AQ_F_0900009_20200310_ST_RvwMemo (15)

Division of Air Quality
March 10, 2020
MEMORANDUM
To: Heather Carter, Fayetteville Regional Supervisor
From: Gary L.Saunders, Stationary Source Compliance Branch `
Subject: The Chemours Company—Fayetteville Works
Fayetteville, Bladen County, North Carolina
Facility ID. No.0900009, Permit No.03735T47
Performance Testing for E1 at the Polymers Process Stack on May 14, 2018 by Weston
Solutions, Inc.
Tracking No. 2018-137ST
Summary of E1 Test Program
Sources Tested
During May 14, 2018, emissions testing was conducted on the Polymers during the operation of the
polymers process. The purpose of this testing was to detect and quantify the emissions of one of the
intermediate perfluorinated compounds designated as E1 (Heptafluoropropyl 1,2,2,2-tetrafluoroethyl
ether). There are no controls associated with this stack.
Sampling Method
Sampling was conducted using the Modified Method 18 mini-impinger system. This method draws the
sample through a series of mini-impingers filled with methanol maintained in a dry-ice/methanol bath.
Acyl fluoride compounds will react to form the ester derivative compound for analysis in the laboratory
After sample recovery,the samples were sent to Chemours' contractor,Test America's laboratory in
Denver, Colorado_ This summary of results only addresses the results provided by Test America for
Chemours. Laboratory analysis and quantification was performed using a liquid chromatography
column and a dual mass spectrometer(LC/MS/MS).
Test Results
The reported E1 test results reflect corrected emission rates accounting for dilution and spike recovery
values.
Polymers Process Area
The polymers processing area react and polymerize tetrafluoroethylene with fluorinated vinyl ethers
from the Vinyl Ethers North (VEN) area. The polymerized product is extruded to produce an ion
exchange membrane product (film). Process operations were considered to be normal during the
testing while producing the product designated as SR polymer. The emission test results are presented
in the table below for use in emissions estimates. Where emissions could not be quantified because the
rate was less than the detection limit,the method detection limit(MDL)was reported.

Table 1. Summary of Stack Test Results for E1 from Polymers Stack on May 14,2018
E1 Emission Rate
Test Method Run Number
lb/hr g/sec
1 <_3.39 E-05 <_4.65E-06
2 6.80E-05 8.56E-06
Modified Method 18
3 7.96E-05 7..00E-05
Average 56.15E-05 <_7.75 E-06
Summary and Conclusions
NC DAQ staff members were on site during each day that source testing occurred. DAQ staff observed
the source test teams,the sample recovery and the process operations. Based upon the onsite
observation of the testing and review of the test report, NC DAQ concludes that the testing was
conducted in accordance to the modified testing protocol submitted by Chemours and that the
analytical results appear representative of the stack conditions and process operations during the
testing.
Cc: Central Files—Bladen County
IBEAM Documents-0900009