xvEPA
                 United States
                 Environmental Protection
                 Agency
                 Solid Waste and
                 Emergency Response
                 5403W
EPA510-F-93-027
October 1993
Soil Remediation For
UST Sites
Excavation And  Off-Site
Treatment
                   Excavation and off-site treatment is a method for
                   removing contaminants from small volumes (less than
                 1,000 cubic yards) of soil that cannot be treated
                 effectively on site. Contaminated soil is excavated and
                 then treated. Typical treatment facilities include:
                    Low temperature thermal desorption facilities

                    Asphalt plants

                    Incinerators
                 This technique can be used with many different kinds of
                 soils and contaminants. It offers the benefit of actually
                 destroying contaminants rather than simply moving them
                 from one location to another.
                    Petroleum Types And Constituents

                     All types of petroleum products

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Excavation And Off-Site Treatment
Advantages
limitations
System
Components
Wastestream
Treatment
Parameters to
Monitor1
Cleanup Levels
and Timing2
Costs3
 Easy and rapid to implement
 Destroys contaminants
 Minimizes long-term liability
 Can reuse some types of soil for backfill
 Effective on soils with varying concentrations and
constituents
 Expensive for large volumes of soil with low contaminant
concentrations, high moisture, or clay content
 Transportation costs can be high
 System components can include:
 Excavation equipment
 Trucking equipment
 Equipment for sorting and sizing
 Rotary dryer or kiln
 Thermal screw
 Off gas treatment equipment
 Air emissions equipment
 Contaminant concentrations in pre- and post-treatment
soil
 Can excavate to cleanup standards
 >99% removal efficiency
 Typically completed in 1 to 3 days
 For an average site4, $70,000 to $180,000 ($70
$180/cu yd)
to
'"Parameters to monitor are for performance purposes only; compliance monitoring parameters vary by state.
Cleanup standards are determined by the slate.
^Costs include equipment, and operation and maintenance.
4An "average site" assumes minimal delays in corrective action and a moderately heterogeneous and permeable subsurface.

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