4.4.3.4   Reduction of Mobility, Toxicity, or Volume through
          Treatment -- Alternative 3

This evaluation criterion addresses the statutory preference for
selecting remedial actions that employ treatment technologies
that permanently and significantly reduce the toxicity, mobility,
or volume of hazardous substances.  This preference is satisfied
when treatment reduces the principal threats at a site through
destruction of toxic contaminants, reduction of the total mass of
toxic contaminants, irreversible reduction in contaminant
mobility, or reduction of the total volume of contaminated media. 
Similar to other HTTD systems (see Section 4.4.1.4), the DAVES
process reduces the toxicity and volume of contaminated material
by thermally desorbing contaminants from the waste matrix in the
processor and concentrating them in oils or aqueous streams in
the condensation systems.  The DAVES process is not an
immobilization technology; therefore, the mobility of
contaminants is not reduced.