TITLE
Field Tests of Chloroform Collection/Analysis Methods

AUTHOR(S)
W.C. Eaton, L. B. Jaffe, E. E. Rickman, and R. K. Jayanty, Research
Triangle Institute, Research Triangle Park, NC  27709

PERFORMING ORGANIZATION NAME AND ADDRESS
Research Traingle Institute
Research Triangle Park, NC 27709

SPONSORING AGENCY NAME AND ADDRESS
U.S. Environmental Proetection Agency
AREAL/MRDD/SMRB (MD-77A)
Research Triangle Park, NC  27711

ABSTRACT
     The Clean Air Act Amendments of 1990 call for the regulation
of numerous toxic chemical species emitted from stationary sources. 
One of the toxic species is chloroform, an organic compound emitted
from paper mills employing the chlorine/chlorine dioxide bleaching
process.  Two candidate methods were field tested for the
collection and analysis of chloroform.  Collection efficiencies of
a Tedlar bag method and a charcoal adsorbent tube method were
compared.  Samples from each method were collected from the
hypochlorite tower vent (300 ppm chloroform source) of a paper mill
bleach plant in South Carolina.  The two methods were compared
using the statistical procedures listed in EPA Method 301, "Field
Validation of Emission Concentrations from Stationary Sources." 
Based upon the comparison, the charcoal tube method was selected;
revision and further testing of that method was performed at a
second paper mill bleach plant in North Carolina.

     Results from a number of laboratory studies and field testing
of the methods are discussed.  The precision of both methods was
found to be acceptable.  The bias and precision of the revised
charcoal tube method were found to be acceptable per EPA Method 301
specifications.  The revised charcoal tube method is recommended
for the collection and analysis of chloroform emissions from
stationary sources.