Control of Volatile Organic Compounds Emissions from Manufacturing

The principle underlying the Byron method is the same as EPA
Method 25. However, rather than using a modified standard GC, the
Byron method uses a process analyzer. This instrument speciates C2
from higher hydrocarbons, but gives a single value for all nonmethane
hydrocarbons. After separation, a1 1 carbonaceous material is combusted
to C02 which is then converted to CH4 before being measured by an FID.
Thus, the variable response of the FID to different types of organics
is eliminated in the Byron 401 as it is in EPA Method 25.
The oxides of nitrogen (NOx) content of the flue gas was determined
using the methodology specified in EPA Method 7. A detailed description
of a11 these sampling and analytical techniques can be found in the
ARC0 test report.
The total flue gas flow rate was determined two or three times
daily using procedures described in EPA Method 2. Based on this
method, the volumetric gas flow rate was determined by measuring the
cross-sectional area of the stack and the average velocity of the flue
gas. The area of the stack was determined by direct measurements.
The work performed during this program incorporated a comprehensive
quality assurance/quality control (QA/QC) program as an integral part
of the overall sampling and analytical effort. The major objective of
the QA/QC program was to provide data of known qua1 ity with respect to
completeness, accuracy, precision, representativeness, and comparability.
D.2.1.3 Test Results. The VOC measurements were made by at
least four of five independent methods for each of eight different
combinations of incinerator temperature and waste streams. Tab1 e D-5
summarizes the results of measured destruction efficiencies (DE's) for
each of these condi tions.
The results indicate that the values for the DE's by Method 25
are consistently lower and of poorer quality. The poorer quality is
indicated by the imprecision reflected by the much larger standard
deviations for this measurement method. The accuracy and representa-
tiveness of these values obtained from Method 25 is, thus, questionable.
If Method 25 results are disregarded, the DE's for all testing combinatio
are found to be consistently above 99 percent.