DEQ-CFW_00088287

DIVISION OF AIR QUALITY
September 22, 1999
MEMORANDUM
To: Steve Vozzo, Fayetteville Regional Office
From: David B. Hughes, Stationary Source Compliance Branch R.
Subject: Dupont Fayetteville Works
Fayetteville, Bladen County, North Carolina
Removal Efficiency and Capture Efficiency of the Dimethyl Formamide (DMF) Scrubber
Conducted May 3 and 28, 1999
The report of the subject testing has been reviewed and deemed acceptable. The testing was performed by
Entropy, Inc. in accordance with the requirements of Air Permit No. 3735R19. The test results demonstrate
that the scrubber was achieving the minimum removal efficiency during the test period. The total enclosure
was verified and compliant values for the scrubber water and air flowrates were established.
The DMF scrubber is installed on the tinting portion of the Butacite® manufacturing process and is subject
to the Maximum Achievable Control Technology (MACT) standard (40 CFR Part 63 Subpart KK) "National
Emission Standards for the Printing and Publishing Industry." DMF is a hazardous air pollutant and the
MACT requires an overall removal of at least 95%. The MACT requires that operating parameters be
established during the initial performance testing to ensure continuous compliance.
The removal efficiency testing was performed on May 28, 1999. The average scrubber removal efficiency was
97.3%. The minimum water flow rate and airflow to the scrubber during testing was set at 6 gallons per
minute and 63 standard cubic feet per minute, respectively. Therefore, the scrubber should not be operated
below these values. The total enclosure was verified on May 3, 1999, and therefore capture efficiency is
assumed to be 100%.
The subject test results are considered an acceptable demonstration of compliance with the applicable removal
efficiency emissions. If I can provide further assistance on this matter, please feel free to contact me at (919)
715-2966.
cc: SSCB File through Mike Aldridge
Central Files - Bladen County
DEQ-CFW 00088287