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HomeMy WebLinkAboutAQ_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