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U.S. EPA Superfund Innovative
Technology Evaluation (SITE) Program
Environmental Technology Verification Report
Soil sampling Technology
Geoprobe Systems, Inc. Large Bore Soil Sampler
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Soil sampling Technology, Geoprobe Systems, Inc. Large Bore Soil
Sampler (1,190KB)
Abstract:
The Large-Bore Soil Sampler is a sampling tool capable
of collecting unconsolidated subsurface material at depths that depend
on the capability of the advancement platform. The Large-Bore Soil Sampler
can be advanced into the subsurface with direct-push platforms, drill
rigs, or manual methods. The Large-Bore Soil Sampler was demonstrated
in May and June 1997 at two sites: the Small Business Administration (SBA)
site in Albert City, Iowa, and the Chemical Sales Company (CSC) site in
Denver, Colorado. These sites were chosen because each has a wide range
of volatile organic compound (VOC) concentrations and because each has
a distinct soil type. The Large-Bore Soil Sampler was compared to a reference
method (hollow-stem auger drilling and split-spoon sampling) in terms
of the following parameters:
- sample recovery,
- VOC concentrations in recovered samples,
- sample integrity,
- reliability and throughput, and
- cost.
The demonstration data indicate the following performance
and cost characteristics:
- Average sample recoveries for the Large-Bore Soil Sampler
were higher in clay soil and lower in sandy soil.
- There was a statistical difference between the VOC
concentrations for one of twelve Large-Bore Soil Sampler and reference
sample method pairs at the SBA site and for two of eleven pairs at the
CSC site.
- The reference method tends to yield higher concentrations
than the Large-Bore Soil Sampler in sampling coarse-grained soils.
- The integrity of the lined chamber of the Large-Bore
Soil Sampler was not preserved when the sampler was advanced through
highly contaminated soils.
- The Large-Bore Soil Samplers reliability to collect
a sample in the first attempt was higher than that of the reference
sampling method in both clay and sandy soils.
- The Large-Bore Soil Sampler costs for both clay soil
and sandy soil sites were lower than the reference method.
- The cost depends on the amount of samples required,
the sample retrieval time, soil type, soils depth, and the disposal
costs associated with drill cuttings.
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Posted October 1, 1999
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