THE CHEMVIRON COMPETITIVE EDGE

A number of studies have shown that Chemviron trailer mounted, dual-phase
extraction systems are more cost effective than either permanently installed
systems or simple vacuum extraction using what's commonly known as a
"vac-truck."

Consider that permanent systems require a significant capital investment in
equipment and materials, as well as trenching and construction of a protective
building. The actual installation of a permanent system can disrupt business at
a busy retail site, often for several weeks. And as shown in the graphs, Chemviron
systems can achieve contamination reduction at a rate equal to a permanent
system at one-third the cost.

Simple "vac-trucks" typically need to be overseen and monitored by a consultant,
and usually events using vac-trucks can only be conducted for 12 hours or less.
Studies comparing the two types of systems have revealed that automated
Chemviron units can be operated continuously for seven days (168 hours)
at the same cost as a 12-hour visit by a vac-truck.


Furthermore, applying an accurate vacuum at an exact depth and the achievement
of optimal mass removal rates are hard to accomplish with a simple vac-truck.
Samples are hard to collect, and the instrumentation needed to monitor and
analyze the contaminants is not a part of most vac-truck rigs. While they do offer
portability, the limitations of vac-trucks make them unacceptable in situations that
require a fully instrumented, automated operation.



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