4.3.6          Implementability--Support Technologies

Implementation considerations for support technologies include
technical feasibility, administrative feasibility, and
availability of services and materials.  These considerations are
discussed below.

Technical Feasibility

The reliability of the support technologies is high.  Excavation
is common and should be fairly easy to implement.  The ability to
excavate materials in a manner that minimizes runoff and off-site
migration presents a challenge.  If excavation is implemented in
a sequential approach, the amount of material exposed at any one
time should be minimized.  Landfill reclamation projects have
found this approach effective in minimizing surface water
diversion and run off problems.  The sequential approach involves
bulldozing a strip at a time in a fishbone-type pattern, and
backfilling the strips daily to avoid creating on-site ponds and
to minimize site runoff.  This approach would require extra
measures to avoid contaminating clean areas and would require
foresight in planning excavation logistics, including the use of
haul roads and the selection of decontamination area locations. 
In addition, assessing and preventing potential groundwater
migration through fractured and porous subsurface materials may
complicate implementability. 

About 1 to 3 years are required to excavate the PCB-contaminated
materials at the six sites, transport this material to the CTF,
and backfill the six sites.  The length of time required to
excavate and remove contaminated material may be affected by the
time required to conduct verification sampling to determine the
extent of excavation and the daily amount of contaminated
material that can be stored and treated at the CTF.

Construction and operation of the on-site pump-and-filter system
for the lagoon water, decontamination water, and process
treatment water; decontamination areas; CTF building; materials
handling and sorting equipment; and secondary treatment systems
can be readily implemented.  These activities should involve
proven construction and mechanical technologies and readily
available equipment.  

Administrative Feasibility

The support activities would require coordination and approval
from local planning, zoning, and utilities agencies. 
Westinghouse will be required to submit plans to show how the
support activities will be conducted in a safe manner. 

Availability of Services and Materials

Services and materials for the construction and operation of the
various buildings and systems associated with the support
technologies are readily available.  The CTF building should have
adequate capacity for equipment storage and for additional
processing equipment that may be required by specific alternative
treatment technologies.