TRC Environmental Solutions Inc.
21 Technology Drive
Irvine California 92718
September 15, 1997
Project No. 95-303
Impact Roller Technology, Inc.
Attention: Scott Roth, President
1508 J. F. Kennedy Drive
Bellevue, Nebraska 68005-3642
Impactor 2000 Compaction Performance
Clay Liner Construction
RCRA Equivalent Hazardous Waste Cell
Koppers Company Inc. Superfund Site
Dear Mr. Roth:
The Impactor 2000 proved its effectiveness in our project. We had good
results achieving the compaction window specified to meet shear strength
and permeability requirements associated with clay liner construction
for a RCRA Equivalent hazardous waste cell.
Initially we experienced difficulties achieving the specified compaction
window using conventional sheepsfoot compactors. After several test
pads, and intensive testing Baldwin Contracting, Co. decided to use
the Impactor 2000.
Once we became familiar with this piece of equipment compaction operations
resumed effectively, yielding excellent production rates and good field
test results. Measured Permeability values of the clay liner were less
than 1.0 centimeters per second as specified. Compaction results are
shown in Figure 1*. Clay properties are included in Figure 2*, Figure
3*, and Figure 4*.
Thank you for providing an excellent piece of equipment of great value
to the construction industry.
Sr. Project Engineer/Geotechnical
* These Figures will be supplied upon request. E-Mail
us your address and request Figures 1 through 4.