ETL 1110-1-158
28 Feb 95
economically achieves the chemical and physical test objectives
established for the project.
The amount of replicate testing should be proposed by the
Contractor for each phase of the treatability study. Sample
preparation procedures, curing methods, and curing times should
also be proposed by the Contractor.
Paragraphs 2.4.3 and 2.4.4 require the Contractor to propose the
sequence of testing and test methods to be used during the
treatability study. Depending on the experience of the designer,
some parts or all of these sections may be specified by the
designer. In cases where the designer specifies the sequence of
testing and test procedures, the Contractor should be given the
opportunity to suggest modifications to the testing program based
on past experience.
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2.4.3
Initial Mixing and Testing.
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The Contractor should be tasked with identifying what waste/
reagent/water mix ratios will be evaluated in the initial round
of testing. The objective of the initial round is to determine
what reagents provide the best performance. These tests are
screening tools to help formulate and refine what final mixes
will be tested. The Contractor should outline the number and
type of tests to be performed, sample preparation procedures,
curing methods, curing times, and the number of replicate
samples.
After completion of initial mixing and testing, the Contractor is
sometimes required to submit a report to the Government which
summarizes all data collected during the initial mixing and
testing phase of the treatability study. Where applicable, ASTM
or EPA reporting requirements should be used. Otherwise, raw
data should be reported in tabular or graphic form. The
Contractor should include a recommendation for reagents and
waste/reagent/water ratios to be tested during the final mixing
and testing phase. After review and approval, the Government
will issue a written order to the Contractor to proceed with
final mixing and testing.
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2.4.4
Final Mixing and Testing.
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B-6
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