Current through Register Vol. 48, No. 38, September 20, 2024
a)
Requirements for a Test Liner
A test full shall be constructed before construction of the
actual, full-scale compacted earth liner, in accordance with the following
requirements:
1) The test liner shall
be constructed from the same soil material, design specifications, equipment
and procedures as are proposed for the full-scale liner;
2) The test fill shall be at least four times
the width of the widest piece of equipment to be used;
3) The test fill shall be long enough to
allow the equipment to reach normal operating speed before reaching the test
area;
4) At least three lifts shall
be constructed;
5) The test fill
shall be tested as described below for each of the following physical
properties using tests to ensure a statistically valid sample size:
A) Field testing techniques shall be used to
determine the hydraulic conductivity.
B) Samples shall also be tested in the
laboratory for hydraulic conductivity. The laboratory results shall be
evaluated to determine if there is a statistical correlation to the field
testing results.
C) Other
engineering parameters, including but not limited to particle size
distribution, plasticity, water content, and in-place density, that are needed
to evaluate the full-scale liner shall be determined.
6) Additional test fills shall be constructed
for each time the material properties of a new borrow source changes or for
each admixture or change in equipment or procedures; and
b) Construction of a test fill or the
requirements for an additional test fill may be omitted if a full-scale liner
or at est fill has been previously constructed in compliance with this
subsection and documentation and is available to demonstrate that the
previously constructed liner meets the requirements of subsection
(a).
c) The CQA officer shall
inspect the construction and testing of test fills to ensure that the
requirements of subsection (a) are met. During construction of the actual,
full-scale compacted earth liner, the CQA officer shall ensure the following:
1) Use of same compaction equipment as used
in test fill;
2) Use of same
procedures, such as number of passes and speed;
3) Uniformity of coverage by compaction
equipment;
4) Consistent
achievement of density, water content and permeabilty of each successive
lift;
5) Use of methods to bond
successive lifts together;
6)
Achievement of liner strength on sidewalls;
7) Contemporaneous placement of protective
covering to prevent drying and desiccation, where necessary;
8) Prevention of the placement of frozen
material or the placement of material on frozen ground;
9) Prevention of damage to completed liner
sections; and
10) That construction
proceeds only during favorable climatic conditions.
