4.3.3          Long-Term Effectiveness and Permanence -- Support
               Technologies

Because PCB-contaminated material would be removed from the
sites, the support technologies would be effective in permanently
eliminating (1) the risks associated with the PCB-contaminated
material; (2) the potential for future releases of PCBs to
groundwater, surface water, and air; and (3) the migration of
PCB-contaminated particulates off site.  The support technologies
are reliable because PCB-contaminated materials would be
excavated and removed off site, and the lagoon water,
decontamination water, and process treatment water is treated
before discharge to the storm or sanitary sewer system.  No
significant residual risks are associated with support
technologies.  The long-term effectiveness of the support
technologies will depend on the effective treatment and disposal
of the excavated PCB-contaminated materials and the effective
treatment and discharge of the lagoon water, decontamination
water, and process treatment water.  Performance data, factors
that influence performance, and system limitations are not
applicable to support technology activities.