United States
                               Environmental Protection
                               Agency
                          EPA/540/MR-01/503
                          May 2001
HI Eh Ha d Inwd <
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Table 1. Contaminant Removal Efficiencies (CRE)
Sampling
Event
Detailed
Follow-up
Compound
TCE
VOCs<1>
TCE
VOCsf"
Average Inlet
Concentration
(ppmv)
56
62
11
13
Average
CRE
(%)
99.63
98.87
99.64
98.77
Note:
(1) The CRE for VOCs is carbon-atom based and includes by-
product VOCs
Table 2. VOC Emissions Prior to Carbon Adsorbers
Sampling
Event
Compound
  Average
   Outlet
Concentration
   (ppmv)
Average
Emission
  Rate
 (Ib/hr)
Detailed
Follow-up
   TCE
Chloroform

   TCE
Chloroform
    0.19
    0.46

    0.038
    0.045
 0.0023
 0.0050

0.00039
0.00041
Note:
Rhode Island emission standards for TCE and Chloroform are
0.02 Ib/hr and 0.002 Ib/hr, respectively.
than a 99% confidence level. There was no change in the
CRE for TCE and VOCs between events. This suggests
that there was no catalyst deactivation during the evalua-
tion time period. The TCE emissions during both events
were within the Rhode Island limit of 0.02 Ib/hr. Results indi-
cate that the AIR2000 process can produce certain VOCs,
such as chloroform, as byproducts. On a carbon-atom ba-
sis, less than one percent of the inlet VOCs were converted
to these by-products. Chloroform emissions during the fol-
low-up event were well within the Rhode Island standard of
0.002 Ib/hr. However, the chloroform emissions for the de-
tailed event would have been sufficient for the Rhode Is-
land chloroform emission standards to be exceeded with-
out the additional removal provided  by carbon absorption
beds downstream of the AIR2000 unit. The AIR2000 dem-
onstration unit was not designed for chloroform removal,
and the appearance of this compound during the field evalu-
ation was unexpected given KSE's  experience in related
treatability studies. KSE claims these emissions can be
mitigated through the use of alternative photocatalysts  or
reactor configurations designed for treating single-carbon
chlorinated compounds.

Key findings from the demonstration, including complete
analytical results, operating  conditions, and a cost analy-
sis, will be published in a Technology Capsule and an Inno-
vative Technology Evaluation Report.
                                           For Further Information:
                                           Mr. Vicente Gallardo, Project Manager
                                           EPA Office of Research and Development
                                           National Risk Management Research Laboratory
                                           26 West Martin Luther King Drive
                                           Cincinnati, Ohio 45268
                                           Telephone: (513) 569-7176
                                           Fax: (513)569-7620
                                           E-mail: gallardo.vincente@epa.gov
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