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CANONIE ENVIRONMENTAL SERVICES CORPORATION
(Low Temperature Thermal Aeration [LTTA])

This vendor is participating in the EPA Superfund Innovative 
Technology Evaluation (SITE) Program.  The following technology 
profile has been reproduced from the SITE Technology Profile 
document, 7th edition.  The SITE profile has been supplemented by 
MVA Consulting Inc. using information obtained from the vendor or 
from other SITE publications, referenced at the end of this file. 

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TECHNOLOGY DESCRIPTION:

The Low Temperature Thermal Aeration (LTTA ) technology is a low-
temperature de-sorption process (see figure below).  The
technology 
removes organic contaminants from contaminated soils into
a contained air stream, which is extensively treated to collect
or thermally destroy the contaminants.

A direct-fired rotary dryer heats an air stream which, by direct
contact, desorbs water and organic contaminants from the soil. 
Soil can be heated to up to 800 degrees Fahrenheit.  The
processed soil is quenched to reduce tempera-tures and mitigate
dust problems.  The processed soil is then discharged into a
stockpile.  The hot air stream that contains vaporized water and
organics is treated by one of two air pollution control systems. 
One treatment system removes the organic contaminants from the
air stream by adsorption on granular activated carbon (GAC) and
includes the following units in a series:  1) cyclones and
baghouse for particulate removal; 2) wet scrubber for acid gas
and some organic vapor removal; and 3) GAC adsorption beds for
organic removal.

The second air stream treatment system can treat soils containing
high concentrations of petroleum hydrocarbons.  The system
includes the following units in a series:  1) cyclones for
particle removal; 2) thermal oxidizer-afterburner for destruction
of organics; 3) quench tower for cooling of air stream;
4) baghouse for additional particle removal; and 5) wet scrubber
for acid gas removal.

The LTTA  process generates no wastewater or waste soils. 
Cyclone fines and baghouse dust are combined with treated soil
and quenched with treated scrubber water.  The treated soil, once
verified to meet the treatment criteria, is backfilled on site
without restrictions.  GAC beds used for air pollution control
are regene-rated or incinerated when spent.

WASTE APPLICABILITY:

LTTA  can remove volatile organic compounds (VOC), semivolatile
organic compounds (SVOC), organochlorine pesticides (OCP),
organophosphorus pesticides (OPP), and total petroleum
hydrocarbons (TPH) from soils, sediments, and some sludges. 
LTTA  has been used at full scale to remove VOCs such as benzene,
toluene, tetrachloroethene, trichloro-ethene, and dichloroethene;
SVOCs such as ace-naphthene, chrysene, naphthalene, and pyrene;
OCPs such as dichlorodiphenyltrichloroethane (DDT); DDT
metabolites, and toxaphene; OPPs such as ethyl parathion, methyl
parathion, merphos, mevinphos; and TPHs.

STATUS:

The LTTA  technology was accepted into the SITE Demonstration
Program in summer 1992.  LTTA  was demonstrated on soils contam-
inated with OCPs during full-scale site remediation at a
pesticide site in Arizona during September 1992.

The full-scale LTTA  system has remediated contaminated soils at
six sites, including three Superfund sites.  The system has
treated more than 100,000 tons of soil.

DEMONSTRATION RESULTS:

Key findings from the demonstration are summarized below:

>  The LTTA  process met the specified cleanup criteria for the
   site, a sliding scale criteria correlating the concen-trations
of 
   DDT family compounds (dichlorodiphenyldichloroethylene [DDE]
or
   tetrachlorodiphenylethane, DDE, and DDT) with concentrations
   of toxaphene.  The maximum allowable pesticide concentrations
   in the treated soil were 3.52 milligrams per kilogram (mg/kg)
   of DDT family compounds and 1.09 mg/kg of toxaphene.

   Compound     Efficiency

   4,4'-DDD     >99.97 %
   4,4'-DDE     >90.26 % 
   4,4'-DDT     >99.97 %
   Endrin      >99.97 %
   Toxaphene    >99.97 %
   Endosulfan 1 >99.97 %
     
>  Residual levels of all the pesticides in the treated soil
   were generally below or close to the laboratory detection
   limit, with the exception of 4,4'-DDE, which was found at
   residual concentrations of 0.1 to 1.5 mg/kg.  Removal
   efficiencies for pesticides found in the feed soil at
   quantifiable concentrations are summarized below:


>  The LTTA  process did not generate dioxins or furans as
   products of incomplete combustion or thermal transformation.

FOR FURTHER INFORMATION:

EPA PROJECT MANAGER:
Paul dePercin
U.S. EPA
Risk Reduction Engineering Laboratory
26 West Martin Luther King Drive
Cincinnati, OH  45268
513-569-7797
Fax: 513-569-7620

TECHNOLOGY DEVELOPER CONTACT:
Thomas Froman
Canonie Environmental Services Corporation
800 Canonie Drive
Porter, IN  46304
219-926-8651Fax: 219-926-7169
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Sources of information in this profile:

EPA Superfund Innovative Technology Evaluation Program 
        Technology Profiles Seventh Edition, November 1994. 
        EPA/540/R-94/526.

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