you have any questions,please contact me at(919) 707-
8413 or garv.saundersCamcdenngov.
cc: Central Files, Chatham County
IBEAM Documents— 1900039