4.4.3.6   Implementability -- Alternative 3

Implementation considerations for the DAVES process include
technical feasibility, administrative feasibility, and
availability of services and materials.  Additional information
is also needed to implement the DAVES process.  These
considerations are discussed below.

Technical Feasibility

The DAVES process has not been used at full scale to treat wastes
from hazardous waste sites; therefore, the reliability of the
system and its technical difficulties cannot be assessed.  RSI
has conducted significant field testing of the DAVES process on
clean soil but has little experience with treating contaminated
materials.  This lack of operating experience makes the DAVES
less technically feasible than other HTTD systems that have been
operated at multiple sites.  

Administrative Feasibility

The administrative feasibility of the DAVES process is similar to
that of other HTTD systems (see Section 4.4.1.6). 

Availability of Services and Materials

The DAVES process is patented and therefore only one vendor
exists that can provide the necessary equipment if this
alternative is selected.  Currently, only one full-scale DAVES
has been constructed.  According to RSI, 100- and 150-ton per
hour systems have been designed and can be constructed within
6 months.  The vapor extractor, which is the primary treatment
unit in the DAVES process, is a modified vertical rolling mill
that crushes stones and rocks.  This unit is available from
Williams Patent Crusher & Pulverizer Company and does not need to
be specially built.  All other APC equipment and conveyance
systems are off-the-shelf items that can be supplied in a
relatively short time.

Additional Information Needed to Implement Desorption and
Vaporization Extraction System

The additional information requirements are similar to those of
other HTTD systems (see Section 4.4.1.3).