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This method of test is intended to determine the permeability of core specimens of undisturbed soils. The test procedure and equipment were developed to test standard undisturbed specimens 3¼ in. in diameter by 3-in. minimum length, or standard core sizes up to 9 in. in length. Remolded soil specimens with or without admixtures may also be tested by this means if desired. For soils, the test is usually limited to those having a maximum particle size of ¼ in.
Chief, Earth Materials Laboratory, U. S. Bureau of Reclamation, Denver, Colo.